./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de52.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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-de52.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 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 01:30:36,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 01:30:36,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 01:30:36,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 01:30:36,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 01:30:36,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 01:30:36,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 01:30:36,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 01:30:36,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 01:30:36,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 01:30:36,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 01:30:36,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 01:30:36,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 01:30:36,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 01:30:36,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 01:30:36,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 01:30:36,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 01:30:36,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 01:30:36,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 01:30:36,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 01:30:36,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 01:30:36,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 01:30:36,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 01:30:36,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 01:30:36,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 01:30:36,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 01:30:36,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 01:30:36,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 01:30:36,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 01:30:36,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 01:30:36,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 01:30:36,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 01:30:36,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 01:30:36,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 01:30:36,707 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 01:30:36,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 01:30:36,708 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 01:30:36,708 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 01:30:36,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 01:30:36,710 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 01:30:36,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 01:30:36,712 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 01:30:36,742 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 01:30:36,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 01:30:36,744 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 01:30:36,744 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 01:30:36,745 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 01:30:36,745 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 01:30:36,745 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 01:30:36,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 01:30:36,746 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 01:30:36,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 01:30:36,747 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 01:30:36,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 01:30:36,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 01:30:36,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 01:30:36,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 01:30:36,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 01:30:36,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 01:30:36,748 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 01:30:36,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 01:30:36,748 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 01:30:36,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 01:30:36,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 01:30:36,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 01:30:36,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 01:30:36,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:30:36,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 01:30:36,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 01:30:36,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 01:30:36,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 01:30:36,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 01:30:36,750 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 01:30:36,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 01:30:36,750 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 01:30:36,750 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 01:30:36,750 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 01:30:36,750 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d [2023-02-16 01:30:36,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 01:30:36,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 01:30:36,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 01:30:36,953 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 01:30:36,953 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 01:30:36,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de52.c [2023-02-16 01:30:37,939 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 01:30:38,075 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 01:30:38,076 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de52.c [2023-02-16 01:30:38,081 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecb9c7679/14d5cb2bd64e43e2856933b3bdea1923/FLAG5b2156be7 [2023-02-16 01:30:38,092 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecb9c7679/14d5cb2bd64e43e2856933b3bdea1923 [2023-02-16 01:30:38,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 01:30:38,094 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 01:30:38,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 01:30:38,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 01:30:38,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 01:30:38,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:30:38" (1/1) ... [2023-02-16 01:30:38,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2539e8e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:30:38, skipping insertion in model container [2023-02-16 01:30:38,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:30:38" (1/1) ... [2023-02-16 01:30:38,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 01:30:38,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 01:30:38,223 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-de52.c[368,381] [2023-02-16 01:30:38,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:30:38,241 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 01:30:38,251 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-de52.c[368,381] [2023-02-16 01:30:38,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:30:38,268 INFO L208 MainTranslator]: Completed translation [2023-02-16 01:30:38,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:30:38 WrapperNode [2023-02-16 01:30:38,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 01:30:38,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 01:30:38,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 01:30:38,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 01:30:38,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:30:38" (1/1) ... [2023-02-16 01:30:38,277 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:30:38" (1/1) ... [2023-02-16 01:30:38,289 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-02-16 01:30:38,289 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 01:30:38,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 01:30:38,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 01:30:38,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 01:30:38,296 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:30:38" (1/1) ... [2023-02-16 01:30:38,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:30:38" (1/1) ... [2023-02-16 01:30:38,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:30:38" (1/1) ... [2023-02-16 01:30:38,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:30:38" (1/1) ... [2023-02-16 01:30:38,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:30:38" (1/1) ... [2023-02-16 01:30:38,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:30:38" (1/1) ... [2023-02-16 01:30:38,319 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:30:38" (1/1) ... [2023-02-16 01:30:38,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:30:38" (1/1) ... [2023-02-16 01:30:38,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 01:30:38,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 01:30:38,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 01:30:38,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 01:30:38,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:30:38" (1/1) ... [2023-02-16 01:30:38,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:30:38,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:38,346 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-16 01:30:38,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-16 01:30:38,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 01:30:38,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 01:30:38,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 01:30:38,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 01:30:38,437 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 01:30:38,438 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 01:30:38,522 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 01:30:38,525 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 01:30:38,525 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-16 01:30:38,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:30:38 BoogieIcfgContainer [2023-02-16 01:30:38,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 01:30:38,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 01:30:38,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 01:30:38,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 01:30:38,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 01:30:38" (1/3) ... [2023-02-16 01:30:38,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a1b3289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:30:38, skipping insertion in model container [2023-02-16 01:30:38,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:30:38" (2/3) ... [2023-02-16 01:30:38,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a1b3289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:30:38, skipping insertion in model container [2023-02-16 01:30:38,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:30:38" (3/3) ... [2023-02-16 01:30:38,532 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de52.c [2023-02-16 01:30:38,544 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 01:30:38,544 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 01:30:38,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 01:30:38,588 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;@c378e36, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 01:30:38,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 01:30:38,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-16 01:30:38,594 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:38,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:38,595 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:38,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:38,598 INFO L85 PathProgramCache]: Analyzing trace with hash 62220644, now seen corresponding path program 1 times [2023-02-16 01:30:38,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:38,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264054794] [2023-02-16 01:30:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:38,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:30:38,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:38,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264054794] [2023-02-16 01:30:38,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264054794] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:30:38,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:30:38,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 01:30:38,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013098408] [2023-02-16 01:30:38,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:30:38,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 01:30:38,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:38,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 01:30:38,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 01:30:38,764 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:38,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:38,789 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2023-02-16 01:30:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 01:30:38,790 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-16 01:30:38,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:38,795 INFO L225 Difference]: With dead ends: 29 [2023-02-16 01:30:38,796 INFO L226 Difference]: Without dead ends: 12 [2023-02-16 01:30:38,798 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 [2023-02-16 01:30:38,801 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:38,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:30:38,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-16 01:30:38,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-16 01:30:38,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:38,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2023-02-16 01:30:38,823 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 11 [2023-02-16 01:30:38,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:38,824 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2023-02-16 01:30:38,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:38,824 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2023-02-16 01:30:38,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-16 01:30:38,825 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:38,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:38,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 01:30:38,826 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:38,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:38,828 INFO L85 PathProgramCache]: Analyzing trace with hash 58526560, now seen corresponding path program 1 times [2023-02-16 01:30:38,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:38,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817899326] [2023-02-16 01:30:38,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:38,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:38,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:30:38,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:38,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817899326] [2023-02-16 01:30:38,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817899326] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:30:38,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:30:38,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 01:30:38,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069447420] [2023-02-16 01:30:38,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:30:38,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 01:30:38,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:38,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 01:30:38,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 01:30:38,972 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:39,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:39,007 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2023-02-16 01:30:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 01:30:39,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-16 01:30:39,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:39,008 INFO L225 Difference]: With dead ends: 27 [2023-02-16 01:30:39,008 INFO L226 Difference]: Without dead ends: 18 [2023-02-16 01:30:39,009 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 [2023-02-16 01:30:39,010 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:39,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 27 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:30:39,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-16 01:30:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-02-16 01:30:39,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2023-02-16 01:30:39,017 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2023-02-16 01:30:39,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:39,018 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2023-02-16 01:30:39,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:39,018 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2023-02-16 01:30:39,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 01:30:39,018 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:39,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:39,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 01:30:39,019 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:39,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:39,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1815988777, now seen corresponding path program 1 times [2023-02-16 01:30:39,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:39,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61071281] [2023-02-16 01:30:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:39,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:30:39,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:39,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61071281] [2023-02-16 01:30:39,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61071281] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:30:39,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:30:39,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 01:30:39,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057394408] [2023-02-16 01:30:39,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:30:39,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 01:30:39,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:39,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 01:30:39,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 01:30:39,051 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:39,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:39,066 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2023-02-16 01:30:39,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 01:30:39,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-16 01:30:39,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:39,067 INFO L225 Difference]: With dead ends: 28 [2023-02-16 01:30:39,068 INFO L226 Difference]: Without dead ends: 22 [2023-02-16 01:30:39,068 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 [2023-02-16 01:30:39,069 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:39,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:30:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-16 01:30:39,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-16 01:30:39,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:39,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2023-02-16 01:30:39,082 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 12 [2023-02-16 01:30:39,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:39,083 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2023-02-16 01:30:39,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:39,083 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2023-02-16 01:30:39,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 01:30:39,084 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:39,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:39,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 01:30:39,084 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:39,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:39,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1861241306, now seen corresponding path program 1 times [2023-02-16 01:30:39,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:39,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019462955] [2023-02-16 01:30:39,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:39,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:30:39,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:39,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019462955] [2023-02-16 01:30:39,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019462955] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:30:39,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:30:39,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 01:30:39,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70026889] [2023-02-16 01:30:39,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:30:39,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 01:30:39,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:39,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 01:30:39,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 01:30:39,117 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:39,134 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2023-02-16 01:30:39,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 01:30:39,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-16 01:30:39,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:39,135 INFO L225 Difference]: With dead ends: 37 [2023-02-16 01:30:39,135 INFO L226 Difference]: Without dead ends: 27 [2023-02-16 01:30:39,136 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 [2023-02-16 01:30:39,137 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:39,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 19 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:30:39,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-16 01:30:39,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-16 01:30:39,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2023-02-16 01:30:39,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2023-02-16 01:30:39,145 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 12 [2023-02-16 01:30:39,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:39,145 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2023-02-16 01:30:39,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:39,145 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2023-02-16 01:30:39,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-16 01:30:39,146 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:39,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:39,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 01:30:39,146 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:39,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:39,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1947191488, now seen corresponding path program 1 times [2023-02-16 01:30:39,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:39,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978095869] [2023-02-16 01:30:39,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:39,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:30:39,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:39,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978095869] [2023-02-16 01:30:39,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978095869] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:30:39,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:30:39,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 01:30:39,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560898442] [2023-02-16 01:30:39,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:30:39,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 01:30:39,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:39,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 01:30:39,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 01:30:39,198 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:39,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:39,233 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2023-02-16 01:30:39,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 01:30:39,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-16 01:30:39,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:39,234 INFO L225 Difference]: With dead ends: 34 [2023-02-16 01:30:39,234 INFO L226 Difference]: Without dead ends: 23 [2023-02-16 01:30:39,234 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 [2023-02-16 01:30:39,235 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 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 [2023-02-16 01:30:39,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:30:39,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-16 01:30:39,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-02-16 01:30:39,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 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) [2023-02-16 01:30:39,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2023-02-16 01:30:39,245 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 13 [2023-02-16 01:30:39,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:39,247 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2023-02-16 01:30:39,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:39,248 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2023-02-16 01:30:39,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-16 01:30:39,248 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:39,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:39,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-16 01:30:39,250 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:39,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:39,250 INFO L85 PathProgramCache]: Analyzing trace with hash 696660059, now seen corresponding path program 1 times [2023-02-16 01:30:39,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:39,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84490034] [2023-02-16 01:30:39,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:39,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:30:39,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:39,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84490034] [2023-02-16 01:30:39,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84490034] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:39,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192304368] [2023-02-16 01:30:39,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:39,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:39,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:39,370 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:30:39,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 01:30:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:39,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 01:30:39,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:30:39,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:30:39,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192304368] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:39,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:30:39,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2023-02-16 01:30:39,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39381480] [2023-02-16 01:30:39,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:30:39,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 01:30:39,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:39,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 01:30:39,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-16 01:30:39,478 INFO L87 Difference]: Start difference. First operand 23 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:39,495 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2023-02-16 01:30:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 01:30:39,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-16 01:30:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:39,496 INFO L225 Difference]: With dead ends: 29 [2023-02-16 01:30:39,496 INFO L226 Difference]: Without dead ends: 20 [2023-02-16 01:30:39,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-16 01:30:39,497 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:39,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 17 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:30:39,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-16 01:30:39,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-02-16 01:30:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:39,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2023-02-16 01:30:39,507 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 14 [2023-02-16 01:30:39,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:39,507 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2023-02-16 01:30:39,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:39,507 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2023-02-16 01:30:39,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-16 01:30:39,508 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:39,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:39,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 01:30:39,712 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 [2023-02-16 01:30:39,712 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:39,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:39,713 INFO L85 PathProgramCache]: Analyzing trace with hash 240273083, now seen corresponding path program 1 times [2023-02-16 01:30:39,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:39,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525919355] [2023-02-16 01:30:39,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:39,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:30:39,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:39,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525919355] [2023-02-16 01:30:39,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525919355] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:39,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035123297] [2023-02-16 01:30:39,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:39,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:39,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:39,819 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:30:39,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 01:30:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:39,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 01:30:39,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:30:39,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:30:39,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035123297] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:39,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:30:39,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 8 [2023-02-16 01:30:39,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921738662] [2023-02-16 01:30:39,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:30:39,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 01:30:39,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:39,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 01:30:39,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-16 01:30:39,904 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:39,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:39,933 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2023-02-16 01:30:39,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 01:30:39,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-16 01:30:39,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:39,934 INFO L225 Difference]: With dead ends: 24 [2023-02-16 01:30:39,934 INFO L226 Difference]: Without dead ends: 17 [2023-02-16 01:30:39,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-16 01:30:39,937 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:39,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:30:39,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-16 01:30:39,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-16 01:30:39,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:39,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-02-16 01:30:39,950 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 14 [2023-02-16 01:30:39,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:39,951 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-02-16 01:30:39,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:39,951 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-02-16 01:30:39,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-16 01:30:39,951 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:39,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:39,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-16 01:30:40,156 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 [2023-02-16 01:30:40,156 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:40,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:40,157 INFO L85 PathProgramCache]: Analyzing trace with hash -601796193, now seen corresponding path program 1 times [2023-02-16 01:30:40,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:40,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676004348] [2023-02-16 01:30:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:40,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:30:40,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:40,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676004348] [2023-02-16 01:30:40,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676004348] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:40,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823516773] [2023-02-16 01:30:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:40,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:40,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:40,266 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:30:40,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 01:30:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:40,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 01:30:40,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:30:40,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:30:40,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823516773] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:40,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:40,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-02-16 01:30:40,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727852418] [2023-02-16 01:30:40,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:40,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 01:30:40,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:40,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 01:30:40,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 01:30:40,352 INFO L87 Difference]: Start difference. First operand 17 states and 22 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) [2023-02-16 01:30:40,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:40,369 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2023-02-16 01:30:40,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 01:30:40,370 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 [2023-02-16 01:30:40,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:40,370 INFO L225 Difference]: With dead ends: 27 [2023-02-16 01:30:40,370 INFO L226 Difference]: Without dead ends: 21 [2023-02-16 01:30:40,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 01:30:40,371 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:40,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:30:40,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-16 01:30:40,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-16 01:30:40,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2023-02-16 01:30:40,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2023-02-16 01:30:40,375 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 15 [2023-02-16 01:30:40,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:40,375 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2023-02-16 01:30:40,375 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) [2023-02-16 01:30:40,375 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2023-02-16 01:30:40,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-16 01:30:40,376 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:40,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:40,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 01:30:40,581 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 [2023-02-16 01:30:40,581 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:40,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:40,581 INFO L85 PathProgramCache]: Analyzing trace with hash -556543664, now seen corresponding path program 1 times [2023-02-16 01:30:40,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:40,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472499550] [2023-02-16 01:30:40,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:40,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:30:40,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:40,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472499550] [2023-02-16 01:30:40,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472499550] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:40,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358310567] [2023-02-16 01:30:40,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:40,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:40,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:40,661 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:30:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:40,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 01:30:40,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-16 01:30:40,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:30:40,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:30:40,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358310567] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:40,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:40,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-02-16 01:30:40,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032527028] [2023-02-16 01:30:40,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:40,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-16 01:30:40,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:40,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-16 01:30:40,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-02-16 01:30:40,847 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2023-02-16 01:30:40,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:40,993 INFO L93 Difference]: Finished difference Result 66 states and 92 transitions. [2023-02-16 01:30:40,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-16 01:30:40,994 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 15 [2023-02-16 01:30:40,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:40,995 INFO L225 Difference]: With dead ends: 66 [2023-02-16 01:30:40,995 INFO L226 Difference]: Without dead ends: 49 [2023-02-16 01:30:40,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2023-02-16 01:30:40,996 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:40,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 57 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:30:40,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-16 01:30:41,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2023-02-16 01:30:41,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 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) [2023-02-16 01:30:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2023-02-16 01:30:41,004 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 15 [2023-02-16 01:30:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:41,004 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2023-02-16 01:30:41,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2023-02-16 01:30:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2023-02-16 01:30:41,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-16 01:30:41,005 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:41,005 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:41,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 01:30:41,209 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 [2023-02-16 01:30:41,210 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:41,210 INFO L85 PathProgramCache]: Analyzing trace with hash -806394657, now seen corresponding path program 1 times [2023-02-16 01:30:41,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:41,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043238878] [2023-02-16 01:30:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:41,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 01:30:41,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:41,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043238878] [2023-02-16 01:30:41,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043238878] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:41,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936701029] [2023-02-16 01:30:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:41,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:41,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:41,314 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:30:41,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 01:30:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:41,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 01:30:41,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 01:30:41,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 01:30:41,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936701029] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:41,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:41,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-02-16 01:30:41,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265839346] [2023-02-16 01:30:41,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:41,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 01:30:41,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:41,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 01:30:41,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 01:30:41,392 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:41,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:41,407 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2023-02-16 01:30:41,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 01:30:41,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2023-02-16 01:30:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:41,408 INFO L225 Difference]: With dead ends: 46 [2023-02-16 01:30:41,408 INFO L226 Difference]: Without dead ends: 28 [2023-02-16 01:30:41,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 01:30:41,408 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:41,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:30:41,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-16 01:30:41,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-16 01:30:41,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2023-02-16 01:30:41,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2023-02-16 01:30:41,414 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 17 [2023-02-16 01:30:41,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:41,414 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2023-02-16 01:30:41,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:41,414 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2023-02-16 01:30:41,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-16 01:30:41,414 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:41,414 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:41,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-16 01:30:41,618 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 [2023-02-16 01:30:41,618 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:41,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:41,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1535262302, now seen corresponding path program 2 times [2023-02-16 01:30:41,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:41,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526018198] [2023-02-16 01:30:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:41,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 01:30:41,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:41,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526018198] [2023-02-16 01:30:41,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526018198] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:41,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800104838] [2023-02-16 01:30:41,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:30:41,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:41,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:41,680 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:30:41,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 01:30:41,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:30:41,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:30:41,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-16 01:30:41,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 01:30:41,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 01:30:41,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800104838] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:41,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:41,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-02-16 01:30:41,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334463336] [2023-02-16 01:30:41,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:41,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 01:30:41,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:41,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 01:30:41,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:30:41,809 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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) [2023-02-16 01:30:42,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:42,019 INFO L93 Difference]: Finished difference Result 84 states and 115 transitions. [2023-02-16 01:30:42,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-16 01:30:42,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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 17 [2023-02-16 01:30:42,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:42,020 INFO L225 Difference]: With dead ends: 84 [2023-02-16 01:30:42,020 INFO L226 Difference]: Without dead ends: 61 [2023-02-16 01:30:42,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-02-16 01:30:42,021 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:42,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 90 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:30:42,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-16 01:30:42,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2023-02-16 01:30:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 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) [2023-02-16 01:30:42,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 63 transitions. [2023-02-16 01:30:42,031 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 63 transitions. Word has length 17 [2023-02-16 01:30:42,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:42,031 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 63 transitions. [2023-02-16 01:30:42,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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) [2023-02-16 01:30:42,032 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 63 transitions. [2023-02-16 01:30:42,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-16 01:30:42,035 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:42,036 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:42,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 01:30:42,236 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 [2023-02-16 01:30:42,236 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:42,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:42,237 INFO L85 PathProgramCache]: Analyzing trace with hash 750125673, now seen corresponding path program 2 times [2023-02-16 01:30:42,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:42,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889083792] [2023-02-16 01:30:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:42,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:30:42,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:42,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889083792] [2023-02-16 01:30:42,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889083792] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:42,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644937223] [2023-02-16 01:30:42,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:30:42,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:42,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:42,362 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:30:42,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 01:30:42,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:30:42,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:30:42,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-16 01:30:42,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 01:30:42,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 01:30:42,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644937223] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:42,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:42,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2023-02-16 01:30:42,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764276539] [2023-02-16 01:30:42,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:42,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 01:30:42,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:42,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 01:30:42,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-02-16 01:30:42,466 INFO L87 Difference]: Start difference. First operand 44 states and 63 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:42,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:42,773 INFO L93 Difference]: Finished difference Result 77 states and 112 transitions. [2023-02-16 01:30:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 01:30:42,774 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-16 01:30:42,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:42,774 INFO L225 Difference]: With dead ends: 77 [2023-02-16 01:30:42,774 INFO L226 Difference]: Without dead ends: 57 [2023-02-16 01:30:42,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2023-02-16 01:30:42,775 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:42,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 64 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:30:42,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-16 01:30:42,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2023-02-16 01:30:42,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.38) internal successors, (69), 50 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) [2023-02-16 01:30:42,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2023-02-16 01:30:42,791 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 18 [2023-02-16 01:30:42,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:42,791 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2023-02-16 01:30:42,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:42,791 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2023-02-16 01:30:42,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-16 01:30:42,792 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:42,792 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:42,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 01:30:42,996 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 [2023-02-16 01:30:42,997 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:42,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:42,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1913455152, now seen corresponding path program 3 times [2023-02-16 01:30:42,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:42,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411900560] [2023-02-16 01:30:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:42,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 01:30:43,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:43,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411900560] [2023-02-16 01:30:43,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411900560] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:43,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056159686] [2023-02-16 01:30:43,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:30:43,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:43,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:43,085 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:30:43,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 01:30:43,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-16 01:30:43,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:30:43,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-16 01:30:43,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 01:30:43,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 01:30:43,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056159686] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:43,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:43,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 19 [2023-02-16 01:30:43,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065437233] [2023-02-16 01:30:43,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:43,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-16 01:30:43,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:43,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-16 01:30:43,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-02-16 01:30:43,334 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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) [2023-02-16 01:30:44,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:44,223 INFO L93 Difference]: Finished difference Result 137 states and 189 transitions. [2023-02-16 01:30:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-16 01:30:44,224 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 19 [2023-02-16 01:30:44,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:44,224 INFO L225 Difference]: With dead ends: 137 [2023-02-16 01:30:44,224 INFO L226 Difference]: Without dead ends: 98 [2023-02-16 01:30:44,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=443, Invalid=2107, Unknown=0, NotChecked=0, Total=2550 [2023-02-16 01:30:44,226 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 75 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:44,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 199 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:30:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-16 01:30:44,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2023-02-16 01:30:44,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.4179104477611941) internal successors, (95), 67 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 95 transitions. [2023-02-16 01:30:44,241 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 95 transitions. Word has length 19 [2023-02-16 01:30:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:44,241 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 95 transitions. [2023-02-16 01:30:44,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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) [2023-02-16 01:30:44,241 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 95 transitions. [2023-02-16 01:30:44,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-16 01:30:44,242 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:44,242 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:44,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 01:30:44,447 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 [2023-02-16 01:30:44,448 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:44,448 INFO L85 PathProgramCache]: Analyzing trace with hash -92433222, now seen corresponding path program 4 times [2023-02-16 01:30:44,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:44,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998714224] [2023-02-16 01:30:44,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:44,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 01:30:44,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:44,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998714224] [2023-02-16 01:30:44,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998714224] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:44,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792584452] [2023-02-16 01:30:44,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:30:44,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:44,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:44,505 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:30:44,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 01:30:44,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:30:44,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:30:44,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-16 01:30:44,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 01:30:44,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 01:30:44,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792584452] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:44,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:44,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-02-16 01:30:44,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895190624] [2023-02-16 01:30:44,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:44,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 01:30:44,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:44,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 01:30:44,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 01:30:44,593 INFO L87 Difference]: Start difference. First operand 68 states and 95 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:44,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:44,636 INFO L93 Difference]: Finished difference Result 82 states and 112 transitions. [2023-02-16 01:30:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 01:30:44,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-16 01:30:44,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:44,637 INFO L225 Difference]: With dead ends: 82 [2023-02-16 01:30:44,637 INFO L226 Difference]: Without dead ends: 70 [2023-02-16 01:30:44,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-16 01:30:44,638 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:44,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 31 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:30:44,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-16 01:30:44,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-02-16 01:30:44,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.391304347826087) internal successors, (96), 69 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) [2023-02-16 01:30:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 96 transitions. [2023-02-16 01:30:44,653 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 96 transitions. Word has length 20 [2023-02-16 01:30:44,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:44,654 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 96 transitions. [2023-02-16 01:30:44,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:44,654 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 96 transitions. [2023-02-16 01:30:44,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-16 01:30:44,654 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:44,654 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:44,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 01:30:44,859 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 [2023-02-16 01:30:44,859 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:44,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:44,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1336926662, now seen corresponding path program 3 times [2023-02-16 01:30:44,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:44,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298472447] [2023-02-16 01:30:44,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:44,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:30:44,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:44,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298472447] [2023-02-16 01:30:44,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298472447] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:44,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118597487] [2023-02-16 01:30:44,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:30:44,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:44,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:44,984 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:30:45,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 01:30:45,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-16 01:30:45,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:30:45,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-16 01:30:45,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 01:30:45,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 01:30:45,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118597487] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:45,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:45,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2023-02-16 01:30:45,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668070193] [2023-02-16 01:30:45,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:45,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-16 01:30:45,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:45,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-16 01:30:45,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-02-16 01:30:45,087 INFO L87 Difference]: Start difference. First operand 70 states and 96 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:45,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:45,756 INFO L93 Difference]: Finished difference Result 164 states and 228 transitions. [2023-02-16 01:30:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-16 01:30:45,756 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-16 01:30:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:45,757 INFO L225 Difference]: With dead ends: 164 [2023-02-16 01:30:45,757 INFO L226 Difference]: Without dead ends: 136 [2023-02-16 01:30:45,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2023-02-16 01:30:45,758 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 134 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:45,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 181 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:30:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-16 01:30:45,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 93. [2023-02-16 01:30:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.3478260869565217) internal successors, (124), 92 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:45,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2023-02-16 01:30:45,776 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 124 transitions. Word has length 20 [2023-02-16 01:30:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:45,776 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 124 transitions. [2023-02-16 01:30:45,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:45,776 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 124 transitions. [2023-02-16 01:30:45,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-16 01:30:45,777 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:45,777 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:45,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 01:30:45,981 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 [2023-02-16 01:30:45,981 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:45,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:45,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1458344336, now seen corresponding path program 2 times [2023-02-16 01:30:45,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:45,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062723836] [2023-02-16 01:30:45,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:45,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:30:46,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:46,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062723836] [2023-02-16 01:30:46,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062723836] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:46,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543811097] [2023-02-16 01:30:46,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:30:46,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:46,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:46,103 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:30:46,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 01:30:46,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:30:46,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:30:46,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-16 01:30:46,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 01:30:46,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 01:30:46,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543811097] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:46,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:46,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2023-02-16 01:30:46,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751309370] [2023-02-16 01:30:46,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:46,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-16 01:30:46,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:46,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-16 01:30:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2023-02-16 01:30:46,209 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2023-02-16 01:30:47,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:47,001 INFO L93 Difference]: Finished difference Result 133 states and 181 transitions. [2023-02-16 01:30:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-16 01:30:47,002 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 21 [2023-02-16 01:30:47,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:47,003 INFO L225 Difference]: With dead ends: 133 [2023-02-16 01:30:47,003 INFO L226 Difference]: Without dead ends: 107 [2023-02-16 01:30:47,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=2708, Unknown=0, NotChecked=0, Total=3080 [2023-02-16 01:30:47,005 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 102 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:47,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 43 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:30:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-16 01:30:47,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2023-02-16 01:30:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.308641975308642) internal successors, (106), 81 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:47,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2023-02-16 01:30:47,026 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 21 [2023-02-16 01:30:47,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:47,026 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2023-02-16 01:30:47,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2023-02-16 01:30:47,027 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2023-02-16 01:30:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-16 01:30:47,029 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:47,030 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:47,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 01:30:47,234 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 [2023-02-16 01:30:47,234 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:47,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:47,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1455648122, now seen corresponding path program 5 times [2023-02-16 01:30:47,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:47,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818666513] [2023-02-16 01:30:47,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:47,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 01:30:47,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:47,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818666513] [2023-02-16 01:30:47,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818666513] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:47,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269409909] [2023-02-16 01:30:47,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:30:47,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:47,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:47,309 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:30:47,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 01:30:47,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-16 01:30:47,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:30:47,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-16 01:30:47,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 01:30:47,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 01:30:47,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269409909] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:47,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:47,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-02-16 01:30:47,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266265475] [2023-02-16 01:30:47,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:47,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 01:30:47,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:47,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 01:30:47,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 01:30:47,404 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:47,446 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2023-02-16 01:30:47,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 01:30:47,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-16 01:30:47,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:47,447 INFO L225 Difference]: With dead ends: 104 [2023-02-16 01:30:47,447 INFO L226 Difference]: Without dead ends: 80 [2023-02-16 01:30:47,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 01:30:47,448 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:47,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 37 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:30:47,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-16 01:30:47,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-02-16 01:30:47,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.3164556962025316) internal successors, (104), 79 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 104 transitions. [2023-02-16 01:30:47,466 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 104 transitions. Word has length 22 [2023-02-16 01:30:47,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:47,466 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 104 transitions. [2023-02-16 01:30:47,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:47,466 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 104 transitions. [2023-02-16 01:30:47,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-16 01:30:47,466 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:47,467 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:47,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 01:30:47,671 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 [2023-02-16 01:30:47,671 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:47,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:47,672 INFO L85 PathProgramCache]: Analyzing trace with hash 181444187, now seen corresponding path program 6 times [2023-02-16 01:30:47,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:47,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487114711] [2023-02-16 01:30:47,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:47,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 01:30:47,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:47,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487114711] [2023-02-16 01:30:47,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487114711] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:47,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141339534] [2023-02-16 01:30:47,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 01:30:47,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:47,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:47,792 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:30:47,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 01:30:47,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-16 01:30:47,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:30:47,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-16 01:30:47,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-16 01:30:47,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-16 01:30:47,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141339534] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:47,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:47,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 17 [2023-02-16 01:30:47,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315758502] [2023-02-16 01:30:47,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:47,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 01:30:47,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:47,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 01:30:47,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-02-16 01:30:47,906 INFO L87 Difference]: Start difference. First operand 80 states and 104 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:48,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:48,301 INFO L93 Difference]: Finished difference Result 206 states and 270 transitions. [2023-02-16 01:30:48,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-16 01:30:48,301 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-16 01:30:48,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:48,302 INFO L225 Difference]: With dead ends: 206 [2023-02-16 01:30:48,302 INFO L226 Difference]: Without dead ends: 173 [2023-02-16 01:30:48,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2023-02-16 01:30:48,304 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 129 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:48,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 342 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:30:48,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-16 01:30:48,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 83. [2023-02-16 01:30:48,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 82 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:48,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2023-02-16 01:30:48,345 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 22 [2023-02-16 01:30:48,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:48,345 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2023-02-16 01:30:48,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:48,345 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2023-02-16 01:30:48,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-16 01:30:48,346 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:48,346 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:48,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-16 01:30:48,557 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 [2023-02-16 01:30:48,559 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:48,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:48,559 INFO L85 PathProgramCache]: Analyzing trace with hash 534298912, now seen corresponding path program 3 times [2023-02-16 01:30:48,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:48,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340627245] [2023-02-16 01:30:48,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:48,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:48,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 01:30:48,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:48,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340627245] [2023-02-16 01:30:48,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340627245] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:48,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531506822] [2023-02-16 01:30:48,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:30:48,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:48,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:48,692 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) [2023-02-16 01:30:48,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 01:30:48,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-16 01:30:48,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:30:48,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-16 01:30:48,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 01:30:48,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 01:30:49,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531506822] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:49,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:49,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 26 [2023-02-16 01:30:49,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610883139] [2023-02-16 01:30:49,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:49,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-16 01:30:49,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:49,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-16 01:30:49,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2023-02-16 01:30:49,044 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2023-02-16 01:30:51,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:51,367 INFO L93 Difference]: Finished difference Result 227 states and 303 transitions. [2023-02-16 01:30:51,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-16 01:30:51,368 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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 23 [2023-02-16 01:30:51,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:51,368 INFO L225 Difference]: With dead ends: 227 [2023-02-16 01:30:51,368 INFO L226 Difference]: Without dead ends: 186 [2023-02-16 01:30:51,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=767, Invalid=5395, Unknown=0, NotChecked=0, Total=6162 [2023-02-16 01:30:51,370 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 141 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:51,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 450 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-16 01:30:51,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-02-16 01:30:51,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 107. [2023-02-16 01:30:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.3773584905660377) internal successors, (146), 106 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 146 transitions. [2023-02-16 01:30:51,409 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 146 transitions. Word has length 23 [2023-02-16 01:30:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:51,409 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 146 transitions. [2023-02-16 01:30:51,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2023-02-16 01:30:51,409 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 146 transitions. [2023-02-16 01:30:51,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-16 01:30:51,410 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:51,410 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:51,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-16 01:30:51,614 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 [2023-02-16 01:30:51,615 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:51,615 INFO L85 PathProgramCache]: Analyzing trace with hash -146134359, now seen corresponding path program 4 times [2023-02-16 01:30:51,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:51,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98479553] [2023-02-16 01:30:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:51,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:30:51,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:51,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98479553] [2023-02-16 01:30:51,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98479553] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:51,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094695709] [2023-02-16 01:30:51,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:30:51,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:51,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:51,763 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) [2023-02-16 01:30:51,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-16 01:30:51,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:30:51,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:30:51,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-16 01:30:51,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-16 01:30:51,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-16 01:30:51,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094695709] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:51,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:51,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2023-02-16 01:30:51,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202419659] [2023-02-16 01:30:51,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:51,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-16 01:30:51,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:51,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-16 01:30:51,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2023-02-16 01:30:51,918 INFO L87 Difference]: Start difference. First operand 107 states and 146 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2023-02-16 01:30:53,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:53,747 INFO L93 Difference]: Finished difference Result 212 states and 310 transitions. [2023-02-16 01:30:53,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-16 01:30:53,748 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-16 01:30:53,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:53,750 INFO L225 Difference]: With dead ends: 212 [2023-02-16 01:30:53,750 INFO L226 Difference]: Without dead ends: 181 [2023-02-16 01:30:53,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=572, Invalid=4398, Unknown=0, NotChecked=0, Total=4970 [2023-02-16 01:30:53,753 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 166 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:53,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 97 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 01:30:53,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-16 01:30:53,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 136. [2023-02-16 01:30:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.3555555555555556) internal successors, (183), 135 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:53,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 183 transitions. [2023-02-16 01:30:53,792 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 183 transitions. Word has length 24 [2023-02-16 01:30:53,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:53,793 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 183 transitions. [2023-02-16 01:30:53,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2023-02-16 01:30:53,793 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 183 transitions. [2023-02-16 01:30:53,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-16 01:30:53,793 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:53,793 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:53,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-16 01:30:53,997 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 [2023-02-16 01:30:53,998 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:53,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:53,998 INFO L85 PathProgramCache]: Analyzing trace with hash -703235457, now seen corresponding path program 7 times [2023-02-16 01:30:53,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:53,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286478243] [2023-02-16 01:30:53,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:53,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 01:30:54,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:54,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286478243] [2023-02-16 01:30:54,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286478243] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:54,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002735151] [2023-02-16 01:30:54,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 01:30:54,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:54,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:54,074 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) [2023-02-16 01:30:54,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-16 01:30:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:54,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-16 01:30:54,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 01:30:54,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 01:30:54,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002735151] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:54,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:54,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2023-02-16 01:30:54,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490537481] [2023-02-16 01:30:54,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:54,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 01:30:54,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:54,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 01:30:54,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 01:30:54,152 INFO L87 Difference]: Start difference. First operand 136 states and 183 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) [2023-02-16 01:30:54,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:54,248 INFO L93 Difference]: Finished difference Result 151 states and 202 transitions. [2023-02-16 01:30:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 01:30:54,248 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-16 01:30:54,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:54,249 INFO L225 Difference]: With dead ends: 151 [2023-02-16 01:30:54,249 INFO L226 Difference]: Without dead ends: 138 [2023-02-16 01:30:54,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-16 01:30:54,250 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:54,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:30:54,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-02-16 01:30:54,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2023-02-16 01:30:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.3430656934306568) internal successors, (184), 137 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 184 transitions. [2023-02-16 01:30:54,282 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 184 transitions. Word has length 25 [2023-02-16 01:30:54,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:54,282 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 184 transitions. [2023-02-16 01:30:54,282 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) [2023-02-16 01:30:54,282 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 184 transitions. [2023-02-16 01:30:54,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-16 01:30:54,283 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:54,283 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:54,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-16 01:30:54,487 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 [2023-02-16 01:30:54,487 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:54,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:54,488 INFO L85 PathProgramCache]: Analyzing trace with hash -779130386, now seen corresponding path program 4 times [2023-02-16 01:30:54,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:54,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058070600] [2023-02-16 01:30:54,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:54,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 01:30:54,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:54,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058070600] [2023-02-16 01:30:54,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058070600] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:54,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085679796] [2023-02-16 01:30:54,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:30:54,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:54,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:54,618 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) [2023-02-16 01:30:54,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-16 01:30:54,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:30:54,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:30:54,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-16 01:30:54,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 01:30:54,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-16 01:30:54,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085679796] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:54,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:54,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 22 [2023-02-16 01:30:54,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933647763] [2023-02-16 01:30:54,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:54,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-16 01:30:54,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:54,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-16 01:30:54,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-02-16 01:30:54,815 INFO L87 Difference]: Start difference. First operand 138 states and 184 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2023-02-16 01:30:55,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:55,993 INFO L93 Difference]: Finished difference Result 310 states and 409 transitions. [2023-02-16 01:30:55,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-16 01:30:55,994 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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 25 [2023-02-16 01:30:55,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:55,995 INFO L225 Difference]: With dead ends: 310 [2023-02-16 01:30:55,995 INFO L226 Difference]: Without dead ends: 244 [2023-02-16 01:30:55,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=318, Invalid=2438, Unknown=0, NotChecked=0, Total=2756 [2023-02-16 01:30:55,996 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 122 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:55,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 545 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 01:30:56,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-02-16 01:30:56,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 147. [2023-02-16 01:30:56,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.3150684931506849) internal successors, (192), 146 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:56,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 192 transitions. [2023-02-16 01:30:56,043 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 192 transitions. Word has length 25 [2023-02-16 01:30:56,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:56,043 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 192 transitions. [2023-02-16 01:30:56,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2023-02-16 01:30:56,043 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 192 transitions. [2023-02-16 01:30:56,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-16 01:30:56,046 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:56,047 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:56,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-16 01:30:56,253 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 [2023-02-16 01:30:56,254 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:56,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:56,254 INFO L85 PathProgramCache]: Analyzing trace with hash -2074329332, now seen corresponding path program 5 times [2023-02-16 01:30:56,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:56,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310821949] [2023-02-16 01:30:56,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:56,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 01:30:56,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:56,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310821949] [2023-02-16 01:30:56,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310821949] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:56,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334587796] [2023-02-16 01:30:56,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:30:56,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:56,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:56,389 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) [2023-02-16 01:30:56,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-16 01:30:56,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-16 01:30:56,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:30:56,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-16 01:30:56,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 01:30:56,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 01:30:56,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334587796] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:56,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:56,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2023-02-16 01:30:56,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245262223] [2023-02-16 01:30:56,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:56,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-16 01:30:56,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:56,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-16 01:30:56,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2023-02-16 01:30:56,631 INFO L87 Difference]: Start difference. First operand 147 states and 192 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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) [2023-02-16 01:30:57,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:57,743 INFO L93 Difference]: Finished difference Result 231 states and 300 transitions. [2023-02-16 01:30:57,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-16 01:30:57,745 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 26 [2023-02-16 01:30:57,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:57,746 INFO L225 Difference]: With dead ends: 231 [2023-02-16 01:30:57,746 INFO L226 Difference]: Without dead ends: 199 [2023-02-16 01:30:57,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=373, Invalid=2933, Unknown=0, NotChecked=0, Total=3306 [2023-02-16 01:30:57,747 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 141 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:57,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 170 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 01:30:57,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-02-16 01:30:57,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 142. [2023-02-16 01:30:57,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.3120567375886525) internal successors, (185), 141 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 185 transitions. [2023-02-16 01:30:57,790 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 185 transitions. Word has length 26 [2023-02-16 01:30:57,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:57,790 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 185 transitions. [2023-02-16 01:30:57,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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) [2023-02-16 01:30:57,790 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 185 transitions. [2023-02-16 01:30:57,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-16 01:30:57,791 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:57,791 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:57,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-16 01:30:57,999 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 [2023-02-16 01:30:57,999 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:58,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:58,000 INFO L85 PathProgramCache]: Analyzing trace with hash -318710337, now seen corresponding path program 8 times [2023-02-16 01:30:58,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:58,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428050937] [2023-02-16 01:30:58,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:58,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 01:30:58,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:58,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428050937] [2023-02-16 01:30:58,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428050937] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:58,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495588625] [2023-02-16 01:30:58,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:30:58,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:58,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:58,148 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) [2023-02-16 01:30:58,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-16 01:30:58,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:30:58,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:30:58,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-16 01:30:58,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 01:30:58,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 01:30:58,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495588625] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:58,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:58,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2023-02-16 01:30:58,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684137215] [2023-02-16 01:30:58,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:58,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 01:30:58,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:58,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 01:30:58,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 01:30:58,243 INFO L87 Difference]: Start difference. First operand 142 states and 185 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:58,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:58,302 INFO L93 Difference]: Finished difference Result 156 states and 203 transitions. [2023-02-16 01:30:58,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 01:30:58,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2023-02-16 01:30:58,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:58,303 INFO L225 Difference]: With dead ends: 156 [2023-02-16 01:30:58,303 INFO L226 Difference]: Without dead ends: 130 [2023-02-16 01:30:58,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 01:30:58,305 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:58,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 48 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:30:58,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-02-16 01:30:58,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2023-02-16 01:30:58,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.3255813953488371) internal successors, (171), 129 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:58,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 171 transitions. [2023-02-16 01:30:58,342 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 171 transitions. Word has length 27 [2023-02-16 01:30:58,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:58,342 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 171 transitions. [2023-02-16 01:30:58,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:58,342 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 171 transitions. [2023-02-16 01:30:58,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-16 01:30:58,343 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:58,343 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:58,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-16 01:30:58,548 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 [2023-02-16 01:30:58,549 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:58,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:58,549 INFO L85 PathProgramCache]: Analyzing trace with hash -831872481, now seen corresponding path program 5 times [2023-02-16 01:30:58,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:58,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378175907] [2023-02-16 01:30:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:58,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:30:58,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:58,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378175907] [2023-02-16 01:30:58,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378175907] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:58,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147351829] [2023-02-16 01:30:58,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:30:58,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:58,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:58,762 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) [2023-02-16 01:30:58,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-16 01:30:58,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-16 01:30:58,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:30:58,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-16 01:30:58,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:30:58,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 01:30:59,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147351829] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:59,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:59,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 13] total 33 [2023-02-16 01:30:59,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697078573] [2023-02-16 01:30:59,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:59,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-16 01:30:59,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:59,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-16 01:30:59,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 01:30:59,226 INFO L87 Difference]: Start difference. First operand 130 states and 171 transitions. Second operand has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 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) [2023-02-16 01:31:00,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:31:00,903 INFO L93 Difference]: Finished difference Result 309 states and 453 transitions. [2023-02-16 01:31:00,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-16 01:31:00,904 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 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 27 [2023-02-16 01:31:00,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:31:00,905 INFO L225 Difference]: With dead ends: 309 [2023-02-16 01:31:00,905 INFO L226 Difference]: Without dead ends: 276 [2023-02-16 01:31:00,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1508, Invalid=4812, Unknown=0, NotChecked=0, Total=6320 [2023-02-16 01:31:00,908 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 201 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 01:31:00,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 233 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 01:31:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-02-16 01:31:00,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 164. [2023-02-16 01:31:00,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.3742331288343559) internal successors, (224), 163 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:31:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 224 transitions. [2023-02-16 01:31:00,965 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 224 transitions. Word has length 27 [2023-02-16 01:31:00,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:31:00,965 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 224 transitions. [2023-02-16 01:31:00,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 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) [2023-02-16 01:31:00,966 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 224 transitions. [2023-02-16 01:31:00,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-16 01:31:00,975 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:31:00,975 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:31:00,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-16 01:31:01,180 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 [2023-02-16 01:31:01,180 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:31:01,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:31:01,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1297921274, now seen corresponding path program 6 times [2023-02-16 01:31:01,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:31:01,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536918970] [2023-02-16 01:31:01,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:31:01,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:31:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:31:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 01:31:01,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:31:01,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536918970] [2023-02-16 01:31:01,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536918970] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:31:01,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147670672] [2023-02-16 01:31:01,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 01:31:01,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:31:01,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:31:01,400 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) [2023-02-16 01:31:01,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-16 01:31:01,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-16 01:31:01,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:31:01,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-16 01:31:01,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:31:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 01:31:01,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:31:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-16 01:31:01,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147670672] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:31:01,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:31:01,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 8] total 26 [2023-02-16 01:31:01,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741356642] [2023-02-16 01:31:01,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:31:01,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-16 01:31:01,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:31:01,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-16 01:31:01,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2023-02-16 01:31:01,709 INFO L87 Difference]: Start difference. First operand 164 states and 224 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 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) [2023-02-16 01:31:02,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:31:02,523 INFO L93 Difference]: Finished difference Result 442 states and 581 transitions. [2023-02-16 01:31:02,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-16 01:31:02,524 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 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 [2023-02-16 01:31:02,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:31:02,527 INFO L225 Difference]: With dead ends: 442 [2023-02-16 01:31:02,528 INFO L226 Difference]: Without dead ends: 380 [2023-02-16 01:31:02,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=540, Invalid=1910, Unknown=0, NotChecked=0, Total=2450 [2023-02-16 01:31:02,529 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 219 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 01:31:02,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 640 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 01:31:02,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-02-16 01:31:02,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 174. [2023-02-16 01:31:02,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.346820809248555) internal successors, (233), 173 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:31:02,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 233 transitions. [2023-02-16 01:31:02,609 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 233 transitions. Word has length 28 [2023-02-16 01:31:02,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:31:02,609 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 233 transitions. [2023-02-16 01:31:02,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 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) [2023-02-16 01:31:02,609 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 233 transitions. [2023-02-16 01:31:02,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-16 01:31:02,610 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:31:02,610 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:31:02,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-16 01:31:02,815 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 [2023-02-16 01:31:02,815 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:31:02,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:31:02,815 INFO L85 PathProgramCache]: Analyzing trace with hash 10818656, now seen corresponding path program 9 times [2023-02-16 01:31:02,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:31:02,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137053840] [2023-02-16 01:31:02,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:31:02,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:31:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:31:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-16 01:31:02,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:31:02,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137053840] [2023-02-16 01:31:02,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137053840] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:31:02,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680227761] [2023-02-16 01:31:02,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:31:02,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:31:02,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:31:02,945 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) [2023-02-16 01:31:02,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-16 01:31:03,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-16 01:31:03,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:31:03,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-16 01:31:03,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:31:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-16 01:31:03,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:31:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-16 01:31:03,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680227761] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:31:03,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:31:03,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2023-02-16 01:31:03,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618095972] [2023-02-16 01:31:03,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:31:03,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-16 01:31:03,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:31:03,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-16 01:31:03,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-16 01:31:03,078 INFO L87 Difference]: Start difference. First operand 174 states and 233 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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) [2023-02-16 01:31:03,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:31:03,367 INFO L93 Difference]: Finished difference Result 363 states and 511 transitions. [2023-02-16 01:31:03,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-16 01:31:03,368 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 29 [2023-02-16 01:31:03,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:31:03,372 INFO L225 Difference]: With dead ends: 363 [2023-02-16 01:31:03,372 INFO L226 Difference]: Without dead ends: 326 [2023-02-16 01:31:03,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2023-02-16 01:31:03,374 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:31:03,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 82 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:31:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-02-16 01:31:03,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 265. [2023-02-16 01:31:03,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.3598484848484849) internal successors, (359), 264 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:31:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 359 transitions. [2023-02-16 01:31:03,448 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 359 transitions. Word has length 29 [2023-02-16 01:31:03,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:31:03,449 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 359 transitions. [2023-02-16 01:31:03,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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) [2023-02-16 01:31:03,449 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 359 transitions. [2023-02-16 01:31:03,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-16 01:31:03,450 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:31:03,450 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:31:03,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-16 01:31:03,654 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 [2023-02-16 01:31:03,655 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:31:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:31:03,655 INFO L85 PathProgramCache]: Analyzing trace with hash -274821952, now seen corresponding path program 6 times [2023-02-16 01:31:03,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:31:03,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849415930] [2023-02-16 01:31:03,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:31:03,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:31:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:31:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-16 01:31:03,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:31:03,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849415930] [2023-02-16 01:31:03,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849415930] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:31:03,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127737493] [2023-02-16 01:31:03,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 01:31:03,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:31:03,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:31:03,846 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) [2023-02-16 01:31:03,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-16 01:31:03,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-16 01:31:03,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:31:03,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-16 01:31:03,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:31:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-16 01:31:04,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:31:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-16 01:31:04,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127737493] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:31:04,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:31:04,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2023-02-16 01:31:04,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886028704] [2023-02-16 01:31:04,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:31:04,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-16 01:31:04,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:31:04,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-16 01:31:04,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2023-02-16 01:31:04,040 INFO L87 Difference]: Start difference. First operand 265 states and 359 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2023-02-16 01:31:05,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:31:05,918 INFO L93 Difference]: Finished difference Result 363 states and 472 transitions. [2023-02-16 01:31:05,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-16 01:31:05,919 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 31 [2023-02-16 01:31:05,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:31:05,920 INFO L225 Difference]: With dead ends: 363 [2023-02-16 01:31:05,920 INFO L226 Difference]: Without dead ends: 329 [2023-02-16 01:31:05,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=448, Invalid=3842, Unknown=0, NotChecked=0, Total=4290 [2023-02-16 01:31:05,921 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 101 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 01:31:05,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 361 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 01:31:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-02-16 01:31:05,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 275. [2023-02-16 01:31:05,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.354014598540146) internal successors, (371), 274 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:31:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 371 transitions. [2023-02-16 01:31:05,999 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 371 transitions. Word has length 31 [2023-02-16 01:31:05,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:31:06,000 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 371 transitions. [2023-02-16 01:31:06,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2023-02-16 01:31:06,000 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 371 transitions. [2023-02-16 01:31:06,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-16 01:31:06,000 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:31:06,001 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:31:06,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-02-16 01:31:06,205 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 [2023-02-16 01:31:06,206 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:31:06,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:31:06,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1305159664, now seen corresponding path program 10 times [2023-02-16 01:31:06,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:31:06,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361382469] [2023-02-16 01:31:06,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:31:06,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:31:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:31:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 01:31:06,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:31:06,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361382469] [2023-02-16 01:31:06,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361382469] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:31:06,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120056477] [2023-02-16 01:31:06,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:31:06,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:31:06,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:31:06,424 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) [2023-02-16 01:31:06,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-16 01:31:06,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:31:06,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:31:06,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 61 conjunts are in the unsatisfiable core [2023-02-16 01:31:06,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:31:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:31:06,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:31:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-16 01:31:07,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120056477] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:31:07,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:31:07,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23, 15] total 40 [2023-02-16 01:31:07,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824756084] [2023-02-16 01:31:07,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:31:07,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-16 01:31:07,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:31:07,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-16 01:31:07,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1270, Unknown=0, NotChecked=0, Total=1560 [2023-02-16 01:31:07,114 INFO L87 Difference]: Start difference. First operand 275 states and 371 transitions. Second operand has 40 states, 40 states have (on average 1.575) internal successors, (63), 40 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) [2023-02-16 01:31:11,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:31:11,705 INFO L93 Difference]: Finished difference Result 615 states and 831 transitions. [2023-02-16 01:31:11,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-02-16 01:31:11,705 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.575) internal successors, (63), 40 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 31 [2023-02-16 01:31:11,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:31:11,706 INFO L225 Difference]: With dead ends: 615 [2023-02-16 01:31:11,707 INFO L226 Difference]: Without dead ends: 523 [2023-02-16 01:31:11,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4183 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1762, Invalid=11348, Unknown=0, NotChecked=0, Total=13110 [2023-02-16 01:31:11,713 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 184 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-16 01:31:11,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 632 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-16 01:31:11,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2023-02-16 01:31:11,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 283. [2023-02-16 01:31:11,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.3971631205673758) internal successors, (394), 282 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) [2023-02-16 01:31:11,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 394 transitions. [2023-02-16 01:31:11,815 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 394 transitions. Word has length 31 [2023-02-16 01:31:11,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:31:11,815 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 394 transitions. [2023-02-16 01:31:11,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.575) internal successors, (63), 40 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) [2023-02-16 01:31:11,816 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 394 transitions. [2023-02-16 01:31:11,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-16 01:31:11,816 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:31:11,816 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:31:11,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-16 01:31:12,021 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 [2023-02-16 01:31:12,022 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:31:12,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:31:12,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1794921638, now seen corresponding path program 7 times [2023-02-16 01:31:12,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:31:12,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560630996] [2023-02-16 01:31:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:31:12,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:31:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:31:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 01:31:12,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:31:12,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560630996] [2023-02-16 01:31:12,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560630996] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:31:12,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954758901] [2023-02-16 01:31:12,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 01:31:12,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:31:12,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:31:12,313 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) [2023-02-16 01:31:12,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-16 01:31:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:31:12,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-16 01:31:12,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:31:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-16 01:31:12,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:31:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-16 01:31:12,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954758901] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:31:12,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:31:12,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2023-02-16 01:31:12,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359895555] [2023-02-16 01:31:12,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:31:12,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-16 01:31:12,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:31:12,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-16 01:31:12,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2023-02-16 01:31:12,529 INFO L87 Difference]: Start difference. First operand 283 states and 394 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:31:18,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:31:18,854 INFO L93 Difference]: Finished difference Result 492 states and 688 transitions. [2023-02-16 01:31:18,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-02-16 01:31:18,855 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-16 01:31:18,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:31:18,856 INFO L225 Difference]: With dead ends: 492 [2023-02-16 01:31:18,856 INFO L226 Difference]: Without dead ends: 419 [2023-02-16 01:31:18,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4024 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1189, Invalid=11921, Unknown=0, NotChecked=0, Total=13110 [2023-02-16 01:31:18,857 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 144 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-16 01:31:18,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 197 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-16 01:31:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-02-16 01:31:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 308. [2023-02-16 01:31:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.3583061889250814) internal successors, (417), 307 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:31:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 417 transitions. [2023-02-16 01:31:18,964 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 417 transitions. Word has length 32 [2023-02-16 01:31:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:31:18,965 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 417 transitions. [2023-02-16 01:31:18,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:31:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 417 transitions. [2023-02-16 01:31:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-16 01:31:18,966 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:31:18,966 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:31:18,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-16 01:31:19,171 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 [2023-02-16 01:31:19,171 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:31:19,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:31:19,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1362610571, now seen corresponding path program 8 times [2023-02-16 01:31:19,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:31:19,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614709636] [2023-02-16 01:31:19,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:31:19,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:31:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:31:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 01:31:19,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:31:19,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614709636] [2023-02-16 01:31:19,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614709636] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:31:19,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698371798] [2023-02-16 01:31:19,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:31:19,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:31:19,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:31:19,405 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) [2023-02-16 01:31:19,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-16 01:31:19,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:31:19,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:31:19,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-16 01:31:19,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:31:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 01:31:19,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:31:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-02-16 01:31:19,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698371798] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:31:19,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:31:19,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 10] total 29 [2023-02-16 01:31:19,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221364631] [2023-02-16 01:31:19,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:31:19,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-16 01:31:19,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:31:19,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-16 01:31:19,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-02-16 01:31:19,707 INFO L87 Difference]: Start difference. First operand 308 states and 417 transitions. Second operand has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:31:22,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:31:22,610 INFO L93 Difference]: Finished difference Result 665 states and 885 transitions. [2023-02-16 01:31:22,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-02-16 01:31:22,610 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 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 [2023-02-16 01:31:22,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:31:22,612 INFO L225 Difference]: With dead ends: 665 [2023-02-16 01:31:22,612 INFO L226 Difference]: Without dead ends: 562 [2023-02-16 01:31:22,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=599, Invalid=6373, Unknown=0, NotChecked=0, Total=6972 [2023-02-16 01:31:22,613 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 149 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1379 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 01:31:22,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 1004 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1379 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 01:31:22,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2023-02-16 01:31:22,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 351. [2023-02-16 01:31:22,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.3142857142857143) internal successors, (460), 350 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:31:22,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 460 transitions. [2023-02-16 01:31:22,743 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 460 transitions. Word has length 32 [2023-02-16 01:31:22,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:31:22,743 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 460 transitions. [2023-02-16 01:31:22,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:31:22,744 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 460 transitions. [2023-02-16 01:31:22,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-16 01:31:22,744 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:31:22,744 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:31:22,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-16 01:31:22,949 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 [2023-02-16 01:31:22,949 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:31:22,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:31:22,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1110124709, now seen corresponding path program 7 times [2023-02-16 01:31:22,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:31:22,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736057680] [2023-02-16 01:31:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:31:22,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:31:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:31:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-16 01:31:23,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:31:23,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736057680] [2023-02-16 01:31:23,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736057680] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:31:23,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835034494] [2023-02-16 01:31:23,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 01:31:23,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:31:23,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:31:23,259 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) [2023-02-16 01:31:23,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-16 01:31:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:31:23,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-16 01:31:23,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:31:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-16 01:31:23,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:31:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-16 01:31:23,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835034494] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:31:23,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:31:23,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 42 [2023-02-16 01:31:23,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865266839] [2023-02-16 01:31:23,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:31:23,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-16 01:31:23,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:31:23,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-16 01:31:23,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2023-02-16 01:31:23,884 INFO L87 Difference]: Start difference. First operand 351 states and 460 transitions. Second operand has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 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) [2023-02-16 01:31:45,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:31:45,262 INFO L93 Difference]: Finished difference Result 1283 states and 1710 transitions. [2023-02-16 01:31:45,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2023-02-16 01:31:45,262 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 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 34 [2023-02-16 01:31:45,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:31:45,265 INFO L225 Difference]: With dead ends: 1283 [2023-02-16 01:31:45,265 INFO L226 Difference]: Without dead ends: 1138 [2023-02-16 01:31:45,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27684 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=7560, Invalid=61872, Unknown=0, NotChecked=0, Total=69432 [2023-02-16 01:31:45,285 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1044 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 1105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1044 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 3287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1105 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:31:45,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1044 Valid, 582 Invalid, 3287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1105 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-02-16 01:31:45,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2023-02-16 01:31:45,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 578. [2023-02-16 01:31:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 1.339688041594454) internal successors, (773), 577 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:31:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 773 transitions. [2023-02-16 01:31:45,497 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 773 transitions. Word has length 34 [2023-02-16 01:31:45,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:31:45,498 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 773 transitions. [2023-02-16 01:31:45,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 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) [2023-02-16 01:31:45,498 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 773 transitions. [2023-02-16 01:31:45,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-16 01:31:45,500 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:31:45,500 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:31:45,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-16 01:31:45,706 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 [2023-02-16 01:31:45,706 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:31:45,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:31:45,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1926632609, now seen corresponding path program 11 times [2023-02-16 01:31:45,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:31:45,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342162331] [2023-02-16 01:31:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:31:45,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:31:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:31:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-16 01:31:45,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:31:45,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342162331] [2023-02-16 01:31:45,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342162331] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:31:45,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770702196] [2023-02-16 01:31:45,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:31:45,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:31:45,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:31:45,871 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) [2023-02-16 01:31:45,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-16 01:31:46,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-16 01:31:46,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:31:46,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-16 01:31:46,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:31:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-16 01:31:46,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:31:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-16 01:31:46,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770702196] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:31:46,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:31:46,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-02-16 01:31:46,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902450992] [2023-02-16 01:31:46,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:31:46,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 01:31:46,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:31:46,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 01:31:46,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:31:46,300 INFO L87 Difference]: Start difference. First operand 578 states and 773 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2023-02-16 01:31:47,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:31:47,209 INFO L93 Difference]: Finished difference Result 835 states and 1141 transitions. [2023-02-16 01:31:47,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-16 01:31:47,210 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 35 [2023-02-16 01:31:47,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:31:47,212 INFO L225 Difference]: With dead ends: 835 [2023-02-16 01:31:47,212 INFO L226 Difference]: Without dead ends: 791 [2023-02-16 01:31:47,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=580, Unknown=0, NotChecked=0, Total=812 [2023-02-16 01:31:47,213 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 118 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:31:47,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 72 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:31:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2023-02-16 01:31:47,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 710. [2023-02-16 01:31:47,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 1.370944992947814) internal successors, (972), 709 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:31:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 972 transitions. [2023-02-16 01:31:47,574 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 972 transitions. Word has length 35 [2023-02-16 01:31:47,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:31:47,575 INFO L495 AbstractCegarLoop]: Abstraction has 710 states and 972 transitions. [2023-02-16 01:31:47,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2023-02-16 01:31:47,575 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 972 transitions. [2023-02-16 01:31:47,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-16 01:31:47,576 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:31:47,576 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:31:47,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-16 01:31:47,781 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 [2023-02-16 01:31:47,782 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:31:47,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:31:47,782 INFO L85 PathProgramCache]: Analyzing trace with hash 61699326, now seen corresponding path program 12 times [2023-02-16 01:31:47,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:31:47,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866398786] [2023-02-16 01:31:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:31:47,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:31:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:31:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 01:31:48,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:31:48,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866398786] [2023-02-16 01:31:48,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866398786] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:31:48,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367911564] [2023-02-16 01:31:48,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 01:31:48,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:31:48,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:31:48,061 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) [2023-02-16 01:31:48,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-16 01:31:48,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-16 01:31:48,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:31:48,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-16 01:31:48,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:31:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-02-16 01:31:48,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:31:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-02-16 01:31:48,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367911564] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:31:48,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:31:48,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 7] total 28 [2023-02-16 01:31:48,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794057557] [2023-02-16 01:31:48,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:31:48,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-16 01:31:48,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:31:48,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-16 01:31:48,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=695, Unknown=0, NotChecked=0, Total=756 [2023-02-16 01:31:48,357 INFO L87 Difference]: Start difference. First operand 710 states and 972 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2023-02-16 01:31:50,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:31:50,193 INFO L93 Difference]: Finished difference Result 1109 states and 1493 transitions. [2023-02-16 01:31:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-16 01:31:50,194 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 35 [2023-02-16 01:31:50,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:31:50,196 INFO L225 Difference]: With dead ends: 1109 [2023-02-16 01:31:50,196 INFO L226 Difference]: Without dead ends: 1036 [2023-02-16 01:31:50,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=2473, Unknown=0, NotChecked=0, Total=2652 [2023-02-16 01:31:50,197 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 133 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1478 SdHoareTripleChecker+Invalid, 2432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-16 01:31:50,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 1478 Invalid, 2432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2385 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-16 01:31:50,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2023-02-16 01:31:50,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 659. [2023-02-16 01:31:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 1.4072948328267476) internal successors, (926), 658 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:31:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 926 transitions. [2023-02-16 01:31:50,525 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 926 transitions. Word has length 35 [2023-02-16 01:31:50,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:31:50,526 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 926 transitions. [2023-02-16 01:31:50,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2023-02-16 01:31:50,526 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 926 transitions. [2023-02-16 01:31:50,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-16 01:31:50,527 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:31:50,527 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:31:50,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-16 01:31:50,732 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 [2023-02-16 01:31:50,732 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:31:50,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:31:50,733 INFO L85 PathProgramCache]: Analyzing trace with hash 63327017, now seen corresponding path program 8 times [2023-02-16 01:31:50,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:31:50,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923909754] [2023-02-16 01:31:50,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:31:50,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:31:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:31:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:31:51,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:31:51,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923909754] [2023-02-16 01:31:51,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923909754] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:31:51,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973694578] [2023-02-16 01:31:51,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:31:51,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:31:51,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:31:51,048 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) [2023-02-16 01:31:51,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-16 01:31:51,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:31:51,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:31:51,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-16 01:31:51,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:31:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-16 01:31:51,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:31:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-16 01:31:51,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973694578] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:31:51,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:31:51,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2023-02-16 01:31:51,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230051509] [2023-02-16 01:31:51,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:31:51,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-16 01:31:51,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:31:51,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-16 01:31:51,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2023-02-16 01:31:51,294 INFO L87 Difference]: Start difference. First operand 659 states and 926 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:32:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:32:40,246 INFO L93 Difference]: Finished difference Result 998 states and 1412 transitions. [2023-02-16 01:32:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-02-16 01:32:40,246 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-16 01:32:40,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:32:40,248 INFO L225 Difference]: With dead ends: 998 [2023-02-16 01:32:40,248 INFO L226 Difference]: Without dead ends: 892 [2023-02-16 01:32:40,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9366 ImplicationChecksByTransitivity, 44.8s TimeCoverageRelationStatistics Valid=2219, Invalid=25837, Unknown=0, NotChecked=0, Total=28056 [2023-02-16 01:32:40,250 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 282 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 3088 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 3325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 3088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-02-16 01:32:40,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 257 Invalid, 3325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 3088 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-02-16 01:32:40,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2023-02-16 01:32:40,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 635. [2023-02-16 01:32:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.3943217665615142) internal successors, (884), 634 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:32:40,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 884 transitions. [2023-02-16 01:32:40,599 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 884 transitions. Word has length 36 [2023-02-16 01:32:40,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:32:40,599 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 884 transitions. [2023-02-16 01:32:40,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:32:40,600 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 884 transitions. [2023-02-16 01:32:40,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-16 01:32:40,601 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:32:40,601 INFO L195 NwaCegarLoop]: trace histogram [13, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:32:40,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-02-16 01:32:40,805 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 [2023-02-16 01:32:40,805 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:32:40,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:32:40,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1172474864, now seen corresponding path program 13 times [2023-02-16 01:32:40,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:32:40,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353624006] [2023-02-16 01:32:40,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:32:40,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:32:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:32:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-16 01:32:41,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:32:41,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353624006] [2023-02-16 01:32:41,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353624006] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:32:41,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081726955] [2023-02-16 01:32:41,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 01:32:41,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:32:41,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:32:41,098 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) [2023-02-16 01:32:41,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-16 01:32:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:32:41,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-16 01:32:41,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:32:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:32:41,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:32:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-16 01:32:41,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081726955] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:32:41,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:32:41,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29, 17] total 48 [2023-02-16 01:32:41,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162552487] [2023-02-16 01:32:41,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:32:41,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-16 01:32:41,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:32:41,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-16 01:32:41,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1889, Unknown=0, NotChecked=0, Total=2256 [2023-02-16 01:32:41,960 INFO L87 Difference]: Start difference. First operand 635 states and 884 transitions. Second operand has 48 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 48 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:32:52,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:32:52,184 INFO L93 Difference]: Finished difference Result 1115 states and 1514 transitions. [2023-02-16 01:32:52,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-02-16 01:32:52,185 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 48 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2023-02-16 01:32:52,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:32:52,187 INFO L225 Difference]: With dead ends: 1115 [2023-02-16 01:32:52,187 INFO L226 Difference]: Without dead ends: 911 [2023-02-16 01:32:52,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6479 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2321, Invalid=18271, Unknown=0, NotChecked=0, Total=20592 [2023-02-16 01:32:52,188 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 215 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 3016 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 3566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 3016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-16 01:32:52,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 1564 Invalid, 3566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 3016 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-16 01:32:52,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2023-02-16 01:32:52,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 585. [2023-02-16 01:32:52,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 1.3921232876712328) internal successors, (813), 584 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:32:52,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 813 transitions. [2023-02-16 01:32:52,538 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 813 transitions. Word has length 37 [2023-02-16 01:32:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:32:52,538 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 813 transitions. [2023-02-16 01:32:52,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 48 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:32:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 813 transitions. [2023-02-16 01:32:52,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-16 01:32:52,539 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:32:52,540 INFO L195 NwaCegarLoop]: trace histogram [14, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:32:52,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-16 01:32:52,744 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 [2023-02-16 01:32:52,744 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:32:52,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:32:52,745 INFO L85 PathProgramCache]: Analyzing trace with hash 727017961, now seen corresponding path program 9 times [2023-02-16 01:32:52,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:32:52,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938209200] [2023-02-16 01:32:52,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:32:52,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:32:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:32:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-16 01:32:53,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:32:53,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938209200] [2023-02-16 01:32:53,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938209200] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:32:53,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834510578] [2023-02-16 01:32:53,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:32:53,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:32:53,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:32:53,098 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) [2023-02-16 01:32:53,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-16 01:32:53,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-16 01:32:53,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:32:53,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-16 01:32:53,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:32:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-02-16 01:32:53,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:32:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-02-16 01:32:53,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834510578] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:32:53,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:32:53,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 37 [2023-02-16 01:32:53,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992447072] [2023-02-16 01:32:53,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:32:53,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-16 01:32:53,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:32:53,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-16 01:32:53,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2023-02-16 01:32:53,607 INFO L87 Difference]: Start difference. First operand 585 states and 813 transitions. Second operand has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:33:04,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:33:04,696 INFO L93 Difference]: Finished difference Result 1088 states and 1474 transitions. [2023-02-16 01:33:04,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2023-02-16 01:33:04,705 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-16 01:33:04,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:33:04,707 INFO L225 Difference]: With dead ends: 1088 [2023-02-16 01:33:04,707 INFO L226 Difference]: Without dead ends: 847 [2023-02-16 01:33:04,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10188 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1673, Invalid=30547, Unknown=0, NotChecked=0, Total=32220 [2023-02-16 01:33:04,714 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 263 mSDsluCounter, 1732 mSDsCounter, 0 mSdLazyCounter, 3884 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 4205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 3884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-16 01:33:04,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 1817 Invalid, 4205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 3884 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-16 01:33:04,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2023-02-16 01:33:05,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 548. [2023-02-16 01:33:05,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.340036563071298) internal successors, (733), 547 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:33:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 733 transitions. [2023-02-16 01:33:05,070 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 733 transitions. Word has length 38 [2023-02-16 01:33:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:33:05,071 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 733 transitions. [2023-02-16 01:33:05,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:33:05,071 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 733 transitions. [2023-02-16 01:33:05,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-16 01:33:05,072 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:33:05,072 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:33:05,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-02-16 01:33:05,276 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 [2023-02-16 01:33:05,277 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:33:05,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:33:05,277 INFO L85 PathProgramCache]: Analyzing trace with hash 378745503, now seen corresponding path program 9 times [2023-02-16 01:33:05,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:33:05,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315496632] [2023-02-16 01:33:05,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:33:05,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:33:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:33:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:33:05,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:33:05,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315496632] [2023-02-16 01:33:05,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315496632] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:33:05,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866779583] [2023-02-16 01:33:05,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:33:05,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:33:05,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:33:05,666 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) [2023-02-16 01:33:05,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-16 01:33:05,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-16 01:33:05,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:33:05,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-16 01:33:05,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:33:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:33:06,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:33:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-16 01:33:06,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866779583] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:33:06,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:33:06,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 31, 21] total 53 [2023-02-16 01:33:06,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164437237] [2023-02-16 01:33:06,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:33:06,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-16 01:33:06,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:33:06,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-16 01:33:06,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2215, Unknown=0, NotChecked=0, Total=2756 [2023-02-16 01:33:06,893 INFO L87 Difference]: Start difference. First operand 548 states and 733 transitions. Second operand has 53 states, 53 states have (on average 1.528301886792453) internal successors, (81), 53 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) [2023-02-16 01:33:19,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:33:19,247 INFO L93 Difference]: Finished difference Result 1112 states and 1593 transitions. [2023-02-16 01:33:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2023-02-16 01:33:19,247 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.528301886792453) internal successors, (81), 53 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 39 [2023-02-16 01:33:19,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:33:19,250 INFO L225 Difference]: With dead ends: 1112 [2023-02-16 01:33:19,250 INFO L226 Difference]: Without dead ends: 1026 [2023-02-16 01:33:19,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=6698, Invalid=24102, Unknown=0, NotChecked=0, Total=30800 [2023-02-16 01:33:19,257 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 465 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 4577 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 5011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 4577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:33:19,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 800 Invalid, 5011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 4577 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-02-16 01:33:19,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2023-02-16 01:33:19,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 568. [2023-02-16 01:33:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 1.3544973544973544) internal successors, (768), 567 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:33:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 768 transitions. [2023-02-16 01:33:19,637 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 768 transitions. Word has length 39 [2023-02-16 01:33:19,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:33:19,637 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 768 transitions. [2023-02-16 01:33:19,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.528301886792453) internal successors, (81), 53 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) [2023-02-16 01:33:19,638 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 768 transitions. [2023-02-16 01:33:19,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-16 01:33:19,639 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:33:19,639 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:33:19,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-16 01:33:19,843 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 [2023-02-16 01:33:19,844 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:33:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:33:19,844 INFO L85 PathProgramCache]: Analyzing trace with hash -716397574, now seen corresponding path program 14 times [2023-02-16 01:33:19,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:33:19,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746908626] [2023-02-16 01:33:19,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:33:19,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:33:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:33:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-16 01:33:19,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:33:19,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746908626] [2023-02-16 01:33:19,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746908626] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:33:19,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422081433] [2023-02-16 01:33:19,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:33:19,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:33:19,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:33:19,989 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) [2023-02-16 01:33:19,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-16 01:33:20,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:33:20,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:33:20,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-16 01:33:20,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:33:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-16 01:33:20,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:33:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-16 01:33:20,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422081433] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:33:20,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:33:20,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2023-02-16 01:33:20,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010344851] [2023-02-16 01:33:20,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:33:20,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 01:33:20,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:33:20,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 01:33:20,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-16 01:33:20,114 INFO L87 Difference]: Start difference. First operand 568 states and 768 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2023-02-16 01:33:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:33:20,916 INFO L93 Difference]: Finished difference Result 621 states and 833 transitions. [2023-02-16 01:33:20,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-16 01:33:20,916 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-16 01:33:20,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:33:20,918 INFO L225 Difference]: With dead ends: 621 [2023-02-16 01:33:20,918 INFO L226 Difference]: Without dead ends: 603 [2023-02-16 01:33:20,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2023-02-16 01:33:20,919 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:33:20,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 85 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:33:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2023-02-16 01:33:21,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 583. [2023-02-16 01:33:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 1.3556701030927836) internal successors, (789), 582 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:33:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 789 transitions. [2023-02-16 01:33:21,315 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 789 transitions. Word has length 40 [2023-02-16 01:33:21,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:33:21,315 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 789 transitions. [2023-02-16 01:33:21,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2023-02-16 01:33:21,315 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 789 transitions. [2023-02-16 01:33:21,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-16 01:33:21,317 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:33:21,317 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:33:21,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-16 01:33:21,521 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 [2023-02-16 01:33:21,522 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:33:21,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:33:21,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1415796679, now seen corresponding path program 15 times [2023-02-16 01:33:21,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:33:21,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801036586] [2023-02-16 01:33:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:33:21,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:33:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:33:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-16 01:33:21,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:33:21,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801036586] [2023-02-16 01:33:21,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801036586] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:33:21,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113559359] [2023-02-16 01:33:21,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:33:21,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:33:21,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:33:21,843 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) [2023-02-16 01:33:21,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-16 01:33:21,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-16 01:33:21,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:33:21,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-16 01:33:21,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:33:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-02-16 01:33:22,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:33:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-16 01:33:22,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113559359] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:33:22,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:33:22,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 18] total 46 [2023-02-16 01:33:22,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581204157] [2023-02-16 01:33:22,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:33:22,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-16 01:33:22,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:33:22,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-16 01:33:22,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1891, Unknown=0, NotChecked=0, Total=2070 [2023-02-16 01:33:22,767 INFO L87 Difference]: Start difference. First operand 583 states and 789 transitions. Second operand has 46 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 46 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) [2023-02-16 01:33:47,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:33:47,675 INFO L93 Difference]: Finished difference Result 1163 states and 1569 transitions. [2023-02-16 01:33:47,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2023-02-16 01:33:47,675 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 46 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 40 [2023-02-16 01:33:47,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:33:47,677 INFO L225 Difference]: With dead ends: 1163 [2023-02-16 01:33:47,677 INFO L226 Difference]: Without dead ends: 949 [2023-02-16 01:33:47,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15449 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=3975, Invalid=44645, Unknown=0, NotChecked=0, Total=48620 [2023-02-16 01:33:47,679 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 297 mSDsluCounter, 2240 mSDsCounter, 0 mSdLazyCounter, 5086 mSolverCounterSat, 978 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 2325 SdHoareTripleChecker+Invalid, 6064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 978 IncrementalHoareTripleChecker+Valid, 5086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:33:47,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 2325 Invalid, 6064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [978 Valid, 5086 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-02-16 01:33:47,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2023-02-16 01:33:48,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 548. [2023-02-16 01:33:48,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.3802559414990858) internal successors, (755), 547 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:33:48,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 755 transitions. [2023-02-16 01:33:48,099 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 755 transitions. Word has length 40 [2023-02-16 01:33:48,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:33:48,099 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 755 transitions. [2023-02-16 01:33:48,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 46 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) [2023-02-16 01:33:48,100 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 755 transitions. [2023-02-16 01:33:48,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-16 01:33:48,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:33:48,102 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:33:48,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-02-16 01:33:48,306 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 [2023-02-16 01:33:48,307 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:33:48,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:33:48,307 INFO L85 PathProgramCache]: Analyzing trace with hash -645736768, now seen corresponding path program 16 times [2023-02-16 01:33:48,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:33:48,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937998889] [2023-02-16 01:33:48,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:33:48,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:33:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:33:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-16 01:33:48,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:33:48,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937998889] [2023-02-16 01:33:48,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937998889] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:33:48,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846041257] [2023-02-16 01:33:48,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:33:48,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:33:48,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:33:48,741 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) [2023-02-16 01:33:48,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-16 01:33:48,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:33:48,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:33:48,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-16 01:33:48,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:33:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:33:49,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:33:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-02-16 01:33:49,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846041257] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:33:49,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:33:49,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 32, 17] total 52 [2023-02-16 01:33:49,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309286411] [2023-02-16 01:33:49,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:33:49,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-16 01:33:49,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:33:49,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-16 01:33:49,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2265, Unknown=0, NotChecked=0, Total=2652 [2023-02-16 01:33:49,628 INFO L87 Difference]: Start difference. First operand 548 states and 755 transitions. Second operand has 52 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 52 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) [2023-02-16 01:34:06,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:34:06,248 INFO L93 Difference]: Finished difference Result 1385 states and 1901 transitions. [2023-02-16 01:34:06,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2023-02-16 01:34:06,248 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 52 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) Word has length 41 [2023-02-16 01:34:06,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:34:06,251 INFO L225 Difference]: With dead ends: 1385 [2023-02-16 01:34:06,251 INFO L226 Difference]: Without dead ends: 1204 [2023-02-16 01:34:06,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16284 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=4109, Invalid=41901, Unknown=0, NotChecked=0, Total=46010 [2023-02-16 01:34:06,267 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 326 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 5293 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 6085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 5293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:34:06,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 1704 Invalid, 6085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 5293 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-02-16 01:34:06,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2023-02-16 01:34:06,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 635. [2023-02-16 01:34:06,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.3675078864353312) internal successors, (867), 634 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:34:06,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 867 transitions. [2023-02-16 01:34:06,822 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 867 transitions. Word has length 41 [2023-02-16 01:34:06,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:34:06,822 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 867 transitions. [2023-02-16 01:34:06,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 52 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) [2023-02-16 01:34:06,822 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 867 transitions. [2023-02-16 01:34:06,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-16 01:34:06,841 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:34:06,841 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:34:06,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-02-16 01:34:07,050 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 [2023-02-16 01:34:07,050 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:34:07,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:34:07,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1331192646, now seen corresponding path program 17 times [2023-02-16 01:34:07,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:34:07,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82210143] [2023-02-16 01:34:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:34:07,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:34:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:34:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-16 01:34:07,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:34:07,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82210143] [2023-02-16 01:34:07,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82210143] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:34:07,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391578140] [2023-02-16 01:34:07,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:34:07,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:34:07,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:34:07,237 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) [2023-02-16 01:34:07,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-16 01:34:08,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-16 01:34:08,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:34:08,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-16 01:34:08,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:34:08,704 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-16 01:34:08,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:34:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-16 01:34:08,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391578140] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:34:08,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:34:08,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 18 [2023-02-16 01:34:08,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26842396] [2023-02-16 01:34:08,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:34:08,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-16 01:34:08,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:34:08,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-16 01:34:08,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-02-16 01:34:08,842 INFO L87 Difference]: Start difference. First operand 635 states and 867 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2023-02-16 01:34:11,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:34:11,814 INFO L93 Difference]: Finished difference Result 961 states and 1385 transitions. [2023-02-16 01:34:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-16 01:34:11,815 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 42 [2023-02-16 01:34:11,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:34:11,817 INFO L225 Difference]: With dead ends: 961 [2023-02-16 01:34:11,817 INFO L226 Difference]: Without dead ends: 904 [2023-02-16 01:34:11,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=521, Invalid=1459, Unknown=0, NotChecked=0, Total=1980 [2023-02-16 01:34:11,818 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 107 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 01:34:11,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 192 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 01:34:11,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2023-02-16 01:34:12,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 849. [2023-02-16 01:34:12,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 1.446933962264151) internal successors, (1227), 848 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:34:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1227 transitions. [2023-02-16 01:34:12,438 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1227 transitions. Word has length 42 [2023-02-16 01:34:12,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:34:12,439 INFO L495 AbstractCegarLoop]: Abstraction has 849 states and 1227 transitions. [2023-02-16 01:34:12,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2023-02-16 01:34:12,439 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1227 transitions. [2023-02-16 01:34:12,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-16 01:34:12,440 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:34:12,440 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:34:12,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-02-16 01:34:12,645 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 [2023-02-16 01:34:12,645 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:34:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:34:12,645 INFO L85 PathProgramCache]: Analyzing trace with hash -559004823, now seen corresponding path program 10 times [2023-02-16 01:34:12,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:34:12,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934836022] [2023-02-16 01:34:12,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:34:12,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:34:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:34:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:34:13,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:34:13,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934836022] [2023-02-16 01:34:13,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934836022] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:34:13,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033652677] [2023-02-16 01:34:13,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:34:13,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:34:13,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:34:13,072 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) [2023-02-16 01:34:13,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-02-16 01:34:13,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:34:13,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:34:13,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-16 01:34:13,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:34:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-16 01:34:13,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:34:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-16 01:34:13,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033652677] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:34:13,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:34:13,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 13] total 36 [2023-02-16 01:34:13,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538007745] [2023-02-16 01:34:13,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:34:13,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-16 01:34:13,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:34:13,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-16 01:34:13,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2023-02-16 01:34:13,377 INFO L87 Difference]: Start difference. First operand 849 states and 1227 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)