./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label51.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/eca-rers2012/Problem17_label51.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 92aa4dc056ccedcde60ae7f447376d93fb9f66f20db418d40e67517b8efc809e --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 13:18:31,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 13:18:31,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 13:18:31,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 13:18:31,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 13:18:31,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 13:18:31,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 13:18:31,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 13:18:31,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 13:18:31,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 13:18:31,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 13:18:31,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 13:18:31,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 13:18:31,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 13:18:31,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 13:18:31,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 13:18:31,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 13:18:31,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 13:18:31,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 13:18:31,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 13:18:31,697 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 13:18:31,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 13:18:31,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 13:18:31,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 13:18:31,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 13:18:31,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 13:18:31,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 13:18:31,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 13:18:31,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 13:18:31,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 13:18:31,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 13:18:31,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 13:18:31,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 13:18:31,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 13:18:31,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 13:18:31,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 13:18:31,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 13:18:31,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 13:18:31,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 13:18:31,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 13:18:31,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 13:18:31,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 13:18:31,715 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 13:18:31,742 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 13:18:31,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 13:18:31,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 13:18:31,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 13:18:31,744 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 13:18:31,744 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 13:18:31,745 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 13:18:31,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 13:18:31,745 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 13:18:31,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 13:18:31,746 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 13:18:31,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 13:18:31,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 13:18:31,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 13:18:31,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 13:18:31,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 13:18:31,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 13:18:31,748 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 13:18:31,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 13:18:31,748 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 13:18:31,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 13:18:31,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 13:18:31,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 13:18:31,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 13:18:31,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:18:31,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 13:18:31,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 13:18:31,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 13:18:31,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 13:18:31,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 13:18:31,750 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 13:18:31,750 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 13:18:31,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 13:18:31,750 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92aa4dc056ccedcde60ae7f447376d93fb9f66f20db418d40e67517b8efc809e [2022-07-13 13:18:31,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 13:18:31,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 13:18:31,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 13:18:31,949 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 13:18:31,950 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 13:18:31,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label51.c [2022-07-13 13:18:32,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/079266f1e/cc65deb33e4044acbbbd136113434be0/FLAGc762e6752 [2022-07-13 13:18:32,471 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 13:18:32,471 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label51.c [2022-07-13 13:18:32,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/079266f1e/cc65deb33e4044acbbbd136113434be0/FLAGc762e6752 [2022-07-13 13:18:32,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/079266f1e/cc65deb33e4044acbbbd136113434be0 [2022-07-13 13:18:32,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 13:18:32,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 13:18:32,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 13:18:32,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 13:18:32,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 13:18:32,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:18:32" (1/1) ... [2022-07-13 13:18:32,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f5d59d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:32, skipping insertion in model container [2022-07-13 13:18:32,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:18:32" (1/1) ... [2022-07-13 13:18:32,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 13:18:32,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 13:18:33,003 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label51.c[5625,5638] [2022-07-13 13:18:33,369 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:18:33,374 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 13:18:33,395 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label51.c[5625,5638] [2022-07-13 13:18:33,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:18:33,576 INFO L208 MainTranslator]: Completed translation [2022-07-13 13:18:33,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:33 WrapperNode [2022-07-13 13:18:33,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 13:18:33,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 13:18:33,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 13:18:33,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 13:18:33,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:33" (1/1) ... [2022-07-13 13:18:33,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:33" (1/1) ... [2022-07-13 13:18:33,840 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-13 13:18:33,841 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 13:18:33,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 13:18:33,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 13:18:33,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 13:18:33,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:33" (1/1) ... [2022-07-13 13:18:33,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:33" (1/1) ... [2022-07-13 13:18:33,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:33" (1/1) ... [2022-07-13 13:18:33,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:33" (1/1) ... [2022-07-13 13:18:34,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:33" (1/1) ... [2022-07-13 13:18:34,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:33" (1/1) ... [2022-07-13 13:18:34,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:33" (1/1) ... [2022-07-13 13:18:34,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 13:18:34,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 13:18:34,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 13:18:34,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 13:18:34,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:33" (1/1) ... [2022-07-13 13:18:34,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:18:34,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:18:34,132 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) [2022-07-13 13:18:34,151 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 [2022-07-13 13:18:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 13:18:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 13:18:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 13:18:34,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 13:18:34,202 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 13:18:34,203 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 13:18:36,566 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 13:18:36,583 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 13:18:36,584 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 13:18:36,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:18:36 BoogieIcfgContainer [2022-07-13 13:18:36,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 13:18:36,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 13:18:36,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 13:18:36,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 13:18:36,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 01:18:32" (1/3) ... [2022-07-13 13:18:36,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@711335b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:18:36, skipping insertion in model container [2022-07-13 13:18:36,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:33" (2/3) ... [2022-07-13 13:18:36,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@711335b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:18:36, skipping insertion in model container [2022-07-13 13:18:36,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:18:36" (3/3) ... [2022-07-13 13:18:36,628 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label51.c [2022-07-13 13:18:36,636 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 13:18:36,636 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 13:18:36,722 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 13:18:36,726 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@d170cab, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@75fa7640 [2022-07-13 13:18:36,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 13:18:36,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:36,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-13 13:18:36,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:36,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:36,737 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:36,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:36,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2088660649, now seen corresponding path program 1 times [2022-07-13 13:18:36,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:36,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926305262] [2022-07-13 13:18:36,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:36,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:18:36,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:36,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926305262] [2022-07-13 13:18:36,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926305262] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:36,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:36,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:18:36,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344219574] [2022-07-13 13:18:36,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:36,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:36,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:36,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:36,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:36,975 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:39,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:39,318 INFO L93 Difference]: Finished difference Result 1680 states and 3074 transitions. [2022-07-13 13:18:39,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:39,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-13 13:18:39,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:39,334 INFO L225 Difference]: With dead ends: 1680 [2022-07-13 13:18:39,334 INFO L226 Difference]: Without dead ends: 1011 [2022-07-13 13:18:39,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:39,340 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 544 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:39,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 220 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 13:18:39,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-07-13 13:18:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 996. [2022-07-13 13:18:39,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.735678391959799) internal successors, (1727), 995 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:39,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1727 transitions. [2022-07-13 13:18:39,403 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1727 transitions. Word has length 37 [2022-07-13 13:18:39,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:39,404 INFO L495 AbstractCegarLoop]: Abstraction has 996 states and 1727 transitions. [2022-07-13 13:18:39,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:39,404 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1727 transitions. [2022-07-13 13:18:39,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-13 13:18:39,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:39,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:39,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 13:18:39,407 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:39,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:39,408 INFO L85 PathProgramCache]: Analyzing trace with hash 52735373, now seen corresponding path program 1 times [2022-07-13 13:18:39,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:39,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001050346] [2022-07-13 13:18:39,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:39,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:18:39,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:39,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001050346] [2022-07-13 13:18:39,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001050346] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:39,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:39,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:18:39,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047933774] [2022-07-13 13:18:39,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:39,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:39,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:39,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:39,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:39,499 INFO L87 Difference]: Start difference. First operand 996 states and 1727 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:41,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:41,319 INFO L93 Difference]: Finished difference Result 2873 states and 5026 transitions. [2022-07-13 13:18:41,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:41,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2022-07-13 13:18:41,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:41,325 INFO L225 Difference]: With dead ends: 2873 [2022-07-13 13:18:41,325 INFO L226 Difference]: Without dead ends: 1879 [2022-07-13 13:18:41,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:41,327 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 409 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:41,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 521 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 13:18:41,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2022-07-13 13:18:41,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1870. [2022-07-13 13:18:41,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 1.4724451578384163) internal successors, (2752), 1869 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:41,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2752 transitions. [2022-07-13 13:18:41,358 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2752 transitions. Word has length 102 [2022-07-13 13:18:41,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:41,358 INFO L495 AbstractCegarLoop]: Abstraction has 1870 states and 2752 transitions. [2022-07-13 13:18:41,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:41,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2752 transitions. [2022-07-13 13:18:41,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-13 13:18:41,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:41,361 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:41,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 13:18:41,361 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:41,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:41,362 INFO L85 PathProgramCache]: Analyzing trace with hash 834662076, now seen corresponding path program 1 times [2022-07-13 13:18:41,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:41,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635840869] [2022-07-13 13:18:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:41,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:18:41,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:41,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635840869] [2022-07-13 13:18:41,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635840869] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:41,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:41,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:41,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111368591] [2022-07-13 13:18:41,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:41,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:41,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:41,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:41,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:41,466 INFO L87 Difference]: Start difference. First operand 1870 states and 2752 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:43,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:43,304 INFO L93 Difference]: Finished difference Result 5454 states and 8042 transitions. [2022-07-13 13:18:43,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:43,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-07-13 13:18:43,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:43,313 INFO L225 Difference]: With dead ends: 5454 [2022-07-13 13:18:43,313 INFO L226 Difference]: Without dead ends: 3586 [2022-07-13 13:18:43,315 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 [2022-07-13 13:18:43,319 INFO L413 NwaCegarLoop]: 846 mSDtfsCounter, 457 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:43,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 914 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 13:18:43,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2022-07-13 13:18:43,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3583. [2022-07-13 13:18:43,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 1.3358458961474038) internal successors, (4785), 3582 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:43,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4785 transitions. [2022-07-13 13:18:43,363 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4785 transitions. Word has length 107 [2022-07-13 13:18:43,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:43,364 INFO L495 AbstractCegarLoop]: Abstraction has 3583 states and 4785 transitions. [2022-07-13 13:18:43,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:43,364 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4785 transitions. [2022-07-13 13:18:43,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-13 13:18:43,373 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:43,373 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:43,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 13:18:43,373 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:43,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:43,376 INFO L85 PathProgramCache]: Analyzing trace with hash -923975225, now seen corresponding path program 1 times [2022-07-13 13:18:43,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:43,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416685489] [2022-07-13 13:18:43,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:43,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:18:43,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:43,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416685489] [2022-07-13 13:18:43,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416685489] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:43,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:43,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:18:43,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874402957] [2022-07-13 13:18:43,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:43,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:43,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:43,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:43,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:43,499 INFO L87 Difference]: Start difference. First operand 3583 states and 4785 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:45,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:45,186 INFO L93 Difference]: Finished difference Result 10571 states and 14111 transitions. [2022-07-13 13:18:45,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:45,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 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 148 [2022-07-13 13:18:45,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:45,199 INFO L225 Difference]: With dead ends: 10571 [2022-07-13 13:18:45,200 INFO L226 Difference]: Without dead ends: 5286 [2022-07-13 13:18:45,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:45,204 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 347 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:45,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:18:45,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2022-07-13 13:18:45,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 4431. [2022-07-13 13:18:45,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4431 states, 4430 states have (on average 1.209255079006772) internal successors, (5357), 4430 states have internal predecessors, (5357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:45,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4431 states to 4431 states and 5357 transitions. [2022-07-13 13:18:45,268 INFO L78 Accepts]: Start accepts. Automaton has 4431 states and 5357 transitions. Word has length 148 [2022-07-13 13:18:45,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:45,268 INFO L495 AbstractCegarLoop]: Abstraction has 4431 states and 5357 transitions. [2022-07-13 13:18:45,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:45,269 INFO L276 IsEmpty]: Start isEmpty. Operand 4431 states and 5357 transitions. [2022-07-13 13:18:45,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-07-13 13:18:45,271 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:45,271 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:45,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 13:18:45,271 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:45,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:45,272 INFO L85 PathProgramCache]: Analyzing trace with hash -33662266, now seen corresponding path program 1 times [2022-07-13 13:18:45,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:45,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414768294] [2022-07-13 13:18:45,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:45,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:18:45,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:45,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414768294] [2022-07-13 13:18:45,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414768294] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:45,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:45,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:45,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111589787] [2022-07-13 13:18:45,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:45,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:45,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:45,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:45,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:45,361 INFO L87 Difference]: Start difference. First operand 4431 states and 5357 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:46,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:46,767 INFO L93 Difference]: Finished difference Result 11410 states and 14012 transitions. [2022-07-13 13:18:46,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:46,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 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 189 [2022-07-13 13:18:46,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:46,787 INFO L225 Difference]: With dead ends: 11410 [2022-07-13 13:18:46,787 INFO L226 Difference]: Without dead ends: 6981 [2022-07-13 13:18:46,792 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 [2022-07-13 13:18:46,793 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:46,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 785 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 13:18:46,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6981 states. [2022-07-13 13:18:46,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6981 to 6981. [2022-07-13 13:18:46,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6981 states, 6980 states have (on average 1.1835243553008596) internal successors, (8261), 6980 states have internal predecessors, (8261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:46,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6981 states to 6981 states and 8261 transitions. [2022-07-13 13:18:46,874 INFO L78 Accepts]: Start accepts. Automaton has 6981 states and 8261 transitions. Word has length 189 [2022-07-13 13:18:46,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:46,875 INFO L495 AbstractCegarLoop]: Abstraction has 6981 states and 8261 transitions. [2022-07-13 13:18:46,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:46,877 INFO L276 IsEmpty]: Start isEmpty. Operand 6981 states and 8261 transitions. [2022-07-13 13:18:46,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-07-13 13:18:46,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:46,880 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:46,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 13:18:46,881 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:46,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:46,881 INFO L85 PathProgramCache]: Analyzing trace with hash -650402679, now seen corresponding path program 1 times [2022-07-13 13:18:46,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:46,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645562051] [2022-07-13 13:18:46,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:46,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-13 13:18:46,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:46,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645562051] [2022-07-13 13:18:46,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645562051] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:46,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:46,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:46,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371186767] [2022-07-13 13:18:46,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:47,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:47,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:47,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:47,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:47,000 INFO L87 Difference]: Start difference. First operand 6981 states and 8261 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:48,494 INFO L93 Difference]: Finished difference Result 17786 states and 21271 transitions. [2022-07-13 13:18:48,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:48,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 269 [2022-07-13 13:18:48,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:48,527 INFO L225 Difference]: With dead ends: 17786 [2022-07-13 13:18:48,527 INFO L226 Difference]: Without dead ends: 9957 [2022-07-13 13:18:48,536 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 [2022-07-13 13:18:48,537 INFO L413 NwaCegarLoop]: 788 mSDtfsCounter, 384 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:48,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 858 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:18:48,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9957 states. [2022-07-13 13:18:48,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9957 to 9957. [2022-07-13 13:18:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9957 states, 9956 states have (on average 1.1449377259943752) internal successors, (11399), 9956 states have internal predecessors, (11399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:48,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9957 states to 9957 states and 11399 transitions. [2022-07-13 13:18:48,657 INFO L78 Accepts]: Start accepts. Automaton has 9957 states and 11399 transitions. Word has length 269 [2022-07-13 13:18:48,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:48,658 INFO L495 AbstractCegarLoop]: Abstraction has 9957 states and 11399 transitions. [2022-07-13 13:18:48,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:48,659 INFO L276 IsEmpty]: Start isEmpty. Operand 9957 states and 11399 transitions. [2022-07-13 13:18:48,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-07-13 13:18:48,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:48,664 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:48,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 13:18:48,665 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:48,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:48,665 INFO L85 PathProgramCache]: Analyzing trace with hash 303507172, now seen corresponding path program 1 times [2022-07-13 13:18:48,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:48,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97011831] [2022-07-13 13:18:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:48,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-07-13 13:18:48,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:48,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97011831] [2022-07-13 13:18:48,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97011831] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:48,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:48,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:48,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306892744] [2022-07-13 13:18:48,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:48,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:48,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:48,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:48,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:48,819 INFO L87 Difference]: Start difference. First operand 9957 states and 11399 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:50,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:50,371 INFO L93 Difference]: Finished difference Result 25017 states and 28859 transitions. [2022-07-13 13:18:50,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:50,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 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 309 [2022-07-13 13:18:50,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:50,392 INFO L225 Difference]: With dead ends: 25017 [2022-07-13 13:18:50,393 INFO L226 Difference]: Without dead ends: 15062 [2022-07-13 13:18:50,403 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 [2022-07-13 13:18:50,406 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 463 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:50,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 368 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:18:50,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15062 states. [2022-07-13 13:18:50,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15062 to 13780. [2022-07-13 13:18:50,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13780 states, 13779 states have (on average 1.1398504971333188) internal successors, (15706), 13779 states have internal predecessors, (15706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:50,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13780 states to 13780 states and 15706 transitions. [2022-07-13 13:18:50,546 INFO L78 Accepts]: Start accepts. Automaton has 13780 states and 15706 transitions. Word has length 309 [2022-07-13 13:18:50,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:50,546 INFO L495 AbstractCegarLoop]: Abstraction has 13780 states and 15706 transitions. [2022-07-13 13:18:50,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:50,547 INFO L276 IsEmpty]: Start isEmpty. Operand 13780 states and 15706 transitions. [2022-07-13 13:18:50,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2022-07-13 13:18:50,553 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:50,553 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:50,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 13:18:50,553 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:50,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:50,554 INFO L85 PathProgramCache]: Analyzing trace with hash -851527212, now seen corresponding path program 1 times [2022-07-13 13:18:50,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:50,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095112975] [2022-07-13 13:18:50,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:50,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:50,747 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:18:50,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:50,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095112975] [2022-07-13 13:18:50,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095112975] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:50,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:50,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:50,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974235381] [2022-07-13 13:18:50,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:50,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:18:50,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:50,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:18:50,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:18:50,750 INFO L87 Difference]: Start difference. First operand 13780 states and 15706 transitions. Second operand has 4 states, 4 states have (on average 94.0) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:53,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:53,060 INFO L93 Difference]: Finished difference Result 32278 states and 36930 transitions. [2022-07-13 13:18:53,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:18:53,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 94.0) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 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 376 [2022-07-13 13:18:53,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:53,081 INFO L225 Difference]: With dead ends: 32278 [2022-07-13 13:18:53,081 INFO L226 Difference]: Without dead ends: 18075 [2022-07-13 13:18:53,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:18:53,096 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 638 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 2406 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 2406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:53,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 229 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 2406 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 13:18:53,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18075 states. [2022-07-13 13:18:53,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18075 to 18069. [2022-07-13 13:18:53,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18069 states, 18068 states have (on average 1.1503210095195926) internal successors, (20784), 18068 states have internal predecessors, (20784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:53,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18069 states to 18069 states and 20784 transitions. [2022-07-13 13:18:53,317 INFO L78 Accepts]: Start accepts. Automaton has 18069 states and 20784 transitions. Word has length 376 [2022-07-13 13:18:53,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:53,318 INFO L495 AbstractCegarLoop]: Abstraction has 18069 states and 20784 transitions. [2022-07-13 13:18:53,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.0) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:53,318 INFO L276 IsEmpty]: Start isEmpty. Operand 18069 states and 20784 transitions. [2022-07-13 13:18:53,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2022-07-13 13:18:53,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:53,329 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:53,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 13:18:53,329 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:53,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:53,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1472504530, now seen corresponding path program 1 times [2022-07-13 13:18:53,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:53,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921788326] [2022-07-13 13:18:53,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:53,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:18:53,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:53,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921788326] [2022-07-13 13:18:53,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921788326] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:53,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:53,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:53,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013520753] [2022-07-13 13:18:53,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:53,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:53,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:53,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:53,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:53,501 INFO L87 Difference]: Start difference. First operand 18069 states and 20784 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:55,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:55,009 INFO L93 Difference]: Finished difference Result 41261 states and 47726 transitions. [2022-07-13 13:18:55,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:55,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 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 423 [2022-07-13 13:18:55,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:55,036 INFO L225 Difference]: With dead ends: 41261 [2022-07-13 13:18:55,036 INFO L226 Difference]: Without dead ends: 22339 [2022-07-13 13:18:55,055 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 [2022-07-13 13:18:55,057 INFO L413 NwaCegarLoop]: 788 mSDtfsCounter, 436 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:55,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 858 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:18:55,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22339 states. [2022-07-13 13:18:55,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22339 to 22334. [2022-07-13 13:18:55,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22334 states, 22333 states have (on average 1.141987193838714) internal successors, (25504), 22333 states have internal predecessors, (25504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22334 states to 22334 states and 25504 transitions. [2022-07-13 13:18:55,309 INFO L78 Accepts]: Start accepts. Automaton has 22334 states and 25504 transitions. Word has length 423 [2022-07-13 13:18:55,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:55,312 INFO L495 AbstractCegarLoop]: Abstraction has 22334 states and 25504 transitions. [2022-07-13 13:18:55,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:55,312 INFO L276 IsEmpty]: Start isEmpty. Operand 22334 states and 25504 transitions. [2022-07-13 13:18:55,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-07-13 13:18:55,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:55,324 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:55,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 13:18:55,325 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:55,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:55,325 INFO L85 PathProgramCache]: Analyzing trace with hash 2020726887, now seen corresponding path program 1 times [2022-07-13 13:18:55,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:55,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346166856] [2022-07-13 13:18:55,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:55,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-07-13 13:18:55,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:55,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346166856] [2022-07-13 13:18:55,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346166856] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:55,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:55,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:55,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624058899] [2022-07-13 13:18:55,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:55,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:55,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:55,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:55,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:55,445 INFO L87 Difference]: Start difference. First operand 22334 states and 25504 transitions. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:57,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:57,180 INFO L93 Difference]: Finished difference Result 56175 states and 64291 transitions. [2022-07-13 13:18:57,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:57,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 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 479 [2022-07-13 13:18:57,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:57,215 INFO L225 Difference]: With dead ends: 56175 [2022-07-13 13:18:57,216 INFO L226 Difference]: Without dead ends: 33843 [2022-07-13 13:18:57,229 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 [2022-07-13 13:18:57,230 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 504 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1315 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 1315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:57,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 279 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 1315 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:18:57,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33843 states. [2022-07-13 13:18:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33843 to 33397. [2022-07-13 13:18:57,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33397 states, 33396 states have (on average 1.134267576955324) internal successors, (37880), 33396 states have internal predecessors, (37880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33397 states to 33397 states and 37880 transitions. [2022-07-13 13:18:57,526 INFO L78 Accepts]: Start accepts. Automaton has 33397 states and 37880 transitions. Word has length 479 [2022-07-13 13:18:57,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:57,527 INFO L495 AbstractCegarLoop]: Abstraction has 33397 states and 37880 transitions. [2022-07-13 13:18:57,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:57,527 INFO L276 IsEmpty]: Start isEmpty. Operand 33397 states and 37880 transitions. [2022-07-13 13:18:57,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2022-07-13 13:18:57,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:57,542 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:57,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 13:18:57,543 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:57,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1681382793, now seen corresponding path program 1 times [2022-07-13 13:18:57,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:57,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968870281] [2022-07-13 13:18:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:57,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 14 proven. 90 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-07-13 13:18:57,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:57,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968870281] [2022-07-13 13:18:57,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968870281] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:18:57,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482589827] [2022-07-13 13:18:57,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:57,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:18:57,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:18:57,780 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) [2022-07-13 13:18:57,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 13:18:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:57,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 13:18:57,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:18:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-07-13 13:18:58,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:18:58,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482589827] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:58,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:18:58,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-13 13:18:58,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390135023] [2022-07-13 13:18:58,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:58,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:58,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:58,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:58,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:18:58,030 INFO L87 Difference]: Start difference. First operand 33397 states and 37880 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:59,725 INFO L93 Difference]: Finished difference Result 73168 states and 82985 transitions. [2022-07-13 13:18:59,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:59,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 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 480 [2022-07-13 13:18:59,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:59,763 INFO L225 Difference]: With dead ends: 73168 [2022-07-13 13:18:59,764 INFO L226 Difference]: Without dead ends: 38048 [2022-07-13 13:18:59,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:18:59,784 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 496 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:59,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 664 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:18:59,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38048 states. [2022-07-13 13:19:00,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38048 to 38045. [2022-07-13 13:19:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38045 states, 38044 states have (on average 1.120912627483966) internal successors, (42644), 38044 states have internal predecessors, (42644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:00,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38045 states to 38045 states and 42644 transitions. [2022-07-13 13:19:00,109 INFO L78 Accepts]: Start accepts. Automaton has 38045 states and 42644 transitions. Word has length 480 [2022-07-13 13:19:00,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:00,110 INFO L495 AbstractCegarLoop]: Abstraction has 38045 states and 42644 transitions. [2022-07-13 13:19:00,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:00,110 INFO L276 IsEmpty]: Start isEmpty. Operand 38045 states and 42644 transitions. [2022-07-13 13:19:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2022-07-13 13:19:00,122 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:00,122 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:00,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 13:19:00,335 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,SelfDestructingSolverStorable10 [2022-07-13 13:19:00,336 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:00,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:00,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1279903704, now seen corresponding path program 1 times [2022-07-13 13:19:00,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:00,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266360957] [2022-07-13 13:19:00,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:00,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:00,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-07-13 13:19:00,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:00,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266360957] [2022-07-13 13:19:00,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266360957] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:00,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:00,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:19:00,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644282901] [2022-07-13 13:19:00,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:00,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:19:00,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:00,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:19:00,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:19:00,631 INFO L87 Difference]: Start difference. First operand 38045 states and 42644 transitions. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:01,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:01,861 INFO L93 Difference]: Finished difference Result 76083 states and 85281 transitions. [2022-07-13 13:19:01,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:19:01,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 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 504 [2022-07-13 13:19:01,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:01,896 INFO L225 Difference]: With dead ends: 76083 [2022-07-13 13:19:01,896 INFO L226 Difference]: Without dead ends: 38040 [2022-07-13 13:19:01,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:19:01,919 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 595 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:01,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 554 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 13:19:01,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38040 states. [2022-07-13 13:19:02,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38040 to 38039. [2022-07-13 13:19:02,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38039 states, 38038 states have (on average 1.1203270413796729) internal successors, (42615), 38038 states have internal predecessors, (42615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38039 states to 38039 states and 42615 transitions. [2022-07-13 13:19:02,286 INFO L78 Accepts]: Start accepts. Automaton has 38039 states and 42615 transitions. Word has length 504 [2022-07-13 13:19:02,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:02,287 INFO L495 AbstractCegarLoop]: Abstraction has 38039 states and 42615 transitions. [2022-07-13 13:19:02,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:02,287 INFO L276 IsEmpty]: Start isEmpty. Operand 38039 states and 42615 transitions. [2022-07-13 13:19:02,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2022-07-13 13:19:02,306 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:02,307 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:02,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 13:19:02,308 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:02,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:02,308 INFO L85 PathProgramCache]: Analyzing trace with hash -277505785, now seen corresponding path program 1 times [2022-07-13 13:19:02,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:02,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521313769] [2022-07-13 13:19:02,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:02,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 373 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:19:02,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:02,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521313769] [2022-07-13 13:19:02,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521313769] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:02,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:02,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:19:02,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954959313] [2022-07-13 13:19:02,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:02,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:19:02,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:02,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:19:02,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:19:02,511 INFO L87 Difference]: Start difference. First operand 38039 states and 42615 transitions. Second operand has 4 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:04,935 INFO L93 Difference]: Finished difference Result 97818 states and 109234 transitions. [2022-07-13 13:19:04,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:19:04,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 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 590 [2022-07-13 13:19:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:04,996 INFO L225 Difference]: With dead ends: 97818 [2022-07-13 13:19:04,996 INFO L226 Difference]: Without dead ends: 59781 [2022-07-13 13:19:05,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:19:05,030 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 539 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 2315 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 2315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:05,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 175 Invalid, 2716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 2315 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 13:19:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59781 states. [2022-07-13 13:19:05,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59781 to 57222. [2022-07-13 13:19:05,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57222 states, 57221 states have (on average 1.1138218486220095) internal successors, (63734), 57221 states have internal predecessors, (63734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57222 states to 57222 states and 63734 transitions. [2022-07-13 13:19:05,715 INFO L78 Accepts]: Start accepts. Automaton has 57222 states and 63734 transitions. Word has length 590 [2022-07-13 13:19:05,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:05,715 INFO L495 AbstractCegarLoop]: Abstraction has 57222 states and 63734 transitions. [2022-07-13 13:19:05,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand 57222 states and 63734 transitions. [2022-07-13 13:19:05,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2022-07-13 13:19:05,844 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:05,845 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:05,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 13:19:05,845 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:05,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:05,846 INFO L85 PathProgramCache]: Analyzing trace with hash -728584266, now seen corresponding path program 1 times [2022-07-13 13:19:05,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:05,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116926403] [2022-07-13 13:19:05,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:05,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2022-07-13 13:19:06,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:06,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116926403] [2022-07-13 13:19:06,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116926403] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:06,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:06,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:19:06,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320567692] [2022-07-13 13:19:06,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:06,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 13:19:06,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:06,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 13:19:06,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 13:19:06,055 INFO L87 Difference]: Start difference. First operand 57222 states and 63734 transitions. Second operand has 5 states, 5 states have (on average 69.6) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:08,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:08,335 INFO L93 Difference]: Finished difference Result 116621 states and 129744 transitions. [2022-07-13 13:19:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 13:19:08,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 69.6) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 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 596 [2022-07-13 13:19:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:08,391 INFO L225 Difference]: With dead ends: 116621 [2022-07-13 13:19:08,391 INFO L226 Difference]: Without dead ends: 58487 [2022-07-13 13:19:08,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 13:19:08,418 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 867 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 2257 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 2428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:08,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 160 Invalid, 2428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2257 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 13:19:08,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58487 states. [2022-07-13 13:19:08,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58487 to 58480. [2022-07-13 13:19:08,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58480 states, 58479 states have (on average 1.1052856580994888) internal successors, (64636), 58479 states have internal predecessors, (64636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:08,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58480 states to 58480 states and 64636 transitions. [2022-07-13 13:19:08,958 INFO L78 Accepts]: Start accepts. Automaton has 58480 states and 64636 transitions. Word has length 596 [2022-07-13 13:19:08,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:08,958 INFO L495 AbstractCegarLoop]: Abstraction has 58480 states and 64636 transitions. [2022-07-13 13:19:08,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.6) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 58480 states and 64636 transitions. [2022-07-13 13:19:08,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2022-07-13 13:19:08,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:08,974 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:08,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 13:19:08,975 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:08,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:08,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1471035311, now seen corresponding path program 1 times [2022-07-13 13:19:08,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:08,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798020574] [2022-07-13 13:19:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:08,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 366 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-07-13 13:19:09,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:09,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798020574] [2022-07-13 13:19:09,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798020574] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:09,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:09,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:19:09,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808951814] [2022-07-13 13:19:09,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:09,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:19:09,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:09,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:19:09,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:19:09,134 INFO L87 Difference]: Start difference. First operand 58480 states and 64636 transitions. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:11,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:11,152 INFO L93 Difference]: Finished difference Result 130168 states and 144094 transitions. [2022-07-13 13:19:11,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:19:11,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 604 [2022-07-13 13:19:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:11,229 INFO L225 Difference]: With dead ends: 130168 [2022-07-13 13:19:11,230 INFO L226 Difference]: Without dead ends: 70402 [2022-07-13 13:19:11,269 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 [2022-07-13 13:19:11,269 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 192 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:11,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 617 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 13:19:11,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70402 states. [2022-07-13 13:19:11,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70402 to 66569. [2022-07-13 13:19:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66569 states, 66568 states have (on average 1.1034731402475664) internal successors, (73456), 66568 states have internal predecessors, (73456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:12,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66569 states to 66569 states and 73456 transitions. [2022-07-13 13:19:12,105 INFO L78 Accepts]: Start accepts. Automaton has 66569 states and 73456 transitions. Word has length 604 [2022-07-13 13:19:12,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:12,105 INFO L495 AbstractCegarLoop]: Abstraction has 66569 states and 73456 transitions. [2022-07-13 13:19:12,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:12,106 INFO L276 IsEmpty]: Start isEmpty. Operand 66569 states and 73456 transitions. [2022-07-13 13:19:12,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 634 [2022-07-13 13:19:12,125 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:12,126 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:12,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 13:19:12,126 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:12,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:12,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1774489779, now seen corresponding path program 1 times [2022-07-13 13:19:12,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:12,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840257538] [2022-07-13 13:19:12,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:12,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 334 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:19:12,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:12,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840257538] [2022-07-13 13:19:12,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840257538] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:12,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:12,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:19:12,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754834030] [2022-07-13 13:19:12,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:12,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:19:12,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:12,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:19:12,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:19:12,331 INFO L87 Difference]: Start difference. First operand 66569 states and 73456 transitions. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:13,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:13,838 INFO L93 Difference]: Finished difference Result 122469 states and 134953 transitions. [2022-07-13 13:19:13,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:19:13,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 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 633 [2022-07-13 13:19:13,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:13,903 INFO L225 Difference]: With dead ends: 122469 [2022-07-13 13:19:13,903 INFO L226 Difference]: Without dead ends: 67854 [2022-07-13 13:19:13,937 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 [2022-07-13 13:19:13,939 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 101 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:13,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 738 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 13:19:13,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67854 states. [2022-07-13 13:19:14,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67854 to 66571. [2022-07-13 13:19:14,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66571 states, 66570 states have (on average 1.1034700315457413) internal successors, (73458), 66570 states have internal predecessors, (73458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66571 states to 66571 states and 73458 transitions. [2022-07-13 13:19:14,690 INFO L78 Accepts]: Start accepts. Automaton has 66571 states and 73458 transitions. Word has length 633 [2022-07-13 13:19:14,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:14,691 INFO L495 AbstractCegarLoop]: Abstraction has 66571 states and 73458 transitions. [2022-07-13 13:19:14,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 66571 states and 73458 transitions. [2022-07-13 13:19:14,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2022-07-13 13:19:14,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:14,712 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:14,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 13:19:14,713 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:14,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:14,713 INFO L85 PathProgramCache]: Analyzing trace with hash -719047658, now seen corresponding path program 1 times [2022-07-13 13:19:14,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:14,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287713986] [2022-07-13 13:19:14,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:14,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 384 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:19:15,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:15,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287713986] [2022-07-13 13:19:15,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287713986] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:15,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:15,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:19:15,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138287771] [2022-07-13 13:19:15,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:15,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:19:15,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:15,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:19:15,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:19:15,091 INFO L87 Difference]: Start difference. First operand 66571 states and 73458 transitions. Second operand has 4 states, 4 states have (on average 138.25) internal successors, (553), 4 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:17,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:17,471 INFO L93 Difference]: Finished difference Result 141226 states and 155588 transitions. [2022-07-13 13:19:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:19:17,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 138.25) internal successors, (553), 4 states have internal predecessors, (553), 0 states have call successors, (0), 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 634 [2022-07-13 13:19:17,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:17,543 INFO L225 Difference]: With dead ends: 141226 [2022-07-13 13:19:17,543 INFO L226 Difference]: Without dead ends: 74657 [2022-07-13 13:19:17,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:19:17,576 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 771 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:17,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [771 Valid, 164 Invalid, 2703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 2272 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 13:19:17,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74657 states. [2022-07-13 13:19:18,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74657 to 63596. [2022-07-13 13:19:18,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63596 states, 63595 states have (on average 1.0990958408679927) internal successors, (69897), 63595 states have internal predecessors, (69897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:18,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63596 states to 63596 states and 69897 transitions. [2022-07-13 13:19:18,267 INFO L78 Accepts]: Start accepts. Automaton has 63596 states and 69897 transitions. Word has length 634 [2022-07-13 13:19:18,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:18,267 INFO L495 AbstractCegarLoop]: Abstraction has 63596 states and 69897 transitions. [2022-07-13 13:19:18,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.25) internal successors, (553), 4 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:18,268 INFO L276 IsEmpty]: Start isEmpty. Operand 63596 states and 69897 transitions. [2022-07-13 13:19:18,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2022-07-13 13:19:18,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:18,293 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:18,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 13:19:18,294 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:18,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:18,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1361734072, now seen corresponding path program 1 times [2022-07-13 13:19:18,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:18,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278430415] [2022-07-13 13:19:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:18,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 461 proven. 160 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 13:19:18,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:18,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278430415] [2022-07-13 13:19:18,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278430415] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:19:18,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592525112] [2022-07-13 13:19:18,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:18,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:19:18,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:19:18,708 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) [2022-07-13 13:19:18,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 13:19:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:18,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 13:19:18,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:19:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 391 proven. 78 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-07-13 13:19:19,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:19:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 469 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-07-13 13:19:19,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592525112] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 13:19:19,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 13:19:19,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 8 [2022-07-13 13:19:19,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800690491] [2022-07-13 13:19:19,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:19,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:19:19,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:19,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:19:19,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 13:19:19,321 INFO L87 Difference]: Start difference. First operand 63596 states and 69897 transitions. Second operand has 4 states, 4 states have (on average 133.25) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:22,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:22,294 INFO L93 Difference]: Finished difference Result 142523 states and 156449 transitions. [2022-07-13 13:19:22,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:19:22,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 133.25) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 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 726 [2022-07-13 13:19:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:22,371 INFO L225 Difference]: With dead ends: 142523 [2022-07-13 13:19:22,371 INFO L226 Difference]: Without dead ends: 78929 [2022-07-13 13:19:22,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1454 GetRequests, 1448 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 13:19:22,411 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 848 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2203 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 2203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:22,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 156 Invalid, 2732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 2203 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-13 13:19:22,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78929 states. [2022-07-13 13:19:23,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78929 to 73821. [2022-07-13 13:19:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73821 states, 73820 states have (on average 1.095705770793823) internal successors, (80885), 73820 states have internal predecessors, (80885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:23,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73821 states to 73821 states and 80885 transitions. [2022-07-13 13:19:23,257 INFO L78 Accepts]: Start accepts. Automaton has 73821 states and 80885 transitions. Word has length 726 [2022-07-13 13:19:23,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:23,257 INFO L495 AbstractCegarLoop]: Abstraction has 73821 states and 80885 transitions. [2022-07-13 13:19:23,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.25) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:23,257 INFO L276 IsEmpty]: Start isEmpty. Operand 73821 states and 80885 transitions. [2022-07-13 13:19:23,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2022-07-13 13:19:23,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:23,282 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:23,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 13:19:23,482 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,SelfDestructingSolverStorable17 [2022-07-13 13:19:23,482 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:23,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:23,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1325675448, now seen corresponding path program 1 times [2022-07-13 13:19:23,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:23,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662049358] [2022-07-13 13:19:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:23,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 571 proven. 0 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-07-13 13:19:23,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:23,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662049358] [2022-07-13 13:19:23,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662049358] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:23,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:23,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:19:23,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207608594] [2022-07-13 13:19:23,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:23,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:19:23,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:23,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:19:23,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:19:23,774 INFO L87 Difference]: Start difference. First operand 73821 states and 80885 transitions. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:25,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:25,382 INFO L93 Difference]: Finished difference Result 144650 states and 158450 transitions. [2022-07-13 13:19:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:19:25,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 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 751 [2022-07-13 13:19:25,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:25,458 INFO L225 Difference]: With dead ends: 144650 [2022-07-13 13:19:25,458 INFO L226 Difference]: Without dead ends: 71256 [2022-07-13 13:19:25,491 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 [2022-07-13 13:19:25,492 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 489 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:25,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 661 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 13:19:25,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71256 states. [2022-07-13 13:19:26,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71256 to 71252. [2022-07-13 13:19:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71252 states, 71251 states have (on average 1.0865531711835623) internal successors, (77418), 71251 states have internal predecessors, (77418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71252 states to 71252 states and 77418 transitions. [2022-07-13 13:19:26,383 INFO L78 Accepts]: Start accepts. Automaton has 71252 states and 77418 transitions. Word has length 751 [2022-07-13 13:19:26,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:26,384 INFO L495 AbstractCegarLoop]: Abstraction has 71252 states and 77418 transitions. [2022-07-13 13:19:26,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 71252 states and 77418 transitions. [2022-07-13 13:19:26,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 777 [2022-07-13 13:19:26,418 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:26,418 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:26,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 13:19:26,418 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:26,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:26,419 INFO L85 PathProgramCache]: Analyzing trace with hash -2043822140, now seen corresponding path program 1 times [2022-07-13 13:19:26,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:26,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583995525] [2022-07-13 13:19:26,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:26,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 510 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-07-13 13:19:26,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:26,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583995525] [2022-07-13 13:19:26,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583995525] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:26,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:26,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:19:26,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844162481] [2022-07-13 13:19:26,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:26,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:19:26,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:26,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:19:26,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:19:26,630 INFO L87 Difference]: Start difference. First operand 71252 states and 77418 transitions. Second operand has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:28,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:28,944 INFO L93 Difference]: Finished difference Result 162528 states and 176470 transitions. [2022-07-13 13:19:28,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:19:28,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 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 776 [2022-07-13 13:19:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:29,037 INFO L225 Difference]: With dead ends: 162528 [2022-07-13 13:19:29,038 INFO L226 Difference]: Without dead ends: 91703 [2022-07-13 13:19:29,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:19:29,192 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 582 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2246 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 2246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:29,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 265 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 2246 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 13:19:29,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91703 states. [2022-07-13 13:19:29,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91703 to 78901. [2022-07-13 13:19:29,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78901 states, 78900 states have (on average 1.0764131812420785) internal successors, (84929), 78900 states have internal predecessors, (84929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:29,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78901 states to 78901 states and 84929 transitions. [2022-07-13 13:19:29,941 INFO L78 Accepts]: Start accepts. Automaton has 78901 states and 84929 transitions. Word has length 776 [2022-07-13 13:19:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:29,941 INFO L495 AbstractCegarLoop]: Abstraction has 78901 states and 84929 transitions. [2022-07-13 13:19:29,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:29,941 INFO L276 IsEmpty]: Start isEmpty. Operand 78901 states and 84929 transitions. [2022-07-13 13:19:29,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2022-07-13 13:19:29,965 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:29,965 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:29,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 13:19:29,966 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:29,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:29,966 INFO L85 PathProgramCache]: Analyzing trace with hash 96273895, now seen corresponding path program 1 times [2022-07-13 13:19:29,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:29,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601523423] [2022-07-13 13:19:29,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:29,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 516 proven. 0 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2022-07-13 13:19:30,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:30,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601523423] [2022-07-13 13:19:30,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601523423] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:30,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:30,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:19:30,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220083676] [2022-07-13 13:19:30,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:30,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:19:30,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:30,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:19:30,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:19:30,327 INFO L87 Difference]: Start difference. First operand 78901 states and 84929 transitions. Second operand has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:32,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:32,759 INFO L93 Difference]: Finished difference Result 169743 states and 182333 transitions. [2022-07-13 13:19:32,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:19:32,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 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 782 [2022-07-13 13:19:32,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:32,853 INFO L225 Difference]: With dead ends: 169743 [2022-07-13 13:19:32,853 INFO L226 Difference]: Without dead ends: 91269 [2022-07-13 13:19:32,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:19:32,902 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 589 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2368 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 2664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 2368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:32,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 294 Invalid, 2664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 2368 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 13:19:32,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91269 states. [2022-07-13 13:19:33,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91269 to 79328. [2022-07-13 13:19:33,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79328 states, 79327 states have (on average 1.076443077388531) internal successors, (85391), 79327 states have internal predecessors, (85391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79328 states to 79328 states and 85391 transitions. [2022-07-13 13:19:33,867 INFO L78 Accepts]: Start accepts. Automaton has 79328 states and 85391 transitions. Word has length 782 [2022-07-13 13:19:33,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:33,868 INFO L495 AbstractCegarLoop]: Abstraction has 79328 states and 85391 transitions. [2022-07-13 13:19:33,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand 79328 states and 85391 transitions. [2022-07-13 13:19:33,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 789 [2022-07-13 13:19:33,893 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:33,894 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:33,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 13:19:33,894 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:33,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:33,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1280526696, now seen corresponding path program 1 times [2022-07-13 13:19:33,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:33,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373593] [2022-07-13 13:19:33,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:33,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 651 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-13 13:19:34,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:34,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373593] [2022-07-13 13:19:34,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373593] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:34,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:34,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:19:34,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613365085] [2022-07-13 13:19:34,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:34,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:19:34,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:34,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:19:34,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:19:34,083 INFO L87 Difference]: Start difference. First operand 79328 states and 85391 transitions. Second operand has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:35,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:35,907 INFO L93 Difference]: Finished difference Result 168033 states and 180889 transitions. [2022-07-13 13:19:35,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:19:35,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 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 788 [2022-07-13 13:19:35,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:35,996 INFO L225 Difference]: With dead ends: 168033 [2022-07-13 13:19:35,996 INFO L226 Difference]: Without dead ends: 87425 [2022-07-13 13:19:36,045 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 [2022-07-13 13:19:36,046 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 306 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:36,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 607 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:19:36,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87425 states. [2022-07-13 13:19:37,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87425 to 82735. [2022-07-13 13:19:37,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82735 states, 82734 states have (on average 1.0714337515410834) internal successors, (88644), 82734 states have internal predecessors, (88644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:37,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82735 states to 82735 states and 88644 transitions. [2022-07-13 13:19:37,176 INFO L78 Accepts]: Start accepts. Automaton has 82735 states and 88644 transitions. Word has length 788 [2022-07-13 13:19:37,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:37,176 INFO L495 AbstractCegarLoop]: Abstraction has 82735 states and 88644 transitions. [2022-07-13 13:19:37,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:37,176 INFO L276 IsEmpty]: Start isEmpty. Operand 82735 states and 88644 transitions. [2022-07-13 13:19:37,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 809 [2022-07-13 13:19:37,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:37,201 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:37,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 13:19:37,202 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:37,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:37,202 INFO L85 PathProgramCache]: Analyzing trace with hash 706382245, now seen corresponding path program 1 times [2022-07-13 13:19:37,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:37,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687490566] [2022-07-13 13:19:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:37,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 754 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-13 13:19:37,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:37,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687490566] [2022-07-13 13:19:37,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687490566] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:37,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:37,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 13:19:37,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114920969] [2022-07-13 13:19:37,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:37,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 13:19:37,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:37,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 13:19:37,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:19:37,686 INFO L87 Difference]: Start difference. First operand 82735 states and 88644 transitions. Second operand has 6 states, 6 states have (on average 129.0) internal successors, (774), 5 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:40,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:40,544 INFO L93 Difference]: Finished difference Result 165796 states and 177622 transitions. [2022-07-13 13:19:40,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 13:19:40,545 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 129.0) internal successors, (774), 5 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 808 [2022-07-13 13:19:40,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:40,622 INFO L225 Difference]: With dead ends: 165796 [2022-07-13 13:19:40,622 INFO L226 Difference]: Without dead ends: 83488 [2022-07-13 13:19:40,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-13 13:19:40,649 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 1448 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 3672 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1448 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 3993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 3672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:40,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1448 Valid, 234 Invalid, 3993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 3672 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 13:19:40,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83488 states. [2022-07-13 13:19:41,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83488 to 83160. [2022-07-13 13:19:41,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83160 states, 83159 states have (on average 1.0710927259827558) internal successors, (89071), 83159 states have internal predecessors, (89071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:41,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83160 states to 83160 states and 89071 transitions. [2022-07-13 13:19:41,614 INFO L78 Accepts]: Start accepts. Automaton has 83160 states and 89071 transitions. Word has length 808 [2022-07-13 13:19:41,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:41,615 INFO L495 AbstractCegarLoop]: Abstraction has 83160 states and 89071 transitions. [2022-07-13 13:19:41,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 129.0) internal successors, (774), 5 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:41,615 INFO L276 IsEmpty]: Start isEmpty. Operand 83160 states and 89071 transitions. [2022-07-13 13:19:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 882 [2022-07-13 13:19:41,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:41,649 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:41,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 13:19:41,649 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:41,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:41,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1551425783, now seen corresponding path program 1 times [2022-07-13 13:19:41,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:41,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442542113] [2022-07-13 13:19:41,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:41,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 1060 proven. 105 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:19:42,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:42,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442542113] [2022-07-13 13:19:42,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442542113] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:19:42,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475494789] [2022-07-13 13:19:42,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:42,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:19:42,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:19:42,100 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) [2022-07-13 13:19:42,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 13:19:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:42,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 13:19:42,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:19:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 1073 trivial. 0 not checked. [2022-07-13 13:19:44,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:19:44,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475494789] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:44,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:19:44,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-13 13:19:44,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687820299] [2022-07-13 13:19:44,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:44,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:19:44,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:44,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:19:44,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:19:44,031 INFO L87 Difference]: Start difference. First operand 83160 states and 89071 transitions. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:46,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:46,004 INFO L93 Difference]: Finished difference Result 174410 states and 186522 transitions. [2022-07-13 13:19:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:19:46,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 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 881 [2022-07-13 13:19:46,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:46,086 INFO L225 Difference]: With dead ends: 174410 [2022-07-13 13:19:46,086 INFO L226 Difference]: Without dead ends: 91249 [2022-07-13 13:19:46,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 885 GetRequests, 881 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:19:46,103 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 469 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:46,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 125 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:19:46,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91249 states. [2022-07-13 13:19:46,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91249 to 74598. [2022-07-13 13:19:46,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74598 states, 74597 states have (on average 1.0695470327224956) internal successors, (79785), 74597 states have internal predecessors, (79785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74598 states to 74598 states and 79785 transitions. [2022-07-13 13:19:46,928 INFO L78 Accepts]: Start accepts. Automaton has 74598 states and 79785 transitions. Word has length 881 [2022-07-13 13:19:46,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:46,929 INFO L495 AbstractCegarLoop]: Abstraction has 74598 states and 79785 transitions. [2022-07-13 13:19:46,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:46,929 INFO L276 IsEmpty]: Start isEmpty. Operand 74598 states and 79785 transitions. [2022-07-13 13:19:46,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2022-07-13 13:19:46,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:46,960 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:46,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 13:19:47,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:19:47,164 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:47,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:47,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1614217377, now seen corresponding path program 1 times [2022-07-13 13:19:47,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:47,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059049674] [2022-07-13 13:19:47,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:47,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 1052 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-13 13:19:47,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:47,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059049674] [2022-07-13 13:19:47,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059049674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:47,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:47,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:19:47,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847997677] [2022-07-13 13:19:47,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:47,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:19:47,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:47,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:19:47,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:19:47,424 INFO L87 Difference]: Start difference. First operand 74598 states and 79785 transitions. Second operand has 4 states, 4 states have (on average 200.5) internal successors, (802), 4 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:50,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:50,086 INFO L93 Difference]: Finished difference Result 169634 states and 181269 transitions. [2022-07-13 13:19:50,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:19:50,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 200.5) internal successors, (802), 4 states have internal predecessors, (802), 0 states have call successors, (0), 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 956 [2022-07-13 13:19:50,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:50,179 INFO L225 Difference]: With dead ends: 169634 [2022-07-13 13:19:50,180 INFO L226 Difference]: Without dead ends: 95038 [2022-07-13 13:19:50,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:19:50,227 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 330 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 2671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:50,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 209 Invalid, 2671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 2331 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 13:19:50,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95038 states. [2022-07-13 13:19:51,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95038 to 88657. [2022-07-13 13:19:51,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88657 states, 88656 states have (on average 1.066143295434037) internal successors, (94520), 88656 states have internal predecessors, (94520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:51,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88657 states to 88657 states and 94520 transitions. [2022-07-13 13:19:51,213 INFO L78 Accepts]: Start accepts. Automaton has 88657 states and 94520 transitions. Word has length 956 [2022-07-13 13:19:51,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:51,214 INFO L495 AbstractCegarLoop]: Abstraction has 88657 states and 94520 transitions. [2022-07-13 13:19:51,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.5) internal successors, (802), 4 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:51,214 INFO L276 IsEmpty]: Start isEmpty. Operand 88657 states and 94520 transitions. [2022-07-13 13:19:51,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 962 [2022-07-13 13:19:51,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:51,249 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:51,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-13 13:19:51,249 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:51,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:51,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1105136907, now seen corresponding path program 1 times [2022-07-13 13:19:51,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:51,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560675552] [2022-07-13 13:19:51,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:51,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 1062 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-07-13 13:19:51,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:51,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560675552] [2022-07-13 13:19:51,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560675552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:51,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:51,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:19:51,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998634980] [2022-07-13 13:19:51,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:51,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:19:51,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:51,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:19:51,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:19:51,521 INFO L87 Difference]: Start difference. First operand 88657 states and 94520 transitions. Second operand has 4 states, 4 states have (on average 200.5) internal successors, (802), 4 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:54,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:54,096 INFO L93 Difference]: Finished difference Result 195623 states and 208374 transitions. [2022-07-13 13:19:54,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:19:54,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 200.5) internal successors, (802), 4 states have internal predecessors, (802), 0 states have call successors, (0), 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 961 [2022-07-13 13:19:54,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:54,213 INFO L225 Difference]: With dead ends: 195623 [2022-07-13 13:19:54,214 INFO L226 Difference]: Without dead ends: 106968 [2022-07-13 13:19:54,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:19:54,270 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 350 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:54,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 182 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 2181 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 13:19:54,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106968 states. [2022-07-13 13:19:55,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106968 to 88657. [2022-07-13 13:19:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88657 states, 88656 states have (on average 1.066143295434037) internal successors, (94520), 88656 states have internal predecessors, (94520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88657 states to 88657 states and 94520 transitions. [2022-07-13 13:19:55,286 INFO L78 Accepts]: Start accepts. Automaton has 88657 states and 94520 transitions. Word has length 961 [2022-07-13 13:19:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:55,287 INFO L495 AbstractCegarLoop]: Abstraction has 88657 states and 94520 transitions. [2022-07-13 13:19:55,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.5) internal successors, (802), 4 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 88657 states and 94520 transitions. [2022-07-13 13:19:55,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1049 [2022-07-13 13:19:55,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:55,337 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:55,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-13 13:19:55,337 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:55,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:55,338 INFO L85 PathProgramCache]: Analyzing trace with hash -286492085, now seen corresponding path program 1 times [2022-07-13 13:19:55,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:55,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996451050] [2022-07-13 13:19:55,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:55,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1537 backedges. 1232 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-07-13 13:19:55,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:55,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996451050] [2022-07-13 13:19:55,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996451050] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:55,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:55,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 13:19:55,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470242280] [2022-07-13 13:19:55,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:55,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 13:19:55,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:55,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 13:19:55,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 13:19:55,659 INFO L87 Difference]: Start difference. First operand 88657 states and 94520 transitions. Second operand has 5 states, 5 states have (on average 165.4) internal successors, (827), 5 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:19:58,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:58,975 INFO L93 Difference]: Finished difference Result 196888 states and 209770 transitions. [2022-07-13 13:19:58,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 13:19:58,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 165.4) internal successors, (827), 5 states have internal predecessors, (827), 0 states have call successors, (0), 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 1048 [2022-07-13 13:19:58,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:59,099 INFO L225 Difference]: With dead ends: 196888 [2022-07-13 13:19:59,099 INFO L226 Difference]: Without dead ends: 108233 [2022-07-13 13:19:59,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 13:19:59,157 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 1101 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 3191 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1101 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 3667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 3191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:59,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1101 Valid, 184 Invalid, 3667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 3191 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-13 13:19:59,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108233 states.