./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i -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 03931b69e9073178e54f20b91a2b2a66154a89c69758aa4d312927278c5c0104 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 04:40:10,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 04:40:10,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 04:40:10,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 04:40:10,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 04:40:10,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 04:40:10,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 04:40:10,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 04:40:10,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 04:40:10,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 04:40:10,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 04:40:10,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 04:40:10,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 04:40:10,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 04:40:10,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 04:40:10,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 04:40:10,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 04:40:10,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 04:40:10,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 04:40:10,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 04:40:10,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 04:40:10,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 04:40:10,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 04:40:10,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 04:40:10,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 04:40:10,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 04:40:10,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 04:40:10,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 04:40:10,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 04:40:10,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 04:40:10,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 04:40:10,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 04:40:10,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 04:40:10,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 04:40:10,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 04:40:10,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 04:40:10,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 04:40:10,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 04:40:10,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 04:40:10,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 04:40:10,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 04:40:10,755 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 04:40:10,772 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 04:40:10,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 04:40:10,775 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 04:40:10,776 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 04:40:10,776 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 04:40:10,776 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 04:40:10,777 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 04:40:10,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 04:40:10,778 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 04:40:10,778 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 04:40:10,779 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 04:40:10,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 04:40:10,779 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 04:40:10,779 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 04:40:10,779 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 04:40:10,779 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 04:40:10,779 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 04:40:10,780 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 04:40:10,780 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 04:40:10,780 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 04:40:10,780 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 04:40:10,780 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 04:40:10,780 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 04:40:10,781 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 04:40:10,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 04:40:10,781 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 04:40:10,781 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 04:40:10,781 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 04:40:10,782 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 04:40:10,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 04:40:10,782 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 04:40:10,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 04:40:10,782 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 04:40:10,782 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 04:40:10,783 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 04:40:10,783 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03931b69e9073178e54f20b91a2b2a66154a89c69758aa4d312927278c5c0104 [2023-02-17 04:40:10,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 04:40:11,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 04:40:11,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 04:40:11,022 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 04:40:11,023 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 04:40:11,024 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2023-02-17 04:40:12,126 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 04:40:12,259 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 04:40:12,260 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2023-02-17 04:40:12,264 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0873757fd/7b898fc3716a4882ba566ece355ce8be/FLAGdd5e90bb3 [2023-02-17 04:40:12,279 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0873757fd/7b898fc3716a4882ba566ece355ce8be [2023-02-17 04:40:12,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 04:40:12,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 04:40:12,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 04:40:12,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 04:40:12,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 04:40:12,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 04:40:12" (1/1) ... [2023-02-17 04:40:12,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70499b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:12, skipping insertion in model container [2023-02-17 04:40:12,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 04:40:12" (1/1) ... [2023-02-17 04:40:12,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 04:40:12,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 04:40:12,425 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_shadowinit.i[809,822] [2023-02-17 04:40:12,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 04:40:12,444 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 04:40:12,453 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_shadowinit.i[809,822] [2023-02-17 04:40:12,461 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 04:40:12,470 INFO L208 MainTranslator]: Completed translation [2023-02-17 04:40:12,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:12 WrapperNode [2023-02-17 04:40:12,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 04:40:12,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 04:40:12,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 04:40:12,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 04:40:12,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:12" (1/1) ... [2023-02-17 04:40:12,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:12" (1/1) ... [2023-02-17 04:40:12,495 INFO L138 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2023-02-17 04:40:12,495 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 04:40:12,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 04:40:12,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 04:40:12,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 04:40:12,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:12" (1/1) ... [2023-02-17 04:40:12,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:12" (1/1) ... [2023-02-17 04:40:12,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:12" (1/1) ... [2023-02-17 04:40:12,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:12" (1/1) ... [2023-02-17 04:40:12,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:12" (1/1) ... [2023-02-17 04:40:12,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:12" (1/1) ... [2023-02-17 04:40:12,522 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:12" (1/1) ... [2023-02-17 04:40:12,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:12" (1/1) ... [2023-02-17 04:40:12,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 04:40:12,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 04:40:12,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 04:40:12,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 04:40:12,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:12" (1/1) ... [2023-02-17 04:40:12,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 04:40:12,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:12,552 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 04:40:12,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 04:40:12,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 04:40:12,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 04:40:12,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 04:40:12,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 04:40:12,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 04:40:12,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 04:40:12,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 04:40:12,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 04:40:12,630 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 04:40:12,632 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 04:40:12,751 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 04:40:12,755 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 04:40:12,755 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 04:40:12,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 04:40:12 BoogieIcfgContainer [2023-02-17 04:40:12,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 04:40:12,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 04:40:12,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 04:40:12,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 04:40:12,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 04:40:12" (1/3) ... [2023-02-17 04:40:12,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45624ea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 04:40:12, skipping insertion in model container [2023-02-17 04:40:12,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:40:12" (2/3) ... [2023-02-17 04:40:12,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45624ea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 04:40:12, skipping insertion in model container [2023-02-17 04:40:12,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 04:40:12" (3/3) ... [2023-02-17 04:40:12,768 INFO L112 eAbstractionObserver]: Analyzing ICFG array_shadowinit.i [2023-02-17 04:40:12,804 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 04:40:12,804 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 04:40:12,859 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 04:40:12,864 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4f9d9aa5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 04:40:12,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 04:40:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:12,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 04:40:12,874 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:12,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:12,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:12,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:12,878 INFO L85 PathProgramCache]: Analyzing trace with hash 126038137, now seen corresponding path program 1 times [2023-02-17 04:40:12,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:12,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683890036] [2023-02-17 04:40:12,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:12,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:13,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:13,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683890036] [2023-02-17 04:40:13,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683890036] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:40:13,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 04:40:13,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 04:40:13,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652605307] [2023-02-17 04:40:13,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:40:13,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 04:40:13,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:13,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 04:40:13,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 04:40:13,061 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:13,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:13,073 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2023-02-17 04:40:13,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 04:40:13,074 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2023-02-17 04:40:13,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:13,080 INFO L225 Difference]: With dead ends: 26 [2023-02-17 04:40:13,081 INFO L226 Difference]: Without dead ends: 10 [2023-02-17 04:40:13,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 04:40:13,086 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:13,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:40:13,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-02-17 04:40:13,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-02-17 04:40:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:13,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-02-17 04:40:13,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2023-02-17 04:40:13,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:13,108 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-02-17 04:40:13,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:13,109 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-02-17 04:40:13,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 04:40:13,110 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:13,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:13,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 04:40:13,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:13,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:13,111 INFO L85 PathProgramCache]: Analyzing trace with hash 122344053, now seen corresponding path program 1 times [2023-02-17 04:40:13,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:13,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616436364] [2023-02-17 04:40:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:13,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:13,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:13,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:13,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616436364] [2023-02-17 04:40:13,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616436364] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:40:13,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 04:40:13,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 04:40:13,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119382318] [2023-02-17 04:40:13,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:40:13,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 04:40:13,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:13,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 04:40:13,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 04:40:13,184 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:13,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:13,209 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2023-02-17 04:40:13,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 04:40:13,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2023-02-17 04:40:13,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:13,210 INFO L225 Difference]: With dead ends: 17 [2023-02-17 04:40:13,210 INFO L226 Difference]: Without dead ends: 11 [2023-02-17 04:40:13,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 04:40:13,212 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:13,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:40:13,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-02-17 04:40:13,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-02-17 04:40:13,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:13,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-02-17 04:40:13,215 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2023-02-17 04:40:13,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:13,215 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-02-17 04:40:13,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:13,216 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-02-17 04:40:13,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 04:40:13,216 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:13,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:13,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 04:40:13,217 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:13,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:13,217 INFO L85 PathProgramCache]: Analyzing trace with hash -450855509, now seen corresponding path program 1 times [2023-02-17 04:40:13,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:13,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922068061] [2023-02-17 04:40:13,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:13,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:13,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:13,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922068061] [2023-02-17 04:40:13,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922068061] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:13,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414926689] [2023-02-17 04:40:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:13,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:13,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:13,497 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:13,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 04:40:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:13,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 04:40:13,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:13,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:40:13,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 59 [2023-02-17 04:40:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:13,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:13,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-02-17 04:40:13,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2023-02-17 04:40:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:13,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414926689] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:13,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:13,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-02-17 04:40:13,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635242440] [2023-02-17 04:40:13,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:13,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 04:40:13,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:13,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 04:40:13,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-02-17 04:40:13,671 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:13,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:13,724 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2023-02-17 04:40:13,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 04:40:13,724 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 04:40:13,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:13,725 INFO L225 Difference]: With dead ends: 17 [2023-02-17 04:40:13,725 INFO L226 Difference]: Without dead ends: 15 [2023-02-17 04:40:13,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-17 04:40:13,726 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:13,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 27 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:40:13,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-17 04:40:13,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2023-02-17 04:40:13,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:13,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-02-17 04:40:13,730 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2023-02-17 04:40:13,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:13,730 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-02-17 04:40:13,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-02-17 04:40:13,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-17 04:40:13,731 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:13,731 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:13,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:13,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:13,936 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:13,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:13,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1068940558, now seen corresponding path program 1 times [2023-02-17 04:40:13,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:13,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466530720] [2023-02-17 04:40:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:13,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:14,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:14,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466530720] [2023-02-17 04:40:14,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466530720] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:14,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008692526] [2023-02-17 04:40:14,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:14,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:14,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:14,008 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:14,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 04:40:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:14,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 04:40:14,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:14,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:14,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008692526] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:14,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:14,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-17 04:40:14,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463790452] [2023-02-17 04:40:14,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:14,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 04:40:14,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:14,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 04:40:14,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-17 04:40:14,131 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:14,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:14,163 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2023-02-17 04:40:14,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 04:40:14,163 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-17 04:40:14,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:14,164 INFO L225 Difference]: With dead ends: 30 [2023-02-17 04:40:14,164 INFO L226 Difference]: Without dead ends: 20 [2023-02-17 04:40:14,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-17 04:40:14,165 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:14,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 26 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:40:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-17 04:40:14,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2023-02-17 04:40:14,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:14,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-02-17 04:40:14,168 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2023-02-17 04:40:14,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:14,169 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-02-17 04:40:14,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:14,169 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-02-17 04:40:14,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-17 04:40:14,169 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:14,169 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:14,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:14,374 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,SelfDestructingSolverStorable3 [2023-02-17 04:40:14,375 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:14,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:14,375 INFO L85 PathProgramCache]: Analyzing trace with hash 407528232, now seen corresponding path program 2 times [2023-02-17 04:40:14,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:14,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994777105] [2023-02-17 04:40:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:14,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:14,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:14,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994777105] [2023-02-17 04:40:14,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994777105] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:14,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168070425] [2023-02-17 04:40:14,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:40:14,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:14,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:14,585 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:14,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 04:40:14,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:40:14,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:14,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 04:40:14,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:14,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:40:14,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2023-02-17 04:40:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:14,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:14,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-02-17 04:40:14,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-17 04:40:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:14,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168070425] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:14,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:14,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-02-17 04:40:14,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714111627] [2023-02-17 04:40:14,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:14,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 04:40:14,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:14,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 04:40:14,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-02-17 04:40:14,763 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:14,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:14,838 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2023-02-17 04:40:14,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 04:40:14,838 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-17 04:40:14,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:14,839 INFO L225 Difference]: With dead ends: 21 [2023-02-17 04:40:14,839 INFO L226 Difference]: Without dead ends: 19 [2023-02-17 04:40:14,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-02-17 04:40:14,840 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:14,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 43 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:40:14,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-17 04:40:14,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2023-02-17 04:40:14,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-02-17 04:40:14,843 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2023-02-17 04:40:14,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:14,844 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-02-17 04:40:14,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:14,844 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-02-17 04:40:14,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 04:40:14,857 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:14,857 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:14,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:15,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:15,063 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:15,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:15,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1194192811, now seen corresponding path program 3 times [2023-02-17 04:40:15,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:15,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924147719] [2023-02-17 04:40:15,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:15,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:15,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:15,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924147719] [2023-02-17 04:40:15,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924147719] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:15,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131092752] [2023-02-17 04:40:15,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 04:40:15,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:15,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:15,145 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:15,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 04:40:15,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 04:40:15,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:15,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 04:40:15,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:15,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:15,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131092752] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:15,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:15,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-17 04:40:15,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236473722] [2023-02-17 04:40:15,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:15,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 04:40:15,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:15,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 04:40:15,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-17 04:40:15,273 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:15,324 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2023-02-17 04:40:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 04:40:15,324 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-17 04:40:15,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:15,325 INFO L225 Difference]: With dead ends: 37 [2023-02-17 04:40:15,325 INFO L226 Difference]: Without dead ends: 24 [2023-02-17 04:40:15,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-02-17 04:40:15,326 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:15,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 33 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:40:15,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-17 04:40:15,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2023-02-17 04:40:15,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-02-17 04:40:15,330 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2023-02-17 04:40:15,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:15,331 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-02-17 04:40:15,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:15,331 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-02-17 04:40:15,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 04:40:15,331 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:15,332 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:15,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:15,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:15,538 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:15,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:15,538 INFO L85 PathProgramCache]: Analyzing trace with hash -298048117, now seen corresponding path program 4 times [2023-02-17 04:40:15,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:15,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784928097] [2023-02-17 04:40:15,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:15,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:15,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:15,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784928097] [2023-02-17 04:40:15,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784928097] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:15,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396257120] [2023-02-17 04:40:15,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 04:40:15,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:15,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:15,767 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:15,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 04:40:15,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 04:40:15,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:15,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-17 04:40:15,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:15,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:40:15,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2023-02-17 04:40:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:15,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:15,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-02-17 04:40:15,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-17 04:40:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:15,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396257120] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:15,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:15,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 16 [2023-02-17 04:40:15,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509120721] [2023-02-17 04:40:15,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:15,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 04:40:15,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:16,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 04:40:16,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-02-17 04:40:16,001 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:16,125 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-02-17 04:40:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 04:40:16,125 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-17 04:40:16,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:16,126 INFO L225 Difference]: With dead ends: 25 [2023-02-17 04:40:16,126 INFO L226 Difference]: Without dead ends: 23 [2023-02-17 04:40:16,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-02-17 04:40:16,128 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:16,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 46 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:40:16,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-17 04:40:16,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2023-02-17 04:40:16,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:16,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-02-17 04:40:16,134 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2023-02-17 04:40:16,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:16,135 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-02-17 04:40:16,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:16,135 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-02-17 04:40:16,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-17 04:40:16,135 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:16,135 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:16,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:16,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:16,341 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:16,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:16,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1449259246, now seen corresponding path program 5 times [2023-02-17 04:40:16,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:16,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426869284] [2023-02-17 04:40:16,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:16,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:16,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:16,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426869284] [2023-02-17 04:40:16,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426869284] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:16,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93903654] [2023-02-17 04:40:16,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 04:40:16,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:16,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:16,414 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:16,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 04:40:16,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-17 04:40:16,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:16,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 04:40:16,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:16,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:16,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93903654] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:16,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:16,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-17 04:40:16,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602780530] [2023-02-17 04:40:16,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:16,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 04:40:16,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:16,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 04:40:16,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-02-17 04:40:16,546 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:16,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:16,605 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-02-17 04:40:16,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 04:40:16,606 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 20 [2023-02-17 04:40:16,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:16,606 INFO L225 Difference]: With dead ends: 44 [2023-02-17 04:40:16,606 INFO L226 Difference]: Without dead ends: 28 [2023-02-17 04:40:16,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-02-17 04:40:16,607 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:16,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 44 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:40:16,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-17 04:40:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2023-02-17 04:40:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:16,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-02-17 04:40:16,610 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2023-02-17 04:40:16,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:16,611 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-02-17 04:40:16,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:16,611 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-02-17 04:40:16,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 04:40:16,617 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:16,617 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:16,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:16,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:16,822 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:16,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:16,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1156487496, now seen corresponding path program 6 times [2023-02-17 04:40:16,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:16,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029542779] [2023-02-17 04:40:16,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:16,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:17,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:17,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029542779] [2023-02-17 04:40:17,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029542779] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:17,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485439023] [2023-02-17 04:40:17,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 04:40:17,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:17,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:17,017 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:17,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 04:40:17,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-17 04:40:17,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:17,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-17 04:40:17,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:17,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:40:17,204 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:40:17,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 35 [2023-02-17 04:40:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:17,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:17,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-02-17 04:40:17,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-17 04:40:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:17,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485439023] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:17,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:17,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 25 [2023-02-17 04:40:17,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101692507] [2023-02-17 04:40:17,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:17,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 04:40:17,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:17,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 04:40:17,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2023-02-17 04:40:17,309 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:17,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:17,486 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2023-02-17 04:40:17,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 04:40:17,486 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-17 04:40:17,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:17,486 INFO L225 Difference]: With dead ends: 29 [2023-02-17 04:40:17,486 INFO L226 Difference]: Without dead ends: 27 [2023-02-17 04:40:17,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2023-02-17 04:40:17,487 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:17,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:40:17,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-17 04:40:17,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-02-17 04:40:17,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:17,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-02-17 04:40:17,491 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2023-02-17 04:40:17,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:17,491 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-02-17 04:40:17,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:17,492 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-02-17 04:40:17,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 04:40:17,492 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:17,492 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:17,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:17,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:17,697 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:17,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:17,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1303861707, now seen corresponding path program 7 times [2023-02-17 04:40:17,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:17,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135566089] [2023-02-17 04:40:17,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:17,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:17,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:17,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135566089] [2023-02-17 04:40:17,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135566089] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:17,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66243083] [2023-02-17 04:40:17,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 04:40:17,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:17,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:17,827 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:17,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 04:40:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:17,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 04:40:17,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:17,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:17,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66243083] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:17,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:17,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-02-17 04:40:17,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941145141] [2023-02-17 04:40:17,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:18,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-17 04:40:18,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:18,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-17 04:40:18,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-02-17 04:40:18,006 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:18,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:18,081 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2023-02-17 04:40:18,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 04:40:18,081 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-17 04:40:18,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:18,081 INFO L225 Difference]: With dead ends: 51 [2023-02-17 04:40:18,081 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 04:40:18,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 14 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-02-17 04:40:18,082 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:18,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 48 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:40:18,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 04:40:18,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2023-02-17 04:40:18,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:18,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-02-17 04:40:18,086 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2023-02-17 04:40:18,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:18,086 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-02-17 04:40:18,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:18,086 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-02-17 04:40:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 04:40:18,086 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:18,086 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:18,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:18,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-17 04:40:18,292 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:18,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1052957333, now seen corresponding path program 8 times [2023-02-17 04:40:18,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:18,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370516808] [2023-02-17 04:40:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:18,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:18,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:18,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370516808] [2023-02-17 04:40:18,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370516808] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:18,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450105246] [2023-02-17 04:40:18,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:40:18,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:18,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:18,564 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:18,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 04:40:18,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:40:18,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:18,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-17 04:40:18,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:18,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-02-17 04:40:18,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2023-02-17 04:40:18,898 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 04:40:18,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 04:40:18,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:40:18,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 28 [2023-02-17 04:40:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:18,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:19,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 68 [2023-02-17 04:40:19,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:40:19,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 286 treesize of output 290 [2023-02-17 04:40:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:19,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450105246] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:19,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:19,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 17] total 42 [2023-02-17 04:40:19,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177201019] [2023-02-17 04:40:19,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:19,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-17 04:40:19,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:19,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-17 04:40:19,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1497, Unknown=0, NotChecked=0, Total=1722 [2023-02-17 04:40:19,622 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 42 states, 42 states have (on average 1.619047619047619) internal successors, (68), 42 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:22,658 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2023-02-17 04:40:22,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-17 04:40:22,658 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.619047619047619) internal successors, (68), 42 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-17 04:40:22,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:22,659 INFO L225 Difference]: With dead ends: 69 [2023-02-17 04:40:22,659 INFO L226 Difference]: Without dead ends: 33 [2023-02-17 04:40:22,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=782, Invalid=5067, Unknown=3, NotChecked=0, Total=5852 [2023-02-17 04:40:22,662 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 124 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 64 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:22,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 141 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 523 Invalid, 1 Unknown, 0 Unchecked, 1.1s Time] [2023-02-17 04:40:22,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-17 04:40:22,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2023-02-17 04:40:22,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:22,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-02-17 04:40:22,672 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2023-02-17 04:40:22,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:22,672 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-02-17 04:40:22,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.619047619047619) internal successors, (68), 42 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:22,672 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-02-17 04:40:22,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-17 04:40:22,673 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:22,674 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:22,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:22,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:22,881 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:22,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:22,882 INFO L85 PathProgramCache]: Analyzing trace with hash 497879538, now seen corresponding path program 9 times [2023-02-17 04:40:22,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:22,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342962069] [2023-02-17 04:40:22,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:22,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:23,262 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:23,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:23,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342962069] [2023-02-17 04:40:23,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342962069] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:23,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882529811] [2023-02-17 04:40:23,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 04:40:23,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:23,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:23,278 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:23,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 04:40:23,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-17 04:40:23,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:23,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-17 04:40:23,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:23,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:40:23,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:40:23,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2023-02-17 04:40:23,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:40:23,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2023-02-17 04:40:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:23,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:23,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-02-17 04:40:23,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2023-02-17 04:40:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:23,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882529811] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:23,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:23,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2023-02-17 04:40:23,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903662057] [2023-02-17 04:40:23,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:23,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-17 04:40:23,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:23,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-17 04:40:23,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2023-02-17 04:40:23,832 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:24,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:24,186 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2023-02-17 04:40:24,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-17 04:40:24,186 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-17 04:40:24,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:24,187 INFO L225 Difference]: With dead ends: 38 [2023-02-17 04:40:24,187 INFO L226 Difference]: Without dead ends: 36 [2023-02-17 04:40:24,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 14 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1694, Unknown=0, NotChecked=0, Total=1892 [2023-02-17 04:40:24,188 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:24,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 143 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 04:40:24,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-17 04:40:24,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2023-02-17 04:40:24,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:24,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2023-02-17 04:40:24,196 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2023-02-17 04:40:24,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:24,196 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2023-02-17 04:40:24,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:24,197 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2023-02-17 04:40:24,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-17 04:40:24,197 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:24,198 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:24,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:24,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-17 04:40:24,405 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:24,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:24,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1812036939, now seen corresponding path program 10 times [2023-02-17 04:40:24,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:24,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201910884] [2023-02-17 04:40:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:24,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:24,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:24,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201910884] [2023-02-17 04:40:24,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201910884] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:24,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295193403] [2023-02-17 04:40:24,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 04:40:24,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:24,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:24,721 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:24,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 04:40:24,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 04:40:24,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:24,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-17 04:40:24,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:24,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:40:24,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:40:24,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2023-02-17 04:40:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:24,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:25,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-02-17 04:40:25,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-17 04:40:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:25,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295193403] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:25,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:25,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 28 [2023-02-17 04:40:25,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432161749] [2023-02-17 04:40:25,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:25,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-17 04:40:25,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:25,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-17 04:40:25,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2023-02-17 04:40:25,080 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:25,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:25,408 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2023-02-17 04:40:25,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-17 04:40:25,408 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-17 04:40:25,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:25,409 INFO L225 Difference]: With dead ends: 41 [2023-02-17 04:40:25,409 INFO L226 Difference]: Without dead ends: 39 [2023-02-17 04:40:25,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 20 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=1396, Unknown=0, NotChecked=0, Total=1560 [2023-02-17 04:40:25,410 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:25,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 170 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 04:40:25,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-17 04:40:25,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2023-02-17 04:40:25,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:25,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2023-02-17 04:40:25,424 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2023-02-17 04:40:25,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:25,425 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2023-02-17 04:40:25,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:25,425 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2023-02-17 04:40:25,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 04:40:25,425 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:25,425 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:25,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:25,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-17 04:40:25,631 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:25,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:25,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1046700206, now seen corresponding path program 11 times [2023-02-17 04:40:25,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:25,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988195252] [2023-02-17 04:40:25,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:25,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:25,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:25,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988195252] [2023-02-17 04:40:25,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988195252] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:25,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893376705] [2023-02-17 04:40:25,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 04:40:25,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:25,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:25,863 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:25,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 04:40:25,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-17 04:40:25,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:25,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 04:40:25,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:26,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:26,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893376705] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:26,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:26,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-02-17 04:40:26,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120488086] [2023-02-17 04:40:26,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:26,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-17 04:40:26,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:26,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-17 04:40:26,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-02-17 04:40:26,142 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:26,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:26,248 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2023-02-17 04:40:26,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-17 04:40:26,249 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-17 04:40:26,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:26,249 INFO L225 Difference]: With dead ends: 72 [2023-02-17 04:40:26,249 INFO L226 Difference]: Without dead ends: 44 [2023-02-17 04:40:26,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 23 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2023-02-17 04:40:26,250 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:26,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 78 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:40:26,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-17 04:40:26,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2023-02-17 04:40:26,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:26,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2023-02-17 04:40:26,256 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2023-02-17 04:40:26,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:26,256 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2023-02-17 04:40:26,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:26,257 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2023-02-17 04:40:26,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 04:40:26,257 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:26,257 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:26,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:26,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-17 04:40:26,463 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:26,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:26,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1382940040, now seen corresponding path program 12 times [2023-02-17 04:40:26,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:26,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940820149] [2023-02-17 04:40:26,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:26,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:26,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:26,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940820149] [2023-02-17 04:40:26,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940820149] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:26,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989140542] [2023-02-17 04:40:26,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 04:40:26,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:26,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:26,822 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:26,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 04:40:26,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-02-17 04:40:26,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:26,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 71 conjunts are in the unsatisfiable core [2023-02-17 04:40:26,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:27,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-02-17 04:40:27,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:40:27,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 67 [2023-02-17 04:40:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 19 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:27,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:28,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-02-17 04:40:28,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:40:28,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 112 [2023-02-17 04:40:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:28,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989140542] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:28,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:28,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 24] total 63 [2023-02-17 04:40:28,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353807367] [2023-02-17 04:40:28,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:28,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-17 04:40:28,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:28,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-17 04:40:28,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=3491, Unknown=0, NotChecked=0, Total=3906 [2023-02-17 04:40:28,613 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 63 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 63 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:29,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:29,861 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2023-02-17 04:40:29,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-17 04:40:29,862 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 63 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-17 04:40:29,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:29,862 INFO L225 Difference]: With dead ends: 72 [2023-02-17 04:40:29,862 INFO L226 Difference]: Without dead ends: 44 [2023-02-17 04:40:29,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1049, Invalid=8653, Unknown=0, NotChecked=0, Total=9702 [2023-02-17 04:40:29,864 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 122 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:29,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 172 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 04:40:29,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-17 04:40:29,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2023-02-17 04:40:29,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:29,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2023-02-17 04:40:29,874 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2023-02-17 04:40:29,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:29,874 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2023-02-17 04:40:29,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 63 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:29,875 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2023-02-17 04:40:29,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-17 04:40:29,875 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:29,875 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:29,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:30,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-17 04:40:30,081 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:30,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:30,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1575431467, now seen corresponding path program 13 times [2023-02-17 04:40:30,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:30,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302472114] [2023-02-17 04:40:30,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:30,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:30,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:30,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302472114] [2023-02-17 04:40:30,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302472114] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:30,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136446624] [2023-02-17 04:40:30,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 04:40:30,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:30,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:30,583 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:30,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 04:40:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:30,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-17 04:40:30,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:30,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:40:30,890 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:40:30,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 42 [2023-02-17 04:40:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:30,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:31,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 48 [2023-02-17 04:40:31,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 96 [2023-02-17 04:40:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:31,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136446624] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:31,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:31,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 50 [2023-02-17 04:40:31,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693466355] [2023-02-17 04:40:31,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:31,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-17 04:40:31,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:31,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-17 04:40:31,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2299, Unknown=0, NotChecked=0, Total=2450 [2023-02-17 04:40:31,426 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 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) [2023-02-17 04:40:32,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:32,020 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2023-02-17 04:40:32,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-17 04:40:32,020 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 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 41 [2023-02-17 04:40:32,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:32,021 INFO L225 Difference]: With dead ends: 49 [2023-02-17 04:40:32,021 INFO L226 Difference]: Without dead ends: 47 [2023-02-17 04:40:32,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 43 SyntacticMatches, 11 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=255, Invalid=3527, Unknown=0, NotChecked=0, Total=3782 [2023-02-17 04:40:32,022 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:32,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 308 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 04:40:32,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-17 04:40:32,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-02-17 04:40:32,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:32,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2023-02-17 04:40:32,030 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2023-02-17 04:40:32,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:32,031 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2023-02-17 04:40:32,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 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) [2023-02-17 04:40:32,031 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2023-02-17 04:40:32,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 04:40:32,031 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:32,031 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:32,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-17 04:40:32,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:32,233 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:32,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:32,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1718983822, now seen corresponding path program 14 times [2023-02-17 04:40:32,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:32,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405966473] [2023-02-17 04:40:32,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:32,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:32,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:32,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405966473] [2023-02-17 04:40:32,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405966473] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:32,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116818875] [2023-02-17 04:40:32,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:40:32,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:32,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:32,505 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:32,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 04:40:32,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:40:32,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:32,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 04:40:32,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:32,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:32,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116818875] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:32,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:32,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-02-17 04:40:32,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841432413] [2023-02-17 04:40:32,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:32,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-17 04:40:32,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:32,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-17 04:40:32,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-02-17 04:40:32,958 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:33,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:33,088 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2023-02-17 04:40:33,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-17 04:40:33,088 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-17 04:40:33,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:33,089 INFO L225 Difference]: With dead ends: 86 [2023-02-17 04:40:33,089 INFO L226 Difference]: Without dead ends: 52 [2023-02-17 04:40:33,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 47 SyntacticMatches, 29 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2023-02-17 04:40:33,090 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:33,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 99 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:40:33,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-17 04:40:33,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2023-02-17 04:40:33,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:33,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2023-02-17 04:40:33,102 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2023-02-17 04:40:33,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:33,103 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2023-02-17 04:40:33,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:33,103 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2023-02-17 04:40:33,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-17 04:40:33,104 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:33,104 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:33,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:33,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-17 04:40:33,309 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:33,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:33,309 INFO L85 PathProgramCache]: Analyzing trace with hash 814558120, now seen corresponding path program 15 times [2023-02-17 04:40:33,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:33,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209511511] [2023-02-17 04:40:33,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:33,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:33,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:33,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209511511] [2023-02-17 04:40:33,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209511511] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:33,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174658235] [2023-02-17 04:40:33,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 04:40:33,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:33,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:33,766 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:33,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 04:40:34,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-17 04:40:34,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:34,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-17 04:40:34,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:34,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:40:34,514 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:40:34,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2023-02-17 04:40:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:34,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:37,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-02-17 04:40:37,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2023-02-17 04:40:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 108 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:37,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174658235] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:37,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:37,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 69 [2023-02-17 04:40:37,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290161754] [2023-02-17 04:40:37,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:37,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-02-17 04:40:37,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:37,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-02-17 04:40:37,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=4242, Unknown=1, NotChecked=0, Total=4692 [2023-02-17 04:40:37,508 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 69 states, 69 states have (on average 1.855072463768116) internal successors, (128), 69 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:42,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:42,531 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2023-02-17 04:40:42,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-17 04:40:42,535 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.855072463768116) internal successors, (128), 69 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-02-17 04:40:42,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:42,535 INFO L225 Difference]: With dead ends: 86 [2023-02-17 04:40:42,535 INFO L226 Difference]: Without dead ends: 52 [2023-02-17 04:40:42,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3207 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1287, Invalid=12048, Unknown=5, NotChecked=0, Total=13340 [2023-02-17 04:40:42,540 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 110 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:42,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 397 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 04:40:42,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-17 04:40:42,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2023-02-17 04:40:42,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:42,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2023-02-17 04:40:42,579 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2023-02-17 04:40:42,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:42,579 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2023-02-17 04:40:42,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.855072463768116) internal successors, (128), 69 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:42,579 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2023-02-17 04:40:42,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 04:40:42,579 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:42,580 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:42,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:42,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-17 04:40:42,781 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:42,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:42,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1204565259, now seen corresponding path program 16 times [2023-02-17 04:40:42,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:42,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085477341] [2023-02-17 04:40:42,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:42,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:43,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:43,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085477341] [2023-02-17 04:40:43,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085477341] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:43,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316473923] [2023-02-17 04:40:43,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 04:40:43,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:43,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:43,254 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:43,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-17 04:40:43,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 04:40:43,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:43,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 61 conjunts are in the unsatisfiable core [2023-02-17 04:40:43,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:43,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:40:43,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:40:43,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 35 [2023-02-17 04:40:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:43,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:43,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-02-17 04:40:43,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-17 04:40:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:44,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316473923] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:44,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:44,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 40 [2023-02-17 04:40:44,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895930048] [2023-02-17 04:40:44,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:44,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-17 04:40:44,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:44,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-17 04:40:44,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2023-02-17 04:40:44,027 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:44,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:44,496 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2023-02-17 04:40:44,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-17 04:40:44,496 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 0 states have call successors, (0), 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 49 [2023-02-17 04:40:44,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:44,496 INFO L225 Difference]: With dead ends: 57 [2023-02-17 04:40:44,496 INFO L226 Difference]: Without dead ends: 55 [2023-02-17 04:40:44,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 52 SyntacticMatches, 32 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=234, Invalid=2958, Unknown=0, NotChecked=0, Total=3192 [2023-02-17 04:40:44,498 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:44,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 349 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 04:40:44,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-17 04:40:44,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-02-17 04:40:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-02-17 04:40:44,506 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2023-02-17 04:40:44,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:44,506 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-02-17 04:40:44,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-02-17 04:40:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-17 04:40:44,507 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:44,507 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:44,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:44,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:44,713 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:44,713 INFO L85 PathProgramCache]: Analyzing trace with hash 756666258, now seen corresponding path program 17 times [2023-02-17 04:40:44,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:44,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821734329] [2023-02-17 04:40:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:44,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:44,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:44,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821734329] [2023-02-17 04:40:44,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821734329] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:44,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912343195] [2023-02-17 04:40:44,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 04:40:44,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:44,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:44,975 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:45,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-17 04:40:45,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-02-17 04:40:45,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:45,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-17 04:40:45,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:45,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:45,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912343195] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:45,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:45,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-02-17 04:40:45,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865335721] [2023-02-17 04:40:45,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:45,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-17 04:40:45,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:45,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-17 04:40:45,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2023-02-17 04:40:45,525 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:45,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:45,669 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2023-02-17 04:40:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-17 04:40:45,669 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 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 52 [2023-02-17 04:40:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:45,670 INFO L225 Difference]: With dead ends: 100 [2023-02-17 04:40:45,670 INFO L226 Difference]: Without dead ends: 60 [2023-02-17 04:40:45,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 55 SyntacticMatches, 35 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2023-02-17 04:40:45,671 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 87 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:45,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 105 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:40:45,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-17 04:40:45,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2023-02-17 04:40:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2023-02-17 04:40:45,679 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2023-02-17 04:40:45,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:45,679 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2023-02-17 04:40:45,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:45,679 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2023-02-17 04:40:45,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-17 04:40:45,680 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:45,680 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:45,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:45,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:45,885 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:45,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:45,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1598292424, now seen corresponding path program 18 times [2023-02-17 04:40:45,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:45,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503752156] [2023-02-17 04:40:45,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:45,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:46,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:46,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503752156] [2023-02-17 04:40:46,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503752156] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:46,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546514725] [2023-02-17 04:40:46,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 04:40:46,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:46,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:46,413 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:46,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-17 04:40:46,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-02-17 04:40:46,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:46,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-17 04:40:46,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:46,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:40:47,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:40:47,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2023-02-17 04:40:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:47,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:47,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-02-17 04:40:47,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-17 04:40:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:47,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546514725] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:47,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:47,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 43 [2023-02-17 04:40:47,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71282296] [2023-02-17 04:40:47,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:47,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-17 04:40:47,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:47,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-17 04:40:47,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1692, Unknown=0, NotChecked=0, Total=1806 [2023-02-17 04:40:47,403 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:48,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:48,109 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2023-02-17 04:40:48,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-17 04:40:48,110 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 0 states have call successors, (0), 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 53 [2023-02-17 04:40:48,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:48,110 INFO L225 Difference]: With dead ends: 61 [2023-02-17 04:40:48,110 INFO L226 Difference]: Without dead ends: 59 [2023-02-17 04:40:48,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 56 SyntacticMatches, 35 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=231, Invalid=3191, Unknown=0, NotChecked=0, Total=3422 [2023-02-17 04:40:48,111 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:48,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 433 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1495 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 04:40:48,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-17 04:40:48,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2023-02-17 04:40:48,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-02-17 04:40:48,121 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2023-02-17 04:40:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:48,121 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-02-17 04:40:48,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:48,121 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-02-17 04:40:48,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-17 04:40:48,122 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:48,122 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:48,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-17 04:40:48,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:48,327 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:48,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:48,328 INFO L85 PathProgramCache]: Analyzing trace with hash 726953397, now seen corresponding path program 19 times [2023-02-17 04:40:48,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:48,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715007013] [2023-02-17 04:40:48,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:48,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:48,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:48,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715007013] [2023-02-17 04:40:48,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715007013] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:48,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267686240] [2023-02-17 04:40:48,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 04:40:48,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:48,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:48,637 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:48,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-17 04:40:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:48,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-17 04:40:48,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:49,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:49,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267686240] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:49,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:49,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2023-02-17 04:40:49,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52906803] [2023-02-17 04:40:49,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:49,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-17 04:40:49,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:49,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-17 04:40:49,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2023-02-17 04:40:49,229 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:49,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:49,398 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2023-02-17 04:40:49,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-17 04:40:49,398 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-02-17 04:40:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:49,399 INFO L225 Difference]: With dead ends: 107 [2023-02-17 04:40:49,399 INFO L226 Difference]: Without dead ends: 64 [2023-02-17 04:40:49,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 59 SyntacticMatches, 38 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=765, Invalid=2427, Unknown=0, NotChecked=0, Total=3192 [2023-02-17 04:40:49,402 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 113 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:49,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 122 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:40:49,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-17 04:40:49,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2023-02-17 04:40:49,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2023-02-17 04:40:49,414 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2023-02-17 04:40:49,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:49,415 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2023-02-17 04:40:49,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:49,415 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2023-02-17 04:40:49,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-17 04:40:49,415 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:49,415 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:49,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:49,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-17 04:40:49,622 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:49,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:49,622 INFO L85 PathProgramCache]: Analyzing trace with hash -66153237, now seen corresponding path program 20 times [2023-02-17 04:40:49,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:49,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039697843] [2023-02-17 04:40:49,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:49,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:50,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:50,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039697843] [2023-02-17 04:40:50,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039697843] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:50,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148928143] [2023-02-17 04:40:50,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:40:50,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:50,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:50,366 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:50,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-17 04:40:50,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:40:50,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:50,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-17 04:40:50,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:50,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:40:50,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 101 [2023-02-17 04:40:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:50,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:51,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 64 [2023-02-17 04:40:51,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 128 [2023-02-17 04:40:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:51,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148928143] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:51,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:51,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 58 [2023-02-17 04:40:51,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083971537] [2023-02-17 04:40:51,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:51,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-17 04:40:51,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:51,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-17 04:40:51,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3139, Unknown=0, NotChecked=0, Total=3306 [2023-02-17 04:40:51,695 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 58 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:52,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:52,752 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2023-02-17 04:40:52,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-17 04:40:52,753 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 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 57 [2023-02-17 04:40:52,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:52,761 INFO L225 Difference]: With dead ends: 65 [2023-02-17 04:40:52,761 INFO L226 Difference]: Without dead ends: 63 [2023-02-17 04:40:52,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 59 SyntacticMatches, 27 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=294, Invalid=5108, Unknown=0, NotChecked=0, Total=5402 [2023-02-17 04:40:52,765 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:52,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 663 Invalid, 1922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1908 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 04:40:52,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-17 04:40:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2023-02-17 04:40:52,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2023-02-17 04:40:52,785 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 57 [2023-02-17 04:40:52,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:52,785 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2023-02-17 04:40:52,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2023-02-17 04:40:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-17 04:40:52,786 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:52,786 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:52,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:52,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-17 04:40:52,991 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:52,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:52,992 INFO L85 PathProgramCache]: Analyzing trace with hash 623698866, now seen corresponding path program 21 times [2023-02-17 04:40:52,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:52,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338901121] [2023-02-17 04:40:52,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:52,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:53,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:53,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338901121] [2023-02-17 04:40:53,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338901121] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:53,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978627970] [2023-02-17 04:40:53,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 04:40:53,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:53,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:53,443 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:53,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-17 04:40:54,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-02-17 04:40:54,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:54,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-17 04:40:54,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:54,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:54,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978627970] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:54,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:54,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-02-17 04:40:54,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983566138] [2023-02-17 04:40:54,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:54,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-17 04:40:54,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:54,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-17 04:40:54,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2023-02-17 04:40:54,638 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:54,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:54,843 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2023-02-17 04:40:54,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-17 04:40:54,843 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 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 60 [2023-02-17 04:40:54,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:54,844 INFO L225 Difference]: With dead ends: 114 [2023-02-17 04:40:54,844 INFO L226 Difference]: Without dead ends: 68 [2023-02-17 04:40:54,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 63 SyntacticMatches, 41 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2023-02-17 04:40:54,845 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 165 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:54,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 109 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:40:54,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-17 04:40:54,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2023-02-17 04:40:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2023-02-17 04:40:54,863 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2023-02-17 04:40:54,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:54,863 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2023-02-17 04:40:54,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:54,867 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2023-02-17 04:40:54,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-17 04:40:54,868 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:54,868 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:54,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:55,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:55,078 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:55,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:55,078 INFO L85 PathProgramCache]: Analyzing trace with hash 829718504, now seen corresponding path program 22 times [2023-02-17 04:40:55,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:55,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845070505] [2023-02-17 04:40:55,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:55,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:55,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:55,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845070505] [2023-02-17 04:40:55,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845070505] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:55,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696822267] [2023-02-17 04:40:55,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 04:40:55,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:55,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:55,673 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:55,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-17 04:40:55,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 04:40:55,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:55,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-17 04:40:55,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:55,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:40:56,316 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:40:56,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 31 [2023-02-17 04:40:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:56,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:56,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-02-17 04:40:56,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-17 04:40:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:56,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696822267] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:56,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:56,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 49 [2023-02-17 04:40:56,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183438134] [2023-02-17 04:40:56,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:56,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-17 04:40:56,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:56,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-17 04:40:56,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2222, Unknown=0, NotChecked=0, Total=2352 [2023-02-17 04:40:56,690 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:57,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:57,559 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2023-02-17 04:40:57,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-17 04:40:57,559 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-02-17 04:40:57,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:57,560 INFO L225 Difference]: With dead ends: 69 [2023-02-17 04:40:57,560 INFO L226 Difference]: Without dead ends: 67 [2023-02-17 04:40:57,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 64 SyntacticMatches, 41 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=279, Invalid=4413, Unknown=0, NotChecked=0, Total=4692 [2023-02-17 04:40:57,561 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 1921 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:57,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 565 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1921 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 04:40:57,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-17 04:40:57,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2023-02-17 04:40:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2023-02-17 04:40:57,571 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 61 [2023-02-17 04:40:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:57,571 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2023-02-17 04:40:57,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2023-02-17 04:40:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-17 04:40:57,572 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:57,572 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:57,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:57,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:57,782 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:57,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:57,783 INFO L85 PathProgramCache]: Analyzing trace with hash 611957653, now seen corresponding path program 23 times [2023-02-17 04:40:57,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:57,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573266912] [2023-02-17 04:40:57,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:57,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:40:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:58,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:40:58,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573266912] [2023-02-17 04:40:58,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573266912] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:40:58,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801348102] [2023-02-17 04:40:58,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 04:40:58,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:40:58,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:40:58,209 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:40:58,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-17 04:40:58,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-02-17 04:40:58,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:40:58,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-17 04:40:58,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:40:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:58,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:40:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:40:58,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801348102] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:40:58,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:40:58,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-02-17 04:40:58,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575616587] [2023-02-17 04:40:58,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:40:58,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-17 04:40:58,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:40:58,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-17 04:40:58,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-02-17 04:40:58,997 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:59,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:40:59,205 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2023-02-17 04:40:59,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-17 04:40:59,205 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 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 64 [2023-02-17 04:40:59,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:40:59,205 INFO L225 Difference]: With dead ends: 121 [2023-02-17 04:40:59,205 INFO L226 Difference]: Without dead ends: 72 [2023-02-17 04:40:59,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 67 SyntacticMatches, 44 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2023-02-17 04:40:59,207 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:40:59,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 142 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:40:59,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-17 04:40:59,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2023-02-17 04:40:59,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:59,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2023-02-17 04:40:59,218 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2023-02-17 04:40:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:40:59,218 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2023-02-17 04:40:59,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:40:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2023-02-17 04:40:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-17 04:40:59,219 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:40:59,219 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:40:59,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-17 04:40:59,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-17 04:40:59,425 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:40:59,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:40:59,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1317817547, now seen corresponding path program 24 times [2023-02-17 04:40:59,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:40:59,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013295399] [2023-02-17 04:40:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:40:59,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:40:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:00,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:41:00,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013295399] [2023-02-17 04:41:00,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013295399] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:41:00,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288339865] [2023-02-17 04:41:00,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 04:41:00,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:00,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:41:00,264 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:41:00,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-17 04:41:00,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2023-02-17 04:41:00,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:41:00,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-17 04:41:00,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:41:00,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:41:01,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:41:01,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2023-02-17 04:41:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:01,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:41:01,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-02-17 04:41:01,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-17 04:41:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:02,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288339865] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:41:02,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:41:02,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 52 [2023-02-17 04:41:02,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121893567] [2023-02-17 04:41:02,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:41:02,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-17 04:41:02,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:41:02,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-17 04:41:02,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2514, Unknown=0, NotChecked=0, Total=2652 [2023-02-17 04:41:02,066 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:03,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:41:03,100 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2023-02-17 04:41:03,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-17 04:41:03,101 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 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 65 [2023-02-17 04:41:03,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:41:03,101 INFO L225 Difference]: With dead ends: 73 [2023-02-17 04:41:03,101 INFO L226 Difference]: Without dead ends: 71 [2023-02-17 04:41:03,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 68 SyntacticMatches, 44 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=294, Invalid=4962, Unknown=0, NotChecked=0, Total=5256 [2023-02-17 04:41:03,102 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 2106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 04:41:03,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 622 Invalid, 2106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2088 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 04:41:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-02-17 04:41:03,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2023-02-17 04:41:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:03,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2023-02-17 04:41:03,113 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 65 [2023-02-17 04:41:03,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:41:03,113 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2023-02-17 04:41:03,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:03,113 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2023-02-17 04:41:03,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-17 04:41:03,113 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:41:03,114 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:41:03,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-17 04:41:03,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-17 04:41:03,319 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:41:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:41:03,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1188716590, now seen corresponding path program 25 times [2023-02-17 04:41:03,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:41:03,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784029564] [2023-02-17 04:41:03,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:41:03,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:41:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:03,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:41:03,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784029564] [2023-02-17 04:41:03,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784029564] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:41:03,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902241531] [2023-02-17 04:41:03,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 04:41:03,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:03,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:41:03,797 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:41:03,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-17 04:41:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:03,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-17 04:41:03,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:41:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:04,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:41:04,551 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:04,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902241531] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:41:04,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:41:04,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2023-02-17 04:41:04,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516043896] [2023-02-17 04:41:04,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:41:04,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-17 04:41:04,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:41:04,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-17 04:41:04,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2023-02-17 04:41:04,554 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:04,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:41:04,725 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2023-02-17 04:41:04,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-17 04:41:04,725 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-02-17 04:41:04,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:41:04,725 INFO L225 Difference]: With dead ends: 128 [2023-02-17 04:41:04,726 INFO L226 Difference]: Without dead ends: 76 [2023-02-17 04:41:04,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 71 SyntacticMatches, 47 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2023-02-17 04:41:04,727 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 139 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:41:04,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 141 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:41:04,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-17 04:41:04,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2023-02-17 04:41:04,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:04,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2023-02-17 04:41:04,738 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2023-02-17 04:41:04,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:41:04,738 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2023-02-17 04:41:04,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:04,739 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2023-02-17 04:41:04,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-17 04:41:04,739 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:41:04,739 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:41:04,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-17 04:41:04,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-17 04:41:04,944 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:41:04,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:41:04,945 INFO L85 PathProgramCache]: Analyzing trace with hash -2004834808, now seen corresponding path program 26 times [2023-02-17 04:41:04,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:41:04,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807053439] [2023-02-17 04:41:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:41:04,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:41:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:05,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:41:05,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807053439] [2023-02-17 04:41:05,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807053439] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:41:05,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592715571] [2023-02-17 04:41:05,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:41:05,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:05,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:41:05,707 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:41:05,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-17 04:41:05,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:41:05,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:41:05,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 110 conjunts are in the unsatisfiable core [2023-02-17 04:41:05,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:41:06,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-02-17 04:41:06,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 26 [2023-02-17 04:41:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:07,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:41:07,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-02-17 04:41:07,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-17 04:41:07,478 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:07,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592715571] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:41:07,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:41:07,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 71 [2023-02-17 04:41:07,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779167493] [2023-02-17 04:41:07,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:41:07,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-02-17 04:41:07,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:41:07,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-02-17 04:41:07,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=4762, Unknown=0, NotChecked=0, Total=4970 [2023-02-17 04:41:07,480 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 71 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:08,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:41:08,728 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2023-02-17 04:41:08,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-17 04:41:08,729 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 71 states have internal predecessors, (139), 0 states have call successors, (0), 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 69 [2023-02-17 04:41:08,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:41:08,729 INFO L225 Difference]: With dead ends: 77 [2023-02-17 04:41:08,729 INFO L226 Difference]: Without dead ends: 75 [2023-02-17 04:41:08,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 72 SyntacticMatches, 31 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2036 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=360, Invalid=7650, Unknown=0, NotChecked=0, Total=8010 [2023-02-17 04:41:08,735 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 2743 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 2760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 04:41:08,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 898 Invalid, 2760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2743 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-17 04:41:08,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-17 04:41:08,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2023-02-17 04:41:08,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2023-02-17 04:41:08,747 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 69 [2023-02-17 04:41:08,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:41:08,748 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2023-02-17 04:41:08,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 71 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:08,748 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2023-02-17 04:41:08,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-17 04:41:08,749 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:41:08,749 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:41:08,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-17 04:41:08,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-17 04:41:08,955 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:41:08,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:41:08,955 INFO L85 PathProgramCache]: Analyzing trace with hash -213753483, now seen corresponding path program 27 times [2023-02-17 04:41:08,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:41:08,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59033597] [2023-02-17 04:41:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:41:08,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:41:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:09,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:41:09,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59033597] [2023-02-17 04:41:09,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59033597] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:41:09,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786240141] [2023-02-17 04:41:09,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 04:41:09,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:09,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:41:09,331 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:41:09,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-17 04:41:10,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2023-02-17 04:41:10,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:41:10,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-17 04:41:10,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:41:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:10,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:41:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:10,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786240141] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:41:10,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:41:10,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2023-02-17 04:41:10,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728878663] [2023-02-17 04:41:10,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:41:10,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-17 04:41:10,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:41:10,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-17 04:41:10,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2023-02-17 04:41:10,673 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 56 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:10,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:41:10,841 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2023-02-17 04:41:10,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-17 04:41:10,841 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 56 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2023-02-17 04:41:10,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:41:10,842 INFO L225 Difference]: With dead ends: 135 [2023-02-17 04:41:10,842 INFO L226 Difference]: Without dead ends: 80 [2023-02-17 04:41:10,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 75 SyntacticMatches, 50 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2633 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1235, Invalid=4021, Unknown=0, NotChecked=0, Total=5256 [2023-02-17 04:41:10,847 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 179 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:41:10,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 151 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:41:10,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-17 04:41:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2023-02-17 04:41:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2023-02-17 04:41:10,862 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2023-02-17 04:41:10,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:41:10,862 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2023-02-17 04:41:10,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 56 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:10,862 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2023-02-17 04:41:10,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-17 04:41:10,862 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:41:10,863 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:41:10,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-17 04:41:11,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:11,069 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:41:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:41:11,069 INFO L85 PathProgramCache]: Analyzing trace with hash -190620501, now seen corresponding path program 28 times [2023-02-17 04:41:11,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:41:11,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296795010] [2023-02-17 04:41:11,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:41:11,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:41:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:12,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:41:12,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296795010] [2023-02-17 04:41:12,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296795010] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:41:12,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171720941] [2023-02-17 04:41:12,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 04:41:12,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:12,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:41:12,098 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:41:12,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-17 04:41:12,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 04:41:12,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:41:12,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 87 conjunts are in the unsatisfiable core [2023-02-17 04:41:12,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:41:12,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:41:13,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:41:13,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 38 [2023-02-17 04:41:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:13,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:41:13,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 80 [2023-02-17 04:41:13,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 160 [2023-02-17 04:41:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:14,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171720941] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:41:14,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:41:14,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 39] total 92 [2023-02-17 04:41:14,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411367136] [2023-02-17 04:41:14,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:41:14,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-02-17 04:41:14,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:41:14,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-02-17 04:41:14,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=8082, Unknown=0, NotChecked=0, Total=8372 [2023-02-17 04:41:14,718 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 92 states, 92 states have (on average 2.0869565217391304) internal successors, (192), 92 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:41:16,319 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2023-02-17 04:41:16,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-17 04:41:16,319 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0869565217391304) internal successors, (192), 92 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2023-02-17 04:41:16,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:41:16,320 INFO L225 Difference]: With dead ends: 81 [2023-02-17 04:41:16,320 INFO L226 Difference]: Without dead ends: 79 [2023-02-17 04:41:16,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 73 SyntacticMatches, 19 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=490, Invalid=12392, Unknown=0, NotChecked=0, Total=12882 [2023-02-17 04:41:16,321 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 44 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 3088 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 3109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 04:41:16,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 973 Invalid, 3109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 3088 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-17 04:41:16,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-17 04:41:16,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2023-02-17 04:41:16,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2023-02-17 04:41:16,335 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 73 [2023-02-17 04:41:16,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:41:16,335 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2023-02-17 04:41:16,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0869565217391304) internal successors, (192), 92 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:16,335 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2023-02-17 04:41:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-17 04:41:16,336 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:41:16,336 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:41:16,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-17 04:41:16,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:16,538 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:41:16,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:41:16,539 INFO L85 PathProgramCache]: Analyzing trace with hash -823786510, now seen corresponding path program 29 times [2023-02-17 04:41:16,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:41:16,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209216988] [2023-02-17 04:41:16,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:41:16,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:41:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 393 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:17,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:41:17,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209216988] [2023-02-17 04:41:17,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209216988] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:41:17,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308201612] [2023-02-17 04:41:17,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 04:41:17,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:17,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:41:17,075 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:41:17,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-17 04:41:17,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2023-02-17 04:41:17,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:41:17,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-17 04:41:17,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:41:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:18,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:41:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:18,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308201612] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:41:18,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:41:18,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2023-02-17 04:41:18,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814595818] [2023-02-17 04:41:18,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:41:18,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-17 04:41:18,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:41:18,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-17 04:41:18,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=2619, Unknown=0, NotChecked=0, Total=3422 [2023-02-17 04:41:18,478 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 59 states, 59 states have (on average 2.288135593220339) internal successors, (135), 59 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:41:18,770 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2023-02-17 04:41:18,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-17 04:41:18,771 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.288135593220339) internal successors, (135), 59 states have internal predecessors, (135), 0 states have call successors, (0), 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 76 [2023-02-17 04:41:18,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:41:18,772 INFO L225 Difference]: With dead ends: 142 [2023-02-17 04:41:18,772 INFO L226 Difference]: Without dead ends: 84 [2023-02-17 04:41:18,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 79 SyntacticMatches, 53 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2933 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1370, Invalid=4482, Unknown=0, NotChecked=0, Total=5852 [2023-02-17 04:41:18,773 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 247 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:41:18,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 148 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 04:41:18,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-17 04:41:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2023-02-17 04:41:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:18,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2023-02-17 04:41:18,794 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2023-02-17 04:41:18,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:41:18,795 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2023-02-17 04:41:18,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.288135593220339) internal successors, (135), 59 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:18,795 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2023-02-17 04:41:18,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-02-17 04:41:18,796 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:41:18,796 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:41:18,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-02-17 04:41:19,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-02-17 04:41:19,003 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:41:19,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:41:19,003 INFO L85 PathProgramCache]: Analyzing trace with hash -196447192, now seen corresponding path program 30 times [2023-02-17 04:41:19,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:41:19,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294975716] [2023-02-17 04:41:19,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:41:19,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:41:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:19,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:41:19,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294975716] [2023-02-17 04:41:19,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294975716] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:41:19,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964543066] [2023-02-17 04:41:19,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 04:41:19,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:19,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:41:19,968 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:41:19,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-17 04:41:21,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2023-02-17 04:41:21,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:41:21,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 84 conjunts are in the unsatisfiable core [2023-02-17 04:41:21,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:41:21,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:41:21,812 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:41:21,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2023-02-17 04:41:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:21,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:41:22,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-02-17 04:41:22,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-17 04:41:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:22,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964543066] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:41:22,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:41:22,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 59 [2023-02-17 04:41:22,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687681539] [2023-02-17 04:41:22,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:41:22,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-17 04:41:22,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:41:22,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-17 04:41:22,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=3270, Unknown=0, NotChecked=0, Total=3422 [2023-02-17 04:41:22,411 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 59 states, 59 states have (on average 2.23728813559322) internal successors, (132), 59 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:23,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:41:23,517 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2023-02-17 04:41:23,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-17 04:41:23,517 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.23728813559322) internal successors, (132), 59 states have internal predecessors, (132), 0 states have call successors, (0), 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 77 [2023-02-17 04:41:23,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:41:23,518 INFO L225 Difference]: With dead ends: 85 [2023-02-17 04:41:23,518 INFO L226 Difference]: Without dead ends: 83 [2023-02-17 04:41:23,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 82 SyntacticMatches, 53 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=298, Invalid=6022, Unknown=0, NotChecked=0, Total=6320 [2023-02-17 04:41:23,519 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 2749 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 2768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-17 04:41:23,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 902 Invalid, 2768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2749 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-17 04:41:23,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-17 04:41:23,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2023-02-17 04:41:23,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:23,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2023-02-17 04:41:23,545 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 77 [2023-02-17 04:41:23,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:41:23,545 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2023-02-17 04:41:23,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.23728813559322) internal successors, (132), 59 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:23,546 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2023-02-17 04:41:23,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-17 04:41:23,546 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:41:23,546 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:41:23,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-02-17 04:41:23,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:23,755 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:41:23,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:41:23,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1686921045, now seen corresponding path program 31 times [2023-02-17 04:41:23,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:41:23,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896112626] [2023-02-17 04:41:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:41:23,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:41:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 443 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:24,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:41:24,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896112626] [2023-02-17 04:41:24,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896112626] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:41:24,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071198332] [2023-02-17 04:41:24,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 04:41:24,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:24,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:41:24,417 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:41:24,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-17 04:41:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:24,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-17 04:41:24,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:41:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:25,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:41:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:25,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071198332] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:41:25,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:41:25,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 62 [2023-02-17 04:41:25,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35997856] [2023-02-17 04:41:25,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:41:25,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-17 04:41:25,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:41:25,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-17 04:41:25,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=2897, Unknown=0, NotChecked=0, Total=3782 [2023-02-17 04:41:25,599 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 62 states, 62 states have (on average 2.2903225806451615) internal successors, (142), 62 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:25,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:41:25,870 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2023-02-17 04:41:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-17 04:41:25,871 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.2903225806451615) internal successors, (142), 62 states have internal predecessors, (142), 0 states have call successors, (0), 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 80 [2023-02-17 04:41:25,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:41:25,871 INFO L225 Difference]: With dead ends: 149 [2023-02-17 04:41:25,871 INFO L226 Difference]: Without dead ends: 88 [2023-02-17 04:41:25,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 83 SyntacticMatches, 56 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3249 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1512, Invalid=4968, Unknown=0, NotChecked=0, Total=6480 [2023-02-17 04:41:25,872 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 205 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:41:25,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 149 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:41:25,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-17 04:41:25,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2023-02-17 04:41:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:25,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2023-02-17 04:41:25,887 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2023-02-17 04:41:25,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:41:25,887 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2023-02-17 04:41:25,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.2903225806451615) internal successors, (142), 62 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2023-02-17 04:41:25,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-17 04:41:25,888 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:41:25,888 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:41:25,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-17 04:41:26,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:26,093 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:41:26,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:41:26,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1697760395, now seen corresponding path program 32 times [2023-02-17 04:41:26,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:41:26,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525382791] [2023-02-17 04:41:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:41:26,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:41:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:26,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:41:26,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525382791] [2023-02-17 04:41:26,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525382791] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:41:26,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122770854] [2023-02-17 04:41:26,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:41:26,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:26,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:41:27,000 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:41:27,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-17 04:41:27,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:41:27,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:41:27,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 128 conjunts are in the unsatisfiable core [2023-02-17 04:41:27,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:41:27,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:41:28,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2023-02-17 04:41:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:28,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:41:29,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-02-17 04:41:29,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-17 04:41:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:29,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122770854] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:41:29,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:41:29,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 83 [2023-02-17 04:41:29,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40856641] [2023-02-17 04:41:29,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:41:29,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-02-17 04:41:29,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:41:29,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-02-17 04:41:29,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=6562, Unknown=0, NotChecked=0, Total=6806 [2023-02-17 04:41:29,355 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 83 states, 83 states have (on average 1.963855421686747) internal successors, (163), 83 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:30,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:41:30,624 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2023-02-17 04:41:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-17 04:41:30,624 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.963855421686747) internal successors, (163), 83 states have internal predecessors, (163), 0 states have call successors, (0), 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 81 [2023-02-17 04:41:30,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:41:30,625 INFO L225 Difference]: With dead ends: 89 [2023-02-17 04:41:30,625 INFO L226 Difference]: Without dead ends: 87 [2023-02-17 04:41:30,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 84 SyntacticMatches, 37 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2816 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=420, Invalid=10500, Unknown=0, NotChecked=0, Total=10920 [2023-02-17 04:41:30,626 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 43 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 3495 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 3516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 04:41:30,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 1196 Invalid, 3516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 3495 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-17 04:41:30,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-02-17 04:41:30,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2023-02-17 04:41:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:30,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2023-02-17 04:41:30,642 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 81 [2023-02-17 04:41:30,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:41:30,642 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2023-02-17 04:41:30,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.963855421686747) internal successors, (163), 83 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:30,643 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2023-02-17 04:41:30,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-17 04:41:30,643 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:41:30,643 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:41:30,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-02-17 04:41:30,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-02-17 04:41:30,849 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:41:30,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:41:30,849 INFO L85 PathProgramCache]: Analyzing trace with hash 449843218, now seen corresponding path program 33 times [2023-02-17 04:41:30,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:41:30,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630376465] [2023-02-17 04:41:30,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:41:30,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:41:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 496 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:31,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:41:31,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630376465] [2023-02-17 04:41:31,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630376465] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:41:31,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495240641] [2023-02-17 04:41:31,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 04:41:31,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:31,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:41:31,444 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:41:31,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-17 04:41:32,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2023-02-17 04:41:32,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:41:32,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-17 04:41:32,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:41:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:33,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:41:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:34,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495240641] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:41:34,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:41:34,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2023-02-17 04:41:34,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571227440] [2023-02-17 04:41:34,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:41:34,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-17 04:41:34,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:41:34,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-17 04:41:34,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=3189, Unknown=0, NotChecked=0, Total=4160 [2023-02-17 04:41:34,036 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:34,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:41:34,353 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2023-02-17 04:41:34,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-17 04:41:34,354 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 0 states have call successors, (0), 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 84 [2023-02-17 04:41:34,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:41:34,354 INFO L225 Difference]: With dead ends: 156 [2023-02-17 04:41:34,354 INFO L226 Difference]: Without dead ends: 92 [2023-02-17 04:41:34,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 87 SyntacticMatches, 59 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3581 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1661, Invalid=5479, Unknown=0, NotChecked=0, Total=7140 [2023-02-17 04:41:34,356 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 197 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:41:34,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 189 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 04:41:34,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-17 04:41:34,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2023-02-17 04:41:34,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:34,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2023-02-17 04:41:34,385 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2023-02-17 04:41:34,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:41:34,385 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2023-02-17 04:41:34,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:34,385 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2023-02-17 04:41:34,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-02-17 04:41:34,386 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:41:34,386 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:41:34,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-02-17 04:41:34,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-02-17 04:41:34,589 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:41:34,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:41:34,589 INFO L85 PathProgramCache]: Analyzing trace with hash -751572408, now seen corresponding path program 34 times [2023-02-17 04:41:34,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:41:34,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112345945] [2023-02-17 04:41:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:41:34,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:41:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:35,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:41:35,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112345945] [2023-02-17 04:41:35,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112345945] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:41:35,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776667476] [2023-02-17 04:41:35,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 04:41:35,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:35,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:41:35,709 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:41:35,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-17 04:41:36,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 04:41:36,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:41:36,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 99 conjunts are in the unsatisfiable core [2023-02-17 04:41:36,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:41:37,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:41:38,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:41:38,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 27 [2023-02-17 04:41:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:38,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:41:39,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-02-17 04:41:39,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-17 04:41:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:39,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776667476] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:41:39,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:41:39,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 108 [2023-02-17 04:41:39,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904014922] [2023-02-17 04:41:39,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:41:39,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-02-17 04:41:39,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:41:39,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-02-17 04:41:39,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=11192, Unknown=0, NotChecked=0, Total=11556 [2023-02-17 04:41:39,472 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 108 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:41,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:41:41,103 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2023-02-17 04:41:41,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-02-17 04:41:41,104 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 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 85 [2023-02-17 04:41:41,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:41:41,104 INFO L225 Difference]: With dead ends: 93 [2023-02-17 04:41:41,105 INFO L226 Difference]: Without dead ends: 91 [2023-02-17 04:41:41,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 85 SyntacticMatches, 21 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4453 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=592, Invalid=16964, Unknown=0, NotChecked=0, Total=17556 [2023-02-17 04:41:41,106 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 4231 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 4254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:41:41,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1394 Invalid, 4254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 4231 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-17 04:41:41,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-17 04:41:41,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2023-02-17 04:41:41,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:41,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2023-02-17 04:41:41,123 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 85 [2023-02-17 04:41:41,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:41:41,123 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2023-02-17 04:41:41,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:41,124 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2023-02-17 04:41:41,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-02-17 04:41:41,124 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:41:41,124 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:41:41,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-02-17 04:41:41,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-17 04:41:41,331 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:41:41,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:41:41,331 INFO L85 PathProgramCache]: Analyzing trace with hash -424299211, now seen corresponding path program 35 times [2023-02-17 04:41:41,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:41:41,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360727872] [2023-02-17 04:41:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:41:41,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:41:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 552 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:42,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:41:42,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360727872] [2023-02-17 04:41:42,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360727872] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:41:42,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161063412] [2023-02-17 04:41:42,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 04:41:42,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:42,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:41:42,008 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:41:42,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-17 04:41:43,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2023-02-17 04:41:43,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:41:43,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-17 04:41:43,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:41:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:44,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:41:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:44,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161063412] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:41:44,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:41:44,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 68 [2023-02-17 04:41:44,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968127092] [2023-02-17 04:41:44,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:41:44,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-17 04:41:44,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:41:44,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-17 04:41:44,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=3495, Unknown=0, NotChecked=0, Total=4556 [2023-02-17 04:41:44,450 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 68 states, 68 states have (on average 2.2941176470588234) internal successors, (156), 68 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:44,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:41:44,793 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2023-02-17 04:41:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-17 04:41:44,793 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.2941176470588234) internal successors, (156), 68 states have internal predecessors, (156), 0 states have call successors, (0), 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 88 [2023-02-17 04:41:44,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:41:44,794 INFO L225 Difference]: With dead ends: 163 [2023-02-17 04:41:44,794 INFO L226 Difference]: Without dead ends: 96 [2023-02-17 04:41:44,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 91 SyntacticMatches, 62 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3929 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1817, Invalid=6015, Unknown=0, NotChecked=0, Total=7832 [2023-02-17 04:41:44,795 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 193 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:41:44,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 192 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 04:41:44,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-17 04:41:44,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2023-02-17 04:41:44,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:44,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2023-02-17 04:41:44,813 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 88 [2023-02-17 04:41:44,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:41:44,813 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2023-02-17 04:41:44,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.2941176470588234) internal successors, (156), 68 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:44,813 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2023-02-17 04:41:44,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-02-17 04:41:44,814 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:41:44,814 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:41:44,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-02-17 04:41:45,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:45,021 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:41:45,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:41:45,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1198160789, now seen corresponding path program 36 times [2023-02-17 04:41:45,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:41:45,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849900733] [2023-02-17 04:41:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:41:45,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:41:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:46,417 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:46,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:41:46,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849900733] [2023-02-17 04:41:46,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849900733] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:41:46,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476596731] [2023-02-17 04:41:46,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 04:41:46,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:46,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:41:46,418 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:41:46,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-17 04:41:48,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2023-02-17 04:41:48,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:41:48,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 103 conjunts are in the unsatisfiable core [2023-02-17 04:41:48,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:41:48,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:41:49,467 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:41:49,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 38 [2023-02-17 04:41:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:49,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:41:50,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 96 [2023-02-17 04:41:50,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 192 [2023-02-17 04:41:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:52,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476596731] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:41:52,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:41:52,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 47, 47] total 112 [2023-02-17 04:41:52,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396409695] [2023-02-17 04:41:52,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:41:52,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2023-02-17 04:41:52,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:41:52,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2023-02-17 04:41:52,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=12076, Unknown=0, NotChecked=0, Total=12432 [2023-02-17 04:41:52,382 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 112 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:55,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:41:55,275 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2023-02-17 04:41:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-17 04:41:55,275 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 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 89 [2023-02-17 04:41:55,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:41:55,275 INFO L225 Difference]: With dead ends: 97 [2023-02-17 04:41:55,275 INFO L226 Difference]: Without dead ends: 95 [2023-02-17 04:41:55,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 90 SyntacticMatches, 22 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3151 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=604, Invalid=18578, Unknown=0, NotChecked=0, Total=19182 [2023-02-17 04:41:55,276 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 4800 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 4824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 4800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-17 04:41:55,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 1517 Invalid, 4824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 4800 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-17 04:41:55,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-17 04:41:55,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2023-02-17 04:41:55,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:55,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2023-02-17 04:41:55,297 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 89 [2023-02-17 04:41:55,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:41:55,297 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2023-02-17 04:41:55,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2023-02-17 04:41:55,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-17 04:41:55,298 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:41:55,298 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:41:55,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-02-17 04:41:55,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-17 04:41:55,508 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:41:55,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:41:55,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1069925426, now seen corresponding path program 37 times [2023-02-17 04:41:55,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:41:55,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450029505] [2023-02-17 04:41:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:41:55,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:41:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 611 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:56,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:41:56,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450029505] [2023-02-17 04:41:56,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450029505] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:41:56,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391475952] [2023-02-17 04:41:56,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 04:41:56,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:56,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:41:56,459 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:41:56,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-02-17 04:41:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:56,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-17 04:41:56,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:41:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:57,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:41:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:57,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391475952] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:41:57,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:41:57,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 71 [2023-02-17 04:41:57,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211862941] [2023-02-17 04:41:57,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:41:57,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-02-17 04:41:57,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:41:57,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-02-17 04:41:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3815, Unknown=0, NotChecked=0, Total=4970 [2023-02-17 04:41:57,694 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 71 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:57,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:41:57,987 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2023-02-17 04:41:57,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-17 04:41:57,987 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 71 states have internal predecessors, (163), 0 states have call successors, (0), 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 92 [2023-02-17 04:41:57,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:41:57,988 INFO L225 Difference]: With dead ends: 170 [2023-02-17 04:41:57,988 INFO L226 Difference]: Without dead ends: 100 [2023-02-17 04:41:57,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 95 SyntacticMatches, 65 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4293 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1980, Invalid=6576, Unknown=0, NotChecked=0, Total=8556 [2023-02-17 04:41:57,993 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 283 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:41:57,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 206 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:41:57,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-17 04:41:58,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2023-02-17 04:41:58,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:58,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2023-02-17 04:41:58,013 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2023-02-17 04:41:58,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:41:58,014 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2023-02-17 04:41:58,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 71 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:41:58,014 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2023-02-17 04:41:58,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-02-17 04:41:58,014 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:41:58,014 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:41:58,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-02-17 04:41:58,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-17 04:41:58,219 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:41:58,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:41:58,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1914636392, now seen corresponding path program 38 times [2023-02-17 04:41:58,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:41:58,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785421509] [2023-02-17 04:41:58,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:41:58,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:41:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:41:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:41:59,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:41:59,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785421509] [2023-02-17 04:41:59,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785421509] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:41:59,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309559803] [2023-02-17 04:41:59,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:41:59,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:41:59,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:41:59,700 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:41:59,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-02-17 04:41:59,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:41:59,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:41:59,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 146 conjunts are in the unsatisfiable core [2023-02-17 04:41:59,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:42:00,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:42:01,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2023-02-17 04:42:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:01,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:42:02,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-02-17 04:42:02,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-17 04:42:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:02,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309559803] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:42:02,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:42:02,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2023-02-17 04:42:02,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021585669] [2023-02-17 04:42:02,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:42:02,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-02-17 04:42:02,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:42:02,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-02-17 04:42:02,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=8650, Unknown=0, NotChecked=0, Total=8930 [2023-02-17 04:42:02,835 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 95 states, 95 states have (on average 1.9684210526315788) internal successors, (187), 95 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:04,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:42:04,781 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2023-02-17 04:42:04,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-17 04:42:04,781 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9684210526315788) internal successors, (187), 95 states have internal predecessors, (187), 0 states have call successors, (0), 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 93 [2023-02-17 04:42:04,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:42:04,782 INFO L225 Difference]: With dead ends: 101 [2023-02-17 04:42:04,782 INFO L226 Difference]: Without dead ends: 99 [2023-02-17 04:42:04,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 96 SyntacticMatches, 43 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3722 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=480, Invalid=13800, Unknown=0, NotChecked=0, Total=14280 [2023-02-17 04:42:04,783 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 4860 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 4883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-17 04:42:04,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1579 Invalid, 4883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 4860 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-17 04:42:04,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-17 04:42:04,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2023-02-17 04:42:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2023-02-17 04:42:04,807 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 93 [2023-02-17 04:42:04,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:42:04,807 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2023-02-17 04:42:04,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.9684210526315788) internal successors, (187), 95 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:04,807 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2023-02-17 04:42:04,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-17 04:42:04,808 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:42:04,808 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:42:04,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-02-17 04:42:05,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:42:05,014 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:42:05,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:42:05,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1771856661, now seen corresponding path program 39 times [2023-02-17 04:42:05,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:42:05,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016195123] [2023-02-17 04:42:05,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:42:05,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:42:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:42:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 673 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:05,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:42:05,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016195123] [2023-02-17 04:42:05,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016195123] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:42:05,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342149262] [2023-02-17 04:42:05,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 04:42:05,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:42:05,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:42:05,668 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:42:05,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-02-17 04:42:08,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-02-17 04:42:08,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:42:08,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-17 04:42:08,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:42:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:09,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:42:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:10,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342149262] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:42:10,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:42:10,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 74 [2023-02-17 04:42:10,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648277288] [2023-02-17 04:42:10,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:42:10,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-02-17 04:42:10,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:42:10,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-02-17 04:42:10,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1253, Invalid=4149, Unknown=0, NotChecked=0, Total=5402 [2023-02-17 04:42:10,175 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:10,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:42:10,569 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2023-02-17 04:42:10,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-17 04:42:10,570 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2023-02-17 04:42:10,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:42:10,575 INFO L225 Difference]: With dead ends: 177 [2023-02-17 04:42:10,575 INFO L226 Difference]: Without dead ends: 104 [2023-02-17 04:42:10,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 99 SyntacticMatches, 68 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4673 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2150, Invalid=7162, Unknown=0, NotChecked=0, Total=9312 [2023-02-17 04:42:10,577 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 343 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:42:10,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 220 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 04:42:10,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-17 04:42:10,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2023-02-17 04:42:10,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:10,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2023-02-17 04:42:10,608 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2023-02-17 04:42:10,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:42:10,609 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2023-02-17 04:42:10,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:10,609 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2023-02-17 04:42:10,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-02-17 04:42:10,609 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:42:10,609 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:42:10,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-02-17 04:42:10,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-02-17 04:42:10,810 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:42:10,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:42:10,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2001953717, now seen corresponding path program 40 times [2023-02-17 04:42:10,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:42:10,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197152812] [2023-02-17 04:42:10,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:42:10,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:42:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:42:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:12,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:42:12,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197152812] [2023-02-17 04:42:12,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197152812] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:42:12,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976059434] [2023-02-17 04:42:12,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 04:42:12,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:42:12,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:42:12,356 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:42:12,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-02-17 04:42:13,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 04:42:13,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:42:13,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 111 conjunts are in the unsatisfiable core [2023-02-17 04:42:13,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:42:14,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:42:15,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:42:15,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 27 [2023-02-17 04:42:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:15,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:42:15,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-02-17 04:42:15,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-17 04:42:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:16,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976059434] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:42:16,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:42:16,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51, 51] total 101 [2023-02-17 04:42:16,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510029118] [2023-02-17 04:42:16,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:42:16,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-02-17 04:42:16,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:42:16,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-02-17 04:42:16,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=9795, Unknown=0, NotChecked=0, Total=10100 [2023-02-17 04:42:16,144 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 101 states, 101 states have (on average 1.9306930693069306) internal successors, (195), 101 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:17,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:42:17,897 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2023-02-17 04:42:17,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-02-17 04:42:17,897 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.9306930693069306) internal successors, (195), 101 states have internal predecessors, (195), 0 states have call successors, (0), 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 97 [2023-02-17 04:42:17,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:42:17,898 INFO L225 Difference]: With dead ends: 105 [2023-02-17 04:42:17,898 INFO L226 Difference]: Without dead ends: 103 [2023-02-17 04:42:17,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 98 SyntacticMatches, 45 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4348 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=536, Invalid=15976, Unknown=0, NotChecked=0, Total=16512 [2023-02-17 04:42:17,901 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 52 mSDsluCounter, 1574 mSDsCounter, 0 mSdLazyCounter, 5038 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1602 SdHoareTripleChecker+Invalid, 5065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 5038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:42:17,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1602 Invalid, 5065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 5038 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-17 04:42:17,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-17 04:42:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2023-02-17 04:42:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 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) [2023-02-17 04:42:17,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2023-02-17 04:42:17,925 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 97 [2023-02-17 04:42:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:42:17,926 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2023-02-17 04:42:17,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.9306930693069306) internal successors, (195), 101 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:17,927 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2023-02-17 04:42:17,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-17 04:42:17,935 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:42:17,935 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:42:17,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-02-17 04:42:18,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:42:18,143 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:42:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:42:18,144 INFO L85 PathProgramCache]: Analyzing trace with hash -282517422, now seen corresponding path program 41 times [2023-02-17 04:42:18,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:42:18,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036179070] [2023-02-17 04:42:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:42:18,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:42:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:42:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 738 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:18,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:42:18,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036179070] [2023-02-17 04:42:18,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036179070] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:42:18,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360050102] [2023-02-17 04:42:18,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 04:42:18,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:42:18,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:42:18,844 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:42:18,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-02-17 04:42:19,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-02-17 04:42:19,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:42:19,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-17 04:42:19,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:42:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:20,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:42:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:21,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360050102] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:42:21,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:42:21,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 77 [2023-02-17 04:42:21,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730672042] [2023-02-17 04:42:21,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:42:21,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-02-17 04:42:21,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:42:21,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-02-17 04:42:21,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=4497, Unknown=0, NotChecked=0, Total=5852 [2023-02-17 04:42:21,035 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 77 states, 77 states have (on average 2.2987012987012987) internal successors, (177), 77 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:21,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:42:21,325 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2023-02-17 04:42:21,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-17 04:42:21,325 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.2987012987012987) internal successors, (177), 77 states have internal predecessors, (177), 0 states have call successors, (0), 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 100 [2023-02-17 04:42:21,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:42:21,326 INFO L225 Difference]: With dead ends: 184 [2023-02-17 04:42:21,326 INFO L226 Difference]: Without dead ends: 108 [2023-02-17 04:42:21,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 103 SyntacticMatches, 71 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5069 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2327, Invalid=7773, Unknown=0, NotChecked=0, Total=10100 [2023-02-17 04:42:21,329 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 277 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:42:21,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 233 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:42:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-17 04:42:21,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2023-02-17 04:42:21,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:21,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2023-02-17 04:42:21,372 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 100 [2023-02-17 04:42:21,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:42:21,372 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2023-02-17 04:42:21,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.2987012987012987) internal successors, (177), 77 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:21,372 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2023-02-17 04:42:21,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-17 04:42:21,373 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:42:21,373 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:42:21,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-02-17 04:42:21,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:42:21,580 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:42:21,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:42:21,581 INFO L85 PathProgramCache]: Analyzing trace with hash 745393800, now seen corresponding path program 42 times [2023-02-17 04:42:21,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:42:21,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538093254] [2023-02-17 04:42:21,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:42:21,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:42:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:42:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:23,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:42:23,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538093254] [2023-02-17 04:42:23,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538093254] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:42:23,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629016423] [2023-02-17 04:42:23,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 04:42:23,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:42:23,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:42:23,176 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:42:23,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-02-17 04:42:27,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2023-02-17 04:42:27,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:42:27,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 113 conjunts are in the unsatisfiable core [2023-02-17 04:42:27,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:42:27,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:42:28,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:42:28,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2023-02-17 04:42:28,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:28,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:42:29,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-02-17 04:42:29,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-17 04:42:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:29,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629016423] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:42:29,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:42:29,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 53, 53] total 79 [2023-02-17 04:42:29,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281008497] [2023-02-17 04:42:29,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:42:29,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-02-17 04:42:29,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:42:29,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-02-17 04:42:29,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=5952, Unknown=0, NotChecked=0, Total=6162 [2023-02-17 04:42:29,539 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 79 states, 79 states have (on average 2.2278481012658227) internal successors, (176), 79 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:31,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:42:31,342 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2023-02-17 04:42:31,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-02-17 04:42:31,342 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.2278481012658227) internal successors, (176), 79 states have internal predecessors, (176), 0 states have call successors, (0), 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 101 [2023-02-17 04:42:31,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:42:31,343 INFO L225 Difference]: With dead ends: 109 [2023-02-17 04:42:31,343 INFO L226 Difference]: Without dead ends: 107 [2023-02-17 04:42:31,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 104 SyntacticMatches, 71 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=411, Invalid=10931, Unknown=0, NotChecked=0, Total=11342 [2023-02-17 04:42:31,346 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 42 mSDsluCounter, 1602 mSDsCounter, 0 mSdLazyCounter, 5103 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 5130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 5103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-17 04:42:31,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1631 Invalid, 5130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 5103 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-17 04:42:31,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-17 04:42:31,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2023-02-17 04:42:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:31,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2023-02-17 04:42:31,370 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 101 [2023-02-17 04:42:31,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:42:31,370 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2023-02-17 04:42:31,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.2278481012658227) internal successors, (176), 79 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:31,370 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2023-02-17 04:42:31,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-02-17 04:42:31,371 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:42:31,371 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:42:31,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-02-17 04:42:31,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-02-17 04:42:31,579 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:42:31,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:42:31,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1050568949, now seen corresponding path program 43 times [2023-02-17 04:42:31,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:42:31,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12081678] [2023-02-17 04:42:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:42:31,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:42:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:42:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 806 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:32,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:42:32,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12081678] [2023-02-17 04:42:32,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12081678] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:42:32,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257543513] [2023-02-17 04:42:32,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 04:42:32,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:42:32,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:42:32,345 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:42:32,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-02-17 04:42:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:42:32,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-17 04:42:32,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:42:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:33,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:42:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:33,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257543513] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:42:33,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:42:33,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 80 [2023-02-17 04:42:33,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147849222] [2023-02-17 04:42:33,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:42:33,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-02-17 04:42:33,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:42:33,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-02-17 04:42:33,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1461, Invalid=4859, Unknown=0, NotChecked=0, Total=6320 [2023-02-17 04:42:33,851 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:34,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:42:34,209 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2023-02-17 04:42:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-17 04:42:34,210 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2023-02-17 04:42:34,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:42:34,210 INFO L225 Difference]: With dead ends: 191 [2023-02-17 04:42:34,210 INFO L226 Difference]: Without dead ends: 112 [2023-02-17 04:42:34,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 107 SyntacticMatches, 74 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5481 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2511, Invalid=8409, Unknown=0, NotChecked=0, Total=10920 [2023-02-17 04:42:34,233 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 251 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:42:34,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 280 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 04:42:34,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-17 04:42:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2023-02-17 04:42:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:34,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2023-02-17 04:42:34,264 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2023-02-17 04:42:34,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:42:34,264 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2023-02-17 04:42:34,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:34,265 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2023-02-17 04:42:34,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-02-17 04:42:34,265 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:42:34,265 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:42:34,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-02-17 04:42:34,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-02-17 04:42:34,471 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:42:34,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:42:34,471 INFO L85 PathProgramCache]: Analyzing trace with hash -791344085, now seen corresponding path program 44 times [2023-02-17 04:42:34,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:42:34,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765055934] [2023-02-17 04:42:34,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:42:34,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:42:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:42:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:36,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:42:36,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765055934] [2023-02-17 04:42:36,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765055934] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:42:36,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655642212] [2023-02-17 04:42:36,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:42:36,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:42:36,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:42:36,162 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:42:36,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-02-17 04:42:36,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:42:36,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:42:36,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 114 conjunts are in the unsatisfiable core [2023-02-17 04:42:36,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:42:36,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:42:38,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:42:38,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 34 [2023-02-17 04:42:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:38,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:42:39,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 112 [2023-02-17 04:42:39,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 224 [2023-02-17 04:42:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:41,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655642212] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:42:41,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:42:41,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 130 [2023-02-17 04:42:41,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319475782] [2023-02-17 04:42:41,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:42:41,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2023-02-17 04:42:41,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:42:41,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2023-02-17 04:42:41,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=16363, Unknown=0, NotChecked=0, Total=16770 [2023-02-17 04:42:41,673 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 130 states, 130 states have (on average 2.1384615384615384) internal successors, (278), 130 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:45,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:42:45,686 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2023-02-17 04:42:45,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-02-17 04:42:45,687 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.1384615384615384) internal successors, (278), 130 states have internal predecessors, (278), 0 states have call successors, (0), 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 105 [2023-02-17 04:42:45,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:42:45,687 INFO L225 Difference]: With dead ends: 113 [2023-02-17 04:42:45,687 INFO L226 Difference]: Without dead ends: 111 [2023-02-17 04:42:45,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 108 SyntacticMatches, 26 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4001 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=655, Invalid=24151, Unknown=0, NotChecked=0, Total=24806 [2023-02-17 04:42:45,689 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 2207 mSDsCounter, 0 mSdLazyCounter, 6826 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 2238 SdHoareTripleChecker+Invalid, 6853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 6826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-02-17 04:42:45,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 2238 Invalid, 6853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 6826 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-02-17 04:42:45,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-17 04:42:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2023-02-17 04:42:45,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2023-02-17 04:42:45,731 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 105 [2023-02-17 04:42:45,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:42:45,731 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2023-02-17 04:42:45,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.1384615384615384) internal successors, (278), 130 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:42:45,732 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2023-02-17 04:42:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-17 04:42:45,732 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:42:45,732 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:42:45,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-02-17 04:42:45,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-02-17 04:42:45,939 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:42:45,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:42:45,939 INFO L85 PathProgramCache]: Analyzing trace with hash 148644978, now seen corresponding path program 45 times [2023-02-17 04:42:45,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:42:45,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902022294] [2023-02-17 04:42:45,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:42:45,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:42:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:42:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 877 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:42:46,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:42:46,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902022294] [2023-02-17 04:42:46,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902022294] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:42:46,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841616096] [2023-02-17 04:42:46,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 04:42:46,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:42:46,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:42:46,747 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:42:46,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-02-17 04:43:01,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2023-02-17 04:43:01,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:43:01,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-17 04:43:01,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:43:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:43:02,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:43:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:43:03,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841616096] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:43:03,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:43:03,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 83 [2023-02-17 04:43:03,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193658775] [2023-02-17 04:43:03,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:43:03,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-02-17 04:43:03,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:43:03,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-02-17 04:43:03,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1571, Invalid=5235, Unknown=0, NotChecked=0, Total=6806 [2023-02-17 04:43:03,252 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:43:03,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:43:03,631 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2023-02-17 04:43:03,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-17 04:43:03,631 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 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 108 [2023-02-17 04:43:03,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:43:03,632 INFO L225 Difference]: With dead ends: 198 [2023-02-17 04:43:03,633 INFO L226 Difference]: Without dead ends: 116 [2023-02-17 04:43:03,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 111 SyntacticMatches, 77 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5909 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2702, Invalid=9070, Unknown=0, NotChecked=0, Total=11772 [2023-02-17 04:43:03,635 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 245 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:43:03,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 259 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 04:43:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-17 04:43:03,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2023-02-17 04:43:03,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:43:03,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2023-02-17 04:43:03,668 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2023-02-17 04:43:03,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:43:03,668 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2023-02-17 04:43:03,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:43:03,668 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2023-02-17 04:43:03,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-02-17 04:43:03,669 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:43:03,669 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:43:03,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-02-17 04:43:03,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:43:03,881 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:43:03,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:43:03,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1946010456, now seen corresponding path program 46 times [2023-02-17 04:43:03,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:43:03,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993718744] [2023-02-17 04:43:03,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:43:03,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:43:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:43:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:43:05,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:43:05,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993718744] [2023-02-17 04:43:05,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993718744] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:43:05,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133319086] [2023-02-17 04:43:05,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 04:43:05,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:43:05,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:43:05,530 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:43:05,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-02-17 04:43:07,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 04:43:07,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:43:07,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 121 conjunts are in the unsatisfiable core [2023-02-17 04:43:07,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:43:07,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:43:08,898 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:43:08,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2023-02-17 04:43:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:43:08,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:43:09,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-02-17 04:43:09,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-17 04:43:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:43:09,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133319086] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:43:09,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:43:09,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 57, 57] total 85 [2023-02-17 04:43:09,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608075733] [2023-02-17 04:43:09,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:43:09,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-02-17 04:43:09,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:43:09,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-02-17 04:43:09,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=6914, Unknown=0, NotChecked=0, Total=7140 [2023-02-17 04:43:09,950 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 85 states, 85 states have (on average 2.235294117647059) internal successors, (190), 85 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:43:12,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:43:12,733 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2023-02-17 04:43:12,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-02-17 04:43:12,733 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.235294117647059) internal successors, (190), 85 states have internal predecessors, (190), 0 states have call successors, (0), 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 109 [2023-02-17 04:43:12,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:43:12,734 INFO L225 Difference]: With dead ends: 117 [2023-02-17 04:43:12,734 INFO L226 Difference]: Without dead ends: 115 [2023-02-17 04:43:12,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 112 SyntacticMatches, 77 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2439 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=459, Invalid=13113, Unknown=0, NotChecked=0, Total=13572 [2023-02-17 04:43:12,735 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 42 mSDsluCounter, 1741 mSDsCounter, 0 mSdLazyCounter, 5833 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1772 SdHoareTripleChecker+Invalid, 5862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 5833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-17 04:43:12,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1772 Invalid, 5862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 5833 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-17 04:43:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-17 04:43:12,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2023-02-17 04:43:12,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:43:12,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2023-02-17 04:43:12,760 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 109 [2023-02-17 04:43:12,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:43:12,760 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2023-02-17 04:43:12,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.235294117647059) internal successors, (190), 85 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:43:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2023-02-17 04:43:12,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-17 04:43:12,761 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:43:12,761 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:43:12,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-02-17 04:43:12,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-02-17 04:43:12,976 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:43:12,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:43:12,977 INFO L85 PathProgramCache]: Analyzing trace with hash -124139819, now seen corresponding path program 47 times [2023-02-17 04:43:12,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:43:12,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420388266] [2023-02-17 04:43:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:43:12,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:43:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:43:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 951 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:43:14,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:43:14,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420388266] [2023-02-17 04:43:14,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420388266] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:43:14,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383449330] [2023-02-17 04:43:14,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 04:43:14,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:43:14,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:43:14,013 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:43:14,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-02-17 04:43:17,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2023-02-17 04:43:17,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:43:17,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-17 04:43:17,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:43:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:43:18,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:43:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:43:19,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383449330] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:43:19,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:43:19,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 86 [2023-02-17 04:43:19,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430887135] [2023-02-17 04:43:19,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:43:19,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-02-17 04:43:19,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:43:19,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-02-17 04:43:19,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1685, Invalid=5625, Unknown=0, NotChecked=0, Total=7310 [2023-02-17 04:43:19,483 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 86 states, 86 states have (on average 2.302325581395349) internal successors, (198), 86 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:43:19,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:43:19,974 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2023-02-17 04:43:19,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-17 04:43:19,975 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.302325581395349) internal successors, (198), 86 states have internal predecessors, (198), 0 states have call successors, (0), 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 112 [2023-02-17 04:43:19,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:43:19,976 INFO L225 Difference]: With dead ends: 205 [2023-02-17 04:43:19,976 INFO L226 Difference]: Without dead ends: 120 [2023-02-17 04:43:19,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 115 SyntacticMatches, 80 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6353 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2900, Invalid=9756, Unknown=0, NotChecked=0, Total=12656 [2023-02-17 04:43:19,978 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 397 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:43:19,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 268 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 04:43:19,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-17 04:43:20,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2023-02-17 04:43:20,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:43:20,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2023-02-17 04:43:20,018 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2023-02-17 04:43:20,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:43:20,019 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2023-02-17 04:43:20,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.302325581395349) internal successors, (198), 86 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:43:20,019 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2023-02-17 04:43:20,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-02-17 04:43:20,020 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:43:20,020 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:43:20,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-02-17 04:43:20,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-17 04:43:20,225 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:43:20,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:43:20,225 INFO L85 PathProgramCache]: Analyzing trace with hash -840117237, now seen corresponding path program 48 times [2023-02-17 04:43:20,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:43:20,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692636667] [2023-02-17 04:43:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:43:20,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:43:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:43:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:43:21,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:43:21,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692636667] [2023-02-17 04:43:21,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692636667] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:43:21,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121058527] [2023-02-17 04:43:21,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 04:43:21,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:43:21,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:43:21,945 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:43:21,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-02-17 04:43:24,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2023-02-17 04:43:24,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:43:24,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 127 conjunts are in the unsatisfiable core [2023-02-17 04:43:24,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:43:24,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:43:26,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:43:26,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 26 [2023-02-17 04:43:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:43:26,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:43:27,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 93 [2023-02-17 04:43:27,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:43:27,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 184 [2023-02-17 04:43:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:43:27,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121058527] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:43:27,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:43:27,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 60, 60] total 97 [2023-02-17 04:43:27,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577279126] [2023-02-17 04:43:27,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:43:27,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-02-17 04:43:27,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:43:27,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-02-17 04:43:27,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=9009, Unknown=0, NotChecked=0, Total=9312 [2023-02-17 04:43:27,994 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 97 states, 97 states have (on average 2.2371134020618557) internal successors, (217), 97 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:43:30,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:43:30,512 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2023-02-17 04:43:30,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-02-17 04:43:30,512 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.2371134020618557) internal successors, (217), 97 states have internal predecessors, (217), 0 states have call successors, (0), 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 113 [2023-02-17 04:43:30,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:43:30,513 INFO L225 Difference]: With dead ends: 121 [2023-02-17 04:43:30,513 INFO L226 Difference]: Without dead ends: 119 [2023-02-17 04:43:30,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 114 SyntacticMatches, 73 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=587, Invalid=16183, Unknown=0, NotChecked=0, Total=16770 [2023-02-17 04:43:30,515 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 44 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 5871 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1873 SdHoareTripleChecker+Invalid, 5900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 5871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-17 04:43:30,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1873 Invalid, 5900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 5871 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-17 04:43:30,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-17 04:43:30,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2023-02-17 04:43:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:43:30,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2023-02-17 04:43:30,545 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 113 [2023-02-17 04:43:30,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:43:30,545 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2023-02-17 04:43:30,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.2371134020618557) internal successors, (217), 97 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:43:30,545 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2023-02-17 04:43:30,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-02-17 04:43:30,546 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:43:30,546 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:43:30,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-02-17 04:43:30,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:43:30,754 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:43:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:43:30,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1153380206, now seen corresponding path program 49 times [2023-02-17 04:43:30,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:43:30,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837630906] [2023-02-17 04:43:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:43:30,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:43:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:43:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1028 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:43:31,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:43:31,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837630906] [2023-02-17 04:43:31,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837630906] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:43:31,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073727306] [2023-02-17 04:43:31,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 04:43:31,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:43:31,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:43:31,921 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:43:31,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-02-17 04:43:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:43:32,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-17 04:43:32,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:43:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:43:33,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:43:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:43:34,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073727306] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:43:34,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:43:34,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 89 [2023-02-17 04:43:34,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103924412] [2023-02-17 04:43:34,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:43:34,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-02-17 04:43:34,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:43:34,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-02-17 04:43:34,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1803, Invalid=6029, Unknown=0, NotChecked=0, Total=7832 [2023-02-17 04:43:34,154 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 89 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:43:34,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:43:34,681 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2023-02-17 04:43:34,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-02-17 04:43:34,681 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 0 states have call successors, (0), 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 116 [2023-02-17 04:43:34,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:43:34,682 INFO L225 Difference]: With dead ends: 212 [2023-02-17 04:43:34,682 INFO L226 Difference]: Without dead ends: 124 [2023-02-17 04:43:34,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 119 SyntacticMatches, 83 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6813 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3105, Invalid=10467, Unknown=0, NotChecked=0, Total=13572 [2023-02-17 04:43:34,685 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 317 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:43:34,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 270 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 04:43:34,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-17 04:43:34,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2023-02-17 04:43:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:43:34,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2023-02-17 04:43:34,713 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 116 [2023-02-17 04:43:34,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:43:34,713 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2023-02-17 04:43:34,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:43:34,714 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2023-02-17 04:43:34,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-02-17 04:43:34,714 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:43:34,714 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:43:34,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-02-17 04:43:34,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-02-17 04:43:34,920 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:43:34,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:43:34,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1765692104, now seen corresponding path program 50 times [2023-02-17 04:43:34,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:43:34,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507034038] [2023-02-17 04:43:34,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:43:34,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:43:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:43:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:43:36,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:43:36,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507034038] [2023-02-17 04:43:36,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507034038] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:43:36,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183584467] [2023-02-17 04:43:36,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:43:36,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:43:36,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:43:36,849 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:43:36,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-02-17 04:43:37,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:43:37,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:43:37,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 182 conjunts are in the unsatisfiable core [2023-02-17 04:43:37,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:43:38,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-02-17 04:43:40,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:43:40,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 25 [2023-02-17 04:43:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:43:40,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:43:41,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-02-17 04:43:41,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-17 04:43:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:43:41,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183584467] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:43:41,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:43:41,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 119 [2023-02-17 04:43:41,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927083192] [2023-02-17 04:43:41,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:43:41,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2023-02-17 04:43:41,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:43:41,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2023-02-17 04:43:41,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=13690, Unknown=0, NotChecked=0, Total=14042 [2023-02-17 04:43:41,826 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 119 states, 119 states have (on average 1.9747899159663866) internal successors, (235), 119 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:43:45,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:43:45,172 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2023-02-17 04:43:45,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-02-17 04:43:45,173 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.9747899159663866) internal successors, (235), 119 states have internal predecessors, (235), 0 states have call successors, (0), 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 117 [2023-02-17 04:43:45,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:43:45,173 INFO L225 Difference]: With dead ends: 125 [2023-02-17 04:43:45,173 INFO L226 Difference]: Without dead ends: 123 [2023-02-17 04:43:45,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 120 SyntacticMatches, 55 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5912 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=600, Invalid=21750, Unknown=0, NotChecked=0, Total=22350 [2023-02-17 04:43:45,174 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 50 mSDsluCounter, 2511 mSDsCounter, 0 mSdLazyCounter, 7458 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2545 SdHoareTripleChecker+Invalid, 7488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 7458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-02-17 04:43:45,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2545 Invalid, 7488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 7458 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-02-17 04:43:45,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-17 04:43:45,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2023-02-17 04:43:45,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:43:45,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2023-02-17 04:43:45,203 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 117 [2023-02-17 04:43:45,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:43:45,203 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2023-02-17 04:43:45,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.9747899159663866) internal successors, (235), 119 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:43:45,204 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2023-02-17 04:43:45,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-17 04:43:45,204 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:43:45,204 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:43:45,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-02-17 04:43:45,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:43:45,412 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:43:45,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:43:45,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1273789621, now seen corresponding path program 51 times [2023-02-17 04:43:45,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:43:45,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114779660] [2023-02-17 04:43:45,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:43:45,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:43:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:43:46,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1108 proven. 488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:43:46,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:43:46,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114779660] [2023-02-17 04:43:46,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114779660] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:43:46,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773326380] [2023-02-17 04:43:46,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 04:43:46,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:43:46,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:43:46,654 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:43:46,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-02-17 04:44:07,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2023-02-17 04:44:07,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:44:07,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-17 04:44:07,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:44:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:44:08,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:44:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:44:09,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773326380] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:44:09,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:44:09,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 92 [2023-02-17 04:44:09,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495625335] [2023-02-17 04:44:09,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:44:09,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-02-17 04:44:09,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:44:09,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-02-17 04:44:09,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1925, Invalid=6447, Unknown=0, NotChecked=0, Total=8372 [2023-02-17 04:44:09,224 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:44:09,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:44:09,794 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2023-02-17 04:44:09,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-17 04:44:09,795 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 0 states have call successors, (0), 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 120 [2023-02-17 04:44:09,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:44:09,795 INFO L225 Difference]: With dead ends: 219 [2023-02-17 04:44:09,795 INFO L226 Difference]: Without dead ends: 128 [2023-02-17 04:44:09,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 123 SyntacticMatches, 86 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7289 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3317, Invalid=11203, Unknown=0, NotChecked=0, Total=14520 [2023-02-17 04:44:09,797 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 347 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 04:44:09,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 285 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 04:44:09,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-17 04:44:09,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2023-02-17 04:44:09,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:44:09,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2023-02-17 04:44:09,827 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 120 [2023-02-17 04:44:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:44:09,827 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2023-02-17 04:44:09,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:44:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2023-02-17 04:44:09,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-17 04:44:09,828 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:44:09,828 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:44:09,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-02-17 04:44:10,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-02-17 04:44:10,041 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:44:10,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:44:10,041 INFO L85 PathProgramCache]: Analyzing trace with hash -565054485, now seen corresponding path program 52 times [2023-02-17 04:44:10,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:44:10,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209118726] [2023-02-17 04:44:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:44:10,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:44:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:44:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:44:12,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:44:12,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209118726] [2023-02-17 04:44:12,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209118726] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:44:12,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085260741] [2023-02-17 04:44:12,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 04:44:12,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:44:12,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:44:12,644 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:44:12,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-02-17 04:44:15,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 04:44:15,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:44:15,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 133 conjunts are in the unsatisfiable core [2023-02-17 04:44:15,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:44:16,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-02-17 04:44:18,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:44:18,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 31 [2023-02-17 04:44:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:44:18,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:44:21,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-02-17 04:44:21,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 48 [2023-02-17 04:44:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:44:22,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085260741] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:44:22,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:44:22,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 63, 63] total 153 [2023-02-17 04:44:22,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671293986] [2023-02-17 04:44:22,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:44:22,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2023-02-17 04:44:22,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:44:22,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2023-02-17 04:44:22,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=22825, Unknown=0, NotChecked=0, Total=23256 [2023-02-17 04:44:22,404 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 153 states, 153 states have (on average 2.1241830065359477) internal successors, (325), 153 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:44:30,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:44:30,064 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2023-02-17 04:44:30,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-02-17 04:44:30,065 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 2.1241830065359477) internal successors, (325), 153 states have internal predecessors, (325), 0 states have call successors, (0), 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 121 [2023-02-17 04:44:30,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:44:30,066 INFO L225 Difference]: With dead ends: 129 [2023-02-17 04:44:30,066 INFO L226 Difference]: Without dead ends: 127 [2023-02-17 04:44:30,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 121 SyntacticMatches, 30 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7734 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=970, Invalid=45040, Unknown=0, NotChecked=0, Total=46010 [2023-02-17 04:44:30,069 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 138 mSDsluCounter, 3045 mSDsCounter, 0 mSdLazyCounter, 9596 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 3079 SdHoareTripleChecker+Invalid, 9629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 9596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-02-17 04:44:30,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 3079 Invalid, 9629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 9596 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-02-17 04:44:30,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-17 04:44:30,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2023-02-17 04:44:30,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:44:30,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2023-02-17 04:44:30,115 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 121 [2023-02-17 04:44:30,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:44:30,115 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2023-02-17 04:44:30,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 2.1241830065359477) internal successors, (325), 153 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:44:30,116 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2023-02-17 04:44:30,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-02-17 04:44:30,116 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:44:30,117 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:44:30,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-02-17 04:44:30,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-02-17 04:44:30,330 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:44:30,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:44:30,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1556536142, now seen corresponding path program 53 times [2023-02-17 04:44:30,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:44:30,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353595358] [2023-02-17 04:44:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:44:30,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:44:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:44:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1191 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:44:31,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:44:31,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353595358] [2023-02-17 04:44:31,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353595358] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:44:31,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447974516] [2023-02-17 04:44:31,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 04:44:31,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:44:31,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:44:31,580 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:44:31,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-02-17 04:44:32,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2023-02-17 04:44:32,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:44:33,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-17 04:44:33,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:44:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:44:34,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:44:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:44:34,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447974516] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:44:34,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:44:34,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 95 [2023-02-17 04:44:34,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038797002] [2023-02-17 04:44:34,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:44:34,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-02-17 04:44:34,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:44:34,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-02-17 04:44:34,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2051, Invalid=6879, Unknown=0, NotChecked=0, Total=8930 [2023-02-17 04:44:34,762 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 95 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:44:35,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:44:35,169 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2023-02-17 04:44:35,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-02-17 04:44:35,170 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 0 states have call successors, (0), 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 124 [2023-02-17 04:44:35,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:44:35,170 INFO L225 Difference]: With dead ends: 226 [2023-02-17 04:44:35,170 INFO L226 Difference]: Without dead ends: 132 [2023-02-17 04:44:35,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 127 SyntacticMatches, 89 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7781 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3536, Invalid=11964, Unknown=0, NotChecked=0, Total=15500 [2023-02-17 04:44:35,172 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 377 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:44:35,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 251 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 04:44:35,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-17 04:44:35,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2023-02-17 04:44:35,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:44:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2023-02-17 04:44:35,205 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 124 [2023-02-17 04:44:35,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:44:35,206 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2023-02-17 04:44:35,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:44:35,206 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2023-02-17 04:44:35,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-02-17 04:44:35,207 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:44:35,207 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:44:35,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-02-17 04:44:35,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:44:35,420 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:44:35,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:44:35,421 INFO L85 PathProgramCache]: Analyzing trace with hash 184815848, now seen corresponding path program 54 times [2023-02-17 04:44:35,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:44:35,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813927795] [2023-02-17 04:44:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:44:35,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:44:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:44:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:44:37,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:44:37,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813927795] [2023-02-17 04:44:37,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813927795] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:44:37,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934778975] [2023-02-17 04:44:37,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 04:44:37,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:44:37,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:44:37,357 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:44:37,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process