./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/mlceu2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-tiling/mlceu2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5f6dc88ffbc484195ca6ca04cd67e8542305d5e0e0d9b35d5440f9c4d427d3ec --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 09:45:54,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 09:45:54,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 09:45:54,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 09:45:54,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 09:45:54,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 09:45:54,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 09:45:54,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 09:45:54,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 09:45:54,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 09:45:54,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 09:45:54,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 09:45:54,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 09:45:54,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 09:45:54,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 09:45:54,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 09:45:54,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 09:45:54,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 09:45:54,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 09:45:54,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 09:45:54,709 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 09:45:54,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 09:45:54,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 09:45:54,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 09:45:54,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 09:45:54,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 09:45:54,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 09:45:54,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 09:45:54,720 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 09:45:54,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 09:45:54,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 09:45:54,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 09:45:54,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 09:45:54,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 09:45:54,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 09:45:54,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 09:45:54,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 09:45:54,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 09:45:54,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 09:45:54,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 09:45:54,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 09:45:54,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 09:45:54,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 09:45:54,758 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 09:45:54,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 09:45:54,759 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 09:45:54,760 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 09:45:54,760 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 09:45:54,760 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 09:45:54,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 09:45:54,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 09:45:54,761 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 09:45:54,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 09:45:54,762 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 09:45:54,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 09:45:54,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 09:45:54,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 09:45:54,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 09:45:54,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 09:45:54,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 09:45:54,764 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 09:45:54,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 09:45:54,764 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 09:45:54,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 09:45:54,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 09:45:54,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 09:45:54,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 09:45:54,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:45:54,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 09:45:54,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 09:45:54,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 09:45:54,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 09:45:54,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 09:45:54,766 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 09:45:54,766 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 09:45:54,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 09:45:54,767 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f6dc88ffbc484195ca6ca04cd67e8542305d5e0e0d9b35d5440f9c4d427d3ec [2022-07-22 09:45:54,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 09:45:54,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 09:45:54,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 09:45:54,995 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 09:45:54,995 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 09:45:54,997 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/mlceu2.c [2022-07-22 09:45:55,053 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babe780f2/cabd8032ff8d482c91b0d8207e94c3ff/FLAG5e2f6cb35 [2022-07-22 09:45:55,426 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 09:45:55,426 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mlceu2.c [2022-07-22 09:45:55,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babe780f2/cabd8032ff8d482c91b0d8207e94c3ff/FLAG5e2f6cb35 [2022-07-22 09:45:55,828 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babe780f2/cabd8032ff8d482c91b0d8207e94c3ff [2022-07-22 09:45:55,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 09:45:55,832 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 09:45:55,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 09:45:55,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 09:45:55,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 09:45:55,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:45:55" (1/1) ... [2022-07-22 09:45:55,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d31ceaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:55, skipping insertion in model container [2022-07-22 09:45:55,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:45:55" (1/1) ... [2022-07-22 09:45:55,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 09:45:55,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 09:45:55,988 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mlceu2.c[397,410] [2022-07-22 09:45:55,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:45:56,006 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 09:45:56,016 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mlceu2.c[397,410] [2022-07-22 09:45:56,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:45:56,032 INFO L208 MainTranslator]: Completed translation [2022-07-22 09:45:56,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:56 WrapperNode [2022-07-22 09:45:56,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 09:45:56,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 09:45:56,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 09:45:56,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 09:45:56,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:56" (1/1) ... [2022-07-22 09:45:56,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:56" (1/1) ... [2022-07-22 09:45:56,061 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2022-07-22 09:45:56,062 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 09:45:56,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 09:45:56,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 09:45:56,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 09:45:56,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:56" (1/1) ... [2022-07-22 09:45:56,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:56" (1/1) ... [2022-07-22 09:45:56,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:56" (1/1) ... [2022-07-22 09:45:56,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:56" (1/1) ... [2022-07-22 09:45:56,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:56" (1/1) ... [2022-07-22 09:45:56,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:56" (1/1) ... [2022-07-22 09:45:56,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:56" (1/1) ... [2022-07-22 09:45:56,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 09:45:56,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 09:45:56,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 09:45:56,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 09:45:56,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:56" (1/1) ... [2022-07-22 09:45:56,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:45:56,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:45:56,113 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 09:45:56,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 09:45:56,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 09:45:56,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 09:45:56,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 09:45:56,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 09:45:56,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 09:45:56,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 09:45:56,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 09:45:56,195 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 09:45:56,197 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 09:45:56,286 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 09:45:56,291 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 09:45:56,291 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 09:45:56,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:45:56 BoogieIcfgContainer [2022-07-22 09:45:56,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 09:45:56,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 09:45:56,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 09:45:56,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 09:45:56,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:45:55" (1/3) ... [2022-07-22 09:45:56,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d6be9bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:45:56, skipping insertion in model container [2022-07-22 09:45:56,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:56" (2/3) ... [2022-07-22 09:45:56,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d6be9bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:45:56, skipping insertion in model container [2022-07-22 09:45:56,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:45:56" (3/3) ... [2022-07-22 09:45:56,300 INFO L111 eAbstractionObserver]: Analyzing ICFG mlceu2.c [2022-07-22 09:45:56,311 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 09:45:56,311 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 09:45:56,350 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 09:45:56,356 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7fc4f946, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@364821fa [2022-07-22 09:45:56,356 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 09:45:56,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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) [2022-07-22 09:45:56,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-22 09:45:56,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:45:56,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:45:56,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:45:56,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:45:56,369 INFO L85 PathProgramCache]: Analyzing trace with hash 131762974, now seen corresponding path program 1 times [2022-07-22 09:45:56,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:45:56,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206823783] [2022-07-22 09:45:56,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:56,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:45:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:56,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:45:56,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206823783] [2022-07-22 09:45:56,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206823783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:45:56,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:45:56,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 09:45:56,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756324716] [2022-07-22 09:45:56,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:45:56,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 09:45:56,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:45:56,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 09:45:56,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 09:45:56,543 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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) 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) [2022-07-22 09:45:56,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:45:56,558 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-07-22 09:45:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 09:45:56,560 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 [2022-07-22 09:45:56,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:45:56,567 INFO L225 Difference]: With dead ends: 28 [2022-07-22 09:45:56,567 INFO L226 Difference]: Without dead ends: 13 [2022-07-22 09:45:56,571 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 [2022-07-22 09:45:56,576 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:45:56,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:45:56,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-07-22 09:45:56,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-07-22 09:45:56,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2022-07-22 09:45:56,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-07-22 09:45:56,601 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2022-07-22 09:45:56,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:45:56,602 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-07-22 09:45:56,603 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) [2022-07-22 09:45:56,603 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-07-22 09:45:56,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-22 09:45:56,604 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:45:56,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:45:56,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 09:45:56,605 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:45:56,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:45:56,606 INFO L85 PathProgramCache]: Analyzing trace with hash 121604243, now seen corresponding path program 1 times [2022-07-22 09:45:56,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:45:56,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018728080] [2022-07-22 09:45:56,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:56,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:45:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:56,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:45:56,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018728080] [2022-07-22 09:45:56,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018728080] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:45:56,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:45:56,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 09:45:56,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738644058] [2022-07-22 09:45:56,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:45:56,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:45:56,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:45:56,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:45:56,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:45:56,729 INFO L87 Difference]: Start difference. First operand 13 states and 15 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) [2022-07-22 09:45:56,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:45:56,767 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-07-22 09:45:56,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:45:56,768 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 [2022-07-22 09:45:56,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:45:56,768 INFO L225 Difference]: With dead ends: 26 [2022-07-22 09:45:56,768 INFO L226 Difference]: Without dead ends: 16 [2022-07-22 09:45:56,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:45:56,770 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:45:56,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 16 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:45:56,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-22 09:45:56,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-07-22 09:45:56,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-07-22 09:45:56,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2022-07-22 09:45:56,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:45:56,775 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-07-22 09:45:56,775 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) [2022-07-22 09:45:56,775 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-07-22 09:45:56,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 09:45:56,776 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:45:56,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:45:56,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 09:45:56,776 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:45:56,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:45:56,777 INFO L85 PathProgramCache]: Analyzing trace with hash -150898456, now seen corresponding path program 1 times [2022-07-22 09:45:56,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:45:56,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172901232] [2022-07-22 09:45:56,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:56,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:45:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:56,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:45:56,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172901232] [2022-07-22 09:45:56,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172901232] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:45:56,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841837137] [2022-07-22 09:45:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:56,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:45:56,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:45:56,852 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:45:56,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 09:45:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:56,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 09:45:56,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:45:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:57,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:45:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:57,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841837137] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:45:57,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:45:57,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-22 09:45:57,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676475880] [2022-07-22 09:45:57,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:45:57,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 09:45:57,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:45:57,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 09:45:57,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:45:57,086 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2022-07-22 09:45:57,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:45:57,164 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-07-22 09:45:57,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 09:45:57,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-22 09:45:57,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:45:57,166 INFO L225 Difference]: With dead ends: 29 [2022-07-22 09:45:57,166 INFO L226 Difference]: Without dead ends: 19 [2022-07-22 09:45:57,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:45:57,168 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:45:57,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 22 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:45:57,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-22 09:45:57,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-07-22 09:45:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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) [2022-07-22 09:45:57,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-07-22 09:45:57,172 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2022-07-22 09:45:57,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:45:57,172 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-07-22 09:45:57,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2022-07-22 09:45:57,173 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-07-22 09:45:57,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-22 09:45:57,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:45:57,174 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:45:57,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 09:45:57,387 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 [2022-07-22 09:45:57,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:45:57,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:45:57,388 INFO L85 PathProgramCache]: Analyzing trace with hash -790614925, now seen corresponding path program 2 times [2022-07-22 09:45:57,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:45:57,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395493909] [2022-07-22 09:45:57,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:57,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:45:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:57,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:45:57,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395493909] [2022-07-22 09:45:57,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395493909] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:45:57,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045712478] [2022-07-22 09:45:57,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:45:57,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:45:57,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:45:57,623 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:45:57,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 09:45:57,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:45:57,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:45:57,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 09:45:57,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:45:57,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:45:57,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:45:57,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 29 [2022-07-22 09:45:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:57,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:45:59,944 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_22| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_22|)) (forall ((v_ArrVal_28 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_22| 4)) v_ArrVal_28) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) is different from false [2022-07-22 09:45:59,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 19 [2022-07-22 09:45:59,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 146 treesize of output 142 [2022-07-22 09:46:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-22 09:46:00,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045712478] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:00,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:00,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2022-07-22 09:46:00,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772665380] [2022-07-22 09:46:00,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:00,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 09:46:00,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:00,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 09:46:00,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=140, Unknown=1, NotChecked=24, Total=210 [2022-07-22 09:46:00,037 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-07-22 09:46:02,067 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_22| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_22|)) (forall ((v_ArrVal_28 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_22| 4)) v_ArrVal_28) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) (= .cse0 0) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) 0))) is different from false [2022-07-22 09:46:02,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:02,243 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-07-22 09:46:02,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 09:46:02,244 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 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 14 [2022-07-22 09:46:02,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:02,245 INFO L225 Difference]: With dead ends: 26 [2022-07-22 09:46:02,245 INFO L226 Difference]: Without dead ends: 24 [2022-07-22 09:46:02,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=85, Invalid=227, Unknown=2, NotChecked=66, Total=380 [2022-07-22 09:46:02,247 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:02,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 31 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 60 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-07-22 09:46:02,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-22 09:46:02,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2022-07-22 09:46:02,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 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) [2022-07-22 09:46:02,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-07-22 09:46:02,251 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2022-07-22 09:46:02,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:02,252 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-07-22 09:46:02,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-07-22 09:46:02,252 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-07-22 09:46:02,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-22 09:46:02,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:02,253 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:02,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:02,471 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 [2022-07-22 09:46:02,472 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:02,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:02,472 INFO L85 PathProgramCache]: Analyzing trace with hash -601757591, now seen corresponding path program 1 times [2022-07-22 09:46:02,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:02,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451288655] [2022-07-22 09:46:02,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:02,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:02,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:02,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451288655] [2022-07-22 09:46:02,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451288655] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:02,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132069276] [2022-07-22 09:46:02,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:02,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:02,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:02,608 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:46:02,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 09:46:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:02,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 09:46:02,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:02,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:02,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:02,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:02,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:46:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:02,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132069276] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:02,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:02,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-07-22 09:46:02,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067277986] [2022-07-22 09:46:02,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:02,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 09:46:02,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:02,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 09:46:02,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-22 09:46:02,822 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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) [2022-07-22 09:46:02,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:02,954 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-07-22 09:46:02,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 09:46:02,955 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 18 [2022-07-22 09:46:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:02,955 INFO L225 Difference]: With dead ends: 31 [2022-07-22 09:46:02,956 INFO L226 Difference]: Without dead ends: 29 [2022-07-22 09:46:02,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-07-22 09:46:02,957 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:02,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 42 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:46:02,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-22 09:46:02,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2022-07-22 09:46:02,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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) [2022-07-22 09:46:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-07-22 09:46:02,962 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2022-07-22 09:46:02,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:02,962 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-07-22 09:46:02,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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) [2022-07-22 09:46:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-07-22 09:46:02,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-22 09:46:02,963 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:02,964 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:03,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:03,179 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 [2022-07-22 09:46:03,180 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:03,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:03,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1214727841, now seen corresponding path program 2 times [2022-07-22 09:46:03,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:03,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173680417] [2022-07-22 09:46:03,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:03,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:03,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:03,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173680417] [2022-07-22 09:46:03,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173680417] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:03,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703339908] [2022-07-22 09:46:03,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:46:03,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:03,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:03,262 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) [2022-07-22 09:46:03,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 09:46:03,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:46:03,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:03,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 09:46:03,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:03,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:03,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703339908] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:03,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:03,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-22 09:46:03,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921183873] [2022-07-22 09:46:03,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:03,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 09:46:03,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:03,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 09:46:03,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-22 09:46:03,439 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:03,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:03,516 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-07-22 09:46:03,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 09:46:03,516 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-22 09:46:03,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:03,517 INFO L225 Difference]: With dead ends: 62 [2022-07-22 09:46:03,517 INFO L226 Difference]: Without dead ends: 36 [2022-07-22 09:46:03,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-07-22 09:46:03,518 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:03,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 42 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:46:03,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-22 09:46:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2022-07-22 09:46:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 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) [2022-07-22 09:46:03,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-07-22 09:46:03,532 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2022-07-22 09:46:03,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:03,532 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-07-22 09:46:03,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:03,533 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-07-22 09:46:03,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 09:46:03,533 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:03,533 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:03,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:03,734 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 [2022-07-22 09:46:03,734 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:03,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:03,734 INFO L85 PathProgramCache]: Analyzing trace with hash 185659636, now seen corresponding path program 3 times [2022-07-22 09:46:03,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:03,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615143317] [2022-07-22 09:46:03,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:03,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:03,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:03,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615143317] [2022-07-22 09:46:03,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615143317] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:03,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349024937] [2022-07-22 09:46:03,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:46:03,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:03,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:03,847 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) [2022-07-22 09:46:03,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 09:46:03,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 09:46:03,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:03,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 09:46:03,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:03,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:04,173 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:46:04,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 [2022-07-22 09:46:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:04,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:04,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:04,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 28 [2022-07-22 09:46:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:04,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349024937] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:04,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:04,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2022-07-22 09:46:04,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319405269] [2022-07-22 09:46:04,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:04,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 09:46:04,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:04,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 09:46:04,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-07-22 09:46:04,496 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:04,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:04,788 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-07-22 09:46:04,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 09:46:04,789 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 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 [2022-07-22 09:46:04,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:04,789 INFO L225 Difference]: With dead ends: 46 [2022-07-22 09:46:04,789 INFO L226 Difference]: Without dead ends: 30 [2022-07-22 09:46:04,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 09:46:04,791 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:04,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 138 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 111 Invalid, 0 Unknown, 125 Unchecked, 0.1s Time] [2022-07-22 09:46:04,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-22 09:46:04,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-07-22 09:46:04,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-07-22 09:46:04,797 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2022-07-22 09:46:04,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:04,797 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-07-22 09:46:04,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-07-22 09:46:04,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 09:46:04,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:04,798 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:04,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:05,022 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 [2022-07-22 09:46:05,022 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:05,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:05,023 INFO L85 PathProgramCache]: Analyzing trace with hash -903462723, now seen corresponding path program 1 times [2022-07-22 09:46:05,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:05,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830019482] [2022-07-22 09:46:05,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:05,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 09:46:05,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:05,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830019482] [2022-07-22 09:46:05,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830019482] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:05,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95826193] [2022-07-22 09:46:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:05,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:05,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:05,100 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) [2022-07-22 09:46:05,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 09:46:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:05,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 09:46:05,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 09:46:05,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 09:46:05,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95826193] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:05,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:05,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-22 09:46:05,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816103631] [2022-07-22 09:46:05,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:05,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 09:46:05,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:05,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 09:46:05,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-07-22 09:46:05,226 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2022-07-22 09:46:05,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:05,315 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2022-07-22 09:46:05,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 09:46:05,316 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-22 09:46:05,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:05,322 INFO L225 Difference]: With dead ends: 101 [2022-07-22 09:46:05,322 INFO L226 Difference]: Without dead ends: 85 [2022-07-22 09:46:05,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-07-22 09:46:05,323 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 133 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:05,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 44 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:46:05,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-22 09:46:05,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 42. [2022-07-22 09:46:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:05,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-07-22 09:46:05,344 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 28 [2022-07-22 09:46:05,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:05,344 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-07-22 09:46:05,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2022-07-22 09:46:05,345 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-07-22 09:46:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 09:46:05,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:05,345 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:05,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:05,567 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 [2022-07-22 09:46:05,568 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:05,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:05,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2111640895, now seen corresponding path program 4 times [2022-07-22 09:46:05,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:05,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190280287] [2022-07-22 09:46:05,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:05,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:05,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:05,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190280287] [2022-07-22 09:46:05,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190280287] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:05,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794994292] [2022-07-22 09:46:05,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:46:05,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:05,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:05,704 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) [2022-07-22 09:46:05,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 09:46:05,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:46:05,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:05,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 09:46:05,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:05,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:05,818 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:46:05,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 [2022-07-22 09:46:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:05,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:05,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:05,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:46:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:06,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794994292] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:06,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:06,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 17 [2022-07-22 09:46:06,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111666556] [2022-07-22 09:46:06,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:06,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 09:46:06,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:06,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 09:46:06,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-22 09:46:06,007 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 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) [2022-07-22 09:46:06,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:06,243 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2022-07-22 09:46:06,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 09:46:06,243 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-22 09:46:06,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:06,244 INFO L225 Difference]: With dead ends: 78 [2022-07-22 09:46:06,244 INFO L226 Difference]: Without dead ends: 76 [2022-07-22 09:46:06,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-07-22 09:46:06,245 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:06,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 114 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 198 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-07-22 09:46:06,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-22 09:46:06,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 47. [2022-07-22 09:46:06,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:06,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-07-22 09:46:06,252 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 28 [2022-07-22 09:46:06,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:06,253 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-07-22 09:46:06,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 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) [2022-07-22 09:46:06,253 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-07-22 09:46:06,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-22 09:46:06,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:06,254 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:06,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:06,455 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 [2022-07-22 09:46:06,456 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:06,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:06,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1743746796, now seen corresponding path program 5 times [2022-07-22 09:46:06,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:06,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411767540] [2022-07-22 09:46:06,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:06,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:06,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:06,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411767540] [2022-07-22 09:46:06,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411767540] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:06,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92831843] [2022-07-22 09:46:06,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:46:06,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:06,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:06,602 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) [2022-07-22 09:46:06,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 09:46:06,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-22 09:46:06,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:06,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 09:46:06,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:06,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:06,722 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:06,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:46:06,752 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:06,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:46:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:06,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:06,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:06,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:46:06,960 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:46:06,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92831843] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:06,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:06,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 18 [2022-07-22 09:46:06,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620676740] [2022-07-22 09:46:06,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:06,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 09:46:06,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:06,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 09:46:06,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-07-22 09:46:06,962 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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) [2022-07-22 09:46:07,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:07,224 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-07-22 09:46:07,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 09:46:07,224 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-22 09:46:07,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:07,225 INFO L225 Difference]: With dead ends: 68 [2022-07-22 09:46:07,225 INFO L226 Difference]: Without dead ends: 66 [2022-07-22 09:46:07,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 49 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-07-22 09:46:07,226 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:07,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 119 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:46:07,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-22 09:46:07,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2022-07-22 09:46:07,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:07,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-07-22 09:46:07,233 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 31 [2022-07-22 09:46:07,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:07,234 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-07-22 09:46:07,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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) [2022-07-22 09:46:07,234 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-07-22 09:46:07,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-22 09:46:07,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:07,234 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:07,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-22 09:46:07,435 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 [2022-07-22 09:46:07,435 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:07,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:07,436 INFO L85 PathProgramCache]: Analyzing trace with hash 2074446645, now seen corresponding path program 6 times [2022-07-22 09:46:07,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:07,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270363754] [2022-07-22 09:46:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:07,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:07,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:07,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270363754] [2022-07-22 09:46:07,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270363754] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:07,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360230916] [2022-07-22 09:46:07,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:46:07,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:07,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:07,636 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) [2022-07-22 09:46:07,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 09:46:07,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-22 09:46:07,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:07,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 09:46:07,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:07,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:08,024 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:46:08,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 [2022-07-22 09:46:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:08,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:08,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:08,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 28 [2022-07-22 09:46:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:08,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360230916] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:08,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:08,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 31 [2022-07-22 09:46:08,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483567636] [2022-07-22 09:46:08,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:08,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-22 09:46:08,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:08,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-22 09:46:08,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2022-07-22 09:46:08,379 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 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) [2022-07-22 09:46:08,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:08,688 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2022-07-22 09:46:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 09:46:08,689 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-22 09:46:08,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:08,689 INFO L225 Difference]: With dead ends: 67 [2022-07-22 09:46:08,689 INFO L226 Difference]: Without dead ends: 47 [2022-07-22 09:46:08,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2022-07-22 09:46:08,691 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:08,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 130 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 0 Unknown, 104 Unchecked, 0.1s Time] [2022-07-22 09:46:08,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-22 09:46:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-07-22 09:46:08,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 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) [2022-07-22 09:46:08,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-07-22 09:46:08,699 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 32 [2022-07-22 09:46:08,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:08,701 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-07-22 09:46:08,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 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) [2022-07-22 09:46:08,701 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-07-22 09:46:08,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-22 09:46:08,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:08,705 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:08,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:08,923 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 [2022-07-22 09:46:08,923 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:08,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1532949366, now seen corresponding path program 7 times [2022-07-22 09:46:08,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:08,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856195604] [2022-07-22 09:46:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:08,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:09,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:09,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856195604] [2022-07-22 09:46:09,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856195604] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:09,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426707793] [2022-07-22 09:46:09,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:46:09,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:09,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:09,150 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) [2022-07-22 09:46:09,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 09:46:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:09,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 09:46:09,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:09,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:09,315 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:09,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:46:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:09,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:11,558 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_120| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_120|)) (forall ((v_ArrVal_196 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_120| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_196) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)))) is different from false [2022-07-22 09:46:11,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 21 [2022-07-22 09:46:11,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 178 treesize of output 170 [2022-07-22 09:46:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-07-22 09:46:11,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426707793] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:11,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:11,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 31 [2022-07-22 09:46:11,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662985592] [2022-07-22 09:46:11,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:11,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-22 09:46:11,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:11,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-22 09:46:11,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=755, Unknown=1, NotChecked=56, Total=930 [2022-07-22 09:46:11,700 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 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) [2022-07-22 09:46:13,856 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (= .cse0 12) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_120| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_120|)) (forall ((v_ArrVal_196 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_120| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_196) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)))))) is different from false [2022-07-22 09:46:14,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:14,128 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2022-07-22 09:46:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 09:46:14,128 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 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 35 [2022-07-22 09:46:14,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:14,129 INFO L225 Difference]: With dead ends: 78 [2022-07-22 09:46:14,129 INFO L226 Difference]: Without dead ends: 76 [2022-07-22 09:46:14,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=235, Invalid=1663, Unknown=2, NotChecked=170, Total=2070 [2022-07-22 09:46:14,130 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:14,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 186 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 333 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-07-22 09:46:14,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-22 09:46:14,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2022-07-22 09:46:14,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2022-07-22 09:46:14,137 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 35 [2022-07-22 09:46:14,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:14,138 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2022-07-22 09:46:14,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 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) [2022-07-22 09:46:14,138 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2022-07-22 09:46:14,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 09:46:14,139 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:14,139 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:14,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:14,359 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 [2022-07-22 09:46:14,359 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:14,360 INFO L85 PathProgramCache]: Analyzing trace with hash 632743168, now seen corresponding path program 8 times [2022-07-22 09:46:14,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:14,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92632384] [2022-07-22 09:46:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:14,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:14,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:14,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92632384] [2022-07-22 09:46:14,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92632384] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:14,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600186102] [2022-07-22 09:46:14,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:46:14,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:14,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:14,538 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) [2022-07-22 09:46:14,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 09:46:14,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:46:14,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:14,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-22 09:46:14,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:14,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:14,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:14,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:14,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:46:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:14,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600186102] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:14,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:14,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 20 [2022-07-22 09:46:14,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950093786] [2022-07-22 09:46:14,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:14,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 09:46:14,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:14,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 09:46:14,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-07-22 09:46:14,866 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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) [2022-07-22 09:46:15,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:15,193 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2022-07-22 09:46:15,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 09:46:15,194 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-22 09:46:15,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:15,194 INFO L225 Difference]: With dead ends: 80 [2022-07-22 09:46:15,194 INFO L226 Difference]: Without dead ends: 78 [2022-07-22 09:46:15,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 09:46:15,195 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:15,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 164 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:46:15,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-22 09:46:15,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2022-07-22 09:46:15,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 71 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:15,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2022-07-22 09:46:15,206 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 39 [2022-07-22 09:46:15,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:15,206 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2022-07-22 09:46:15,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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) [2022-07-22 09:46:15,206 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2022-07-22 09:46:15,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-22 09:46:15,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:15,213 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:15,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:15,431 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 [2022-07-22 09:46:15,431 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:15,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:15,432 INFO L85 PathProgramCache]: Analyzing trace with hash -23096714, now seen corresponding path program 9 times [2022-07-22 09:46:15,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:15,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288908814] [2022-07-22 09:46:15,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:15,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:15,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:15,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288908814] [2022-07-22 09:46:15,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288908814] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:15,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510537290] [2022-07-22 09:46:15,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:46:15,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:15,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:15,547 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) [2022-07-22 09:46:15,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 09:46:15,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-22 09:46:15,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:15,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 09:46:15,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:15,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:15,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510537290] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:15,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:15,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-22 09:46:15,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624997467] [2022-07-22 09:46:15,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:15,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 09:46:15,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:15,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 09:46:15,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-22 09:46:15,838 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 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) [2022-07-22 09:46:15,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:15,976 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2022-07-22 09:46:15,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 09:46:15,977 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-22 09:46:15,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:15,977 INFO L225 Difference]: With dead ends: 110 [2022-07-22 09:46:15,977 INFO L226 Difference]: Without dead ends: 82 [2022-07-22 09:46:15,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-07-22 09:46:15,979 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 96 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:15,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 115 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:46:15,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-22 09:46:15,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2022-07-22 09:46:15,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 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) [2022-07-22 09:46:15,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2022-07-22 09:46:15,990 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 43 [2022-07-22 09:46:15,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:15,990 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2022-07-22 09:46:15,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 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) [2022-07-22 09:46:15,991 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2022-07-22 09:46:15,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-22 09:46:15,991 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:15,991 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:16,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:16,207 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 [2022-07-22 09:46:16,207 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:16,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:16,208 INFO L85 PathProgramCache]: Analyzing trace with hash 219503105, now seen corresponding path program 10 times [2022-07-22 09:46:16,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:16,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996687999] [2022-07-22 09:46:16,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:16,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:16,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:16,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996687999] [2022-07-22 09:46:16,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996687999] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:16,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298873413] [2022-07-22 09:46:16,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:46:16,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:16,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:16,406 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) [2022-07-22 09:46:16,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 09:46:16,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:46:16,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:16,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-22 09:46:16,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:16,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:16,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:16,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:16,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:46:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:16,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298873413] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:16,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:16,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 23 [2022-07-22 09:46:16,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145946583] [2022-07-22 09:46:16,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:16,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 09:46:16,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:16,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 09:46:16,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-07-22 09:46:16,766 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:17,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:17,159 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2022-07-22 09:46:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 09:46:17,167 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-22 09:46:17,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:17,167 INFO L225 Difference]: With dead ends: 84 [2022-07-22 09:46:17,167 INFO L226 Difference]: Without dead ends: 82 [2022-07-22 09:46:17,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 09:46:17,169 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:17,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 182 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:46:17,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-22 09:46:17,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2022-07-22 09:46:17,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 75 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) [2022-07-22 09:46:17,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2022-07-22 09:46:17,180 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 46 [2022-07-22 09:46:17,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:17,180 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2022-07-22 09:46:17,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2022-07-22 09:46:17,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 09:46:17,181 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:17,181 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:17,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:17,395 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 [2022-07-22 09:46:17,395 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:17,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:17,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1437626040, now seen corresponding path program 2 times [2022-07-22 09:46:17,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:17,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915755182] [2022-07-22 09:46:17,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:17,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:46:17,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:17,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915755182] [2022-07-22 09:46:17,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915755182] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:17,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213839360] [2022-07-22 09:46:17,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:46:17,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:17,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:17,480 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) [2022-07-22 09:46:17,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 09:46:17,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:46:17,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:17,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 09:46:17,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:46:17,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:46:17,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213839360] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:17,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:17,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-07-22 09:46:17,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192236457] [2022-07-22 09:46:17,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:17,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 09:46:17,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:17,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 09:46:17,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2022-07-22 09:46:17,765 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:17,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:17,948 INFO L93 Difference]: Finished difference Result 227 states and 256 transitions. [2022-07-22 09:46:17,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 09:46:17,949 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-22 09:46:17,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:17,950 INFO L225 Difference]: With dead ends: 227 [2022-07-22 09:46:17,950 INFO L226 Difference]: Without dead ends: 195 [2022-07-22 09:46:17,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2022-07-22 09:46:17,951 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 263 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:17,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 91 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:46:17,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-07-22 09:46:17,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 106. [2022-07-22 09:46:17,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1714285714285715) internal successors, (123), 105 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) [2022-07-22 09:46:17,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2022-07-22 09:46:17,964 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 47 [2022-07-22 09:46:17,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:17,965 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2022-07-22 09:46:17,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:17,965 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2022-07-22 09:46:17,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 09:46:17,966 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:17,966 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:17,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:18,171 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 [2022-07-22 09:46:18,171 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:18,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:18,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2009702135, now seen corresponding path program 11 times [2022-07-22 09:46:18,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:18,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228632120] [2022-07-22 09:46:18,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:18,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 51 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:18,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:18,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228632120] [2022-07-22 09:46:18,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228632120] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:18,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985573722] [2022-07-22 09:46:18,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:46:18,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:18,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:18,285 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) [2022-07-22 09:46:18,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 09:46:18,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-22 09:46:18,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:18,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 09:46:18,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:18,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:18,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985573722] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:18,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:18,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-22 09:46:18,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942053487] [2022-07-22 09:46:18,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:18,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 09:46:18,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:18,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 09:46:18,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-22 09:46:18,592 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 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) [2022-07-22 09:46:18,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:18,757 INFO L93 Difference]: Finished difference Result 148 states and 164 transitions. [2022-07-22 09:46:18,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 09:46:18,758 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 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 50 [2022-07-22 09:46:18,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:18,759 INFO L225 Difference]: With dead ends: 148 [2022-07-22 09:46:18,759 INFO L226 Difference]: Without dead ends: 116 [2022-07-22 09:46:18,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 09:46:18,760 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 125 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:18,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 128 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:46:18,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-22 09:46:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 106. [2022-07-22 09:46:18,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.161904761904762) internal successors, (122), 105 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) [2022-07-22 09:46:18,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2022-07-22 09:46:18,772 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 50 [2022-07-22 09:46:18,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:18,772 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2022-07-22 09:46:18,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 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) [2022-07-22 09:46:18,773 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2022-07-22 09:46:18,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-22 09:46:18,773 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:18,773 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:18,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-22 09:46:18,997 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 [2022-07-22 09:46:18,997 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:18,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:18,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1663478516, now seen corresponding path program 12 times [2022-07-22 09:46:18,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:18,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17629188] [2022-07-22 09:46:18,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:18,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:19,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:19,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17629188] [2022-07-22 09:46:19,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17629188] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:19,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52226375] [2022-07-22 09:46:19,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:46:19,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:19,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:19,239 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) [2022-07-22 09:46:19,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 09:46:19,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-22 09:46:19,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:19,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 09:46:19,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:19,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:19,946 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:46:19,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 [2022-07-22 09:46:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 66 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:19,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:20,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:20,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 28 [2022-07-22 09:46:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 60 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:20,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52226375] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:20,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:20,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 47 [2022-07-22 09:46:20,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900143138] [2022-07-22 09:46:20,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:20,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-22 09:46:20,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:20,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-22 09:46:20,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2022-07-22 09:46:20,560 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand has 47 states, 47 states have (on average 2.8085106382978724) internal successors, (132), 47 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) [2022-07-22 09:46:21,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:21,130 INFO L93 Difference]: Finished difference Result 139 states and 155 transitions. [2022-07-22 09:46:21,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-22 09:46:21,130 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.8085106382978724) internal successors, (132), 47 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 53 [2022-07-22 09:46:21,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:21,131 INFO L225 Difference]: With dead ends: 139 [2022-07-22 09:46:21,131 INFO L226 Difference]: Without dead ends: 107 [2022-07-22 09:46:21,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=554, Invalid=4138, Unknown=0, NotChecked=0, Total=4692 [2022-07-22 09:46:21,133 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:21,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 277 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 270 Invalid, 0 Unknown, 197 Unchecked, 0.1s Time] [2022-07-22 09:46:21,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-22 09:46:21,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-07-22 09:46:21,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 105 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) [2022-07-22 09:46:21,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2022-07-22 09:46:21,145 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 53 [2022-07-22 09:46:21,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:21,145 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2022-07-22 09:46:21,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.8085106382978724) internal successors, (132), 47 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) [2022-07-22 09:46:21,146 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2022-07-22 09:46:21,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-22 09:46:21,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:21,146 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:21,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-22 09:46:21,351 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 [2022-07-22 09:46:21,351 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:21,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:21,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2083482327, now seen corresponding path program 13 times [2022-07-22 09:46:21,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:21,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903928427] [2022-07-22 09:46:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:21,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:21,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:21,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903928427] [2022-07-22 09:46:21,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903928427] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:21,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596361471] [2022-07-22 09:46:21,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:46:21,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:21,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:21,566 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) [2022-07-22 09:46:21,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 09:46:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:21,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 09:46:21,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:21,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:21,721 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:46:21,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 [2022-07-22 09:46:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:21,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:22,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:22,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:46:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:22,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596361471] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:22,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:22,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 29 [2022-07-22 09:46:22,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458364696] [2022-07-22 09:46:22,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:22,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 09:46:22,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:22,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 09:46:22,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-07-22 09:46:22,103 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 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) [2022-07-22 09:46:22,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:22,746 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2022-07-22 09:46:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-22 09:46:22,747 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-22 09:46:22,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:22,748 INFO L225 Difference]: With dead ends: 155 [2022-07-22 09:46:22,748 INFO L226 Difference]: Without dead ends: 153 [2022-07-22 09:46:22,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 96 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=2516, Unknown=0, NotChecked=0, Total=2756 [2022-07-22 09:46:22,749 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 80 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:22,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 477 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 964 Invalid, 0 Unknown, 5 Unchecked, 0.4s Time] [2022-07-22 09:46:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-22 09:46:22,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 111. [2022-07-22 09:46:22,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1454545454545455) internal successors, (126), 110 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) [2022-07-22 09:46:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 126 transitions. [2022-07-22 09:46:22,764 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 126 transitions. Word has length 56 [2022-07-22 09:46:22,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:22,765 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 126 transitions. [2022-07-22 09:46:22,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 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) [2022-07-22 09:46:22,765 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 126 transitions. [2022-07-22 09:46:22,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 09:46:22,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:22,765 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:22,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-22 09:46:22,966 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 [2022-07-22 09:46:22,966 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:22,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:22,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1593933100, now seen corresponding path program 14 times [2022-07-22 09:46:22,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:22,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905598736] [2022-07-22 09:46:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:22,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:23,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:23,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905598736] [2022-07-22 09:46:23,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905598736] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:23,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617746493] [2022-07-22 09:46:23,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:46:23,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:23,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:23,228 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) [2022-07-22 09:46:23,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 09:46:23,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:46:23,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:23,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-22 09:46:23,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:23,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:23,385 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:23,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:46:23,417 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:23,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:46:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 2 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:23,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:23,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:23,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:46:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:46:23,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617746493] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:23,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:23,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 30 [2022-07-22 09:46:23,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669863751] [2022-07-22 09:46:23,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:23,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-22 09:46:23,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:23,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-22 09:46:23,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-07-22 09:46:23,818 INFO L87 Difference]: Start difference. First operand 111 states and 126 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 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) [2022-07-22 09:46:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:24,467 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2022-07-22 09:46:24,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-22 09:46:24,467 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 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) Word has length 59 [2022-07-22 09:46:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:24,468 INFO L225 Difference]: With dead ends: 150 [2022-07-22 09:46:24,468 INFO L226 Difference]: Without dead ends: 148 [2022-07-22 09:46:24,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 101 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=226, Invalid=2126, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 09:46:24,469 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 56 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:24,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 461 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 09:46:24,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-22 09:46:24,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 110. [2022-07-22 09:46:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.146788990825688) internal successors, (125), 109 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:24,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2022-07-22 09:46:24,483 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 59 [2022-07-22 09:46:24,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:24,484 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2022-07-22 09:46:24,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 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) [2022-07-22 09:46:24,484 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2022-07-22 09:46:24,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 09:46:24,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:24,485 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:24,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:24,703 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 [2022-07-22 09:46:24,703 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:24,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:24,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1222421299, now seen corresponding path program 15 times [2022-07-22 09:46:24,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:24,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052199277] [2022-07-22 09:46:24,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:24,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:24,958 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:24,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:24,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052199277] [2022-07-22 09:46:24,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052199277] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:24,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520447400] [2022-07-22 09:46:24,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:46:24,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:24,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:24,959 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) [2022-07-22 09:46:24,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 09:46:25,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-22 09:46:25,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:25,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 09:46:25,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:25,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:25,765 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:46:25,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 [2022-07-22 09:46:25,786 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 91 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:25,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:26,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:26,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 28 [2022-07-22 09:46:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 84 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:26,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520447400] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:26,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:26,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 52 [2022-07-22 09:46:26,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210915166] [2022-07-22 09:46:26,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:26,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 09:46:26,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:26,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 09:46:26,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2323, Unknown=0, NotChecked=0, Total=2652 [2022-07-22 09:46:26,388 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 52 states, 52 states have (on average 2.8846153846153846) internal successors, (150), 52 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:27,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:27,239 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2022-07-22 09:46:27,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-22 09:46:27,240 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.8846153846153846) internal successors, (150), 52 states have internal predecessors, (150), 0 states have call successors, (0), 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 [2022-07-22 09:46:27,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:27,240 INFO L225 Difference]: With dead ends: 146 [2022-07-22 09:46:27,240 INFO L226 Difference]: Without dead ends: 110 [2022-07-22 09:46:27,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=781, Invalid=6191, Unknown=0, NotChecked=0, Total=6972 [2022-07-22 09:46:27,242 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:27,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 344 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 267 Invalid, 0 Unknown, 196 Unchecked, 0.1s Time] [2022-07-22 09:46:27,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-22 09:46:27,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-07-22 09:46:27,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1376146788990826) internal successors, (124), 109 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:27,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 124 transitions. [2022-07-22 09:46:27,263 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 124 transitions. Word has length 60 [2022-07-22 09:46:27,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:27,263 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 124 transitions. [2022-07-22 09:46:27,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.8846153846153846) internal successors, (150), 52 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:27,264 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 124 transitions. [2022-07-22 09:46:27,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 09:46:27,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:27,264 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:27,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:27,464 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 [2022-07-22 09:46:27,465 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:27,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:27,465 INFO L85 PathProgramCache]: Analyzing trace with hash -481676126, now seen corresponding path program 16 times [2022-07-22 09:46:27,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:27,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088708464] [2022-07-22 09:46:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:27,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:27,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:27,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088708464] [2022-07-22 09:46:27,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088708464] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:27,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834950898] [2022-07-22 09:46:27,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:46:27,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:27,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:27,731 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) [2022-07-22 09:46:27,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 09:46:27,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:46:27,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:27,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 09:46:27,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:27,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:27,880 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:46:27,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 [2022-07-22 09:46:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:28,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:28,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:28,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:46:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:28,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834950898] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:28,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:28,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 22] total 32 [2022-07-22 09:46:28,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793396977] [2022-07-22 09:46:28,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:28,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-22 09:46:28,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:28,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-22 09:46:28,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-07-22 09:46:28,264 INFO L87 Difference]: Start difference. First operand 110 states and 124 transitions. Second operand has 32 states, 32 states have (on average 3.15625) internal successors, (101), 32 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:28,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:28,917 INFO L93 Difference]: Finished difference Result 163 states and 176 transitions. [2022-07-22 09:46:28,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-22 09:46:28,919 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.15625) internal successors, (101), 32 states have internal predecessors, (101), 0 states have call successors, (0), 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 63 [2022-07-22 09:46:28,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:28,919 INFO L225 Difference]: With dead ends: 163 [2022-07-22 09:46:28,920 INFO L226 Difference]: Without dead ends: 161 [2022-07-22 09:46:28,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 109 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=267, Invalid=3155, Unknown=0, NotChecked=0, Total=3422 [2022-07-22 09:46:28,921 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 108 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:28,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 490 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 909 Invalid, 0 Unknown, 19 Unchecked, 0.3s Time] [2022-07-22 09:46:28,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-22 09:46:28,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 115. [2022-07-22 09:46:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.131578947368421) internal successors, (129), 114 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:28,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2022-07-22 09:46:28,937 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 63 [2022-07-22 09:46:28,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:28,937 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2022-07-22 09:46:28,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.15625) internal successors, (101), 32 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:28,937 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2022-07-22 09:46:28,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 09:46:28,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:28,938 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:28,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:29,138 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 [2022-07-22 09:46:29,139 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:29,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:29,139 INFO L85 PathProgramCache]: Analyzing trace with hash -484194131, now seen corresponding path program 17 times [2022-07-22 09:46:29,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:29,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718677869] [2022-07-22 09:46:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:29,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:29,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:29,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718677869] [2022-07-22 09:46:29,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718677869] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:29,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33290012] [2022-07-22 09:46:29,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:46:29,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:29,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:29,448 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) [2022-07-22 09:46:29,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 09:46:29,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-22 09:46:29,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:29,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 09:46:29,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:29,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:29,621 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:29,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:46:29,654 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:29,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:46:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 2 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:29,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:30,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:30,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:46:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:46:30,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33290012] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:30,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:30,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 33 [2022-07-22 09:46:30,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828452203] [2022-07-22 09:46:30,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:30,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 09:46:30,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:30,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 09:46:30,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 09:46:30,167 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand has 33 states, 33 states have (on average 3.212121212121212) internal successors, (106), 33 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) [2022-07-22 09:46:30,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:30,830 INFO L93 Difference]: Finished difference Result 158 states and 171 transitions. [2022-07-22 09:46:30,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-22 09:46:30,831 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.212121212121212) internal successors, (106), 33 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 66 [2022-07-22 09:46:30,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:30,832 INFO L225 Difference]: With dead ends: 158 [2022-07-22 09:46:30,832 INFO L226 Difference]: Without dead ends: 156 [2022-07-22 09:46:30,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=2614, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 09:46:30,833 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 90 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:30,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 516 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 09:46:30,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-22 09:46:30,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 114. [2022-07-22 09:46:30,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1327433628318584) internal successors, (128), 113 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) [2022-07-22 09:46:30,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2022-07-22 09:46:30,853 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 66 [2022-07-22 09:46:30,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:30,853 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2022-07-22 09:46:30,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.212121212121212) internal successors, (106), 33 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) [2022-07-22 09:46:30,853 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2022-07-22 09:46:30,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 09:46:30,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:30,854 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:30,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:31,070 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 [2022-07-22 09:46:31,071 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:31,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:31,071 INFO L85 PathProgramCache]: Analyzing trace with hash 484327704, now seen corresponding path program 18 times [2022-07-22 09:46:31,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:31,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240026909] [2022-07-22 09:46:31,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:31,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:31,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:31,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240026909] [2022-07-22 09:46:31,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240026909] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:31,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858833444] [2022-07-22 09:46:31,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:46:31,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:31,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:31,380 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) [2022-07-22 09:46:31,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 09:46:31,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-22 09:46:31,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:31,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 09:46:31,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:31,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:32,316 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:46:32,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 [2022-07-22 09:46:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 120 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:32,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:33,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:33,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 28 [2022-07-22 09:46:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 112 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:33,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858833444] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:33,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:33,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 57 [2022-07-22 09:46:33,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802797918] [2022-07-22 09:46:33,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:33,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-22 09:46:33,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:33,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-22 09:46:33,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2805, Unknown=0, NotChecked=0, Total=3192 [2022-07-22 09:46:33,051 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand has 57 states, 57 states have (on average 2.9473684210526314) internal successors, (168), 57 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:33,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:33,838 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2022-07-22 09:46:33,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-22 09:46:33,838 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.9473684210526314) internal successors, (168), 57 states have internal predecessors, (168), 0 states have call successors, (0), 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 67 [2022-07-22 09:46:33,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:33,839 INFO L225 Difference]: With dead ends: 155 [2022-07-22 09:46:33,839 INFO L226 Difference]: Without dead ends: 115 [2022-07-22 09:46:33,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=779, Invalid=6361, Unknown=0, NotChecked=0, Total=7140 [2022-07-22 09:46:33,841 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:33,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 352 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 382 Invalid, 0 Unknown, 110 Unchecked, 0.1s Time] [2022-07-22 09:46:33,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-22 09:46:33,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-07-22 09:46:33,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 113 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) [2022-07-22 09:46:33,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2022-07-22 09:46:33,857 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 67 [2022-07-22 09:46:33,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:33,857 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2022-07-22 09:46:33,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.9473684210526314) internal successors, (168), 57 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:33,857 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2022-07-22 09:46:33,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-22 09:46:33,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:33,858 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:33,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-22 09:46:34,071 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 [2022-07-22 09:46:34,071 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:34,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:34,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1368860765, now seen corresponding path program 19 times [2022-07-22 09:46:34,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:34,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43257458] [2022-07-22 09:46:34,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:34,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:34,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:34,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43257458] [2022-07-22 09:46:34,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43257458] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:34,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693625957] [2022-07-22 09:46:34,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:46:34,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:34,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:34,343 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) [2022-07-22 09:46:34,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-22 09:46:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:34,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-22 09:46:34,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:34,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:34,506 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:46:34,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 [2022-07-22 09:46:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:34,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:34,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:34,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:46:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:35,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693625957] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:35,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:35,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24] total 35 [2022-07-22 09:46:35,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098636518] [2022-07-22 09:46:35,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:35,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-22 09:46:35,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:35,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-22 09:46:35,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 09:46:35,021 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand has 35 states, 35 states have (on average 3.2) internal successors, (112), 35 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) [2022-07-22 09:46:35,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:35,859 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2022-07-22 09:46:35,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-22 09:46:35,859 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.2) internal successors, (112), 35 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 70 [2022-07-22 09:46:35,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:35,860 INFO L225 Difference]: With dead ends: 171 [2022-07-22 09:46:35,860 INFO L226 Difference]: Without dead ends: 169 [2022-07-22 09:46:35,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 122 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=294, Invalid=3866, Unknown=0, NotChecked=0, Total=4160 [2022-07-22 09:46:35,861 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 92 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:35,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 658 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1354 Invalid, 0 Unknown, 9 Unchecked, 0.5s Time] [2022-07-22 09:46:35,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-22 09:46:35,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 119. [2022-07-22 09:46:35,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.11864406779661) internal successors, (132), 118 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) [2022-07-22 09:46:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2022-07-22 09:46:35,879 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 70 [2022-07-22 09:46:35,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:35,879 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2022-07-22 09:46:35,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.2) internal successors, (112), 35 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) [2022-07-22 09:46:35,879 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2022-07-22 09:46:35,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-22 09:46:35,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:35,880 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:35,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-22 09:46:36,084 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 [2022-07-22 09:46:36,084 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:36,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:36,084 INFO L85 PathProgramCache]: Analyzing trace with hash 2098049336, now seen corresponding path program 20 times [2022-07-22 09:46:36,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:36,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768545806] [2022-07-22 09:46:36,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:36,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:36,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:36,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768545806] [2022-07-22 09:46:36,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768545806] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:36,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890374354] [2022-07-22 09:46:36,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:46:36,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:36,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:36,436 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) [2022-07-22 09:46:36,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-22 09:46:36,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:46:36,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:36,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-22 09:46:36,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:36,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:36,610 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:36,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:46:36,642 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:36,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:46:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 2 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:36,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:37,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:37,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:46:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 303 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:46:37,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890374354] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:37,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:37,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 25] total 36 [2022-07-22 09:46:37,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870303906] [2022-07-22 09:46:37,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:37,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-22 09:46:37,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:37,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-22 09:46:37,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 09:46:37,108 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand has 36 states, 36 states have (on average 3.25) internal successors, (117), 36 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:37,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:37,841 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2022-07-22 09:46:37,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-22 09:46:37,841 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.25) internal successors, (117), 36 states have internal predecessors, (117), 0 states have call successors, (0), 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 [2022-07-22 09:46:37,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:37,842 INFO L225 Difference]: With dead ends: 166 [2022-07-22 09:46:37,842 INFO L226 Difference]: Without dead ends: 164 [2022-07-22 09:46:37,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 127 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=270, Invalid=3152, Unknown=0, NotChecked=0, Total=3422 [2022-07-22 09:46:37,843 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 76 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:37,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 588 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 09:46:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-22 09:46:37,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 118. [2022-07-22 09:46:37,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 117 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:37,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 131 transitions. [2022-07-22 09:46:37,859 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 131 transitions. Word has length 73 [2022-07-22 09:46:37,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:37,859 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 131 transitions. [2022-07-22 09:46:37,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.25) internal successors, (117), 36 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:37,859 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 131 transitions. [2022-07-22 09:46:37,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-22 09:46:37,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:37,860 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:37,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-22 09:46:38,060 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 [2022-07-22 09:46:38,060 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:38,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:38,061 INFO L85 PathProgramCache]: Analyzing trace with hash 570522521, now seen corresponding path program 21 times [2022-07-22 09:46:38,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:38,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391898101] [2022-07-22 09:46:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:38,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:38,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:38,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391898101] [2022-07-22 09:46:38,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391898101] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:38,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90162556] [2022-07-22 09:46:38,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:46:38,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:38,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:38,367 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) [2022-07-22 09:46:38,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-22 09:46:38,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-22 09:46:38,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:38,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 09:46:38,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:38,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:39,455 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:46:39,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 [2022-07-22 09:46:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 153 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:39,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:40,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:40,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 28 [2022-07-22 09:46:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 144 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:40,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90162556] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:40,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:40,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 62 [2022-07-22 09:46:40,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011672600] [2022-07-22 09:46:40,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:40,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-22 09:46:40,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:40,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-22 09:46:40,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=3331, Unknown=1, NotChecked=0, Total=3782 [2022-07-22 09:46:40,482 INFO L87 Difference]: Start difference. First operand 118 states and 131 transitions. Second operand has 62 states, 62 states have (on average 3.0) internal successors, (186), 62 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:41,449 INFO L93 Difference]: Finished difference Result 163 states and 176 transitions. [2022-07-22 09:46:41,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-22 09:46:41,450 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.0) internal successors, (186), 62 states have internal predecessors, (186), 0 states have call successors, (0), 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 74 [2022-07-22 09:46:41,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:41,450 INFO L225 Difference]: With dead ends: 163 [2022-07-22 09:46:41,450 INFO L226 Difference]: Without dead ends: 119 [2022-07-22 09:46:41,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=905, Invalid=7650, Unknown=1, NotChecked=0, Total=8556 [2022-07-22 09:46:41,451 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 77 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:41,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 477 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 478 Invalid, 0 Unknown, 145 Unchecked, 0.2s Time] [2022-07-22 09:46:41,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-22 09:46:41,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-07-22 09:46:41,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.1111111111111112) internal successors, (130), 117 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:41,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 130 transitions. [2022-07-22 09:46:41,471 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 130 transitions. Word has length 74 [2022-07-22 09:46:41,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:41,471 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 130 transitions. [2022-07-22 09:46:41,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.0) internal successors, (186), 62 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:41,472 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 130 transitions. [2022-07-22 09:46:41,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-22 09:46:41,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:41,472 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:41,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-22 09:46:41,678 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 [2022-07-22 09:46:41,678 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:41,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:41,678 INFO L85 PathProgramCache]: Analyzing trace with hash -121273682, now seen corresponding path program 22 times [2022-07-22 09:46:41,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:41,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979636173] [2022-07-22 09:46:41,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:41,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:42,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:42,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979636173] [2022-07-22 09:46:42,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979636173] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:42,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511108454] [2022-07-22 09:46:42,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:46:42,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:42,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:42,071 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) [2022-07-22 09:46:42,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-22 09:46:42,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:46:42,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:42,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-22 09:46:42,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:42,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:42,285 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:46:42,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 [2022-07-22 09:46:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:42,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:42,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:42,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:46:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:42,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511108454] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:42,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:42,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 38 [2022-07-22 09:46:42,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686596032] [2022-07-22 09:46:42,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:42,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-22 09:46:42,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:42,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-22 09:46:42,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 09:46:42,784 INFO L87 Difference]: Start difference. First operand 118 states and 130 transitions. Second operand has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 38 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) [2022-07-22 09:46:43,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:43,743 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2022-07-22 09:46:43,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-22 09:46:43,743 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 38 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) Word has length 77 [2022-07-22 09:46:43,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:43,744 INFO L225 Difference]: With dead ends: 179 [2022-07-22 09:46:43,744 INFO L226 Difference]: Without dead ends: 177 [2022-07-22 09:46:43,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 135 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=321, Invalid=4649, Unknown=0, NotChecked=0, Total=4970 [2022-07-22 09:46:43,745 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 96 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:43,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 765 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1482 Invalid, 0 Unknown, 62 Unchecked, 0.5s Time] [2022-07-22 09:46:43,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-22 09:46:43,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 123. [2022-07-22 09:46:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 122 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) [2022-07-22 09:46:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135 transitions. [2022-07-22 09:46:43,764 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 135 transitions. Word has length 77 [2022-07-22 09:46:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:43,764 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 135 transitions. [2022-07-22 09:46:43,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 38 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) [2022-07-22 09:46:43,764 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 135 transitions. [2022-07-22 09:46:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-22 09:46:43,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:43,765 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:43,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-22 09:46:43,979 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 [2022-07-22 09:46:43,979 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:43,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:43,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1608606184, now seen corresponding path program 3 times [2022-07-22 09:46:43,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:43,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90420698] [2022-07-22 09:46:43,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:43,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:43,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 37 proven. 495 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:46:44,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:44,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90420698] [2022-07-22 09:46:44,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90420698] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:44,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086549632] [2022-07-22 09:46:44,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:46:44,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:44,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:44,176 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) [2022-07-22 09:46:44,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-22 09:46:44,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 09:46:44,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:44,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 09:46:44,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 37 proven. 18 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-07-22 09:46:44,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:44,479 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 37 proven. 18 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-07-22 09:46:44,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086549632] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:44,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:44,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 4, 4] total 27 [2022-07-22 09:46:44,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479637451] [2022-07-22 09:46:44,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:44,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 09:46:44,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:44,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 09:46:44,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-07-22 09:46:44,483 INFO L87 Difference]: Start difference. First operand 123 states and 135 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:44,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:44,988 INFO L93 Difference]: Finished difference Result 259 states and 274 transitions. [2022-07-22 09:46:44,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 09:46:44,989 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 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 [2022-07-22 09:46:44,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:44,990 INFO L225 Difference]: With dead ends: 259 [2022-07-22 09:46:44,990 INFO L226 Difference]: Without dead ends: 215 [2022-07-22 09:46:44,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=857, Invalid=1495, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 09:46:44,995 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 675 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:44,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 74 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:46:44,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-07-22 09:46:45,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 86. [2022-07-22 09:46:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.035294117647059) internal successors, (88), 85 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2022-07-22 09:46:45,014 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 77 [2022-07-22 09:46:45,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:45,014 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2022-07-22 09:46:45,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:45,015 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2022-07-22 09:46:45,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-22 09:46:45,015 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:45,015 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:45,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-22 09:46:45,221 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 [2022-07-22 09:46:45,221 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:45,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:45,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2126096249, now seen corresponding path program 23 times [2022-07-22 09:46:45,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:45,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967089733] [2022-07-22 09:46:45,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:45,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:45,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:45,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967089733] [2022-07-22 09:46:45,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967089733] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:45,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435280961] [2022-07-22 09:46:45,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:46:45,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:45,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:45,629 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) [2022-07-22 09:46:45,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-22 09:46:45,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-07-22 09:46:45,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:45,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-22 09:46:45,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:45,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:45,891 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:45,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:46:45,922 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:45,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:46:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 2 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:46,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:46,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:46,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:46:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 371 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:46:46,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435280961] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:46,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:46,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 27] total 39 [2022-07-22 09:46:46,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439427038] [2022-07-22 09:46:46,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:46,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 09:46:46,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:46,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 09:46:46,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 09:46:46,445 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 39 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) [2022-07-22 09:46:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:47,461 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2022-07-22 09:46:47,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-22 09:46:47,462 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 39 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 80 [2022-07-22 09:46:47,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:47,462 INFO L225 Difference]: With dead ends: 134 [2022-07-22 09:46:47,462 INFO L226 Difference]: Without dead ends: 132 [2022-07-22 09:46:47,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 140 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=292, Invalid=3740, Unknown=0, NotChecked=0, Total=4032 [2022-07-22 09:46:47,463 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 71 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:47,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 701 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 09:46:47,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-22 09:46:47,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 82. [2022-07-22 09:46:47,489 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) [2022-07-22 09:46:47,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-07-22 09:46:47,489 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2022-07-22 09:46:47,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:47,489 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-07-22 09:46:47,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 39 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) [2022-07-22 09:46:47,490 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-07-22 09:46:47,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-22 09:46:47,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:47,490 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:47,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-22 09:46:47,690 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 [2022-07-22 09:46:47,690 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:47,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:47,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1219209508, now seen corresponding path program 24 times [2022-07-22 09:46:47,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:47,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123211126] [2022-07-22 09:46:47,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:47,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:48,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:48,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123211126] [2022-07-22 09:46:48,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123211126] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:48,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291249683] [2022-07-22 09:46:48,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:46:48,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:48,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:48,080 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) [2022-07-22 09:46:48,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-22 09:46:48,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-22 09:46:48,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:48,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-22 09:46:48,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:48,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:49,310 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:46:49,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 [2022-07-22 09:46:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 190 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:49,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:50,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:50,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 28 [2022-07-22 09:46:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 180 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:50,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291249683] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:50,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:50,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 67 [2022-07-22 09:46:50,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717629487] [2022-07-22 09:46:50,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:50,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-22 09:46:50,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:50,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-22 09:46:50,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=3904, Unknown=0, NotChecked=0, Total=4422 [2022-07-22 09:46:50,242 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 67 states, 67 states have (on average 3.044776119402985) internal successors, (204), 67 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:51,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:51,636 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2022-07-22 09:46:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-22 09:46:51,637 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.044776119402985) internal successors, (204), 67 states have internal predecessors, (204), 0 states have call successors, (0), 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 [2022-07-22 09:46:51,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:51,637 INFO L225 Difference]: With dead ends: 133 [2022-07-22 09:46:51,637 INFO L226 Difference]: Without dead ends: 85 [2022-07-22 09:46:51,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2372 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1269, Invalid=11163, Unknown=0, NotChecked=0, Total=12432 [2022-07-22 09:46:51,639 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:51,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 585 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 593 Invalid, 0 Unknown, 188 Unchecked, 0.2s Time] [2022-07-22 09:46:51,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-22 09:46:51,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-07-22 09:46:51,669 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) [2022-07-22 09:46:51,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-07-22 09:46:51,670 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 81 [2022-07-22 09:46:51,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:51,670 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-07-22 09:46:51,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.044776119402985) internal successors, (204), 67 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:51,671 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-07-22 09:46:51,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-22 09:46:51,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:51,671 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:51,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-22 09:46:51,872 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 [2022-07-22 09:46:51,872 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:51,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:51,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1155895185, now seen corresponding path program 25 times [2022-07-22 09:46:51,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:51,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926328132] [2022-07-22 09:46:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:51,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:52,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:52,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926328132] [2022-07-22 09:46:52,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926328132] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:52,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907108476] [2022-07-22 09:46:52,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:46:52,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:52,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:52,241 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) [2022-07-22 09:46:52,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-22 09:46:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:52,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-22 09:46:52,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:52,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:52,459 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:46:52,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 [2022-07-22 09:46:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:52,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:52,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:52,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:46:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:53,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907108476] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:53,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:53,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 28] total 41 [2022-07-22 09:46:53,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486435561] [2022-07-22 09:46:53,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:53,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-22 09:46:53,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:53,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-22 09:46:53,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1511, Unknown=0, NotChecked=0, Total=1640 [2022-07-22 09:46:53,013 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:54,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:54,131 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2022-07-22 09:46:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-22 09:46:54,131 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 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 [2022-07-22 09:46:54,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:54,132 INFO L225 Difference]: With dead ends: 150 [2022-07-22 09:46:54,132 INFO L226 Difference]: Without dead ends: 148 [2022-07-22 09:46:54,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 148 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=348, Invalid=5504, Unknown=0, NotChecked=0, Total=5852 [2022-07-22 09:46:54,133 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 128 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:54,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 780 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1774 Invalid, 0 Unknown, 9 Unchecked, 0.6s Time] [2022-07-22 09:46:54,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-22 09:46:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 93. [2022-07-22 09:46:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 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) [2022-07-22 09:46:54,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-07-22 09:46:54,162 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 84 [2022-07-22 09:46:54,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:54,163 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-07-22 09:46:54,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-07-22 09:46:54,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 09:46:54,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:54,164 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:54,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:54,387 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 [2022-07-22 09:46:54,387 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:54,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:54,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1686397252, now seen corresponding path program 26 times [2022-07-22 09:46:54,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:54,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39131930] [2022-07-22 09:46:54,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:54,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 447 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:54,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:54,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39131930] [2022-07-22 09:46:54,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39131930] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:54,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443918280] [2022-07-22 09:46:54,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:46:54,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:54,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:54,852 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) [2022-07-22 09:46:54,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-22 09:46:54,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:46:54,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:54,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-22 09:46:54,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:55,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:55,081 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:55,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:46:55,115 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:55,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:46:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 2 proven. 445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:55,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:55,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:55,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:46:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 446 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:46:55,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443918280] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:55,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:55,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 42 [2022-07-22 09:46:55,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377430169] [2022-07-22 09:46:55,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:55,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-22 09:46:55,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:55,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-22 09:46:55,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 09:46:55,701 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 42 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) [2022-07-22 09:46:56,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:56,721 INFO L93 Difference]: Finished difference Result 145 states and 147 transitions. [2022-07-22 09:46:56,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-22 09:46:56,722 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 42 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 87 [2022-07-22 09:46:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:56,722 INFO L225 Difference]: With dead ends: 145 [2022-07-22 09:46:56,722 INFO L226 Difference]: Without dead ends: 143 [2022-07-22 09:46:56,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 153 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=4378, Unknown=0, NotChecked=0, Total=4692 [2022-07-22 09:46:56,723 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 80 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:56,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 768 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1922 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 09:46:56,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-22 09:46:56,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 89. [2022-07-22 09:46:56,748 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) [2022-07-22 09:46:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-07-22 09:46:56,749 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 87 [2022-07-22 09:46:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:56,749 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-07-22 09:46:56,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 42 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) [2022-07-22 09:46:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-07-22 09:46:56,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-22 09:46:56,750 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:56,750 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:56,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:56,973 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 [2022-07-22 09:46:56,973 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:56,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:56,973 INFO L85 PathProgramCache]: Analyzing trace with hash -681456027, now seen corresponding path program 27 times [2022-07-22 09:46:56,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:56,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886372834] [2022-07-22 09:46:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:56,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:57,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:57,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886372834] [2022-07-22 09:46:57,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886372834] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:57,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998119719] [2022-07-22 09:46:57,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:46:57,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:57,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:57,366 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) [2022-07-22 09:46:57,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-22 09:46:57,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-22 09:46:57,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:57,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-22 09:46:57,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:57,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:58,746 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:46:58,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 [2022-07-22 09:46:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 231 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:58,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:59,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:46:59,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 28 [2022-07-22 09:46:59,880 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 220 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:59,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998119719] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:59,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:59,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 72 [2022-07-22 09:46:59,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380798182] [2022-07-22 09:46:59,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:59,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-22 09:46:59,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:59,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-22 09:46:59,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=4521, Unknown=0, NotChecked=0, Total=5112 [2022-07-22 09:46:59,883 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 72 states, 72 states have (on average 3.0833333333333335) internal successors, (222), 72 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:01,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:01,144 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2022-07-22 09:47:01,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-22 09:47:01,145 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.0833333333333335) internal successors, (222), 72 states have internal predecessors, (222), 0 states have call successors, (0), 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 [2022-07-22 09:47:01,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:01,145 INFO L225 Difference]: With dead ends: 144 [2022-07-22 09:47:01,145 INFO L226 Difference]: Without dead ends: 92 [2022-07-22 09:47:01,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2157 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1184, Invalid=10588, Unknown=0, NotChecked=0, Total=11772 [2022-07-22 09:47:01,146 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 62 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:01,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 621 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 631 Invalid, 0 Unknown, 183 Unchecked, 0.2s Time] [2022-07-22 09:47:01,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-22 09:47:01,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-07-22 09:47:01,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 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) [2022-07-22 09:47:01,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-07-22 09:47:01,183 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 88 [2022-07-22 09:47:01,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:01,184 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-07-22 09:47:01,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.0833333333333335) internal successors, (222), 72 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:01,184 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-07-22 09:47:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 09:47:01,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:01,185 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:01,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-22 09:47:01,407 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 [2022-07-22 09:47:01,407 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:01,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:01,408 INFO L85 PathProgramCache]: Analyzing trace with hash -435336006, now seen corresponding path program 28 times [2022-07-22 09:47:01,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:01,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528734725] [2022-07-22 09:47:01,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:01,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:01,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:01,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528734725] [2022-07-22 09:47:01,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528734725] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:01,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882772202] [2022-07-22 09:47:01,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:47:01,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:01,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:01,854 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) [2022-07-22 09:47:01,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-22 09:47:01,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:47:01,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:01,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-22 09:47:01,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:02,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:02,083 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:47:02,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 [2022-07-22 09:47:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:02,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:02,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:02,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:47:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:02,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882772202] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:02,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:02,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 30] total 44 [2022-07-22 09:47:02,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390472376] [2022-07-22 09:47:02,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:02,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-22 09:47:02,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:02,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-22 09:47:02,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1753, Unknown=0, NotChecked=0, Total=1892 [2022-07-22 09:47:02,730 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 44 states, 44 states have (on average 3.2954545454545454) internal successors, (145), 44 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:04,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:04,016 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2022-07-22 09:47:04,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-22 09:47:04,016 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.2954545454545454) internal successors, (145), 44 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-07-22 09:47:04,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:04,017 INFO L225 Difference]: With dead ends: 161 [2022-07-22 09:47:04,017 INFO L226 Difference]: Without dead ends: 159 [2022-07-22 09:47:04,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 161 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=375, Invalid=6431, Unknown=0, NotChecked=0, Total=6806 [2022-07-22 09:47:04,018 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 108 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:04,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 930 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2022 Invalid, 0 Unknown, 71 Unchecked, 0.7s Time] [2022-07-22 09:47:04,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-22 09:47:04,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 100. [2022-07-22 09:47:04,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:04,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-07-22 09:47:04,059 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 91 [2022-07-22 09:47:04,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:04,060 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-07-22 09:47:04,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.2954545454545454) internal successors, (145), 44 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:04,060 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-07-22 09:47:04,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-22 09:47:04,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:04,061 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:04,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-22 09:47:04,263 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 [2022-07-22 09:47:04,263 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:04,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:04,264 INFO L85 PathProgramCache]: Analyzing trace with hash 217035333, now seen corresponding path program 29 times [2022-07-22 09:47:04,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:04,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586933037] [2022-07-22 09:47:04,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:04,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:04,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:04,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586933037] [2022-07-22 09:47:04,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586933037] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:04,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326536075] [2022-07-22 09:47:04,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:47:04,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:04,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:04,696 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) [2022-07-22 09:47:04,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-22 09:47:04,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-07-22 09:47:04,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:04,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-22 09:47:04,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:05,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:05,055 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:47:05,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:47:05,091 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:47:05,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:47:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 2 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:05,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:05,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:05,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:47:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:47:05,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326536075] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:05,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:05,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 45 [2022-07-22 09:47:05,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893271547] [2022-07-22 09:47:05,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:05,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-22 09:47:05,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:05,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-22 09:47:05,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1835, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 09:47:05,767 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 45 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 45 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:06,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:06,967 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2022-07-22 09:47:06,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-22 09:47:06,967 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 45 states have internal predecessors, (150), 0 states have call successors, (0), 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 94 [2022-07-22 09:47:06,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:06,968 INFO L225 Difference]: With dead ends: 156 [2022-07-22 09:47:06,968 INFO L226 Difference]: Without dead ends: 154 [2022-07-22 09:47:06,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 166 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=336, Invalid=5066, Unknown=0, NotChecked=0, Total=5402 [2022-07-22 09:47:06,969 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 81 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:06,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 921 Invalid, 2253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2155 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 09:47:06,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-22 09:47:06,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 96. [2022-07-22 09:47:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:06,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2022-07-22 09:47:06,995 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 94 [2022-07-22 09:47:06,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:06,995 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2022-07-22 09:47:06,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 45 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2022-07-22 09:47:06,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-22 09:47:06,996 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:06,996 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:07,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-22 09:47:07,196 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 [2022-07-22 09:47:07,197 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:07,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:07,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1504152880, now seen corresponding path program 30 times [2022-07-22 09:47:07,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:07,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425221335] [2022-07-22 09:47:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:07,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:07,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:07,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425221335] [2022-07-22 09:47:07,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425221335] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:07,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555393731] [2022-07-22 09:47:07,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:47:07,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:07,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:07,785 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) [2022-07-22 09:47:07,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-22 09:47:08,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-22 09:47:08,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:08,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-22 09:47:08,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:08,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:09,540 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:47:09,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 [2022-07-22 09:47:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 276 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:09,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:10,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:10,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 28 [2022-07-22 09:47:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 264 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:10,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555393731] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:10,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:10,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32, 32] total 76 [2022-07-22 09:47:10,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496776173] [2022-07-22 09:47:10,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:10,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-22 09:47:10,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:10,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-22 09:47:10,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=796, Invalid=4904, Unknown=0, NotChecked=0, Total=5700 [2022-07-22 09:47:10,606 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 76 states, 76 states have (on average 3.1578947368421053) internal successors, (240), 76 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:11,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:11,909 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2022-07-22 09:47:11,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-22 09:47:11,910 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.1578947368421053) internal successors, (240), 76 states have internal predecessors, (240), 0 states have call successors, (0), 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 95 [2022-07-22 09:47:11,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:11,910 INFO L225 Difference]: With dead ends: 155 [2022-07-22 09:47:11,910 INFO L226 Difference]: Without dead ends: 99 [2022-07-22 09:47:11,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3461 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1649, Invalid=11691, Unknown=0, NotChecked=0, Total=13340 [2022-07-22 09:47:11,911 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 152 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:11,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 574 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 507 Invalid, 0 Unknown, 150 Unchecked, 0.2s Time] [2022-07-22 09:47:11,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-22 09:47:11,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-07-22 09:47:11,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 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) [2022-07-22 09:47:11,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-07-22 09:47:11,945 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 95 [2022-07-22 09:47:11,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:11,945 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-07-22 09:47:11,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.1578947368421053) internal successors, (240), 76 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:11,945 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-07-22 09:47:11,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-22 09:47:11,945 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:11,945 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:11,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:12,146 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 [2022-07-22 09:47:12,146 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:12,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:12,146 INFO L85 PathProgramCache]: Analyzing trace with hash -696896197, now seen corresponding path program 31 times [2022-07-22 09:47:12,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:12,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515176799] [2022-07-22 09:47:12,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:12,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:12,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:12,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515176799] [2022-07-22 09:47:12,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515176799] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:12,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570309362] [2022-07-22 09:47:12,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:47:12,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:12,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:12,812 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) [2022-07-22 09:47:12,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-22 09:47:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:12,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-22 09:47:12,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:13,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:13,265 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:47:13,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:47:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:13,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:16,263 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1061| Int)) (or (forall ((v_ArrVal_1445 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1061| 4)) v_ArrVal_1445) (+ 48 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1061|)))) is different from false [2022-07-22 09:47:16,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 21 [2022-07-22 09:47:16,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 178 treesize of output 170 [2022-07-22 09:47:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 562 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2022-07-22 09:47:16,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570309362] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:16,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:16,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 32] total 76 [2022-07-22 09:47:16,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255274719] [2022-07-22 09:47:16,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:16,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-22 09:47:16,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:16,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-22 09:47:16,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=5228, Unknown=1, NotChecked=146, Total=5700 [2022-07-22 09:47:16,474 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 76 states, 76 states have (on average 3.25) internal successors, (247), 76 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:19,215 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (<= .cse0 48) (forall ((|v_ULTIMATE.start_main_~i~0#1_1061| Int)) (or (forall ((v_ArrVal_1445 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1061| 4)) v_ArrVal_1445) (+ 48 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1061|)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= 12 |c_ULTIMATE.start_main_~i~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) 0))) is different from false [2022-07-22 09:47:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:20,165 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2022-07-22 09:47:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-22 09:47:20,166 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.25) internal successors, (247), 76 states have internal predecessors, (247), 0 states have call successors, (0), 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 98 [2022-07-22 09:47:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:20,167 INFO L225 Difference]: With dead ends: 109 [2022-07-22 09:47:20,167 INFO L226 Difference]: Without dead ends: 107 [2022-07-22 09:47:20,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 153 SyntacticMatches, 10 SemanticMatches, 105 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=610, Invalid=10316, Unknown=2, NotChecked=414, Total=11342 [2022-07-22 09:47:20,168 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 146 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 2563 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 2849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:20,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1050 Invalid, 2849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2563 Invalid, 0 Unknown, 177 Unchecked, 0.9s Time] [2022-07-22 09:47:20,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-22 09:47:20,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2022-07-22 09:47:20,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 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) [2022-07-22 09:47:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-07-22 09:47:20,205 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2022-07-22 09:47:20,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:20,205 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-07-22 09:47:20,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.25) internal successors, (247), 76 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:20,205 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-07-22 09:47:20,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-22 09:47:20,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:20,206 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:20,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:20,406 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 [2022-07-22 09:47:20,406 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:20,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:20,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1569305295, now seen corresponding path program 32 times [2022-07-22 09:47:20,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:20,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141633820] [2022-07-22 09:47:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:20,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:20,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:20,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141633820] [2022-07-22 09:47:20,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141633820] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:20,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163644901] [2022-07-22 09:47:20,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:47:20,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:20,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:20,916 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) [2022-07-22 09:47:20,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-22 09:47:21,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:47:21,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:21,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-22 09:47:21,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:21,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:21,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:21,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:21,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:47:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:21,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163644901] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:21,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:21,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 47 [2022-07-22 09:47:21,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530548549] [2022-07-22 09:47:21,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:21,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-22 09:47:21,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:21,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-22 09:47:21,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2022-07-22 09:47:21,830 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 47 states, 47 states have (on average 3.425531914893617) internal successors, (161), 47 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:23,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:23,285 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2022-07-22 09:47:23,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-22 09:47:23,285 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.425531914893617) internal successors, (161), 47 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-07-22 09:47:23,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:23,286 INFO L225 Difference]: With dead ends: 114 [2022-07-22 09:47:23,286 INFO L226 Difference]: Without dead ends: 112 [2022-07-22 09:47:23,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 184 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=326, Invalid=5680, Unknown=0, NotChecked=0, Total=6006 [2022-07-22 09:47:23,287 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 81 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 2887 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 2986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:23,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 1024 Invalid, 2986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2887 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 09:47:23,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-22 09:47:23,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2022-07-22 09:47:23,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:23,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-07-22 09:47:23,320 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 102 [2022-07-22 09:47:23,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:23,320 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-07-22 09:47:23,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.425531914893617) internal successors, (161), 47 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:23,320 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-07-22 09:47:23,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-22 09:47:23,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:23,321 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:23,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-22 09:47:23,521 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 [2022-07-22 09:47:23,521 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:23,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:23,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1071810009, now seen corresponding path program 33 times [2022-07-22 09:47:23,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:23,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29095542] [2022-07-22 09:47:23,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:23,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 339 proven. 340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:23,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:23,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29095542] [2022-07-22 09:47:23,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29095542] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:23,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891937447] [2022-07-22 09:47:23,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:47:23,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:23,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:23,908 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) [2022-07-22 09:47:23,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-22 09:47:24,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-22 09:47:24,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:24,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 09:47:24,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 392 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:24,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 392 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:24,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891937447] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:24,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:24,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2022-07-22 09:47:24,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597635206] [2022-07-22 09:47:24,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:24,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-22 09:47:24,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:24,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-22 09:47:24,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 09:47:24,926 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:25,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:25,254 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2022-07-22 09:47:25,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-22 09:47:25,255 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 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 106 [2022-07-22 09:47:25,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:25,255 INFO L225 Difference]: With dead ends: 184 [2022-07-22 09:47:25,255 INFO L226 Difference]: Without dead ends: 120 [2022-07-22 09:47:25,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2022-07-22 09:47:25,257 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 277 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:25,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 246 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:47:25,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-22 09:47:25,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2022-07-22 09:47:25,291 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) [2022-07-22 09:47:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-07-22 09:47:25,291 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 106 [2022-07-22 09:47:25,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:25,291 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-07-22 09:47:25,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:25,292 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-07-22 09:47:25,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-22 09:47:25,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:25,292 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:25,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-07-22 09:47:25,492 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 [2022-07-22 09:47:25,493 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:25,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:25,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1078465220, now seen corresponding path program 34 times [2022-07-22 09:47:25,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:25,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209066937] [2022-07-22 09:47:25,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:25,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:26,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:26,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209066937] [2022-07-22 09:47:26,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209066937] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:26,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730833219] [2022-07-22 09:47:26,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:47:26,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:26,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:26,152 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) [2022-07-22 09:47:26,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-22 09:47:26,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:47:26,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:26,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-22 09:47:26,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:26,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:26,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:27,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:27,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:47:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:27,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730833219] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:27,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:27,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 50 [2022-07-22 09:47:27,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666639625] [2022-07-22 09:47:27,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:27,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-22 09:47:27,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:27,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-22 09:47:27,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 09:47:27,125 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 50 states, 50 states have (on average 3.44) internal successors, (172), 50 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:28,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:28,725 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2022-07-22 09:47:28,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-22 09:47:28,726 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.44) internal successors, (172), 50 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-07-22 09:47:28,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:28,726 INFO L225 Difference]: With dead ends: 121 [2022-07-22 09:47:28,726 INFO L226 Difference]: Without dead ends: 119 [2022-07-22 09:47:28,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 197 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=347, Invalid=6459, Unknown=0, NotChecked=0, Total=6806 [2022-07-22 09:47:28,727 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 90 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 3320 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 3428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 3320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:28,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 1184 Invalid, 3428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 3320 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 09:47:28,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-22 09:47:28,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2022-07-22 09:47:28,763 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) [2022-07-22 09:47:28,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-07-22 09:47:28,763 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 109 [2022-07-22 09:47:28,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:28,764 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-07-22 09:47:28,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.44) internal successors, (172), 50 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:28,764 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-07-22 09:47:28,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-22 09:47:28,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:28,764 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:28,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-07-22 09:47:28,971 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 [2022-07-22 09:47:28,971 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:28,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:28,972 INFO L85 PathProgramCache]: Analyzing trace with hash 606739634, now seen corresponding path program 35 times [2022-07-22 09:47:28,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:28,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793874354] [2022-07-22 09:47:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:28,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 393 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:29,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:29,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793874354] [2022-07-22 09:47:29,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793874354] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:29,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306712808] [2022-07-22 09:47:29,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:47:29,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:29,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:29,392 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) [2022-07-22 09:47:29,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-22 09:47:29,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-07-22 09:47:29,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:29,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-22 09:47:29,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 450 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:30,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 450 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:30,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306712808] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:30,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:30,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2022-07-22 09:47:30,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309604038] [2022-07-22 09:47:30,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:30,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-22 09:47:30,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:30,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-22 09:47:30,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2022-07-22 09:47:30,278 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 53 states, 53 states have (on average 3.4716981132075473) internal successors, (184), 53 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) [2022-07-22 09:47:30,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:30,608 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2022-07-22 09:47:30,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-22 09:47:30,609 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.4716981132075473) internal successors, (184), 53 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 113 [2022-07-22 09:47:30,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:30,609 INFO L225 Difference]: With dead ends: 195 [2022-07-22 09:47:30,609 INFO L226 Difference]: Without dead ends: 127 [2022-07-22 09:47:30,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2022-07-22 09:47:30,610 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 240 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:30,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 253 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:47:30,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-22 09:47:30,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2022-07-22 09:47:30,645 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) [2022-07-22 09:47:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-07-22 09:47:30,645 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 113 [2022-07-22 09:47:30,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:30,645 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-07-22 09:47:30,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.4716981132075473) internal successors, (184), 53 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) [2022-07-22 09:47:30,645 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-07-22 09:47:30,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-22 09:47:30,645 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:30,646 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:30,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-22 09:47:30,846 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 [2022-07-22 09:47:30,846 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:30,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:30,847 INFO L85 PathProgramCache]: Analyzing trace with hash -269420547, now seen corresponding path program 36 times [2022-07-22 09:47:30,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:30,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015178016] [2022-07-22 09:47:30,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:30,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:31,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:31,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015178016] [2022-07-22 09:47:31,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015178016] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:31,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268991926] [2022-07-22 09:47:31,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:47:31,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:31,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:31,495 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) [2022-07-22 09:47:31,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-22 09:47:32,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-07-22 09:47:32,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:32,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 09:47:32,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:33,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:34,682 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:47:34,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 [2022-07-22 09:47:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 435 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:34,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:36,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:36,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 28 [2022-07-22 09:47:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 420 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:36,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268991926] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:36,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:36,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 92 [2022-07-22 09:47:36,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356284685] [2022-07-22 09:47:36,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:36,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-22 09:47:36,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:36,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-22 09:47:36,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=933, Invalid=7439, Unknown=0, NotChecked=0, Total=8372 [2022-07-22 09:47:36,386 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 92 states, 92 states have (on average 3.1956521739130435) internal successors, (294), 92 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:38,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:38,444 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2022-07-22 09:47:38,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-22 09:47:38,445 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.1956521739130435) internal successors, (294), 92 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-07-22 09:47:38,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:38,445 INFO L225 Difference]: With dead ends: 188 [2022-07-22 09:47:38,445 INFO L226 Difference]: Without dead ends: 120 [2022-07-22 09:47:38,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3531 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1850, Invalid=17890, Unknown=0, NotChecked=0, Total=19740 [2022-07-22 09:47:38,446 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 62 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:38,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1014 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 935 Invalid, 0 Unknown, 150 Unchecked, 0.3s Time] [2022-07-22 09:47:38,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-22 09:47:38,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-07-22 09:47:38,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 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) [2022-07-22 09:47:38,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2022-07-22 09:47:38,481 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2022-07-22 09:47:38,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:38,481 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2022-07-22 09:47:38,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.1956521739130435) internal successors, (294), 92 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:38,481 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2022-07-22 09:47:38,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-22 09:47:38,482 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:38,482 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:38,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-07-22 09:47:38,683 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 [2022-07-22 09:47:38,683 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:38,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:38,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1441114926, now seen corresponding path program 37 times [2022-07-22 09:47:38,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:38,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614407955] [2022-07-22 09:47:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:38,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:39,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:39,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614407955] [2022-07-22 09:47:39,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614407955] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:39,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066004280] [2022-07-22 09:47:39,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:47:39,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:39,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:39,321 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) [2022-07-22 09:47:39,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-22 09:47:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:39,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-22 09:47:39,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:39,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:39,649 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:47:39,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 [2022-07-22 09:47:40,300 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:40,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:40,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:40,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:47:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:40,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066004280] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:40,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:40,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 38] total 56 [2022-07-22 09:47:40,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556764764] [2022-07-22 09:47:40,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:40,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-22 09:47:40,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:40,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-22 09:47:40,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2901, Unknown=0, NotChecked=0, Total=3080 [2022-07-22 09:47:40,611 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 56 states, 56 states have (on average 3.375) internal successors, (189), 56 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:42,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:42,719 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2022-07-22 09:47:42,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-22 09:47:42,719 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.375) internal successors, (189), 56 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-07-22 09:47:42,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:42,720 INFO L225 Difference]: With dead ends: 210 [2022-07-22 09:47:42,720 INFO L226 Difference]: Without dead ends: 208 [2022-07-22 09:47:42,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 213 SyntacticMatches, 7 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2527 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=508, Invalid=10834, Unknown=0, NotChecked=0, Total=11342 [2022-07-22 09:47:42,721 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 185 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 3377 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1532 SdHoareTripleChecker+Invalid, 3630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 3377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:42,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 1532 Invalid, 3630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 3377 Invalid, 0 Unknown, 40 Unchecked, 1.1s Time] [2022-07-22 09:47:42,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-22 09:47:42,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 128. [2022-07-22 09:47:42,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:42,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2022-07-22 09:47:42,772 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 119 [2022-07-22 09:47:42,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:42,773 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2022-07-22 09:47:42,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.375) internal successors, (189), 56 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:42,773 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2022-07-22 09:47:42,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-22 09:47:42,774 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:42,774 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:42,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-07-22 09:47:42,981 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 [2022-07-22 09:47:42,981 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:42,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:42,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2105822173, now seen corresponding path program 38 times [2022-07-22 09:47:42,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:42,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248426960] [2022-07-22 09:47:42,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:42,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:43,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:43,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248426960] [2022-07-22 09:47:43,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248426960] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:43,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7884664] [2022-07-22 09:47:43,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:47:43,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:43,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:43,783 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) [2022-07-22 09:47:43,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-22 09:47:43,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:47:43,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:43,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-22 09:47:43,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:44,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:44,094 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:47:44,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:47:44,200 INFO L356 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2022-07-22 09:47:44,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2022-07-22 09:47:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 2 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:45,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:45,912 WARN L833 $PredicateComparison]: unable to prove that (and (< 13 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_1488| Int)) (or (= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_1488| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (+ 60 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1488|))))) is different from false [2022-07-22 09:47:45,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 21 [2022-07-22 09:47:45,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 45 [2022-07-22 09:47:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 910 refuted. 0 times theorem prover too weak. 0 trivial. 17 not checked. [2022-07-22 09:47:46,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7884664] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:46,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:46,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 63 [2022-07-22 09:47:46,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148110356] [2022-07-22 09:47:46,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:46,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-22 09:47:46,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:46,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-22 09:47:46,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=3547, Unknown=1, NotChecked=120, Total=3906 [2022-07-22 09:47:46,039 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 63 states, 63 states have (on average 3.2063492063492065) internal successors, (202), 63 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:47,231 WARN L833 $PredicateComparison]: unable to prove that (and (< 13 |c_ULTIMATE.start_main_~i~0#1|) (<= 15 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 15) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_1488| Int)) (or (= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_1488| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (+ 60 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1488|))))) is different from false [2022-07-22 09:47:47,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:47,367 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2022-07-22 09:47:47,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-22 09:47:47,367 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.2063492063492065) internal successors, (202), 63 states have internal predecessors, (202), 0 states have call successors, (0), 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 122 [2022-07-22 09:47:47,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:47,368 INFO L225 Difference]: With dead ends: 195 [2022-07-22 09:47:47,368 INFO L226 Difference]: Without dead ends: 193 [2022-07-22 09:47:47,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 215 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=300, Invalid=5558, Unknown=2, NotChecked=302, Total=6162 [2022-07-22 09:47:47,369 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 97 mSDsluCounter, 1294 mSDsCounter, 0 mSdLazyCounter, 2020 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:47,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 1333 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2020 Invalid, 0 Unknown, 212 Unchecked, 0.7s Time] [2022-07-22 09:47:47,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-22 09:47:47,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 124. [2022-07-22 09:47:47,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2022-07-22 09:47:47,423 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 122 [2022-07-22 09:47:47,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:47,423 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2022-07-22 09:47:47,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.2063492063492065) internal successors, (202), 63 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:47,424 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2022-07-22 09:47:47,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-22 09:47:47,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:47,424 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:47,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:47,644 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 [2022-07-22 09:47:47,644 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:47,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:47,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1052587704, now seen corresponding path program 39 times [2022-07-22 09:47:47,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:47,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597195054] [2022-07-22 09:47:47,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:47,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:48,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:48,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597195054] [2022-07-22 09:47:48,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597195054] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:48,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779910477] [2022-07-22 09:47:48,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:47:48,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:48,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:48,355 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) [2022-07-22 09:47:48,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-22 09:47:49,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-07-22 09:47:49,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:49,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-22 09:47:49,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:49,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:51,061 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:47:51,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 [2022-07-22 09:47:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 496 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:51,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:52,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:52,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 28 [2022-07-22 09:47:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 480 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:52,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779910477] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:52,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:52,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 97 [2022-07-22 09:47:52,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454244515] [2022-07-22 09:47:52,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:52,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-22 09:47:52,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:52,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-22 09:47:52,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1031, Invalid=8281, Unknown=0, NotChecked=0, Total=9312 [2022-07-22 09:47:52,843 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 97 states, 97 states have (on average 3.216494845360825) internal successors, (312), 97 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:55,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:55,781 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2022-07-22 09:47:55,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-22 09:47:55,781 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.216494845360825) internal successors, (312), 97 states have internal predecessors, (312), 0 states have call successors, (0), 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 123 [2022-07-22 09:47:55,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:55,782 INFO L225 Difference]: With dead ends: 199 [2022-07-22 09:47:55,782 INFO L226 Difference]: Without dead ends: 127 [2022-07-22 09:47:55,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5117 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2496, Invalid=24894, Unknown=0, NotChecked=0, Total=27390 [2022-07-22 09:47:55,784 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 102 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 490 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:55,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 989 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1125 Invalid, 0 Unknown, 490 Unchecked, 0.4s Time] [2022-07-22 09:47:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-22 09:47:55,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-07-22 09:47:55,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 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) [2022-07-22 09:47:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-07-22 09:47:55,821 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 123 [2022-07-22 09:47:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:55,821 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-07-22 09:47:55,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.216494845360825) internal successors, (312), 97 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-07-22 09:47:55,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-22 09:47:55,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:55,822 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:55,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:56,022 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 [2022-07-22 09:47:56,023 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:56,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:56,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1366573779, now seen corresponding path program 40 times [2022-07-22 09:47:56,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:56,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904372256] [2022-07-22 09:47:56,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:56,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:56,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:56,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904372256] [2022-07-22 09:47:56,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904372256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:56,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321029909] [2022-07-22 09:47:56,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:47:56,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:56,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:56,836 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) [2022-07-22 09:47:56,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-22 09:47:56,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:47:56,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:56,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-22 09:47:56,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:57,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:57,152 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:47:57,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 [2022-07-22 09:47:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:57,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:58,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:47:58,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:47:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:58,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321029909] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:58,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:58,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 40] total 59 [2022-07-22 09:47:58,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443142927] [2022-07-22 09:47:58,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:58,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-22 09:47:58,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:58,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-22 09:47:58,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3233, Unknown=0, NotChecked=0, Total=3422 [2022-07-22 09:47:58,187 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 59 states, 59 states have (on average 3.389830508474576) internal successors, (200), 59 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:00,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:00,516 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2022-07-22 09:48:00,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-22 09:48:00,516 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.389830508474576) internal successors, (200), 59 states have internal predecessors, (200), 0 states have call successors, (0), 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 126 [2022-07-22 09:48:00,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:00,517 INFO L225 Difference]: With dead ends: 216 [2022-07-22 09:48:00,517 INFO L226 Difference]: Without dead ends: 214 [2022-07-22 09:48:00,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 226 SyntacticMatches, 7 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2818 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=510, Invalid=12146, Unknown=0, NotChecked=0, Total=12656 [2022-07-22 09:48:00,518 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 186 mSDsluCounter, 1718 mSDsCounter, 0 mSdLazyCounter, 3992 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1762 SdHoareTripleChecker+Invalid, 4314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 3992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:00,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 1762 Invalid, 4314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 3992 Invalid, 0 Unknown, 96 Unchecked, 1.3s Time] [2022-07-22 09:48:00,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-22 09:48:00,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 135. [2022-07-22 09:48:00,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:00,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2022-07-22 09:48:00,561 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 126 [2022-07-22 09:48:00,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:00,561 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2022-07-22 09:48:00,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.389830508474576) internal successors, (200), 59 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:00,562 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2022-07-22 09:48:00,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-22 09:48:00,562 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:00,563 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:00,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-07-22 09:48:00,767 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 [2022-07-22 09:48:00,768 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:00,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:00,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1055086952, now seen corresponding path program 41 times [2022-07-22 09:48:00,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:00,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536738137] [2022-07-22 09:48:00,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:00,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:01,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:01,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536738137] [2022-07-22 09:48:01,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536738137] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:01,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324909971] [2022-07-22 09:48:01,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:48:01,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:01,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:01,593 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) [2022-07-22 09:48:01,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-22 09:48:01,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-07-22 09:48:01,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:01,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-22 09:48:01,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:02,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:48:02,114 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:48:02,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:48:02,158 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:48:02,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:48:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 2 proven. 1042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:02,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:03,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:48:03,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:48:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 1043 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:48:03,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324909971] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:03,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:03,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 41] total 60 [2022-07-22 09:48:03,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098160313] [2022-07-22 09:48:03,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:03,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-22 09:48:03,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:03,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-22 09:48:03,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3345, Unknown=0, NotChecked=0, Total=3540 [2022-07-22 09:48:03,220 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 60 states, 60 states have (on average 3.4166666666666665) internal successors, (205), 60 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) [2022-07-22 09:48:05,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:05,264 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2022-07-22 09:48:05,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-22 09:48:05,264 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.4166666666666665) internal successors, (205), 60 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 129 [2022-07-22 09:48:05,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:05,265 INFO L225 Difference]: With dead ends: 211 [2022-07-22 09:48:05,265 INFO L226 Difference]: Without dead ends: 209 [2022-07-22 09:48:05,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 231 SyntacticMatches, 9 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=446, Invalid=9256, Unknown=0, NotChecked=0, Total=9702 [2022-07-22 09:48:05,266 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 145 mSDsluCounter, 1531 mSDsCounter, 0 mSdLazyCounter, 3906 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 4070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 3906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:05,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1576 Invalid, 4070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 3906 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 09:48:05,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-22 09:48:05,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 131. [2022-07-22 09:48:05,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 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) [2022-07-22 09:48:05,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2022-07-22 09:48:05,322 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 129 [2022-07-22 09:48:05,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:05,322 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2022-07-22 09:48:05,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.4166666666666665) internal successors, (205), 60 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) [2022-07-22 09:48:05,322 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2022-07-22 09:48:05,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-22 09:48:05,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:05,323 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:05,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:05,531 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 [2022-07-22 09:48:05,531 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:05,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash 772001481, now seen corresponding path program 42 times [2022-07-22 09:48:05,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:05,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145574786] [2022-07-22 09:48:05,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:05,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:06,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:06,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145574786] [2022-07-22 09:48:06,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145574786] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:06,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803444762] [2022-07-22 09:48:06,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:48:06,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:06,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:06,309 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) [2022-07-22 09:48:06,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-22 09:48:07,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-07-22 09:48:07,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:07,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-22 09:48:07,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:08,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:48:09,643 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:48:09,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 [2022-07-22 09:48:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 561 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:09,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:11,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:48:11,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 28 [2022-07-22 09:48:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 544 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:11,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803444762] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:11,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:11,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 102 [2022-07-22 09:48:11,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383452057] [2022-07-22 09:48:11,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:11,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-07-22 09:48:11,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:11,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-07-22 09:48:11,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=9168, Unknown=0, NotChecked=0, Total=10302 [2022-07-22 09:48:11,591 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 102 states, 102 states have (on average 3.235294117647059) internal successors, (330), 102 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:14,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:14,820 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2022-07-22 09:48:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-22 09:48:14,821 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.235294117647059) internal successors, (330), 102 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2022-07-22 09:48:14,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:14,821 INFO L225 Difference]: With dead ends: 210 [2022-07-22 09:48:14,821 INFO L226 Difference]: Without dead ends: 134 [2022-07-22 09:48:14,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5601 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2696, Invalid=27406, Unknown=0, NotChecked=0, Total=30102 [2022-07-22 09:48:14,823 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 116 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:14,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 996 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1155 Invalid, 0 Unknown, 469 Unchecked, 0.4s Time] [2022-07-22 09:48:14,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-22 09:48:14,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-07-22 09:48:14,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 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) [2022-07-22 09:48:14,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2022-07-22 09:48:14,874 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 130 [2022-07-22 09:48:14,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:14,874 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2022-07-22 09:48:14,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.235294117647059) internal successors, (330), 102 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:14,874 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2022-07-22 09:48:14,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-22 09:48:14,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:14,875 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:14,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:15,075 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 [2022-07-22 09:48:15,076 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:15,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:15,076 INFO L85 PathProgramCache]: Analyzing trace with hash 170627806, now seen corresponding path program 43 times [2022-07-22 09:48:15,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:15,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640375116] [2022-07-22 09:48:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:15,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:15,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:15,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640375116] [2022-07-22 09:48:15,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640375116] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:15,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810762722] [2022-07-22 09:48:15,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:48:15,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:15,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:15,868 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) [2022-07-22 09:48:15,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-22 09:48:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:16,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-22 09:48:16,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:16,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:48:16,186 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:48:16,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 [2022-07-22 09:48:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:17,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:17,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:48:17,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:48:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:17,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810762722] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:17,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:17,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 42] total 62 [2022-07-22 09:48:17,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768593900] [2022-07-22 09:48:17,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:17,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-22 09:48:17,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:17,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-22 09:48:17,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3583, Unknown=0, NotChecked=0, Total=3782 [2022-07-22 09:48:17,372 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 62 states, 62 states have (on average 3.403225806451613) internal successors, (211), 62 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:19,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:19,430 INFO L93 Difference]: Finished difference Result 213 states and 215 transitions. [2022-07-22 09:48:19,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-22 09:48:19,430 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.403225806451613) internal successors, (211), 62 states have internal predecessors, (211), 0 states have call successors, (0), 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 133 [2022-07-22 09:48:19,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:19,431 INFO L225 Difference]: With dead ends: 213 [2022-07-22 09:48:19,431 INFO L226 Difference]: Without dead ends: 211 [2022-07-22 09:48:19,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 256 SyntacticMatches, 7 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=441, Invalid=9861, Unknown=0, NotChecked=0, Total=10302 [2022-07-22 09:48:19,432 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 130 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 3656 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1746 SdHoareTripleChecker+Invalid, 3845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:19,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 1746 Invalid, 3845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 3656 Invalid, 0 Unknown, 106 Unchecked, 1.2s Time] [2022-07-22 09:48:19,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-22 09:48:19,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 142. [2022-07-22 09:48:19,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:19,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2022-07-22 09:48:19,491 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 133 [2022-07-22 09:48:19,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:19,492 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2022-07-22 09:48:19,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.403225806451613) internal successors, (211), 62 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:19,492 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2022-07-22 09:48:19,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-22 09:48:19,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:19,493 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:19,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-07-22 09:48:19,710 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 [2022-07-22 09:48:19,710 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:19,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:19,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1043932503, now seen corresponding path program 44 times [2022-07-22 09:48:19,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:19,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378801860] [2022-07-22 09:48:19,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:19,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 0 proven. 1168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:20,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:20,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378801860] [2022-07-22 09:48:20,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378801860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:20,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530439808] [2022-07-22 09:48:20,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:48:20,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:20,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:20,514 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) [2022-07-22 09:48:20,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-22 09:48:20,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:48:20,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:20,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-22 09:48:20,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:20,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:48:20,842 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:48:20,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:48:20,887 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:48:20,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:48:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 2 proven. 1166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:21,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:21,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:48:21,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:48:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 0 proven. 1167 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:48:22,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530439808] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:22,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:22,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 43] total 63 [2022-07-22 09:48:22,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457320594] [2022-07-22 09:48:22,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:22,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-22 09:48:22,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:22,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-22 09:48:22,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=3701, Unknown=0, NotChecked=0, Total=3906 [2022-07-22 09:48:22,060 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 63 states, 63 states have (on average 3.4285714285714284) internal successors, (216), 63 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:24,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:24,338 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2022-07-22 09:48:24,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-22 09:48:24,339 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.4285714285714284) internal successors, (216), 63 states have internal predecessors, (216), 0 states have call successors, (0), 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 136 [2022-07-22 09:48:24,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:24,340 INFO L225 Difference]: With dead ends: 222 [2022-07-22 09:48:24,340 INFO L226 Difference]: Without dead ends: 220 [2022-07-22 09:48:24,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 244 SyntacticMatches, 9 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2150 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=468, Invalid=10244, Unknown=0, NotChecked=0, Total=10712 [2022-07-22 09:48:24,341 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 118 mSDsluCounter, 1766 mSDsCounter, 0 mSdLazyCounter, 4389 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1813 SdHoareTripleChecker+Invalid, 4535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 4389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:24,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1813 Invalid, 4535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 4389 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 09:48:24,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-22 09:48:24,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 138. [2022-07-22 09:48:24,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 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) [2022-07-22 09:48:24,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2022-07-22 09:48:24,391 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 136 [2022-07-22 09:48:24,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:24,391 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2022-07-22 09:48:24,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.4285714285714284) internal successors, (216), 63 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:24,391 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2022-07-22 09:48:24,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-22 09:48:24,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:24,392 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:24,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:24,592 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 [2022-07-22 09:48:24,593 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:24,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:24,593 INFO L85 PathProgramCache]: Analyzing trace with hash 456008020, now seen corresponding path program 45 times [2022-07-22 09:48:24,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:24,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189107023] [2022-07-22 09:48:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:24,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:25,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:25,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189107023] [2022-07-22 09:48:25,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189107023] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:25,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040515972] [2022-07-22 09:48:25,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:48:25,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:25,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:25,396 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) [2022-07-22 09:48:25,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-22 09:48:27,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-07-22 09:48:27,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:27,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-22 09:48:27,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:27,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:48:29,659 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:48:29,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 [2022-07-22 09:48:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 630 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:29,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:32,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:48:32,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 28 [2022-07-22 09:48:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 612 proven. 568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:32,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040515972] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:32,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:32,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 107 [2022-07-22 09:48:32,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250560176] [2022-07-22 09:48:32,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:32,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-07-22 09:48:32,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:32,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-07-22 09:48:32,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=10098, Unknown=2, NotChecked=0, Total=11342 [2022-07-22 09:48:32,189 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 107 states, 107 states have (on average 3.2523364485981308) internal successors, (348), 107 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:35,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:35,753 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2022-07-22 09:48:35,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-22 09:48:35,753 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.2523364485981308) internal successors, (348), 107 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2022-07-22 09:48:35,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:35,754 INFO L225 Difference]: With dead ends: 221 [2022-07-22 09:48:35,754 INFO L226 Difference]: Without dead ends: 141 [2022-07-22 09:48:35,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6185 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=2948, Invalid=30356, Unknown=2, NotChecked=0, Total=33306 [2022-07-22 09:48:35,756 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 78 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 454 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:35,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1161 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1172 Invalid, 0 Unknown, 454 Unchecked, 0.4s Time] [2022-07-22 09:48:35,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-22 09:48:35,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-07-22 09:48:35,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 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) [2022-07-22 09:48:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2022-07-22 09:48:35,810 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 137 [2022-07-22 09:48:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:35,810 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2022-07-22 09:48:35,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.2523364485981308) internal successors, (348), 107 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2022-07-22 09:48:35,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-22 09:48:35,810 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:35,810 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:35,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-07-22 09:48:36,011 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 [2022-07-22 09:48:36,011 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:36,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:36,012 INFO L85 PathProgramCache]: Analyzing trace with hash -2131063905, now seen corresponding path program 46 times [2022-07-22 09:48:36,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:36,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956984408] [2022-07-22 09:48:36,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:36,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:36,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:36,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956984408] [2022-07-22 09:48:36,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956984408] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:36,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197289277] [2022-07-22 09:48:36,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:48:36,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:36,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:36,828 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) [2022-07-22 09:48:36,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-22 09:48:37,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:48:37,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:37,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-22 09:48:37,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:37,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:48:37,185 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:48:37,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 [2022-07-22 09:48:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:38,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:38,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:48:38,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:48:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:38,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197289277] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:38,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:38,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 44] total 65 [2022-07-22 09:48:38,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594616884] [2022-07-22 09:48:38,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:38,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-22 09:48:38,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:38,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-22 09:48:38,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=3951, Unknown=0, NotChecked=0, Total=4160 [2022-07-22 09:48:38,402 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 65 states, 65 states have (on average 3.4153846153846152) internal successors, (222), 65 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:41,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:41,251 INFO L93 Difference]: Finished difference Result 238 states and 240 transitions. [2022-07-22 09:48:41,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-07-22 09:48:41,252 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.4153846153846152) internal successors, (222), 65 states have internal predecessors, (222), 0 states have call successors, (0), 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 140 [2022-07-22 09:48:41,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:41,252 INFO L225 Difference]: With dead ends: 238 [2022-07-22 09:48:41,252 INFO L226 Difference]: Without dead ends: 236 [2022-07-22 09:48:41,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 252 SyntacticMatches, 7 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3450 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=564, Invalid=14936, Unknown=0, NotChecked=0, Total=15500 [2022-07-22 09:48:41,253 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 164 mSDsluCounter, 2120 mSDsCounter, 0 mSdLazyCounter, 4694 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 2168 SdHoareTripleChecker+Invalid, 5014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 4694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:41,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 2168 Invalid, 5014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 4694 Invalid, 0 Unknown, 106 Unchecked, 1.6s Time] [2022-07-22 09:48:41,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-22 09:48:41,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 149. [2022-07-22 09:48:41,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:41,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2022-07-22 09:48:41,319 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 140 [2022-07-22 09:48:41,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:41,320 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2022-07-22 09:48:41,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.4153846153846152) internal successors, (222), 65 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:41,320 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2022-07-22 09:48:41,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-22 09:48:41,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:41,321 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:41,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-07-22 09:48:41,526 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 [2022-07-22 09:48:41,526 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:41,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:41,526 INFO L85 PathProgramCache]: Analyzing trace with hash -402654860, now seen corresponding path program 47 times [2022-07-22 09:48:41,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:41,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104820687] [2022-07-22 09:48:41,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:41,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:42,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 1299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:42,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:42,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104820687] [2022-07-22 09:48:42,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104820687] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:42,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133699574] [2022-07-22 09:48:42,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:48:42,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:42,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:42,392 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) [2022-07-22 09:48:42,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-22 09:48:43,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-07-22 09:48:43,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:43,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-22 09:48:43,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:43,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:48:43,206 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:48:43,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:48:43,252 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:48:43,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:48:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 2 proven. 1297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:44,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:44,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:48:44,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:48:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 1298 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:48:44,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133699574] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:44,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:44,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 45] total 66 [2022-07-22 09:48:44,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689069127] [2022-07-22 09:48:44,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:44,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-22 09:48:44,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:44,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-22 09:48:44,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=4075, Unknown=0, NotChecked=0, Total=4290 [2022-07-22 09:48:44,543 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 66 states, 66 states have (on average 3.4393939393939394) internal successors, (227), 66 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:47,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:47,218 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2022-07-22 09:48:47,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-22 09:48:47,219 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.4393939393939394) internal successors, (227), 66 states have internal predecessors, (227), 0 states have call successors, (0), 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 143 [2022-07-22 09:48:47,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:47,219 INFO L225 Difference]: With dead ends: 233 [2022-07-22 09:48:47,219 INFO L226 Difference]: Without dead ends: 231 [2022-07-22 09:48:47,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 257 SyntacticMatches, 9 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=490, Invalid=11282, Unknown=0, NotChecked=0, Total=11772 [2022-07-22 09:48:47,223 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 123 mSDsluCounter, 1984 mSDsCounter, 0 mSdLazyCounter, 5113 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 2033 SdHoareTripleChecker+Invalid, 5266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 5113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:47,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 2033 Invalid, 5266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 5113 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 09:48:47,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-22 09:48:47,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 145. [2022-07-22 09:48:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-07-22 09:48:47,323 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 143 [2022-07-22 09:48:47,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:47,323 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-07-22 09:48:47,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.4393939393939394) internal successors, (227), 66 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:47,324 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-07-22 09:48:47,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-22 09:48:47,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:47,325 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:47,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-07-22 09:48:47,532 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 [2022-07-22 09:48:47,533 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:47,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:47,533 INFO L85 PathProgramCache]: Analyzing trace with hash 744542613, now seen corresponding path program 48 times [2022-07-22 09:48:47,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:47,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604860668] [2022-07-22 09:48:47,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:47,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:48,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:48,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604860668] [2022-07-22 09:48:48,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604860668] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:48,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508692457] [2022-07-22 09:48:48,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:48:48,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:48,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:48,510 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) [2022-07-22 09:48:48,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-22 09:48:50,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-07-22 09:48:50,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:50,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-22 09:48:50,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:51,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:48:53,176 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:48:53,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 [2022-07-22 09:48:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 703 proven. 609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:53,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:55,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:48:55,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 28 [2022-07-22 09:48:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 684 proven. 628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:55,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508692457] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:55,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:55,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 46] total 112 [2022-07-22 09:48:55,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731174581] [2022-07-22 09:48:55,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:55,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-07-22 09:48:55,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:55,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-07-22 09:48:55,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=11076, Unknown=1, NotChecked=0, Total=12432 [2022-07-22 09:48:55,638 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 112 states, 112 states have (on average 3.267857142857143) internal successors, (366), 112 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:58,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:58,722 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2022-07-22 09:48:58,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-22 09:48:58,723 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 3.267857142857143) internal successors, (366), 112 states have internal predecessors, (366), 0 states have call successors, (0), 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 144 [2022-07-22 09:48:58,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:58,723 INFO L225 Difference]: With dead ends: 232 [2022-07-22 09:48:58,723 INFO L226 Difference]: Without dead ends: 148 [2022-07-22 09:48:58,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5241 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2660, Invalid=27095, Unknown=1, NotChecked=0, Total=29756 [2022-07-22 09:48:58,725 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 131 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:58,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 1206 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1412 Invalid, 0 Unknown, 248 Unchecked, 0.5s Time] [2022-07-22 09:48:58,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-22 09:48:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-07-22 09:48:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 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) [2022-07-22 09:48:58,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2022-07-22 09:48:58,791 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 144 [2022-07-22 09:48:58,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:58,791 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2022-07-22 09:48:58,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 3.267857142857143) internal successors, (366), 112 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:58,791 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2022-07-22 09:48:58,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-22 09:48:58,791 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:58,792 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:58,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-07-22 09:48:58,992 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 [2022-07-22 09:48:58,992 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:58,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:58,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1801368342, now seen corresponding path program 49 times [2022-07-22 09:48:58,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:58,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376989913] [2022-07-22 09:48:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:58,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:00,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:00,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376989913] [2022-07-22 09:49:00,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376989913] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:49:00,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667989313] [2022-07-22 09:49:00,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:49:00,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:00,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:00,037 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) [2022-07-22 09:49:00,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-22 09:49:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:00,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-22 09:49:00,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:00,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:49:00,399 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:49:00,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 [2022-07-22 09:49:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:01,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:49:01,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:49:01,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:49:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:01,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667989313] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:49:01,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:49:01,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 46] total 68 [2022-07-22 09:49:01,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587127662] [2022-07-22 09:49:01,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:49:01,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-22 09:49:01,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:01,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-22 09:49:01,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=4337, Unknown=0, NotChecked=0, Total=4556 [2022-07-22 09:49:01,736 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 68 states, 68 states have (on average 3.426470588235294) internal successors, (233), 68 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:04,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:04,804 INFO L93 Difference]: Finished difference Result 249 states and 251 transitions. [2022-07-22 09:49:04,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-07-22 09:49:04,804 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.426470588235294) internal successors, (233), 68 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2022-07-22 09:49:04,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:04,805 INFO L225 Difference]: With dead ends: 249 [2022-07-22 09:49:04,805 INFO L226 Difference]: Without dead ends: 247 [2022-07-22 09:49:04,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 265 SyntacticMatches, 7 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3790 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=591, Invalid=16439, Unknown=0, NotChecked=0, Total=17030 [2022-07-22 09:49:04,806 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 184 mSDsluCounter, 2156 mSDsCounter, 0 mSdLazyCounter, 5082 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 2206 SdHoareTripleChecker+Invalid, 5313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 5082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:04,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 2206 Invalid, 5313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 5082 Invalid, 0 Unknown, 5 Unchecked, 1.7s Time] [2022-07-22 09:49:04,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-22 09:49:04,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 156. [2022-07-22 09:49:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:04,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2022-07-22 09:49:04,885 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 147 [2022-07-22 09:49:04,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:04,885 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2022-07-22 09:49:04,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.426470588235294) internal successors, (233), 68 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:04,885 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2022-07-22 09:49:04,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-22 09:49:04,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:04,886 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:04,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-07-22 09:49:05,093 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 [2022-07-22 09:49:05,093 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:05,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:05,093 INFO L85 PathProgramCache]: Analyzing trace with hash 2087818613, now seen corresponding path program 50 times [2022-07-22 09:49:05,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:05,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118624982] [2022-07-22 09:49:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:05,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 0 proven. 1437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:06,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:06,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118624982] [2022-07-22 09:49:06,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118624982] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:49:06,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715373614] [2022-07-22 09:49:06,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:49:06,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:06,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:06,063 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) [2022-07-22 09:49:06,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-22 09:49:06,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:49:06,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:49:06,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-22 09:49:06,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:06,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:49:06,448 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:49:06,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:49:06,562 INFO L356 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2022-07-22 09:49:06,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2022-07-22 09:49:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 2 proven. 1435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:08,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:49:08,824 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_2388| Int)) (or (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_2388| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (+ 76 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_2388|)))) (< 17 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2022-07-22 09:49:08,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 21 [2022-07-22 09:49:08,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 45 [2022-07-22 09:49:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 0 proven. 1416 refuted. 0 times theorem prover too weak. 0 trivial. 21 not checked. [2022-07-22 09:49:08,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715373614] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:49:08,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:49:08,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 48] total 75 [2022-07-22 09:49:08,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400305391] [2022-07-22 09:49:08,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:49:08,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-22 09:49:08,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:08,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-22 09:49:08,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=5123, Unknown=1, NotChecked=144, Total=5550 [2022-07-22 09:49:08,973 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand has 75 states, 75 states have (on average 3.28) internal successors, (246), 75 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:10,431 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_2388| Int)) (or (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_2388| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (+ 76 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_2388|)))) (<= |c_ULTIMATE.start_main_~i~0#1| 19) (<= 19 |c_ULTIMATE.start_main_~i~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 0) (< 17 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2022-07-22 09:49:10,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:10,619 INFO L93 Difference]: Finished difference Result 239 states and 241 transitions. [2022-07-22 09:49:10,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-22 09:49:10,620 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.28) internal successors, (246), 75 states have internal predecessors, (246), 0 states have call successors, (0), 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 150 [2022-07-22 09:49:10,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:10,620 INFO L225 Difference]: With dead ends: 239 [2022-07-22 09:49:10,621 INFO L226 Difference]: Without dead ends: 237 [2022-07-22 09:49:10,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 267 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=360, Invalid=8202, Unknown=2, NotChecked=366, Total=8930 [2022-07-22 09:49:10,621 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 121 mSDsluCounter, 1941 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:10,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 1988 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2472 Invalid, 0 Unknown, 432 Unchecked, 0.8s Time] [2022-07-22 09:49:10,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-22 09:49:10,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 152. [2022-07-22 09:49:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:10,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2022-07-22 09:49:10,725 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 150 [2022-07-22 09:49:10,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:10,725 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2022-07-22 09:49:10,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.28) internal successors, (246), 75 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:10,725 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2022-07-22 09:49:10,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-22 09:49:10,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:10,726 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:10,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-07-22 09:49:10,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:10,947 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:10,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:10,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1595935392, now seen corresponding path program 51 times [2022-07-22 09:49:10,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:10,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834584955] [2022-07-22 09:49:10,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:10,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:11,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:11,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834584955] [2022-07-22 09:49:11,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834584955] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:49:11,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927699738] [2022-07-22 09:49:11,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:49:11,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:11,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:11,871 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:49:11,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-22 09:49:14,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-07-22 09:49:14,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:49:14,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-22 09:49:14,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:15,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:49:17,409 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:49:17,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 [2022-07-22 09:49:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 780 proven. 671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:17,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:49:19,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:49:19,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 28 [2022-07-22 09:49:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 760 proven. 691 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:19,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927699738] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:49:19,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:49:19,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 48] total 117 [2022-07-22 09:49:19,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423563780] [2022-07-22 09:49:19,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:49:19,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-07-22 09:49:19,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:19,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-07-22 09:49:19,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1473, Invalid=12099, Unknown=0, NotChecked=0, Total=13572 [2022-07-22 09:49:19,896 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 117 states, 117 states have (on average 3.282051282051282) internal successors, (384), 117 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:23,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:23,343 INFO L93 Difference]: Finished difference Result 243 states and 245 transitions. [2022-07-22 09:49:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-22 09:49:23,343 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 3.282051282051282) internal successors, (384), 117 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-07-22 09:49:23,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:23,344 INFO L225 Difference]: With dead ends: 243 [2022-07-22 09:49:23,344 INFO L226 Difference]: Without dead ends: 155 [2022-07-22 09:49:23,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 272 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5721 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2885, Invalid=29695, Unknown=0, NotChecked=0, Total=32580 [2022-07-22 09:49:23,346 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 117 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:23,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1627 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1617 Invalid, 0 Unknown, 335 Unchecked, 0.5s Time] [2022-07-22 09:49:23,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-22 09:49:23,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-07-22 09:49:23,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 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) [2022-07-22 09:49:23,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2022-07-22 09:49:23,429 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 151 [2022-07-22 09:49:23,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:23,429 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2022-07-22 09:49:23,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 3.282051282051282) internal successors, (384), 117 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:23,430 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2022-07-22 09:49:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-07-22 09:49:23,431 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:23,431 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:23,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-07-22 09:49:23,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:23,649 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:23,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:23,650 INFO L85 PathProgramCache]: Analyzing trace with hash 519241835, now seen corresponding path program 52 times [2022-07-22 09:49:23,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:23,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809853610] [2022-07-22 09:49:23,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:23,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:24,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:24,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809853610] [2022-07-22 09:49:24,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809853610] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:49:24,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678602017] [2022-07-22 09:49:24,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:49:24,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:24,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:24,604 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:49:24,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-22 09:49:24,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:49:24,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:49:24,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-22 09:49:24,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:24,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:49:24,991 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:49:24,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 [2022-07-22 09:49:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:26,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:49:26,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:49:26,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:49:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:26,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678602017] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:49:26,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:49:26,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 48] total 71 [2022-07-22 09:49:26,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032698117] [2022-07-22 09:49:26,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:49:26,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-22 09:49:26,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:26,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-22 09:49:26,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=4741, Unknown=0, NotChecked=0, Total=4970 [2022-07-22 09:49:26,436 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 71 states, 71 states have (on average 3.436619718309859) internal successors, (244), 71 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:29,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:29,917 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2022-07-22 09:49:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-07-22 09:49:29,917 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.436619718309859) internal successors, (244), 71 states have internal predecessors, (244), 0 states have call successors, (0), 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 154 [2022-07-22 09:49:29,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:29,918 INFO L225 Difference]: With dead ends: 260 [2022-07-22 09:49:29,918 INFO L226 Difference]: Without dead ends: 258 [2022-07-22 09:49:29,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 278 SyntacticMatches, 7 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4146 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=618, Invalid=18014, Unknown=0, NotChecked=0, Total=18632 [2022-07-22 09:49:29,919 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 194 mSDsluCounter, 2387 mSDsCounter, 0 mSdLazyCounter, 5648 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 2439 SdHoareTripleChecker+Invalid, 5891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 5648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:29,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 2439 Invalid, 5891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 5648 Invalid, 0 Unknown, 5 Unchecked, 1.9s Time] [2022-07-22 09:49:29,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-22 09:49:29,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 163. [2022-07-22 09:49:29,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:29,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2022-07-22 09:49:29,995 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 154 [2022-07-22 09:49:29,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:29,995 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2022-07-22 09:49:29,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.436619718309859) internal successors, (244), 71 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:29,995 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2022-07-22 09:49:29,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 09:49:29,996 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:29,996 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:30,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-07-22 09:49:30,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-22 09:49:30,221 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:30,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:30,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1996155520, now seen corresponding path program 53 times [2022-07-22 09:49:30,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:30,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565187710] [2022-07-22 09:49:30,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:30,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1582 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:31,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:31,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565187710] [2022-07-22 09:49:31,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565187710] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:49:31,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617887493] [2022-07-22 09:49:31,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:49:31,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:31,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:31,289 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:49:31,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-22 09:49:33,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-07-22 09:49:33,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:49:33,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-22 09:49:33,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:34,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:49:34,068 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:49:34,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:49:34,117 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:49:34,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-07-22 09:49:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 2 proven. 1580 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:35,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:49:35,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:49:35,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-22 09:49:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1581 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:49:35,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617887493] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:49:35,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:49:35,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 49] total 72 [2022-07-22 09:49:35,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152822310] [2022-07-22 09:49:35,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:49:35,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-22 09:49:35,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:35,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-22 09:49:35,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=4877, Unknown=0, NotChecked=0, Total=5112 [2022-07-22 09:49:35,575 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 72 states, 72 states have (on average 3.4583333333333335) internal successors, (249), 72 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:38,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:38,708 INFO L93 Difference]: Finished difference Result 255 states and 257 transitions. [2022-07-22 09:49:38,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-22 09:49:38,708 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.4583333333333335) internal successors, (249), 72 states have internal predecessors, (249), 0 states have call successors, (0), 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 157 [2022-07-22 09:49:38,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:38,709 INFO L225 Difference]: With dead ends: 255 [2022-07-22 09:49:38,709 INFO L226 Difference]: Without dead ends: 253 [2022-07-22 09:49:38,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 283 SyntacticMatches, 9 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2783 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=534, Invalid=13508, Unknown=0, NotChecked=0, Total=14042 [2022-07-22 09:49:38,710 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 168 mSDsluCounter, 2492 mSDsCounter, 0 mSdLazyCounter, 6282 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 2545 SdHoareTripleChecker+Invalid, 6481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 6282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:38,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 2545 Invalid, 6481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 6282 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 09:49:38,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-07-22 09:49:38,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 159. [2022-07-22 09:49:38,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2022-07-22 09:49:38,793 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 157 [2022-07-22 09:49:38,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:38,794 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2022-07-22 09:49:38,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.4583333333333335) internal successors, (249), 72 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:38,794 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2022-07-22 09:49:38,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-22 09:49:38,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:38,794 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:38,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-07-22 09:49:38,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-22 09:49:38,995 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:38,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:38,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2084175969, now seen corresponding path program 54 times [2022-07-22 09:49:38,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:38,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809825067] [2022-07-22 09:49:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:38,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:39,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 0 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:39,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:39,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809825067] [2022-07-22 09:49:39,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809825067] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:49:39,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81219794] [2022-07-22 09:49:39,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:49:39,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:39,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:39,982 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:49:39,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-22 09:49:42,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-07-22 09:49:42,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:49:42,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-22 09:49:42,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:43,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 09:49:43,173 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:49:43,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26