./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/mbpr5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/mbpr5.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 5503daab190ef8b57bdc3b49ed300bfd661cba05f76774439c2c92cf1668f08b --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 09:33:12,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 09:33:12,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 09:33:12,836 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 09:33:12,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 09:33:12,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 09:33:12,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 09:33:12,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 09:33:12,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 09:33:12,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 09:33:12,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 09:33:12,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 09:33:12,846 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 09:33:12,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 09:33:12,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 09:33:12,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 09:33:12,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 09:33:12,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 09:33:12,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 09:33:12,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 09:33:12,858 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 09:33:12,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 09:33:12,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 09:33:12,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 09:33:12,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 09:33:12,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 09:33:12,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 09:33:12,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 09:33:12,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 09:33:12,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 09:33:12,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 09:33:12,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 09:33:12,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 09:33:12,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 09:33:12,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 09:33:12,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 09:33:12,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 09:33:12,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 09:33:12,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 09:33:12,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 09:33:12,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 09:33:12,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 09:33:12,874 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 09:33:12,903 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 09:33:12,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 09:33:12,904 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 09:33:12,904 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 09:33:12,905 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 09:33:12,905 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 09:33:12,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 09:33:12,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 09:33:12,905 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 09:33:12,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 09:33:12,906 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 09:33:12,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 09:33:12,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 09:33:12,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 09:33:12,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 09:33:12,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 09:33:12,907 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 09:33:12,907 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 09:33:12,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 09:33:12,909 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 09:33:12,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 09:33:12,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 09:33:12,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 09:33:12,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 09:33:12,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:33:12,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 09:33:12,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 09:33:12,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 09:33:12,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 09:33:12,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 09:33:12,910 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 09:33:12,910 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 09:33:12,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 09:33:12,911 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5503daab190ef8b57bdc3b49ed300bfd661cba05f76774439c2c92cf1668f08b [2022-07-19 09:33:13,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 09:33:13,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 09:33:13,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 09:33:13,084 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 09:33:13,085 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 09:33:13,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/mbpr5.c [2022-07-19 09:33:13,137 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84fbcf9ea/be67aae6833141d2904bf64e4fccb6e9/FLAGdbb0b0a45 [2022-07-19 09:33:13,527 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 09:33:13,528 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mbpr5.c [2022-07-19 09:33:13,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84fbcf9ea/be67aae6833141d2904bf64e4fccb6e9/FLAGdbb0b0a45 [2022-07-19 09:33:13,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84fbcf9ea/be67aae6833141d2904bf64e4fccb6e9 [2022-07-19 09:33:13,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 09:33:13,548 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 09:33:13,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 09:33:13,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 09:33:13,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 09:33:13,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:33:13" (1/1) ... [2022-07-19 09:33:13,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@515e0524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:13, skipping insertion in model container [2022-07-19 09:33:13,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:33:13" (1/1) ... [2022-07-19 09:33:13,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 09:33:13,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 09:33:13,680 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/mbpr5.c[396,409] [2022-07-19 09:33:13,706 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:33:13,711 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 09:33:13,718 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/mbpr5.c[396,409] [2022-07-19 09:33:13,741 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:33:13,748 INFO L208 MainTranslator]: Completed translation [2022-07-19 09:33:13,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:13 WrapperNode [2022-07-19 09:33:13,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 09:33:13,750 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 09:33:13,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 09:33:13,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 09:33:13,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:13" (1/1) ... [2022-07-19 09:33:13,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:13" (1/1) ... [2022-07-19 09:33:13,819 INFO L137 Inliner]: procedures = 15, calls = 64, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 173 [2022-07-19 09:33:13,825 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 09:33:13,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 09:33:13,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 09:33:13,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 09:33:13,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:13" (1/1) ... [2022-07-19 09:33:13,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:13" (1/1) ... [2022-07-19 09:33:13,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:13" (1/1) ... [2022-07-19 09:33:13,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:13" (1/1) ... [2022-07-19 09:33:13,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:13" (1/1) ... [2022-07-19 09:33:13,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:13" (1/1) ... [2022-07-19 09:33:13,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:13" (1/1) ... [2022-07-19 09:33:13,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 09:33:13,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 09:33:13,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 09:33:13,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 09:33:13,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:13" (1/1) ... [2022-07-19 09:33:13,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:33:13,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:33:13,895 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) [2022-07-19 09:33:13,896 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 [2022-07-19 09:33:13,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 09:33:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 09:33:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 09:33:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 09:33:13,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 09:33:13,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 09:33:13,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 09:33:13,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 09:33:14,002 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 09:33:14,003 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 09:33:14,244 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 09:33:14,248 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 09:33:14,248 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-19 09:33:14,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:33:14 BoogieIcfgContainer [2022-07-19 09:33:14,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 09:33:14,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 09:33:14,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 09:33:14,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 09:33:14,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:33:13" (1/3) ... [2022-07-19 09:33:14,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed189e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:33:14, skipping insertion in model container [2022-07-19 09:33:14,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:13" (2/3) ... [2022-07-19 09:33:14,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed189e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:33:14, skipping insertion in model container [2022-07-19 09:33:14,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:33:14" (3/3) ... [2022-07-19 09:33:14,255 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr5.c [2022-07-19 09:33:14,265 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 09:33:14,265 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 09:33:14,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 09:33:14,322 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@562e00b5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@274701e1 [2022-07-19 09:33:14,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 09:33:14,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 43 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:14,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 09:33:14,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:33:14,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:33:14,337 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:33:14,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:33:14,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1087925893, now seen corresponding path program 1 times [2022-07-19 09:33:14,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:33:14,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811072561] [2022-07-19 09:33:14,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:33:14,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:33:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:33:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:33:14,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:33:14,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811072561] [2022-07-19 09:33:14,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811072561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:33:14,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:33:14,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 09:33:14,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420872140] [2022-07-19 09:33:14,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:33:14,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 09:33:14,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:33:14,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 09:33:14,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 09:33:14,496 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 43 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:14,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:33:14,508 INFO L93 Difference]: Finished difference Result 83 states and 122 transitions. [2022-07-19 09:33:14,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 09:33:14,509 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-19 09:33:14,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:33:14,514 INFO L225 Difference]: With dead ends: 83 [2022-07-19 09:33:14,514 INFO L226 Difference]: Without dead ends: 39 [2022-07-19 09:33:14,516 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 [2022-07-19 09:33:14,518 INFO L413 NwaCegarLoop]: 57 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, 57 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 [2022-07-19 09:33:14,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:33:14,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-19 09:33:14,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-19 09:33:14,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2022-07-19 09:33:14,542 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 21 [2022-07-19 09:33:14,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:33:14,542 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2022-07-19 09:33:14,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:14,543 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2022-07-19 09:33:14,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 09:33:14,544 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:33:14,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:33:14,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 09:33:14,545 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:33:14,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:33:14,547 INFO L85 PathProgramCache]: Analyzing trace with hash -30028973, now seen corresponding path program 1 times [2022-07-19 09:33:14,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:33:14,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221038097] [2022-07-19 09:33:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:33:14,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:33:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:33:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:33:14,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:33:14,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221038097] [2022-07-19 09:33:14,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221038097] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:33:14,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:33:14,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 09:33:14,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092141231] [2022-07-19 09:33:14,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:33:14,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 09:33:14,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:33:14,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 09:33:14,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 09:33:14,658 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:14,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:33:14,684 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2022-07-19 09:33:14,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 09:33:14,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-19 09:33:14,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:33:14,685 INFO L225 Difference]: With dead ends: 48 [2022-07-19 09:33:14,685 INFO L226 Difference]: Without dead ends: 46 [2022-07-19 09:33:14,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 09:33:14,686 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 9 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:33:14,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 140 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:33:14,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-19 09:33:14,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2022-07-19 09:33:14,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.3) internal successors, (52), 40 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) [2022-07-19 09:33:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2022-07-19 09:33:14,690 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 21 [2022-07-19 09:33:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:33:14,691 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2022-07-19 09:33:14,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2022-07-19 09:33:14,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 09:33:14,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:33:14,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:33:14,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 09:33:14,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:33:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:33:14,692 INFO L85 PathProgramCache]: Analyzing trace with hash -29969391, now seen corresponding path program 1 times [2022-07-19 09:33:14,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:33:14,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944587632] [2022-07-19 09:33:14,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:33:14,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:33:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:33:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:33:14,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:33:14,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944587632] [2022-07-19 09:33:14,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944587632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:33:14,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:33:14,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 09:33:14,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184769992] [2022-07-19 09:33:14,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:33:14,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 09:33:14,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:33:14,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 09:33:14,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 09:33:14,795 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:14,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:33:14,887 INFO L93 Difference]: Finished difference Result 92 states and 122 transitions. [2022-07-19 09:33:14,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 09:33:14,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-19 09:33:14,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:33:14,888 INFO L225 Difference]: With dead ends: 92 [2022-07-19 09:33:14,889 INFO L226 Difference]: Without dead ends: 61 [2022-07-19 09:33:14,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 09:33:14,890 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:33:14,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 25 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:33:14,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-19 09:33:14,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2022-07-19 09:33:14,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-07-19 09:33:14,911 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 21 [2022-07-19 09:33:14,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:33:14,911 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-07-19 09:33:14,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:14,911 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-07-19 09:33:14,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 09:33:14,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:33:14,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:33:14,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 09:33:14,912 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:33:14,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:33:14,913 INFO L85 PathProgramCache]: Analyzing trace with hash -175217928, now seen corresponding path program 1 times [2022-07-19 09:33:14,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:33:14,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254594880] [2022-07-19 09:33:14,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:33:14,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:33:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:33:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 09:33:14,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:33:14,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254594880] [2022-07-19 09:33:14,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254594880] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:33:14,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:33:14,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 09:33:14,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050112684] [2022-07-19 09:33:14,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:33:14,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:33:14,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:33:14,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:33:14,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:33:14,988 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 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) [2022-07-19 09:33:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:33:15,008 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-07-19 09:33:15,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:33:15,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 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 41 [2022-07-19 09:33:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:33:15,009 INFO L225 Difference]: With dead ends: 61 [2022-07-19 09:33:15,010 INFO L226 Difference]: Without dead ends: 46 [2022-07-19 09:33:15,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:33:15,014 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 18 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:33:15,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 40 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:33:15,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-19 09:33:15,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-19 09:33:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-07-19 09:33:15,024 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 41 [2022-07-19 09:33:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:33:15,025 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-07-19 09:33:15,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 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) [2022-07-19 09:33:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-07-19 09:33:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 09:33:15,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:33:15,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:33:15,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 09:33:15,027 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:33:15,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:33:15,027 INFO L85 PathProgramCache]: Analyzing trace with hash -568244938, now seen corresponding path program 1 times [2022-07-19 09:33:15,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:33:15,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828111888] [2022-07-19 09:33:15,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:33:15,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:33:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:33:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:33:15,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:33:15,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828111888] [2022-07-19 09:33:15,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828111888] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:33:15,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974649708] [2022-07-19 09:33:15,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:33:15,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:33:15,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:33:15,420 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) [2022-07-19 09:33:15,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 09:33:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:33:15,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-19 09:33:15,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:33:15,574 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 16 treesize of output 12 [2022-07-19 09:33:15,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2022-07-19 09:33:15,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,674 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 29 treesize of output 28 [2022-07-19 09:33:15,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2022-07-19 09:33:15,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,752 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 29 treesize of output 28 [2022-07-19 09:33:15,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2022-07-19 09:33:15,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,822 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 29 treesize of output 28 [2022-07-19 09:33:15,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2022-07-19 09:33:15,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-19 09:33:15,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:33:15,915 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:33:15,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 50 [2022-07-19 09:33:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:33:15,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:33:16,535 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 15 treesize of output 13 [2022-07-19 09:33:16,538 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 28 treesize of output 26 [2022-07-19 09:33:16,545 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 31 treesize of output 27 [2022-07-19 09:33:16,548 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 55 treesize of output 51 [2022-07-19 09:33:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:33:16,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974649708] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:33:16,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:33:16,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 11] total 25 [2022-07-19 09:33:16,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459091184] [2022-07-19 09:33:16,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:33:16,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 09:33:16,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:33:16,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 09:33:16,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-07-19 09:33:16,638 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 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) [2022-07-19 09:33:17,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:33:17,892 INFO L93 Difference]: Finished difference Result 225 states and 268 transitions. [2022-07-19 09:33:17,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 09:33:17,892 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 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) Word has length 41 [2022-07-19 09:33:17,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:33:17,895 INFO L225 Difference]: With dead ends: 225 [2022-07-19 09:33:17,896 INFO L226 Difference]: Without dead ends: 186 [2022-07-19 09:33:17,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 83 SyntacticMatches, 12 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=942, Invalid=3348, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 09:33:17,899 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 625 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:33:17,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 140 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 418 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-07-19 09:33:17,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-19 09:33:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 71. [2022-07-19 09:33:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:17,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2022-07-19 09:33:17,908 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 41 [2022-07-19 09:33:17,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:33:17,908 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2022-07-19 09:33:17,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 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) [2022-07-19 09:33:17,909 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2022-07-19 09:33:17,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 09:33:17,910 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:33:17,910 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:33:17,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 09:33:18,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:33:18,124 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:33:18,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:33:18,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1692770569, now seen corresponding path program 1 times [2022-07-19 09:33:18,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:33:18,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788851093] [2022-07-19 09:33:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:33:18,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:33:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:33:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:33:18,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:33:18,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788851093] [2022-07-19 09:33:18,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788851093] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:33:18,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756554636] [2022-07-19 09:33:18,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:33:18,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:33:18,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:33:18,310 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) [2022-07-19 09:33:18,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 09:33:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:33:18,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-19 09:33:18,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:33:18,449 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 16 treesize of output 12 [2022-07-19 09:33:18,500 INFO L356 Elim1Store]: treesize reduction 296, result has 10.6 percent of original size [2022-07-19 09:33:18,500 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 4 case distinctions, treesize of input 36 treesize of output 47 [2022-07-19 09:33:18,543 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:33:18,544 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 29 treesize of output 28 [2022-07-19 09:33:18,572 INFO L356 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2022-07-19 09:33:18,572 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 4 case distinctions, treesize of input 45 treesize of output 41 [2022-07-19 09:33:18,601 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:33:18,601 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 29 treesize of output 28 [2022-07-19 09:33:18,633 INFO L356 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2022-07-19 09:33:18,633 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 4 case distinctions, treesize of input 45 treesize of output 41 [2022-07-19 09:33:18,685 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:33:18,685 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 29 treesize of output 28 [2022-07-19 09:33:18,735 INFO L356 Elim1Store]: treesize reduction 308, result has 10.2 percent of original size [2022-07-19 09:33:18,735 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 6 case distinctions, treesize of input 51 treesize of output 50 [2022-07-19 09:33:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 09:33:18,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:33:19,251 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 35 treesize of output 31 [2022-07-19 09:33:19,253 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 67 treesize of output 59 [2022-07-19 09:33:19,278 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 17 treesize of output 15 [2022-07-19 09:33:19,281 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 30 [2022-07-19 09:33:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:33:19,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756554636] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:33:19,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:33:19,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 12] total 26 [2022-07-19 09:33:19,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576662459] [2022-07-19 09:33:19,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:33:19,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 09:33:19,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:33:19,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 09:33:19,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-07-19 09:33:19,412 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 26 states, 26 states have (on average 5.115384615384615) internal successors, (133), 26 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:20,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:33:20,019 INFO L93 Difference]: Finished difference Result 172 states and 210 transitions. [2022-07-19 09:33:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 09:33:20,019 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.115384615384615) internal successors, (133), 26 states have internal predecessors, (133), 0 states have call successors, (0), 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 [2022-07-19 09:33:20,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:33:20,020 INFO L225 Difference]: With dead ends: 172 [2022-07-19 09:33:20,020 INFO L226 Difference]: Without dead ends: 114 [2022-07-19 09:33:20,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 83 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2022-07-19 09:33:20,022 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 270 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:33:20,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 105 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 467 Invalid, 0 Unknown, 2 Unchecked, 0.3s Time] [2022-07-19 09:33:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-19 09:33:20,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 77. [2022-07-19 09:33:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 76 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:20,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2022-07-19 09:33:20,028 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 47 [2022-07-19 09:33:20,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:33:20,029 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2022-07-19 09:33:20,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.115384615384615) internal successors, (133), 26 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:20,029 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2022-07-19 09:33:20,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-19 09:33:20,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:33:20,030 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:33:20,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 09:33:20,235 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,SelfDestructingSolverStorable5 [2022-07-19 09:33:20,235 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:33:20,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:33:20,235 INFO L85 PathProgramCache]: Analyzing trace with hash 964465308, now seen corresponding path program 2 times [2022-07-19 09:33:20,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:33:20,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543780256] [2022-07-19 09:33:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:33:20,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:33:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:33:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 09:33:20,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:33:20,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543780256] [2022-07-19 09:33:20,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543780256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:33:20,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29771573] [2022-07-19 09:33:20,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:33:20,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:33:20,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:33:20,465 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) [2022-07-19 09:33:20,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 09:33:20,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:33:20,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:33:20,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-19 09:33:20,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:33:20,594 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 16 treesize of output 12 [2022-07-19 09:33:20,643 INFO L356 Elim1Store]: treesize reduction 296, result has 10.6 percent of original size [2022-07-19 09:33:20,643 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 4 case distinctions, treesize of input 36 treesize of output 47 [2022-07-19 09:33:20,679 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:33:20,679 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 29 treesize of output 28 [2022-07-19 09:33:20,707 INFO L356 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2022-07-19 09:33:20,707 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 4 case distinctions, treesize of input 45 treesize of output 41 [2022-07-19 09:33:20,735 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:33:20,735 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 29 treesize of output 28 [2022-07-19 09:33:20,800 INFO L356 Elim1Store]: treesize reduction 308, result has 10.2 percent of original size [2022-07-19 09:33:20,800 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 6 case distinctions, treesize of input 51 treesize of output 50 [2022-07-19 09:33:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 09:33:20,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:33:21,338 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 17 treesize of output 15 [2022-07-19 09:33:21,342 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 30 [2022-07-19 09:33:21,347 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 35 treesize of output 31 [2022-07-19 09:33:21,349 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 67 treesize of output 59 [2022-07-19 09:33:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:33:21,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29771573] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:33:21,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:33:21,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 13] total 29 [2022-07-19 09:33:21,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647745194] [2022-07-19 09:33:21,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:33:21,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 09:33:21,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:33:21,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 09:33:21,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2022-07-19 09:33:21,501 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 29 states, 29 states have (on average 5.206896551724138) internal successors, (151), 29 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) [2022-07-19 09:33:22,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:33:22,708 INFO L93 Difference]: Finished difference Result 222 states and 264 transitions. [2022-07-19 09:33:22,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-19 09:33:22,708 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.206896551724138) internal successors, (151), 29 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) Word has length 53 [2022-07-19 09:33:22,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:33:22,709 INFO L225 Difference]: With dead ends: 222 [2022-07-19 09:33:22,710 INFO L226 Difference]: Without dead ends: 164 [2022-07-19 09:33:22,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 89 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=727, Invalid=2813, Unknown=0, NotChecked=0, Total=3540 [2022-07-19 09:33:22,712 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 351 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:33:22,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 167 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 795 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-07-19 09:33:22,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-19 09:33:22,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 97. [2022-07-19 09:33:22,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1875) internal successors, (114), 96 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:22,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2022-07-19 09:33:22,720 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 53 [2022-07-19 09:33:22,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:33:22,720 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2022-07-19 09:33:22,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.206896551724138) internal successors, (151), 29 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) [2022-07-19 09:33:22,721 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2022-07-19 09:33:22,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-19 09:33:22,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:33:22,721 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:33:22,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 09:33:22,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:33:22,937 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:33:22,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:33:22,938 INFO L85 PathProgramCache]: Analyzing trace with hash -477181457, now seen corresponding path program 3 times [2022-07-19 09:33:22,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:33:22,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867583058] [2022-07-19 09:33:22,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:33:22,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:33:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:33:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:33:23,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:33:23,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867583058] [2022-07-19 09:33:23,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867583058] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:33:23,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678437913] [2022-07-19 09:33:23,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:33:23,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:33:23,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:33:23,157 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) [2022-07-19 09:33:23,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 09:33:23,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 09:33:23,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:33:23,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-19 09:33:23,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:33:23,492 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 16 treesize of output 12 [2022-07-19 09:33:23,556 INFO L356 Elim1Store]: treesize reduction 296, result has 10.6 percent of original size [2022-07-19 09:33:23,556 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 4 case distinctions, treesize of input 36 treesize of output 47 [2022-07-19 09:33:23,609 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:33:23,610 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 29 treesize of output 28 [2022-07-19 09:33:23,641 INFO L356 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2022-07-19 09:33:23,642 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 3 case distinctions, treesize of input 45 treesize of output 41 [2022-07-19 09:33:23,772 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 19 treesize of output 7 [2022-07-19 09:33:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:33:23,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:33:23,939 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 17 treesize of output 15 [2022-07-19 09:33:23,941 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 30 [2022-07-19 09:33:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 09:33:24,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678437913] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:33:24,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:33:24,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-07-19 09:33:24,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458612952] [2022-07-19 09:33:24,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:33:24,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 09:33:24,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:33:24,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 09:33:24,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-07-19 09:33:24,007 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 25 states, 25 states have (on average 6.64) internal successors, (166), 25 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:24,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:33:24,593 INFO L93 Difference]: Finished difference Result 327 states and 378 transitions. [2022-07-19 09:33:24,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 09:33:24,593 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.64) internal successors, (166), 25 states have internal predecessors, (166), 0 states have call successors, (0), 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 [2022-07-19 09:33:24,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:33:24,594 INFO L225 Difference]: With dead ends: 327 [2022-07-19 09:33:24,594 INFO L226 Difference]: Without dead ends: 256 [2022-07-19 09:33:24,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 103 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 09:33:24,595 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 172 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:33:24,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 289 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 865 Invalid, 0 Unknown, 96 Unchecked, 0.4s Time] [2022-07-19 09:33:24,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-19 09:33:24,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 129. [2022-07-19 09:33:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.171875) internal successors, (150), 128 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) [2022-07-19 09:33:24,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2022-07-19 09:33:24,621 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 59 [2022-07-19 09:33:24,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:33:24,621 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2022-07-19 09:33:24,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.64) internal successors, (166), 25 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:24,621 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2022-07-19 09:33:24,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 09:33:24,622 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:33:24,622 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:33:24,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 09:33:24,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:33:24,823 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:33:24,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:33:24,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1869859285, now seen corresponding path program 4 times [2022-07-19 09:33:24,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:33:24,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061419097] [2022-07-19 09:33:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:33:24,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:33:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:33:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 09:33:25,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:33:25,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061419097] [2022-07-19 09:33:25,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061419097] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:33:25,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342578554] [2022-07-19 09:33:25,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:33:25,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:33:25,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:33:25,105 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) [2022-07-19 09:33:25,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 09:33:25,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:33:25,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:33:25,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 09:33:25,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:33:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 09:33:25,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:33:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 09:33:25,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342578554] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:33:25,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:33:25,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2022-07-19 09:33:25,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128847409] [2022-07-19 09:33:25,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:33:25,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 09:33:25,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:33:25,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 09:33:25,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 09:33:25,784 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand has 34 states, 34 states have (on average 5.911764705882353) internal successors, (201), 34 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:26,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:33:26,127 INFO L93 Difference]: Finished difference Result 355 states and 408 transitions. [2022-07-19 09:33:26,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 09:33:26,128 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.911764705882353) internal successors, (201), 34 states have internal predecessors, (201), 0 states have call successors, (0), 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 71 [2022-07-19 09:33:26,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:33:26,128 INFO L225 Difference]: With dead ends: 355 [2022-07-19 09:33:26,128 INFO L226 Difference]: Without dead ends: 180 [2022-07-19 09:33:26,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 09:33:26,130 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 350 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:33:26,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 166 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:33:26,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-19 09:33:26,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 157. [2022-07-19 09:33:26,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.1346153846153846) internal successors, (177), 156 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:26,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 177 transitions. [2022-07-19 09:33:26,142 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 177 transitions. Word has length 71 [2022-07-19 09:33:26,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:33:26,142 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 177 transitions. [2022-07-19 09:33:26,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.911764705882353) internal successors, (201), 34 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:33:26,142 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 177 transitions. [2022-07-19 09:33:26,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-19 09:33:26,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:33:26,144 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:33:26,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 09:33:26,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:33:26,356 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:33:26,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:33:26,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1263359473, now seen corresponding path program 1 times [2022-07-19 09:33:26,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:33:26,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005792142] [2022-07-19 09:33:26,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:33:26,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:33:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:33:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-19 09:33:26,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:33:26,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005792142] [2022-07-19 09:33:26,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005792142] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:33:26,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:33:26,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 09:33:26,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976142768] [2022-07-19 09:33:26,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:33:26,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:33:26,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:33:26,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:33:26,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:33:26,445 INFO L87 Difference]: Start difference. First operand 157 states and 177 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 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) [2022-07-19 09:33:26,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:33:26,456 INFO L93 Difference]: Finished difference Result 212 states and 240 transitions. [2022-07-19 09:33:26,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:33:26,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-07-19 09:33:26,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:33:26,457 INFO L225 Difference]: With dead ends: 212 [2022-07-19 09:33:26,457 INFO L226 Difference]: Without dead ends: 97 [2022-07-19 09:33:26,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:33:26,458 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:33:26,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 40 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:33:26,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-19 09:33:26,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2022-07-19 09:33:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.098901098901099) internal successors, (100), 91 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) [2022-07-19 09:33:26,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-07-19 09:33:26,468 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 83 [2022-07-19 09:33:26,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:33:26,468 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-07-19 09:33:26,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 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) [2022-07-19 09:33:26,468 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-07-19 09:33:26,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 09:33:26,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:33:26,469 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:33:26,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 09:33:26,469 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:33:26,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:33:26,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2130271302, now seen corresponding path program 5 times [2022-07-19 09:33:26,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:33:26,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807057564] [2022-07-19 09:33:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:33:26,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:33:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:33:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 34 proven. 55 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 09:33:26,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:33:26,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807057564] [2022-07-19 09:33:26,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807057564] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:33:26,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57708597] [2022-07-19 09:33:26,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:33:26,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:33:26,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:33:26,660 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) [2022-07-19 09:33:26,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 09:34:08,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-19 09:34:08,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:34:08,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-19 09:34:08,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:09,097 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 16 treesize of output 12 [2022-07-19 09:34:09,166 INFO L356 Elim1Store]: treesize reduction 534, result has 8.4 percent of original size [2022-07-19 09:34:09,166 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 4 case distinctions, treesize of input 53 treesize of output 64 [2022-07-19 09:34:09,203 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:34:09,204 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 26 treesize of output 25 [2022-07-19 09:34:09,252 INFO L356 Elim1Store]: treesize reduction 336, result has 9.9 percent of original size [2022-07-19 09:34:09,252 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 6 case distinctions, treesize of input 44 treesize of output 49 [2022-07-19 09:34:09,406 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 19 treesize of output 7 [2022-07-19 09:34:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:09,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:09,606 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 25 treesize of output 23 [2022-07-19 09:34:09,608 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 88 treesize of output 84 [2022-07-19 09:34:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 35 proven. 61 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 09:34:09,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57708597] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:09,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:09,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 19] total 43 [2022-07-19 09:34:09,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738603699] [2022-07-19 09:34:09,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:09,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-19 09:34:09,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:09,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-19 09:34:09,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1433, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 09:34:09,999 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 43 states, 43 states have (on average 5.209302325581396) internal successors, (224), 43 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:34:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:10,882 INFO L93 Difference]: Finished difference Result 135 states and 148 transitions. [2022-07-19 09:34:10,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 09:34:10,883 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.209302325581396) internal successors, (224), 43 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-07-19 09:34:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:10,883 INFO L225 Difference]: With dead ends: 135 [2022-07-19 09:34:10,883 INFO L226 Difference]: Without dead ends: 125 [2022-07-19 09:34:10,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 155 SyntacticMatches, 14 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=678, Invalid=2514, Unknown=0, NotChecked=0, Total=3192 [2022-07-19 09:34:10,885 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 349 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:10,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 348 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 972 Invalid, 0 Unknown, 161 Unchecked, 0.4s Time] [2022-07-19 09:34:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-19 09:34:10,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 92. [2022-07-19 09:34:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 91 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:34:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2022-07-19 09:34:10,891 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 91 [2022-07-19 09:34:10,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:10,892 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2022-07-19 09:34:10,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.209302325581396) internal successors, (224), 43 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:34:10,892 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2022-07-19 09:34:10,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 09:34:10,892 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:10,893 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:34:10,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:11,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:11,107 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:11,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:11,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1771668984, now seen corresponding path program 6 times [2022-07-19 09:34:11,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:11,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68878316] [2022-07-19 09:34:11,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:11,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 96 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 09:34:11,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:11,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68878316] [2022-07-19 09:34:11,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68878316] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:11,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262674523] [2022-07-19 09:34:11,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:34:11,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:11,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:11,631 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) [2022-07-19 09:34:11,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 09:34:13,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-19 09:34:13,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:34:13,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-19 09:34:13,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:13,133 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 16 treesize of output 12 [2022-07-19 09:34:13,217 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-19 09:34:13,217 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 4 case distinctions, treesize of input 38 treesize of output 49 [2022-07-19 09:34:13,284 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:34:13,285 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 26 treesize of output 25 [2022-07-19 09:34:13,331 INFO L356 Elim1Store]: treesize reduction 480, result has 8.7 percent of original size [2022-07-19 09:34:13,332 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 4 case distinctions, treesize of input 50 treesize of output 61 [2022-07-19 09:34:13,377 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:34:13,377 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 29 treesize of output 28 [2022-07-19 09:34:13,409 INFO L356 Elim1Store]: treesize reduction 181, result has 13.4 percent of original size [2022-07-19 09:34:13,409 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 4 case distinctions, treesize of input 47 treesize of output 43 [2022-07-19 09:34:13,448 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:34:13,448 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 26 treesize of output 25 [2022-07-19 09:34:13,492 INFO L356 Elim1Store]: treesize reduction 480, result has 8.7 percent of original size [2022-07-19 09:34:13,493 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 4 case distinctions, treesize of input 50 treesize of output 61 [2022-07-19 09:34:13,529 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:34:13,531 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 29 treesize of output 28 [2022-07-19 09:34:13,564 INFO L356 Elim1Store]: treesize reduction 253, result has 10.0 percent of original size [2022-07-19 09:34:13,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 62 treesize of output 40 [2022-07-19 09:34:13,617 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:34:13,617 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 26 treesize of output 25 [2022-07-19 09:34:13,664 INFO L356 Elim1Store]: treesize reduction 480, result has 8.7 percent of original size [2022-07-19 09:34:13,664 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 4 case distinctions, treesize of input 50 treesize of output 61 [2022-07-19 09:34:13,704 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:34:13,705 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 26 treesize of output 25 [2022-07-19 09:34:13,782 INFO L356 Elim1Store]: treesize reduction 479, result has 11.5 percent of original size [2022-07-19 09:34:13,782 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 6 case distinctions, treesize of input 62 treesize of output 80 [2022-07-19 09:34:13,875 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:34:13,875 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 26 treesize of output 25 [2022-07-19 09:34:13,916 INFO L356 Elim1Store]: treesize reduction 480, result has 8.7 percent of original size [2022-07-19 09:34:13,917 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 4 case distinctions, treesize of input 50 treesize of output 61 [2022-07-19 09:34:13,947 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:34:13,948 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 26 treesize of output 25 [2022-07-19 09:34:13,990 INFO L356 Elim1Store]: treesize reduction 181, result has 13.4 percent of original size [2022-07-19 09:34:13,991 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 4 case distinctions, treesize of input 47 treesize of output 43 [2022-07-19 09:34:14,176 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 19 treesize of output 7 [2022-07-19 09:34:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:34:14,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:37,700 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 49 treesize of output 47 [2022-07-19 09:34:37,704 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 13864 treesize of output 13800 [2022-07-19 09:34:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 09:34:43,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262674523] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:43,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:43,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 22] total 52 [2022-07-19 09:34:43,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102351091] [2022-07-19 09:34:43,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:43,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-19 09:34:43,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:43,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-19 09:34:43,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=2300, Unknown=5, NotChecked=0, Total=2652 [2022-07-19 09:34:43,081 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 52 states, 52 states have (on average 4.923076923076923) internal successors, (256), 52 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:35:01,540 WARN L233 SmtUtils]: Spent 14.04s on a formula simplification. DAG size of input: 83 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 09:35:56,570 WARN L233 SmtUtils]: Spent 44.92s on a formula simplification. DAG size of input: 88 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 09:36:40,656 WARN L233 SmtUtils]: Spent 24.02s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 09:37:26,141 WARN L233 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 09:37:43,392 WARN L233 SmtUtils]: Spent 11.21s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)