./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label29.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label29.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 372b0f8557f493ed9d29c5f8057b8dc54ad330866696fd4878e863a88379edbf --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 11:25:46,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:25:46,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:25:46,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:25:46,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:25:46,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:25:46,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:25:46,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:25:46,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:25:46,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:25:46,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:25:46,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:25:46,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:25:46,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:25:46,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:25:46,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:25:46,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:25:46,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:25:46,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:25:46,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:25:46,932 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:25:46,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:25:46,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:25:46,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:25:46,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:25:46,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 11:25:46,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 11:25:46,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 11:25:46,940 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 11:25:46,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 11:25:46,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 11:25:46,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 11:25:46,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 11:25:46,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 11:25:46,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 11:25:46,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 11:25:46,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 11:25:46,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 11:25:46,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 11:25:46,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:25:46,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:25:46,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:25:46,949 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 11:25:46,979 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:25:46,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:25:46,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:25:46,980 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:25:46,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 11:25:46,981 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 11:25:46,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:25:46,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:25:46,982 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:25:46,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:25:46,982 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:25:46,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 11:25:46,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:25:46,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:25:46,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 11:25:46,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 11:25:46,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 11:25:46,983 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:25:46,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:25:46,984 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:25:46,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 11:25:46,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:25:46,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:25:46,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 11:25:46,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:25:46,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:25:46,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 11:25:46,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 11:25:46,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 11:25:46,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 11:25:46,986 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:25:46,986 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 11:25:46,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 11:25:46,987 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 372b0f8557f493ed9d29c5f8057b8dc54ad330866696fd4878e863a88379edbf [2022-07-22 11:25:47,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:25:47,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:25:47,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:25:47,189 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:25:47,189 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:25:47,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label29.c [2022-07-22 11:25:47,234 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/602729115/726cf1c35ef94cea82d5d7158ea3aa8b/FLAG9da489cfa [2022-07-22 11:25:47,702 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:25:47,702 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label29.c [2022-07-22 11:25:47,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/602729115/726cf1c35ef94cea82d5d7158ea3aa8b/FLAG9da489cfa [2022-07-22 11:25:48,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/602729115/726cf1c35ef94cea82d5d7158ea3aa8b [2022-07-22 11:25:48,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:25:48,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:25:48,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:25:48,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:25:48,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:25:48,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:25:48" (1/1) ... [2022-07-22 11:25:48,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@553ceb4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:25:48, skipping insertion in model container [2022-07-22 11:25:48,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:25:48" (1/1) ... [2022-07-22 11:25:48,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:25:48,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:25:48,493 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label29.c[58258,58271] [2022-07-22 11:25:48,528 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:25:48,534 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:25:48,695 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label29.c[58258,58271] [2022-07-22 11:25:48,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:25:48,717 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:25:48,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:25:48 WrapperNode [2022-07-22 11:25:48,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:25:48,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:25:48,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:25:48,719 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:25:48,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:25:48" (1/1) ... [2022-07-22 11:25:48,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:25:48" (1/1) ... [2022-07-22 11:25:48,810 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-07-22 11:25:48,811 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:25:48,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:25:48,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:25:48,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:25:48,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:25:48" (1/1) ... [2022-07-22 11:25:48,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:25:48" (1/1) ... [2022-07-22 11:25:48,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:25:48" (1/1) ... [2022-07-22 11:25:48,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:25:48" (1/1) ... [2022-07-22 11:25:48,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:25:48" (1/1) ... [2022-07-22 11:25:48,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:25:48" (1/1) ... [2022-07-22 11:25:48,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:25:48" (1/1) ... [2022-07-22 11:25:48,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:25:48,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:25:48,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:25:48,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:25:48,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:25:48" (1/1) ... [2022-07-22 11:25:48,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:25:48,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:25:48,955 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 11:25:48,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 11:25:49,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:25:49,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 11:25:49,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:25:49,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:25:49,082 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:25:49,086 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:25:50,174 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:25:50,183 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:25:50,184 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 11:25:50,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:25:50 BoogieIcfgContainer [2022-07-22 11:25:50,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:25:50,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:25:50,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:25:50,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:25:50,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:25:48" (1/3) ... [2022-07-22 11:25:50,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@432857ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:25:50, skipping insertion in model container [2022-07-22 11:25:50,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:25:48" (2/3) ... [2022-07-22 11:25:50,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@432857ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:25:50, skipping insertion in model container [2022-07-22 11:25:50,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:25:50" (3/3) ... [2022-07-22 11:25:50,193 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label29.c [2022-07-22 11:25:50,205 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:25:50,205 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:25:50,259 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:25:50,264 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@20472f49, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1f122712 [2022-07-22 11:25:50,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:25:50,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-07-22 11:25:50,286 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:25:50,287 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:25:50,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:25:50,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:25:50,292 INFO L85 PathProgramCache]: Analyzing trace with hash 800753066, now seen corresponding path program 1 times [2022-07-22 11:25:50,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:25:50,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33230273] [2022-07-22 11:25:50,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:25:50,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:25:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:25:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:25:50,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:25:50,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33230273] [2022-07-22 11:25:50,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33230273] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:25:50,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:25:50,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:25:50,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866446542] [2022-07-22 11:25:50,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:25:50,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:25:50,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:25:50,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:25:50,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:25:50,807 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:51,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:25:51,587 INFO L93 Difference]: Finished difference Result 823 states and 1459 transitions. [2022-07-22 11:25:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:25:51,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 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 178 [2022-07-22 11:25:51,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:25:51,599 INFO L225 Difference]: With dead ends: 823 [2022-07-22 11:25:51,599 INFO L226 Difference]: Without dead ends: 444 [2022-07-22 11:25:51,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:25:51,604 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 53 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:25:51,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 244 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:25:51,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-07-22 11:25:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 443. [2022-07-22 11:25:51,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.420814479638009) internal successors, (628), 442 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:51,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 628 transitions. [2022-07-22 11:25:51,649 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 628 transitions. Word has length 178 [2022-07-22 11:25:51,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:25:51,650 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 628 transitions. [2022-07-22 11:25:51,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:51,651 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 628 transitions. [2022-07-22 11:25:51,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-07-22 11:25:51,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:25:51,654 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:25:51,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 11:25:51,654 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:25:51,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:25:51,655 INFO L85 PathProgramCache]: Analyzing trace with hash -726821495, now seen corresponding path program 1 times [2022-07-22 11:25:51,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:25:51,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613861190] [2022-07-22 11:25:51,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:25:51,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:25:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:25:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:25:51,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:25:51,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613861190] [2022-07-22 11:25:51,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613861190] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:25:51,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:25:51,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:25:51,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189371220] [2022-07-22 11:25:51,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:25:51,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:25:51,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:25:51,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:25:51,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:25:51,754 INFO L87 Difference]: Start difference. First operand 443 states and 628 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:52,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:25:52,408 INFO L93 Difference]: Finished difference Result 1310 states and 1864 transitions. [2022-07-22 11:25:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:25:52,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2022-07-22 11:25:52,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:25:52,422 INFO L225 Difference]: With dead ends: 1310 [2022-07-22 11:25:52,422 INFO L226 Difference]: Without dead ends: 869 [2022-07-22 11:25:52,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:25:52,425 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:25:52,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:25:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-07-22 11:25:52,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 855. [2022-07-22 11:25:52,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 1.3864168618266979) internal successors, (1184), 854 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:52,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1184 transitions. [2022-07-22 11:25:52,444 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1184 transitions. Word has length 186 [2022-07-22 11:25:52,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:25:52,444 INFO L495 AbstractCegarLoop]: Abstraction has 855 states and 1184 transitions. [2022-07-22 11:25:52,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:52,445 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1184 transitions. [2022-07-22 11:25:52,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-22 11:25:52,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:25:52,447 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:25:52,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 11:25:52,448 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:25:52,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:25:52,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1639909094, now seen corresponding path program 1 times [2022-07-22 11:25:52,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:25:52,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006578964] [2022-07-22 11:25:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:25:52,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:25:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:25:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:25:52,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:25:52,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006578964] [2022-07-22 11:25:52,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006578964] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:25:52,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:25:52,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:25:52,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150464181] [2022-07-22 11:25:52,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:25:52,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:25:52,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:25:52,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:25:52,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:25:52,541 INFO L87 Difference]: Start difference. First operand 855 states and 1184 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:53,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:25:53,107 INFO L93 Difference]: Finished difference Result 2539 states and 3516 transitions. [2022-07-22 11:25:53,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:25:53,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2022-07-22 11:25:53,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:25:53,113 INFO L225 Difference]: With dead ends: 2539 [2022-07-22 11:25:53,113 INFO L226 Difference]: Without dead ends: 1686 [2022-07-22 11:25:53,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:25:53,115 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 243 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:25:53,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 222 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:25:53,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2022-07-22 11:25:53,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1682. [2022-07-22 11:25:53,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1682 states, 1681 states have (on average 1.3248066627007733) internal successors, (2227), 1681 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:53,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2227 transitions. [2022-07-22 11:25:53,138 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2227 transitions. Word has length 191 [2022-07-22 11:25:53,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:25:53,139 INFO L495 AbstractCegarLoop]: Abstraction has 1682 states and 2227 transitions. [2022-07-22 11:25:53,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:53,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2227 transitions. [2022-07-22 11:25:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-07-22 11:25:53,142 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:25:53,143 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:25:53,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 11:25:53,143 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:25:53,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:25:53,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1294418448, now seen corresponding path program 1 times [2022-07-22 11:25:53,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:25:53,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980871484] [2022-07-22 11:25:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:25:53,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:25:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:25:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 11:25:53,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:25:53,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980871484] [2022-07-22 11:25:53,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980871484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:25:53,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:25:53,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:25:53,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013797272] [2022-07-22 11:25:53,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:25:53,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:25:53,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:25:53,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:25:53,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:25:53,197 INFO L87 Difference]: Start difference. First operand 1682 states and 2227 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:53,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:25:53,762 INFO L93 Difference]: Finished difference Result 4178 states and 5696 transitions. [2022-07-22 11:25:53,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:25:53,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 198 [2022-07-22 11:25:53,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:25:53,770 INFO L225 Difference]: With dead ends: 4178 [2022-07-22 11:25:53,770 INFO L226 Difference]: Without dead ends: 2498 [2022-07-22 11:25:53,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:25:53,772 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 236 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:25:53,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 401 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:25:53,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2022-07-22 11:25:53,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2496. [2022-07-22 11:25:53,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2495 states have (on average 1.2681362725450902) internal successors, (3164), 2495 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:53,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 3164 transitions. [2022-07-22 11:25:53,807 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 3164 transitions. Word has length 198 [2022-07-22 11:25:53,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:25:53,807 INFO L495 AbstractCegarLoop]: Abstraction has 2496 states and 3164 transitions. [2022-07-22 11:25:53,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:53,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 3164 transitions. [2022-07-22 11:25:53,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-07-22 11:25:53,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:25:53,811 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:25:53,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 11:25:53,812 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:25:53,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:25:53,812 INFO L85 PathProgramCache]: Analyzing trace with hash -225463204, now seen corresponding path program 1 times [2022-07-22 11:25:53,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:25:53,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47628373] [2022-07-22 11:25:53,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:25:53,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:25:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:25:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 11:25:53,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:25:53,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47628373] [2022-07-22 11:25:53,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47628373] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:25:53,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:25:53,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:25:53,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058542318] [2022-07-22 11:25:53,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:25:53,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:25:53,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:25:53,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:25:53,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:25:53,870 INFO L87 Difference]: Start difference. First operand 2496 states and 3164 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 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) [2022-07-22 11:25:54,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:25:54,441 INFO L93 Difference]: Finished difference Result 6217 states and 7859 transitions. [2022-07-22 11:25:54,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:25:54,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 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 206 [2022-07-22 11:25:54,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:25:54,451 INFO L225 Difference]: With dead ends: 6217 [2022-07-22 11:25:54,451 INFO L226 Difference]: Without dead ends: 3723 [2022-07-22 11:25:54,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:25:54,455 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:25:54,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 380 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:25:54,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2022-07-22 11:25:54,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3715. [2022-07-22 11:25:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3715 states, 3714 states have (on average 1.2242864835756597) internal successors, (4547), 3714 states have internal predecessors, (4547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:54,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3715 states to 3715 states and 4547 transitions. [2022-07-22 11:25:54,514 INFO L78 Accepts]: Start accepts. Automaton has 3715 states and 4547 transitions. Word has length 206 [2022-07-22 11:25:54,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:25:54,515 INFO L495 AbstractCegarLoop]: Abstraction has 3715 states and 4547 transitions. [2022-07-22 11:25:54,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 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) [2022-07-22 11:25:54,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3715 states and 4547 transitions. [2022-07-22 11:25:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-07-22 11:25:54,523 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:25:54,523 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:25:54,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 11:25:54,524 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:25:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:25:54,525 INFO L85 PathProgramCache]: Analyzing trace with hash 409707928, now seen corresponding path program 1 times [2022-07-22 11:25:54,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:25:54,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569939865] [2022-07-22 11:25:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:25:54,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:25:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:25:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 11:25:54,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:25:54,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569939865] [2022-07-22 11:25:54,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569939865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:25:54,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:25:54,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:25:54,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743314082] [2022-07-22 11:25:54,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:25:54,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:25:54,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:25:54,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:25:54,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:25:54,605 INFO L87 Difference]: Start difference. First operand 3715 states and 4547 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:55,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:25:55,191 INFO L93 Difference]: Finished difference Result 9470 states and 11742 transitions. [2022-07-22 11:25:55,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:25:55,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 213 [2022-07-22 11:25:55,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:25:55,205 INFO L225 Difference]: With dead ends: 9470 [2022-07-22 11:25:55,206 INFO L226 Difference]: Without dead ends: 5757 [2022-07-22 11:25:55,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:25:55,210 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 202 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:25:55,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 390 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:25:55,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5757 states. [2022-07-22 11:25:55,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5757 to 5550. [2022-07-22 11:25:55,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 1.2094071003784466) internal successors, (6711), 5549 states have internal predecessors, (6711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 6711 transitions. [2022-07-22 11:25:55,305 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 6711 transitions. Word has length 213 [2022-07-22 11:25:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:25:55,306 INFO L495 AbstractCegarLoop]: Abstraction has 5550 states and 6711 transitions. [2022-07-22 11:25:55,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:55,306 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 6711 transitions. [2022-07-22 11:25:55,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-07-22 11:25:55,313 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:25:55,313 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:25:55,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 11:25:55,313 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:25:55,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:25:55,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1735843397, now seen corresponding path program 1 times [2022-07-22 11:25:55,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:25:55,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393574227] [2022-07-22 11:25:55,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:25:55,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:25:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:25:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 11:25:55,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:25:55,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393574227] [2022-07-22 11:25:55,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393574227] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:25:55,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:25:55,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:25:55,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703635050] [2022-07-22 11:25:55,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:25:55,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:25:55,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:25:55,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:25:55,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:25:55,382 INFO L87 Difference]: Start difference. First operand 5550 states and 6711 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:56,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:25:56,005 INFO L93 Difference]: Finished difference Result 14373 states and 17485 transitions. [2022-07-22 11:25:56,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:25:56,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 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 221 [2022-07-22 11:25:56,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:25:56,029 INFO L225 Difference]: With dead ends: 14373 [2022-07-22 11:25:56,029 INFO L226 Difference]: Without dead ends: 8825 [2022-07-22 11:25:56,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:25:56,038 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 211 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:25:56,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 240 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:25:56,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8825 states. [2022-07-22 11:25:56,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8825 to 8807. [2022-07-22 11:25:56,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8807 states, 8806 states have (on average 1.2158755394049512) internal successors, (10707), 8806 states have internal predecessors, (10707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:56,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8807 states to 8807 states and 10707 transitions. [2022-07-22 11:25:56,182 INFO L78 Accepts]: Start accepts. Automaton has 8807 states and 10707 transitions. Word has length 221 [2022-07-22 11:25:56,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:25:56,182 INFO L495 AbstractCegarLoop]: Abstraction has 8807 states and 10707 transitions. [2022-07-22 11:25:56,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:56,183 INFO L276 IsEmpty]: Start isEmpty. Operand 8807 states and 10707 transitions. [2022-07-22 11:25:56,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-07-22 11:25:56,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:25:56,192 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:25:56,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 11:25:56,192 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:25:56,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:25:56,193 INFO L85 PathProgramCache]: Analyzing trace with hash -963709385, now seen corresponding path program 1 times [2022-07-22 11:25:56,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:25:56,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191119493] [2022-07-22 11:25:56,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:25:56,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:25:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:25:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:25:56,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:25:56,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191119493] [2022-07-22 11:25:56,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191119493] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:25:56,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:25:56,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:25:56,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780327072] [2022-07-22 11:25:56,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:25:56,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:25:56,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:25:56,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:25:56,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:25:56,256 INFO L87 Difference]: Start difference. First operand 8807 states and 10707 transitions. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:57,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:25:57,141 INFO L93 Difference]: Finished difference Result 17226 states and 21003 transitions. [2022-07-22 11:25:57,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:25:57,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-07-22 11:25:57,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:25:57,159 INFO L225 Difference]: With dead ends: 17226 [2022-07-22 11:25:57,159 INFO L226 Difference]: Without dead ends: 8827 [2022-07-22 11:25:57,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:25:57,168 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 434 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:25:57,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 199 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 11:25:57,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8827 states. [2022-07-22 11:25:57,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8827 to 8401. [2022-07-22 11:25:57,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8401 states, 8400 states have (on average 1.215952380952381) internal successors, (10214), 8400 states have internal predecessors, (10214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:57,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8401 states to 8401 states and 10214 transitions. [2022-07-22 11:25:57,272 INFO L78 Accepts]: Start accepts. Automaton has 8401 states and 10214 transitions. Word has length 222 [2022-07-22 11:25:57,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:25:57,273 INFO L495 AbstractCegarLoop]: Abstraction has 8401 states and 10214 transitions. [2022-07-22 11:25:57,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:57,273 INFO L276 IsEmpty]: Start isEmpty. Operand 8401 states and 10214 transitions. [2022-07-22 11:25:57,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-07-22 11:25:57,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:25:57,282 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:25:57,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 11:25:57,284 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:25:57,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:25:57,284 INFO L85 PathProgramCache]: Analyzing trace with hash 134644404, now seen corresponding path program 1 times [2022-07-22 11:25:57,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:25:57,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992500596] [2022-07-22 11:25:57,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:25:57,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:25:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:25:57,389 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 11:25:57,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:25:57,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992500596] [2022-07-22 11:25:57,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992500596] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:25:57,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:25:57,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:25:57,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558409564] [2022-07-22 11:25:57,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:25:57,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:25:57,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:25:57,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:25:57,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:25:57,393 INFO L87 Difference]: Start difference. First operand 8401 states and 10214 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:25:58,002 INFO L93 Difference]: Finished difference Result 21912 states and 26959 transitions. [2022-07-22 11:25:58,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:25:58,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 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 226 [2022-07-22 11:25:58,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:25:58,022 INFO L225 Difference]: With dead ends: 21912 [2022-07-22 11:25:58,023 INFO L226 Difference]: Without dead ends: 13919 [2022-07-22 11:25:58,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:25:58,032 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 219 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:25:58,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 122 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:25:58,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13919 states. [2022-07-22 11:25:58,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13919 to 13907. [2022-07-22 11:25:58,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13907 states, 13906 states have (on average 1.212138645189127) internal successors, (16856), 13906 states have internal predecessors, (16856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:58,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13907 states to 13907 states and 16856 transitions. [2022-07-22 11:25:58,166 INFO L78 Accepts]: Start accepts. Automaton has 13907 states and 16856 transitions. Word has length 226 [2022-07-22 11:25:58,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:25:58,167 INFO L495 AbstractCegarLoop]: Abstraction has 13907 states and 16856 transitions. [2022-07-22 11:25:58,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:58,167 INFO L276 IsEmpty]: Start isEmpty. Operand 13907 states and 16856 transitions. [2022-07-22 11:25:58,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-07-22 11:25:58,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:25:58,178 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:25:58,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 11:25:58,178 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:25:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:25:58,182 INFO L85 PathProgramCache]: Analyzing trace with hash 637188002, now seen corresponding path program 1 times [2022-07-22 11:25:58,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:25:58,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238300497] [2022-07-22 11:25:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:25:58,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:25:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:25:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 11:25:58,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:25:58,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238300497] [2022-07-22 11:25:58,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238300497] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:25:58,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472790126] [2022-07-22 11:25:58,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:25:58,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:25:58,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:25:58,282 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:25:58,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 11:25:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:25:58,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:25:58,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:25:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 11:25:58,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:25:58,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472790126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:25:58,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:25:58,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-22 11:25:58,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419354278] [2022-07-22 11:25:58,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:25:58,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:25:58,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:25:58,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:25:58,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:25:58,650 INFO L87 Difference]: Start difference. First operand 13907 states and 16856 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:59,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:25:59,253 INFO L93 Difference]: Finished difference Result 32303 states and 39651 transitions. [2022-07-22 11:25:59,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:25:59,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2022-07-22 11:25:59,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:25:59,280 INFO L225 Difference]: With dead ends: 32303 [2022-07-22 11:25:59,280 INFO L226 Difference]: Without dead ends: 18804 [2022-07-22 11:25:59,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:25:59,296 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 67 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:25:59,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 180 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:25:59,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18804 states. [2022-07-22 11:25:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18804 to 17563. [2022-07-22 11:25:59,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17563 states, 17562 states have (on average 1.2337433094180617) internal successors, (21667), 17562 states have internal predecessors, (21667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:59,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17563 states to 17563 states and 21667 transitions. [2022-07-22 11:25:59,539 INFO L78 Accepts]: Start accepts. Automaton has 17563 states and 21667 transitions. Word has length 229 [2022-07-22 11:25:59,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:25:59,539 INFO L495 AbstractCegarLoop]: Abstraction has 17563 states and 21667 transitions. [2022-07-22 11:25:59,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:59,540 INFO L276 IsEmpty]: Start isEmpty. Operand 17563 states and 21667 transitions. [2022-07-22 11:25:59,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-07-22 11:25:59,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:25:59,554 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:25:59,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 11:25:59,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 11:25:59,772 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:25:59,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:25:59,773 INFO L85 PathProgramCache]: Analyzing trace with hash 2089717992, now seen corresponding path program 1 times [2022-07-22 11:25:59,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:25:59,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622134572] [2022-07-22 11:25:59,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:25:59,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:25:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:25:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-22 11:25:59,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:25:59,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622134572] [2022-07-22 11:25:59,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622134572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:25:59,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:25:59,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:25:59,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726665294] [2022-07-22 11:25:59,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:25:59,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:25:59,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:25:59,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:25:59,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:25:59,849 INFO L87 Difference]: Start difference. First operand 17563 states and 21667 transitions. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:00,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:00,574 INFO L93 Difference]: Finished difference Result 41574 states and 51624 transitions. [2022-07-22 11:26:00,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:26:00,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 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 257 [2022-07-22 11:26:00,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:00,603 INFO L225 Difference]: With dead ends: 41574 [2022-07-22 11:26:00,604 INFO L226 Difference]: Without dead ends: 24419 [2022-07-22 11:26:00,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:26:00,621 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 453 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:00,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 56 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:26:00,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24419 states. [2022-07-22 11:26:00,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24419 to 24216. [2022-07-22 11:26:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24216 states, 24215 states have (on average 1.1655585380962215) internal successors, (28224), 24215 states have internal predecessors, (28224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:00,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24216 states to 24216 states and 28224 transitions. [2022-07-22 11:26:00,916 INFO L78 Accepts]: Start accepts. Automaton has 24216 states and 28224 transitions. Word has length 257 [2022-07-22 11:26:00,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:00,917 INFO L495 AbstractCegarLoop]: Abstraction has 24216 states and 28224 transitions. [2022-07-22 11:26:00,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:00,917 INFO L276 IsEmpty]: Start isEmpty. Operand 24216 states and 28224 transitions. [2022-07-22 11:26:00,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-07-22 11:26:00,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:00,941 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:00,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 11:26:00,941 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:00,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:00,942 INFO L85 PathProgramCache]: Analyzing trace with hash -16635291, now seen corresponding path program 1 times [2022-07-22 11:26:00,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:00,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906979036] [2022-07-22 11:26:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:00,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-22 11:26:01,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:01,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906979036] [2022-07-22 11:26:01,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906979036] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:01,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:01,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:26:01,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388306564] [2022-07-22 11:26:01,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:01,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:26:01,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:01,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:26:01,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:26:01,033 INFO L87 Difference]: Start difference. First operand 24216 states and 28224 transitions. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:01,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:01,904 INFO L93 Difference]: Finished difference Result 65122 states and 76033 transitions. [2022-07-22 11:26:01,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:26:01,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 296 [2022-07-22 11:26:01,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:01,946 INFO L225 Difference]: With dead ends: 65122 [2022-07-22 11:26:01,947 INFO L226 Difference]: Without dead ends: 41721 [2022-07-22 11:26:01,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:26:01,963 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 543 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:01,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 473 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:26:01,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41721 states. [2022-07-22 11:26:02,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41721 to 40091. [2022-07-22 11:26:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40091 states, 40090 states have (on average 1.1610376652531804) internal successors, (46546), 40090 states have internal predecessors, (46546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40091 states to 40091 states and 46546 transitions. [2022-07-22 11:26:02,424 INFO L78 Accepts]: Start accepts. Automaton has 40091 states and 46546 transitions. Word has length 296 [2022-07-22 11:26:02,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:02,424 INFO L495 AbstractCegarLoop]: Abstraction has 40091 states and 46546 transitions. [2022-07-22 11:26:02,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:02,425 INFO L276 IsEmpty]: Start isEmpty. Operand 40091 states and 46546 transitions. [2022-07-22 11:26:02,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-07-22 11:26:02,443 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:02,444 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:02,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 11:26:02,444 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:02,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:02,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1020920726, now seen corresponding path program 1 times [2022-07-22 11:26:02,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:02,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262266202] [2022-07-22 11:26:02,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:02,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-22 11:26:02,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:02,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262266202] [2022-07-22 11:26:02,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262266202] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:02,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:02,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:26:02,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392218805] [2022-07-22 11:26:02,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:02,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:26:02,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:02,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:26:02,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:26:02,641 INFO L87 Difference]: Start difference. First operand 40091 states and 46546 transitions. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:03,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:03,616 INFO L93 Difference]: Finished difference Result 85900 states and 99776 transitions. [2022-07-22 11:26:03,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:26:03,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 306 [2022-07-22 11:26:03,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:03,666 INFO L225 Difference]: With dead ends: 85900 [2022-07-22 11:26:03,666 INFO L226 Difference]: Without dead ends: 46827 [2022-07-22 11:26:03,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:26:03,692 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 363 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:03,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 87 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:26:03,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46827 states. [2022-07-22 11:26:04,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46827 to 42132. [2022-07-22 11:26:04,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42132 states, 42131 states have (on average 1.162232085637654) internal successors, (48966), 42131 states have internal predecessors, (48966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:04,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42132 states to 42132 states and 48966 transitions. [2022-07-22 11:26:04,221 INFO L78 Accepts]: Start accepts. Automaton has 42132 states and 48966 transitions. Word has length 306 [2022-07-22 11:26:04,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:04,221 INFO L495 AbstractCegarLoop]: Abstraction has 42132 states and 48966 transitions. [2022-07-22 11:26:04,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:04,222 INFO L276 IsEmpty]: Start isEmpty. Operand 42132 states and 48966 transitions. [2022-07-22 11:26:04,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-07-22 11:26:04,240 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:04,240 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:04,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 11:26:04,240 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:04,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:04,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1542995501, now seen corresponding path program 1 times [2022-07-22 11:26:04,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:04,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346135958] [2022-07-22 11:26:04,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:04,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-07-22 11:26:04,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:04,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346135958] [2022-07-22 11:26:04,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346135958] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:04,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:04,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:26:04,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172147991] [2022-07-22 11:26:04,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:04,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:04,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:04,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:04,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:04,313 INFO L87 Difference]: Start difference. First operand 42132 states and 48966 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:05,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:05,123 INFO L93 Difference]: Finished difference Result 94640 states and 109952 transitions. [2022-07-22 11:26:05,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:05,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 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 313 [2022-07-22 11:26:05,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:05,185 INFO L225 Difference]: With dead ends: 94640 [2022-07-22 11:26:05,185 INFO L226 Difference]: Without dead ends: 53526 [2022-07-22 11:26:05,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:05,214 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 224 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:05,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 160 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:26:05,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53526 states. [2022-07-22 11:26:05,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53526 to 53117. [2022-07-22 11:26:05,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53117 states, 53116 states have (on average 1.157447849988704) internal successors, (61479), 53116 states have internal predecessors, (61479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:05,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53117 states to 53117 states and 61479 transitions. [2022-07-22 11:26:05,849 INFO L78 Accepts]: Start accepts. Automaton has 53117 states and 61479 transitions. Word has length 313 [2022-07-22 11:26:05,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:05,849 INFO L495 AbstractCegarLoop]: Abstraction has 53117 states and 61479 transitions. [2022-07-22 11:26:05,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:05,850 INFO L276 IsEmpty]: Start isEmpty. Operand 53117 states and 61479 transitions. [2022-07-22 11:26:05,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-07-22 11:26:05,871 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:05,872 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:05,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 11:26:05,872 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:05,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:05,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1319133343, now seen corresponding path program 1 times [2022-07-22 11:26:05,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:05,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072648748] [2022-07-22 11:26:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:05,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 161 proven. 40 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 11:26:06,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:06,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072648748] [2022-07-22 11:26:06,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072648748] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:26:06,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214904817] [2022-07-22 11:26:06,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:06,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:06,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:26:06,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:26:06,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 11:26:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:06,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:26:06,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:26:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-22 11:26:06,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:26:06,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214904817] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:06,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:26:06,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-22 11:26:06,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412072941] [2022-07-22 11:26:06,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:06,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:06,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:06,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:06,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:06,285 INFO L87 Difference]: Start difference. First operand 53117 states and 61479 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:07,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:07,115 INFO L93 Difference]: Finished difference Result 112317 states and 131591 transitions. [2022-07-22 11:26:07,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:07,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 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 314 [2022-07-22 11:26:07,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:07,192 INFO L225 Difference]: With dead ends: 112317 [2022-07-22 11:26:07,193 INFO L226 Difference]: Without dead ends: 60829 [2022-07-22 11:26:07,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:07,232 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 219 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:07,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 136 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:26:07,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60829 states. [2022-07-22 11:26:07,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60829 to 60214. [2022-07-22 11:26:07,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60214 states, 60213 states have (on average 1.1382757876206135) internal successors, (68539), 60213 states have internal predecessors, (68539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:08,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60214 states to 60214 states and 68539 transitions. [2022-07-22 11:26:08,035 INFO L78 Accepts]: Start accepts. Automaton has 60214 states and 68539 transitions. Word has length 314 [2022-07-22 11:26:08,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:08,036 INFO L495 AbstractCegarLoop]: Abstraction has 60214 states and 68539 transitions. [2022-07-22 11:26:08,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:08,036 INFO L276 IsEmpty]: Start isEmpty. Operand 60214 states and 68539 transitions. [2022-07-22 11:26:08,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-07-22 11:26:08,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:08,065 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:08,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 11:26:08,267 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,SelfDestructingSolverStorable14 [2022-07-22 11:26:08,267 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:08,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:08,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1430238184, now seen corresponding path program 1 times [2022-07-22 11:26:08,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:08,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979582040] [2022-07-22 11:26:08,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:08,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-22 11:26:08,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:08,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979582040] [2022-07-22 11:26:08,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979582040] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:08,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:08,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:26:08,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278609601] [2022-07-22 11:26:08,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:08,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:08,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:08,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:08,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:08,367 INFO L87 Difference]: Start difference. First operand 60214 states and 68539 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 2 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:09,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:09,300 INFO L93 Difference]: Finished difference Result 118200 states and 134614 transitions. [2022-07-22 11:26:09,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:09,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 2 states have internal predecessors, (245), 0 states have call successors, (0), 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 340 [2022-07-22 11:26:09,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:09,378 INFO L225 Difference]: With dead ends: 118200 [2022-07-22 11:26:09,378 INFO L226 Difference]: Without dead ends: 70598 [2022-07-22 11:26:09,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:09,403 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 165 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:09,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 167 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:26:09,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70598 states. [2022-07-22 11:26:10,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70598 to 70390. [2022-07-22 11:26:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70390 states, 70389 states have (on average 1.1318387816278113) internal successors, (79669), 70389 states have internal predecessors, (79669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:10,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70390 states to 70390 states and 79669 transitions. [2022-07-22 11:26:10,359 INFO L78 Accepts]: Start accepts. Automaton has 70390 states and 79669 transitions. Word has length 340 [2022-07-22 11:26:10,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:10,359 INFO L495 AbstractCegarLoop]: Abstraction has 70390 states and 79669 transitions. [2022-07-22 11:26:10,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 2 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:10,360 INFO L276 IsEmpty]: Start isEmpty. Operand 70390 states and 79669 transitions. [2022-07-22 11:26:10,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-07-22 11:26:10,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:10,389 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:10,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 11:26:10,390 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:10,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:10,390 INFO L85 PathProgramCache]: Analyzing trace with hash -217590253, now seen corresponding path program 1 times [2022-07-22 11:26:10,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:10,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409006665] [2022-07-22 11:26:10,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:10,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 177 proven. 6 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-22 11:26:10,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:10,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409006665] [2022-07-22 11:26:10,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409006665] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:26:10,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544060300] [2022-07-22 11:26:10,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:10,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:10,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:26:10,507 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:26:10,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 11:26:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:10,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:26:10,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:26:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-22 11:26:10,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:26:10,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544060300] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:10,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:26:10,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-22 11:26:10,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717937774] [2022-07-22 11:26:10,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:10,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:10,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:10,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:10,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:10,771 INFO L87 Difference]: Start difference. First operand 70390 states and 79669 transitions. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 2 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:11,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:11,596 INFO L93 Difference]: Finished difference Result 134677 states and 152522 transitions. [2022-07-22 11:26:11,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:11,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 2 states have internal predecessors, (308), 0 states have call successors, (0), 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 346 [2022-07-22 11:26:11,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:11,676 INFO L225 Difference]: With dead ends: 134677 [2022-07-22 11:26:11,676 INFO L226 Difference]: Without dead ends: 66322 [2022-07-22 11:26:11,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:11,717 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 125 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:11,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 93 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:26:11,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66322 states. [2022-07-22 11:26:12,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66322 to 64492. [2022-07-22 11:26:12,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64492 states, 64491 states have (on average 1.1141399575134514) internal successors, (71852), 64491 states have internal predecessors, (71852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:12,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64492 states to 64492 states and 71852 transitions. [2022-07-22 11:26:12,608 INFO L78 Accepts]: Start accepts. Automaton has 64492 states and 71852 transitions. Word has length 346 [2022-07-22 11:26:12,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:12,608 INFO L495 AbstractCegarLoop]: Abstraction has 64492 states and 71852 transitions. [2022-07-22 11:26:12,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 2 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:12,609 INFO L276 IsEmpty]: Start isEmpty. Operand 64492 states and 71852 transitions. [2022-07-22 11:26:12,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-07-22 11:26:12,642 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:12,642 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:12,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 11:26:12,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:12,856 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:12,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1090382013, now seen corresponding path program 1 times [2022-07-22 11:26:12,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:12,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277651580] [2022-07-22 11:26:12,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:12,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-22 11:26:12,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:12,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277651580] [2022-07-22 11:26:12,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277651580] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:12,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:12,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:26:12,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468237586] [2022-07-22 11:26:12,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:12,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:26:12,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:12,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:26:12,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:26:12,976 INFO L87 Difference]: Start difference. First operand 64492 states and 71852 transitions. Second operand has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:14,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:14,060 INFO L93 Difference]: Finished difference Result 132040 states and 147469 transitions. [2022-07-22 11:26:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:26:14,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 347 [2022-07-22 11:26:14,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:14,131 INFO L225 Difference]: With dead ends: 132040 [2022-07-22 11:26:14,131 INFO L226 Difference]: Without dead ends: 69177 [2022-07-22 11:26:14,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:26:14,163 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 559 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:14,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 132 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:26:14,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69177 states. [2022-07-22 11:26:14,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69177 to 68560. [2022-07-22 11:26:14,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68560 states, 68559 states have (on average 1.1061129829781648) internal successors, (75834), 68559 states have internal predecessors, (75834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:14,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68560 states to 68560 states and 75834 transitions. [2022-07-22 11:26:14,916 INFO L78 Accepts]: Start accepts. Automaton has 68560 states and 75834 transitions. Word has length 347 [2022-07-22 11:26:14,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:14,916 INFO L495 AbstractCegarLoop]: Abstraction has 68560 states and 75834 transitions. [2022-07-22 11:26:14,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:14,917 INFO L276 IsEmpty]: Start isEmpty. Operand 68560 states and 75834 transitions. [2022-07-22 11:26:15,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2022-07-22 11:26:15,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:15,127 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:15,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 11:26:15,128 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:15,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:15,128 INFO L85 PathProgramCache]: Analyzing trace with hash -246837986, now seen corresponding path program 1 times [2022-07-22 11:26:15,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:15,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144183412] [2022-07-22 11:26:15,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:15,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:15,231 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 180 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-22 11:26:15,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:15,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144183412] [2022-07-22 11:26:15,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144183412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:26:15,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633624931] [2022-07-22 11:26:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:15,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:15,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:26:15,233 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:26:15,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 11:26:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:15,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:26:15,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:26:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-22 11:26:15,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:26:15,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633624931] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:15,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:26:15,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-22 11:26:15,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588698648] [2022-07-22 11:26:15,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:15,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:15,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:15,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:15,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:15,494 INFO L87 Difference]: Start difference. First operand 68560 states and 75834 transitions. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 2 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:16,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:16,166 INFO L93 Difference]: Finished difference Result 182685 states and 201816 transitions. [2022-07-22 11:26:16,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:16,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 2 states have internal predecessors, (305), 0 states have call successors, (0), 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 349 [2022-07-22 11:26:16,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:16,307 INFO L225 Difference]: With dead ends: 182685 [2022-07-22 11:26:16,307 INFO L226 Difference]: Without dead ends: 116160 [2022-07-22 11:26:16,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:26:16,339 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 205 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:16,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 516 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:26:16,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116160 states. [2022-07-22 11:26:17,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116160 to 116146. [2022-07-22 11:26:17,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116146 states, 116145 states have (on average 1.102699212191657) internal successors, (128073), 116145 states have internal predecessors, (128073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:17,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116146 states to 116146 states and 128073 transitions. [2022-07-22 11:26:17,775 INFO L78 Accepts]: Start accepts. Automaton has 116146 states and 128073 transitions. Word has length 349 [2022-07-22 11:26:17,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:17,775 INFO L495 AbstractCegarLoop]: Abstraction has 116146 states and 128073 transitions. [2022-07-22 11:26:17,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 2 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:17,775 INFO L276 IsEmpty]: Start isEmpty. Operand 116146 states and 128073 transitions. [2022-07-22 11:26:17,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-07-22 11:26:17,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:17,794 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:17,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 11:26:18,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:18,008 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:18,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:18,008 INFO L85 PathProgramCache]: Analyzing trace with hash 112980587, now seen corresponding path program 1 times [2022-07-22 11:26:18,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:18,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370233685] [2022-07-22 11:26:18,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:18,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 11:26:18,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:18,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370233685] [2022-07-22 11:26:18,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370233685] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:18,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:26:18,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:26:18,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770317286] [2022-07-22 11:26:18,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:18,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:18,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:18,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:18,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:18,139 INFO L87 Difference]: Start difference. First operand 116146 states and 128073 transitions. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:19,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:19,268 INFO L93 Difference]: Finished difference Result 218850 states and 240626 transitions. [2022-07-22 11:26:19,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:19,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 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 351 [2022-07-22 11:26:19,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:19,397 INFO L225 Difference]: With dead ends: 218850 [2022-07-22 11:26:19,398 INFO L226 Difference]: Without dead ends: 102909 [2022-07-22 11:26:19,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:26:19,462 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 219 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:19,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 307 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:26:19,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102909 states. [2022-07-22 11:26:20,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102909 to 88488. [2022-07-22 11:26:20,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88488 states, 88487 states have (on average 1.0721235887757523) internal successors, (94869), 88487 states have internal predecessors, (94869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:20,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88488 states to 88488 states and 94869 transitions. [2022-07-22 11:26:20,874 INFO L78 Accepts]: Start accepts. Automaton has 88488 states and 94869 transitions. Word has length 351 [2022-07-22 11:26:20,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:20,874 INFO L495 AbstractCegarLoop]: Abstraction has 88488 states and 94869 transitions. [2022-07-22 11:26:20,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:20,874 INFO L276 IsEmpty]: Start isEmpty. Operand 88488 states and 94869 transitions. [2022-07-22 11:26:20,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2022-07-22 11:26:20,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:20,904 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:20,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 11:26:20,904 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:20,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:20,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1300402637, now seen corresponding path program 1 times [2022-07-22 11:26:20,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:20,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037923225] [2022-07-22 11:26:20,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:20,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 325 proven. 9 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-07-22 11:26:21,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:21,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037923225] [2022-07-22 11:26:21,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037923225] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:26:21,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823731100] [2022-07-22 11:26:21,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:21,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:21,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:26:21,041 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:26:21,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 11:26:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:21,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:26:21,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:26:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 458 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-22 11:26:21,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:26:21,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823731100] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:21,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:26:21,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-22 11:26:21,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730625812] [2022-07-22 11:26:21,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:21,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:21,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:21,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:21,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:26:21,369 INFO L87 Difference]: Start difference. First operand 88488 states and 94869 transitions. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:22,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:22,246 INFO L93 Difference]: Finished difference Result 171292 states and 183817 transitions. [2022-07-22 11:26:22,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:22,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 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 473 [2022-07-22 11:26:22,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:22,339 INFO L225 Difference]: With dead ends: 171292 [2022-07-22 11:26:22,339 INFO L226 Difference]: Without dead ends: 88494 [2022-07-22 11:26:22,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:26:22,378 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 156 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:22,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 275 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:26:22,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88494 states. [2022-07-22 11:26:23,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88494 to 88488. [2022-07-22 11:26:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88488 states, 88487 states have (on average 1.0709256726976843) internal successors, (94763), 88487 states have internal predecessors, (94763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:23,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88488 states to 88488 states and 94763 transitions. [2022-07-22 11:26:23,418 INFO L78 Accepts]: Start accepts. Automaton has 88488 states and 94763 transitions. Word has length 473 [2022-07-22 11:26:23,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:23,418 INFO L495 AbstractCegarLoop]: Abstraction has 88488 states and 94763 transitions. [2022-07-22 11:26:23,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:23,418 INFO L276 IsEmpty]: Start isEmpty. Operand 88488 states and 94763 transitions. [2022-07-22 11:26:23,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2022-07-22 11:26:23,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:26:23,700 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:26:23,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 11:26:23,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:23,918 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:26:23,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:26:23,919 INFO L85 PathProgramCache]: Analyzing trace with hash -6797228, now seen corresponding path program 1 times [2022-07-22 11:26:23,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:26:23,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236058888] [2022-07-22 11:26:23,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:23,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:26:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 411 proven. 9 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-07-22 11:26:24,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:26:24,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236058888] [2022-07-22 11:26:24,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236058888] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:26:24,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792126030] [2022-07-22 11:26:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:26:24,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:24,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:26:24,091 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:26:24,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 11:26:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:26:24,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:26:24,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:26:24,609 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 510 proven. 0 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-07-22 11:26:24,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:26:24,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792126030] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:26:24,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:26:24,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-22 11:26:24,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287036039] [2022-07-22 11:26:24,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:26:24,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:26:24,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:26:24,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:26:24,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:26:24,611 INFO L87 Difference]: Start difference. First operand 88488 states and 94763 transitions. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:25,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:26:25,389 INFO L93 Difference]: Finished difference Result 174944 states and 187361 transitions. [2022-07-22 11:26:25,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:26:25,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 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 549 [2022-07-22 11:26:25,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:26:25,391 INFO L225 Difference]: With dead ends: 174944 [2022-07-22 11:26:25,391 INFO L226 Difference]: Without dead ends: 0 [2022-07-22 11:26:25,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 548 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:26:25,452 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 89 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:26:25,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 54 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:26:25,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-22 11:26:25,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-22 11:26:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:25,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-22 11:26:25,453 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 549 [2022-07-22 11:26:25,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:26:25,453 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 11:26:25,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:26:25,453 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-22 11:26:25,453 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-22 11:26:25,455 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-22 11:26:25,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 11:26:25,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:26:25,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.