./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label12.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_label12.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 8d17ef4c86a3b9aaad0f3756316af6b356203f50f5a16d9fd49cf45964daad71 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 11:24:20,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:24:20,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:24:20,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:24:20,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:24:20,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:24:20,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:24:20,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:24:21,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:24:21,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:24:21,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:24:21,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:24:21,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:24:21,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:24:21,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:24:21,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:24:21,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:24:21,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:24:21,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:24:21,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:24:21,009 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:24:21,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:24:21,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:24:21,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:24:21,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:24:21,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 11:24:21,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 11:24:21,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 11:24:21,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 11:24:21,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 11:24:21,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 11:24:21,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 11:24:21,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 11:24:21,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 11:24:21,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 11:24:21,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 11:24:21,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 11:24:21,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 11:24:21,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 11:24:21,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:24:21,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:24:21,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:24:21,025 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 11:24:21,043 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:24:21,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:24:21,044 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:24:21,044 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:24:21,045 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 11:24:21,045 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 11:24:21,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:24:21,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:24:21,046 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:24:21,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:24:21,046 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:24:21,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 11:24:21,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:24:21,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:24:21,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 11:24:21,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 11:24:21,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 11:24:21,047 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:24:21,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:24:21,047 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:24:21,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 11:24:21,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:24:21,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:24:21,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 11:24:21,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:24:21,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:24:21,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 11:24:21,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 11:24:21,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 11:24:21,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 11:24:21,049 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:24:21,049 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 11:24:21,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 11:24:21,049 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d17ef4c86a3b9aaad0f3756316af6b356203f50f5a16d9fd49cf45964daad71 [2022-07-22 11:24:21,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:24:21,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:24:21,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:24:21,265 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:24:21,267 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:24:21,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label12.c [2022-07-22 11:24:21,329 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9155c68e3/def94e84445a4d79be66b9ed54336eee/FLAG29c08502f [2022-07-22 11:24:21,775 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:24:21,776 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label12.c [2022-07-22 11:24:21,788 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9155c68e3/def94e84445a4d79be66b9ed54336eee/FLAG29c08502f [2022-07-22 11:24:22,089 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9155c68e3/def94e84445a4d79be66b9ed54336eee [2022-07-22 11:24:22,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:24:22,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:24:22,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:24:22,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:24:22,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:24:22,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:24:22" (1/1) ... [2022-07-22 11:24:22,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ae1c00c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:24:22, skipping insertion in model container [2022-07-22 11:24:22,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:24:22" (1/1) ... [2022-07-22 11:24:22,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:24:22,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:24:22,679 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_label12.c[56222,56235] [2022-07-22 11:24:22,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:24:22,720 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:24:22,851 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_label12.c[56222,56235] [2022-07-22 11:24:22,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:24:22,873 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:24:22,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:24:22 WrapperNode [2022-07-22 11:24:22,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:24:22,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:24:22,875 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:24:22,875 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:24:22,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:24:22" (1/1) ... [2022-07-22 11:24:22,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:24:22" (1/1) ... [2022-07-22 11:24:22,968 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-07-22 11:24:22,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:24:22,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:24:22,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:24:22,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:24:22,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:24:22" (1/1) ... [2022-07-22 11:24:22,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:24:22" (1/1) ... [2022-07-22 11:24:22,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:24:22" (1/1) ... [2022-07-22 11:24:22,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:24:22" (1/1) ... [2022-07-22 11:24:23,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:24:22" (1/1) ... [2022-07-22 11:24:23,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:24:22" (1/1) ... [2022-07-22 11:24:23,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:24:22" (1/1) ... [2022-07-22 11:24:23,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:24:23,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:24:23,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:24:23,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:24:23,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:24:22" (1/1) ... [2022-07-22 11:24:23,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:24:23,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:24:23,086 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 11:24:23,115 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 11:24:23,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:24:23,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 11:24:23,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:24:23,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:24:23,180 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:24:23,181 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:24:24,213 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:24:24,220 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:24:24,220 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 11:24:24,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:24:24 BoogieIcfgContainer [2022-07-22 11:24:24,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:24:24,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:24:24,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:24:24,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:24:24,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:24:22" (1/3) ... [2022-07-22 11:24:24,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@343ad248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:24:24, skipping insertion in model container [2022-07-22 11:24:24,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:24:22" (2/3) ... [2022-07-22 11:24:24,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@343ad248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:24:24, skipping insertion in model container [2022-07-22 11:24:24,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:24:24" (3/3) ... [2022-07-22 11:24:24,227 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label12.c [2022-07-22 11:24:24,236 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:24:24,236 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:24:24,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:24:24,272 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@119dd9f6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@27b18ea [2022-07-22 11:24:24,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:24:24,276 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 11:24:24,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-22 11:24:24,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:24:24,287 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] [2022-07-22 11:24:24,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:24:24,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:24:24,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1237142429, now seen corresponding path program 1 times [2022-07-22 11:24:24,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:24:24,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747775529] [2022-07-22 11:24:24,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:24,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:24:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:24,602 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 11:24:24,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:24:24,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747775529] [2022-07-22 11:24:24,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747775529] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:24:24,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:24:24,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:24:24,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195951198] [2022-07-22 11:24:24,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:24:24,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:24:24,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:24:24,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:24:24,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:24:24,646 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 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:24:25,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:24:25,398 INFO L93 Difference]: Finished difference Result 835 states and 1478 transitions. [2022-07-22 11:24:25,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:24:25,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-07-22 11:24:25,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:24:25,416 INFO L225 Difference]: With dead ends: 835 [2022-07-22 11:24:25,417 INFO L226 Difference]: Without dead ends: 456 [2022-07-22 11:24:25,421 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 11:24:25,424 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 125 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:24:25,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 161 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:24:25,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-07-22 11:24:25,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 451. [2022-07-22 11:24:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5622222222222222) internal successors, (703), 450 states have internal predecessors, (703), 0 states have call successors, (0), 0 states 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 11:24:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 703 transitions. [2022-07-22 11:24:25,462 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 703 transitions. Word has length 163 [2022-07-22 11:24:25,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:24:25,463 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 703 transitions. [2022-07-22 11:24:25,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:24:25,463 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 703 transitions. [2022-07-22 11:24:25,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-22 11:24:25,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:24:25,466 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:24:25,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 11:24:25,467 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:24:25,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:24:25,467 INFO L85 PathProgramCache]: Analyzing trace with hash -23109611, now seen corresponding path program 1 times [2022-07-22 11:24:25,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:24:25,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764227874] [2022-07-22 11:24:25,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:25,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:24:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:24:25,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:24:25,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764227874] [2022-07-22 11:24:25,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764227874] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:24:25,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:24:25,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:24:25,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953456225] [2022-07-22 11:24:25,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:24:25,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:24:25,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:24:25,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:24:25,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:24:25,541 INFO L87 Difference]: Start difference. First operand 451 states and 703 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states 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 11:24:26,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:24:26,185 INFO L93 Difference]: Finished difference Result 1340 states and 2094 transitions. [2022-07-22 11:24:26,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:24:26,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 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 169 [2022-07-22 11:24:26,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:24:26,204 INFO L225 Difference]: With dead ends: 1340 [2022-07-22 11:24:26,204 INFO L226 Difference]: Without dead ends: 891 [2022-07-22 11:24:26,205 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 11:24:26,206 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:24:26,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 154 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:24:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-07-22 11:24:26,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 887. [2022-07-22 11:24:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 1.5474040632054176) internal successors, (1371), 886 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states 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 11:24:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1371 transitions. [2022-07-22 11:24:26,235 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1371 transitions. Word has length 169 [2022-07-22 11:24:26,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:24:26,235 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1371 transitions. [2022-07-22 11:24:26,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states 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 11:24:26,236 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1371 transitions. [2022-07-22 11:24:26,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-07-22 11:24:26,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:24:26,244 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:24:26,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 11:24:26,244 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:24:26,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:24:26,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1333876663, now seen corresponding path program 1 times [2022-07-22 11:24:26,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:24:26,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048160149] [2022-07-22 11:24:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:26,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:24:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:24:26,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:24:26,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048160149] [2022-07-22 11:24:26,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048160149] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:24:26,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:24:26,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:24:26,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542099823] [2022-07-22 11:24:26,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:24:26,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:24:26,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:24:26,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:24:26,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:24:26,311 INFO L87 Difference]: Start difference. First operand 887 states and 1371 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:24:26,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:24:26,950 INFO L93 Difference]: Finished difference Result 2612 states and 4042 transitions. [2022-07-22 11:24:26,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:24:26,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2022-07-22 11:24:26,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:24:26,955 INFO L225 Difference]: With dead ends: 2612 [2022-07-22 11:24:26,955 INFO L226 Difference]: Without dead ends: 1727 [2022-07-22 11:24:26,956 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 11:24:26,957 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 236 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:24:26,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 112 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:24:26,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-07-22 11:24:26,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1725. [2022-07-22 11:24:26,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 1.472737819025522) internal successors, (2539), 1724 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states 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 11:24:26,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2539 transitions. [2022-07-22 11:24:26,982 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2539 transitions. Word has length 173 [2022-07-22 11:24:26,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:24:26,983 INFO L495 AbstractCegarLoop]: Abstraction has 1725 states and 2539 transitions. [2022-07-22 11:24:26,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:24:26,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2539 transitions. [2022-07-22 11:24:26,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-22 11:24:26,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:24:26,986 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-07-22 11:24:26,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 11:24:26,986 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:24:26,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:24:26,987 INFO L85 PathProgramCache]: Analyzing trace with hash -649474255, now seen corresponding path program 1 times [2022-07-22 11:24:26,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:24:26,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988766868] [2022-07-22 11:24:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:26,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:24:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 11:24:27,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:24:27,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988766868] [2022-07-22 11:24:27,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988766868] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:24:27,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:24:27,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:24:27,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215524545] [2022-07-22 11:24:27,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:24:27,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:24:27,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:24:27,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:24:27,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:24:27,035 INFO L87 Difference]: Start difference. First operand 1725 states and 2539 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:24:27,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:24:27,613 INFO L93 Difference]: Finished difference Result 5073 states and 7473 transitions. [2022-07-22 11:24:27,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:24:27,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2022-07-22 11:24:27,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:24:27,622 INFO L225 Difference]: With dead ends: 5073 [2022-07-22 11:24:27,622 INFO L226 Difference]: Without dead ends: 3350 [2022-07-22 11:24:27,625 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 11:24:27,630 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 214 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:24:27,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 194 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:24:27,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2022-07-22 11:24:27,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 3350. [2022-07-22 11:24:27,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3349 states have (on average 1.3114362496267542) internal successors, (4392), 3349 states have internal predecessors, (4392), 0 states have call successors, (0), 0 states 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 11:24:27,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 4392 transitions. [2022-07-22 11:24:27,675 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 4392 transitions. Word has length 175 [2022-07-22 11:24:27,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:24:27,675 INFO L495 AbstractCegarLoop]: Abstraction has 3350 states and 4392 transitions. [2022-07-22 11:24:27,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:24:27,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 4392 transitions. [2022-07-22 11:24:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-22 11:24:27,679 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:24:27,679 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:24:27,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 11:24:27,681 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:24:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:24:27,682 INFO L85 PathProgramCache]: Analyzing trace with hash -281310709, now seen corresponding path program 1 times [2022-07-22 11:24:27,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:24:27,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300384975] [2022-07-22 11:24:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:27,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:24:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 11:24:27,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:24:27,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300384975] [2022-07-22 11:24:27,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300384975] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:24:27,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:24:27,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:24:27,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79545813] [2022-07-22 11:24:27,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:24:27,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:24:27,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:24:27,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:24:27,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:24:27,773 INFO L87 Difference]: Start difference. First operand 3350 states and 4392 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 11:24:28,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:24:28,435 INFO L93 Difference]: Finished difference Result 9360 states and 12381 transitions. [2022-07-22 11:24:28,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:24:28,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 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 184 [2022-07-22 11:24:28,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:24:28,452 INFO L225 Difference]: With dead ends: 9360 [2022-07-22 11:24:28,453 INFO L226 Difference]: Without dead ends: 6012 [2022-07-22 11:24:28,473 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 11:24:28,474 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 216 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:24:28,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 391 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:24:28,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2022-07-22 11:24:28,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 6006. [2022-07-22 11:24:28,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6006 states, 6005 states have (on average 1.2502914238134888) internal successors, (7508), 6005 states have internal predecessors, (7508), 0 states have call successors, (0), 0 states 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 11:24:28,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6006 states to 6006 states and 7508 transitions. [2022-07-22 11:24:28,682 INFO L78 Accepts]: Start accepts. Automaton has 6006 states and 7508 transitions. Word has length 184 [2022-07-22 11:24:28,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:24:28,683 INFO L495 AbstractCegarLoop]: Abstraction has 6006 states and 7508 transitions. [2022-07-22 11:24:28,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 11:24:28,686 INFO L276 IsEmpty]: Start isEmpty. Operand 6006 states and 7508 transitions. [2022-07-22 11:24:28,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-07-22 11:24:28,693 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:24:28,693 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:24:28,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 11:24:28,708 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:24:28,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:24:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash -319235317, now seen corresponding path program 1 times [2022-07-22 11:24:28,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:24:28,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032841576] [2022-07-22 11:24:28,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:28,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:24:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-22 11:24:28,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:24:28,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032841576] [2022-07-22 11:24:28,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032841576] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:24:28,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:24:28,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:24:28,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662454783] [2022-07-22 11:24:28,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:24:28,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:24:28,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:24:28,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:24:28,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:24:28,823 INFO L87 Difference]: Start difference. First operand 6006 states and 7508 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:24:29,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:24:29,603 INFO L93 Difference]: Finished difference Result 17144 states and 21528 transitions. [2022-07-22 11:24:29,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:24:29,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2022-07-22 11:24:29,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:24:29,633 INFO L225 Difference]: With dead ends: 17144 [2022-07-22 11:24:29,634 INFO L226 Difference]: Without dead ends: 11140 [2022-07-22 11:24:29,639 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 11:24:29,640 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 219 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:24:29,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 176 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:24:29,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11140 states. [2022-07-22 11:24:29,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11140 to 11125. [2022-07-22 11:24:29,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11125 states, 11124 states have (on average 1.2303128371089536) internal successors, (13686), 11124 states have internal predecessors, (13686), 0 states have call successors, (0), 0 states 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 11:24:29,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11125 states to 11125 states and 13686 transitions. [2022-07-22 11:24:29,792 INFO L78 Accepts]: Start accepts. Automaton has 11125 states and 13686 transitions. Word has length 203 [2022-07-22 11:24:29,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:24:29,792 INFO L495 AbstractCegarLoop]: Abstraction has 11125 states and 13686 transitions. [2022-07-22 11:24:29,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:24:29,793 INFO L276 IsEmpty]: Start isEmpty. Operand 11125 states and 13686 transitions. [2022-07-22 11:24:29,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-07-22 11:24:29,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:24:29,806 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:24:29,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 11:24:29,807 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:24:29,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:24:29,807 INFO L85 PathProgramCache]: Analyzing trace with hash 817393068, now seen corresponding path program 1 times [2022-07-22 11:24:29,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:24:29,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33112491] [2022-07-22 11:24:29,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:29,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:24:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 11:24:29,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:24:29,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33112491] [2022-07-22 11:24:29,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33112491] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:24:29,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911773940] [2022-07-22 11:24:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:29,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:24:29,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:24:29,908 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 11:24:29,948 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 11:24:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:30,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:24:30,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:24:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-22 11:24:30,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:24:30,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911773940] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:24:30,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:24:30,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-22 11:24:30,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066517222] [2022-07-22 11:24:30,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:24:30,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:24:30,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:24:30,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:24:30,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:24:30,434 INFO L87 Difference]: Start difference. First operand 11125 states and 13686 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 11:24:31,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:24:31,075 INFO L93 Difference]: Finished difference Result 31061 states and 38427 transitions. [2022-07-22 11:24:31,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:24:31,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 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 211 [2022-07-22 11:24:31,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:24:31,125 INFO L225 Difference]: With dead ends: 31061 [2022-07-22 11:24:31,126 INFO L226 Difference]: Without dead ends: 19938 [2022-07-22 11:24:31,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 210 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 11:24:31,139 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 97 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:24:31,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 164 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:24:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19938 states. [2022-07-22 11:24:31,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19938 to 19934. [2022-07-22 11:24:31,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19934 states, 19933 states have (on average 1.213465108112176) internal successors, (24188), 19933 states have internal predecessors, (24188), 0 states have call successors, (0), 0 states 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 11:24:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19934 states to 19934 states and 24188 transitions. [2022-07-22 11:24:31,445 INFO L78 Accepts]: Start accepts. Automaton has 19934 states and 24188 transitions. Word has length 211 [2022-07-22 11:24:31,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:24:31,446 INFO L495 AbstractCegarLoop]: Abstraction has 19934 states and 24188 transitions. [2022-07-22 11:24:31,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 11:24:31,446 INFO L276 IsEmpty]: Start isEmpty. Operand 19934 states and 24188 transitions. [2022-07-22 11:24:31,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-07-22 11:24:31,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:24:31,465 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] [2022-07-22 11:24:31,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 11:24:31,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:24:31,685 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:24:31,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:24:31,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2037132949, now seen corresponding path program 1 times [2022-07-22 11:24:31,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:24:31,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595757702] [2022-07-22 11:24:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:31,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:24:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:31,778 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 11:24:31,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:24:31,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595757702] [2022-07-22 11:24:31,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595757702] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:24:31,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907790170] [2022-07-22 11:24:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:31,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:24:31,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:24:31,796 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 11:24:31,797 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 11:24:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:31,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:24:31,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:24:32,075 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 11:24:32,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:24:32,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907790170] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:24:32,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:24:32,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-22 11:24:32,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320882975] [2022-07-22 11:24:32,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:24:32,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:24:32,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:24:32,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:24:32,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:24:32,078 INFO L87 Difference]: Start difference. First operand 19934 states and 24188 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states 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 11:24:32,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:24:32,793 INFO L93 Difference]: Finished difference Result 46444 states and 56958 transitions. [2022-07-22 11:24:32,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:24:32,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 214 [2022-07-22 11:24:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:24:32,835 INFO L225 Difference]: With dead ends: 46444 [2022-07-22 11:24:32,836 INFO L226 Difference]: Without dead ends: 26512 [2022-07-22 11:24:32,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 213 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 11:24:32,860 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 75 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:24:32,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 385 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:24:32,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26512 states. [2022-07-22 11:24:33,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26512 to 26446. [2022-07-22 11:24:33,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26446 states, 26445 states have (on average 1.2237095859330687) internal successors, (32361), 26445 states have internal predecessors, (32361), 0 states have call successors, (0), 0 states 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 11:24:33,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26446 states to 26446 states and 32361 transitions. [2022-07-22 11:24:33,256 INFO L78 Accepts]: Start accepts. Automaton has 26446 states and 32361 transitions. Word has length 214 [2022-07-22 11:24:33,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:24:33,256 INFO L495 AbstractCegarLoop]: Abstraction has 26446 states and 32361 transitions. [2022-07-22 11:24:33,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states 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 11:24:33,256 INFO L276 IsEmpty]: Start isEmpty. Operand 26446 states and 32361 transitions. [2022-07-22 11:24:33,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-07-22 11:24:33,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:24:33,281 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2022-07-22 11:24:33,300 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 11:24:33,495 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,SelfDestructingSolverStorable7 [2022-07-22 11:24:33,496 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:24:33,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:24:33,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1243125533, now seen corresponding path program 1 times [2022-07-22 11:24:33,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:24:33,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792290427] [2022-07-22 11:24:33,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:33,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:24:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 63 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 11:24:33,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:24:33,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792290427] [2022-07-22 11:24:33,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792290427] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:24:33,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433385348] [2022-07-22 11:24:33,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:33,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:24:33,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:24:33,647 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 11:24:33,671 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 11:24:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:33,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:24:33,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:24:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 11:24:33,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:24:33,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433385348] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:24:33,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:24:33,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-22 11:24:33,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221637637] [2022-07-22 11:24:33,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:24:33,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:24:33,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:24:33,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:24:33,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:24:33,795 INFO L87 Difference]: Start difference. First operand 26446 states and 32361 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 11:24:34,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:24:34,579 INFO L93 Difference]: Finished difference Result 70805 states and 87019 transitions. [2022-07-22 11:24:34,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:24:34,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 220 [2022-07-22 11:24:34,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:24:34,649 INFO L225 Difference]: With dead ends: 70805 [2022-07-22 11:24:34,649 INFO L226 Difference]: Without dead ends: 44361 [2022-07-22 11:24:34,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 219 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 11:24:34,674 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 252 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:24:34,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 194 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:24:34,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44361 states. [2022-07-22 11:24:35,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44361 to 44353. [2022-07-22 11:24:35,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44353 states, 44352 states have (on average 1.203553391053391) internal successors, (53380), 44352 states have internal predecessors, (53380), 0 states have call successors, (0), 0 states 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 11:24:35,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44353 states to 44353 states and 53380 transitions. [2022-07-22 11:24:35,270 INFO L78 Accepts]: Start accepts. Automaton has 44353 states and 53380 transitions. Word has length 220 [2022-07-22 11:24:35,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:24:35,271 INFO L495 AbstractCegarLoop]: Abstraction has 44353 states and 53380 transitions. [2022-07-22 11:24:35,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 11:24:35,271 INFO L276 IsEmpty]: Start isEmpty. Operand 44353 states and 53380 transitions. [2022-07-22 11:24:35,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-07-22 11:24:35,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:24:35,302 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:24:35,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 11:24:35,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:24:35,516 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:24:35,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:24:35,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1635882939, now seen corresponding path program 1 times [2022-07-22 11:24:35,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:24:35,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543430273] [2022-07-22 11:24:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:35,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:24:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 11:24:35,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:24:35,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543430273] [2022-07-22 11:24:35,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543430273] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:24:35,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:24:35,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:24:35,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057029931] [2022-07-22 11:24:35,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:24:35,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:24:35,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:24:35,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:24:35,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:24:35,627 INFO L87 Difference]: Start difference. First operand 44353 states and 53380 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:24:36,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:24:36,657 INFO L93 Difference]: Finished difference Result 101359 states and 122628 transitions. [2022-07-22 11:24:36,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:24:36,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2022-07-22 11:24:36,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:24:36,737 INFO L225 Difference]: With dead ends: 101359 [2022-07-22 11:24:36,737 INFO L226 Difference]: Without dead ends: 57414 [2022-07-22 11:24:36,770 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 11:24:36,771 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 173 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:24:36,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 390 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:24:36,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57414 states. [2022-07-22 11:24:37,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57414 to 57140. [2022-07-22 11:24:37,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57140 states, 57139 states have (on average 1.1763419030784579) internal successors, (67215), 57139 states have internal predecessors, (67215), 0 states have call successors, (0), 0 states 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 11:24:37,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57140 states to 57140 states and 67215 transitions. [2022-07-22 11:24:37,680 INFO L78 Accepts]: Start accepts. Automaton has 57140 states and 67215 transitions. Word has length 232 [2022-07-22 11:24:37,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:24:37,681 INFO L495 AbstractCegarLoop]: Abstraction has 57140 states and 67215 transitions. [2022-07-22 11:24:37,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:24:37,681 INFO L276 IsEmpty]: Start isEmpty. Operand 57140 states and 67215 transitions. [2022-07-22 11:24:37,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-07-22 11:24:37,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:24:37,720 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-07-22 11:24:37,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 11:24:37,721 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:24:37,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:24:37,721 INFO L85 PathProgramCache]: Analyzing trace with hash -895747558, now seen corresponding path program 1 times [2022-07-22 11:24:37,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:24:37,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716365097] [2022-07-22 11:24:37,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:37,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:24:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 11:24:37,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:24:37,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716365097] [2022-07-22 11:24:37,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716365097] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:24:37,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:24:37,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:24:37,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853380874] [2022-07-22 11:24:37,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:24:37,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:24:37,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:24:37,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:24:37,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:24:37,810 INFO L87 Difference]: Start difference. First operand 57140 states and 67215 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states 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 11:24:38,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:24:38,935 INFO L93 Difference]: Finished difference Result 133485 states and 158266 transitions. [2022-07-22 11:24:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:24:38,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 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 244 [2022-07-22 11:24:38,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:24:39,059 INFO L225 Difference]: With dead ends: 133485 [2022-07-22 11:24:39,059 INFO L226 Difference]: Without dead ends: 76956 [2022-07-22 11:24:39,097 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 11:24:39,099 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 171 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:24:39,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 237 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:24:39,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76956 states. [2022-07-22 11:24:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76956 to 76881. [2022-07-22 11:24:40,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76881 states, 76880 states have (on average 1.189646201873049) internal successors, (91460), 76880 states have internal predecessors, (91460), 0 states have call successors, (0), 0 states 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 11:24:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76881 states to 76881 states and 91460 transitions. [2022-07-22 11:24:40,265 INFO L78 Accepts]: Start accepts. Automaton has 76881 states and 91460 transitions. Word has length 244 [2022-07-22 11:24:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:24:40,266 INFO L495 AbstractCegarLoop]: Abstraction has 76881 states and 91460 transitions. [2022-07-22 11:24:40,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states 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 11:24:40,283 INFO L276 IsEmpty]: Start isEmpty. Operand 76881 states and 91460 transitions. [2022-07-22 11:24:40,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-07-22 11:24:40,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:24:40,362 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 11:24:40,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 11:24:40,363 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:24:40,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:24:40,363 INFO L85 PathProgramCache]: Analyzing trace with hash 415824609, now seen corresponding path program 1 times [2022-07-22 11:24:40,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:24:40,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206917189] [2022-07-22 11:24:40,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:40,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:24:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 101 proven. 6 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-22 11:24:40,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:24:40,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206917189] [2022-07-22 11:24:40,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206917189] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:24:40,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757109564] [2022-07-22 11:24:40,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:40,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:24:40,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:24:40,479 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 11:24:40,519 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 11:24:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:40,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:24:40,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:24:40,635 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-22 11:24:40,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:24:40,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757109564] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:24:40,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:24:40,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-22 11:24:40,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802831064] [2022-07-22 11:24:40,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:24:40,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:24:40,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:24:40,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:24:40,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:24:40,638 INFO L87 Difference]: Start difference. First operand 76881 states and 91460 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:24:41,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:24:41,467 INFO L93 Difference]: Finished difference Result 199557 states and 237436 transitions. [2022-07-22 11:24:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:24:41,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 248 [2022-07-22 11:24:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:24:41,851 INFO L225 Difference]: With dead ends: 199557 [2022-07-22 11:24:41,851 INFO L226 Difference]: Without dead ends: 123693 [2022-07-22 11:24:41,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 247 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 11:24:41,912 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 303 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:24:41,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 913 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:24:41,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123693 states. [2022-07-22 11:24:43,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123693 to 123285. [2022-07-22 11:24:43,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123285 states, 123284 states have (on average 1.1730475974173453) internal successors, (144618), 123284 states have internal predecessors, (144618), 0 states have call successors, (0), 0 states 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 11:24:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123285 states to 123285 states and 144618 transitions. [2022-07-22 11:24:43,645 INFO L78 Accepts]: Start accepts. Automaton has 123285 states and 144618 transitions. Word has length 248 [2022-07-22 11:24:43,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:24:43,645 INFO L495 AbstractCegarLoop]: Abstraction has 123285 states and 144618 transitions. [2022-07-22 11:24:43,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:24:43,646 INFO L276 IsEmpty]: Start isEmpty. Operand 123285 states and 144618 transitions. [2022-07-22 11:24:43,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-07-22 11:24:43,709 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:24:43,709 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 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] [2022-07-22 11:24:43,727 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 11:24:43,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:24:43,927 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:24:43,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:24:43,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1977088340, now seen corresponding path program 1 times [2022-07-22 11:24:43,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:24:43,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812712634] [2022-07-22 11:24:43,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:43,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:24:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-22 11:24:43,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:24:43,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812712634] [2022-07-22 11:24:43,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812712634] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:24:43,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51444153] [2022-07-22 11:24:43,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:43,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:24:43,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:24:43,995 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 11:24:43,996 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 11:24:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:44,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 11:24:44,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:24:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-22 11:24:44,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:24:44,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51444153] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:24:44,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:24:44,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-22 11:24:44,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525839918] [2022-07-22 11:24:44,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:24:44,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:24:44,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:24:44,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:24:44,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:24:44,172 INFO L87 Difference]: Start difference. First operand 123285 states and 144618 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:24:45,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:24:45,241 INFO L93 Difference]: Finished difference Result 238726 states and 280218 transitions. [2022-07-22 11:24:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:24:45,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 248 [2022-07-22 11:24:45,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:24:45,393 INFO L225 Difference]: With dead ends: 238726 [2022-07-22 11:24:45,393 INFO L226 Difference]: Without dead ends: 116458 [2022-07-22 11:24:45,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 247 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 11:24:45,461 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 308 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:24:45,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 11:24:45,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116458 states. [2022-07-22 11:24:47,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116458 to 116458. [2022-07-22 11:24:47,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116458 states, 116457 states have (on average 1.1661471616132992) internal successors, (135806), 116457 states have internal predecessors, (135806), 0 states have call successors, (0), 0 states 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 11:24:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116458 states to 116458 states and 135806 transitions. [2022-07-22 11:24:47,257 INFO L78 Accepts]: Start accepts. Automaton has 116458 states and 135806 transitions. Word has length 248 [2022-07-22 11:24:47,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:24:47,257 INFO L495 AbstractCegarLoop]: Abstraction has 116458 states and 135806 transitions. [2022-07-22 11:24:47,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:24:47,257 INFO L276 IsEmpty]: Start isEmpty. Operand 116458 states and 135806 transitions. [2022-07-22 11:24:47,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-07-22 11:24:47,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:24:47,302 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:24:47,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 11:24:47,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 11:24:47,516 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:24:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:24:47,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1034228266, now seen corresponding path program 1 times [2022-07-22 11:24:47,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:24:47,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705049084] [2022-07-22 11:24:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:47,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:24:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:24:47,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:24:47,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705049084] [2022-07-22 11:24:47,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705049084] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:24:47,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:24:47,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:24:47,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547600256] [2022-07-22 11:24:47,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:24:47,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:24:47,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:24:47,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:24:47,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:24:47,859 INFO L87 Difference]: Start difference. First operand 116458 states and 135806 transitions. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 11:24:49,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:24:49,312 INFO L93 Difference]: Finished difference Result 231139 states and 269645 transitions. [2022-07-22 11:24:49,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:24:49,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 248 [2022-07-22 11:24:49,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:24:49,766 INFO L225 Difference]: With dead ends: 231139 [2022-07-22 11:24:49,774 INFO L226 Difference]: Without dead ends: 115698 [2022-07-22 11:24:49,859 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 11:24:49,860 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 388 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:24:49,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 106 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 11:24:49,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115698 states. [2022-07-22 11:24:51,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115698 to 112350. [2022-07-22 11:24:51,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112350 states, 112349 states have (on average 1.15851498455705) internal successors, (130158), 112349 states have internal predecessors, (130158), 0 states have call successors, (0), 0 states 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 11:24:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112350 states to 112350 states and 130158 transitions. [2022-07-22 11:24:51,323 INFO L78 Accepts]: Start accepts. Automaton has 112350 states and 130158 transitions. Word has length 248 [2022-07-22 11:24:51,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:24:51,323 INFO L495 AbstractCegarLoop]: Abstraction has 112350 states and 130158 transitions. [2022-07-22 11:24:51,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 11:24:51,323 INFO L276 IsEmpty]: Start isEmpty. Operand 112350 states and 130158 transitions. [2022-07-22 11:24:51,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-07-22 11:24:51,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:24:51,371 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:24:51,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 11:24:51,371 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:24:51,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:24:51,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1955164033, now seen corresponding path program 1 times [2022-07-22 11:24:51,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:24:51,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592090652] [2022-07-22 11:24:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:51,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:24:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-22 11:24:51,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:24:51,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592090652] [2022-07-22 11:24:51,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592090652] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:24:51,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841766453] [2022-07-22 11:24:51,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:51,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:24:51,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:24:51,455 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 11:24:51,457 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 11:24:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:51,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 11:24:51,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:24:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-22 11:24:51,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:24:51,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841766453] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:24:51,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:24:51,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-22 11:24:51,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489780473] [2022-07-22 11:24:51,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:24:51,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:24:51,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:24:51,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:24:51,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:24:51,684 INFO L87 Difference]: Start difference. First operand 112350 states and 130158 transitions. Second operand has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:24:53,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:24:53,538 INFO L93 Difference]: Finished difference Result 303695 states and 351773 transitions. [2022-07-22 11:24:53,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:24:53,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2022-07-22 11:24:53,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:24:53,797 INFO L225 Difference]: With dead ends: 303695 [2022-07-22 11:24:53,798 INFO L226 Difference]: Without dead ends: 192362 [2022-07-22 11:24:53,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:24:53,890 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 519 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:24:53,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 485 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:24:54,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192362 states. [2022-07-22 11:24:56,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192362 to 166686. [2022-07-22 11:24:56,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166686 states, 166685 states have (on average 1.159018507964124) internal successors, (193191), 166685 states have internal predecessors, (193191), 0 states have call successors, (0), 0 states 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 11:24:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166686 states to 166686 states and 193191 transitions. [2022-07-22 11:24:56,806 INFO L78 Accepts]: Start accepts. Automaton has 166686 states and 193191 transitions. Word has length 255 [2022-07-22 11:24:56,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:24:56,806 INFO L495 AbstractCegarLoop]: Abstraction has 166686 states and 193191 transitions. [2022-07-22 11:24:56,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:24:56,807 INFO L276 IsEmpty]: Start isEmpty. Operand 166686 states and 193191 transitions. [2022-07-22 11:24:56,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-07-22 11:24:56,851 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:24:56,851 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-22 11:24:56,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 11:24:57,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 11:24:57,070 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:24:57,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:24:57,070 INFO L85 PathProgramCache]: Analyzing trace with hash -216744641, now seen corresponding path program 1 times [2022-07-22 11:24:57,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:24:57,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65677958] [2022-07-22 11:24:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:24:57,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:24:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:24:57,168 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-22 11:24:57,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:24:57,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65677958] [2022-07-22 11:24:57,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65677958] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:24:57,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:24:57,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:24:57,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375268654] [2022-07-22 11:24:57,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:24:57,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:24:57,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:24:57,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:24:57,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:24:57,171 INFO L87 Difference]: Start difference. First operand 166686 states and 193191 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:24:59,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:24:59,075 INFO L93 Difference]: Finished difference Result 370852 states and 430935 transitions. [2022-07-22 11:24:59,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:24:59,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 274 [2022-07-22 11:24:59,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:24:59,395 INFO L225 Difference]: With dead ends: 370852 [2022-07-22 11:24:59,396 INFO L226 Difference]: Without dead ends: 204980 [2022-07-22 11:24:59,468 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 11:24:59,469 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 226 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:24:59,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 162 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:24:59,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204980 states. [2022-07-22 11:25:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204980 to 204969. [2022-07-22 11:25:02,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204969 states, 204968 states have (on average 1.1619618672182974) internal successors, (238165), 204968 states have internal predecessors, (238165), 0 states have call successors, (0), 0 states 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 11:25:02,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204969 states to 204969 states and 238165 transitions. [2022-07-22 11:25:02,777 INFO L78 Accepts]: Start accepts. Automaton has 204969 states and 238165 transitions. Word has length 274 [2022-07-22 11:25:02,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:25:02,778 INFO L495 AbstractCegarLoop]: Abstraction has 204969 states and 238165 transitions. [2022-07-22 11:25:02,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:02,778 INFO L276 IsEmpty]: Start isEmpty. Operand 204969 states and 238165 transitions. [2022-07-22 11:25:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-07-22 11:25:02,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:25:02,821 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:25:02,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 11:25:02,821 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:25:02,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:25:02,822 INFO L85 PathProgramCache]: Analyzing trace with hash -139191225, now seen corresponding path program 1 times [2022-07-22 11:25:02,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:25:02,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213636937] [2022-07-22 11:25:02,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:25:02,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:25:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:25:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-22 11:25:02,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:25:02,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213636937] [2022-07-22 11:25:02,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213636937] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:25:02,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:25:02,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:25:02,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289887381] [2022-07-22 11:25:02,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:25:02,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:25:02,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:25:02,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:25:02,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:25:02,898 INFO L87 Difference]: Start difference. First operand 204969 states and 238165 transitions. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:05,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:25:05,112 INFO L93 Difference]: Finished difference Result 420760 states and 490823 transitions. [2022-07-22 11:25:05,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:25:05,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 280 [2022-07-22 11:25:05,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:25:05,456 INFO L225 Difference]: With dead ends: 420760 [2022-07-22 11:25:05,457 INFO L226 Difference]: Without dead ends: 217015 [2022-07-22 11:25:05,625 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 11:25:05,626 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 471 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:25:05,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 466 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:25:05,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217015 states. [2022-07-22 11:25:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217015 to 215781. [2022-07-22 11:25:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215781 states, 215780 states have (on average 1.1622995643711187) internal successors, (250801), 215780 states have internal predecessors, (250801), 0 states have call successors, (0), 0 states 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 11:25:08,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215781 states to 215781 states and 250801 transitions. [2022-07-22 11:25:08,509 INFO L78 Accepts]: Start accepts. Automaton has 215781 states and 250801 transitions. Word has length 280 [2022-07-22 11:25:08,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:25:08,509 INFO L495 AbstractCegarLoop]: Abstraction has 215781 states and 250801 transitions. [2022-07-22 11:25:08,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:08,510 INFO L276 IsEmpty]: Start isEmpty. Operand 215781 states and 250801 transitions. [2022-07-22 11:25:08,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-07-22 11:25:08,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:25:08,549 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:25:08,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 11:25:08,550 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:25:08,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:25:08,551 INFO L85 PathProgramCache]: Analyzing trace with hash -128368167, now seen corresponding path program 1 times [2022-07-22 11:25:08,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:25:08,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831456119] [2022-07-22 11:25:08,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:25:08,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:25:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:25:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-22 11:25:08,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:25:08,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831456119] [2022-07-22 11:25:08,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831456119] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:25:08,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:25:08,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:25:08,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935438467] [2022-07-22 11:25:08,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:25:08,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:25:08,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:25:08,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:25:08,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:25:08,635 INFO L87 Difference]: Start difference. First operand 215781 states and 250801 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:10,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:25:10,717 INFO L93 Difference]: Finished difference Result 417760 states and 488506 transitions. [2022-07-22 11:25:10,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:25:10,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 282 [2022-07-22 11:25:10,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:25:10,964 INFO L225 Difference]: With dead ends: 417760 [2022-07-22 11:25:10,964 INFO L226 Difference]: Without dead ends: 186354 [2022-07-22 11:25:11,110 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 11:25:11,110 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 168 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 11:25:11,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 373 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 11:25:11,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186354 states. [2022-07-22 11:25:13,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186354 to 161979. [2022-07-22 11:25:13,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161979 states, 161978 states have (on average 1.1032732840262258) internal successors, (178706), 161978 states have internal predecessors, (178706), 0 states have call successors, (0), 0 states 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 11:25:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161979 states to 161979 states and 178706 transitions. [2022-07-22 11:25:13,949 INFO L78 Accepts]: Start accepts. Automaton has 161979 states and 178706 transitions. Word has length 282 [2022-07-22 11:25:13,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:25:13,949 INFO L495 AbstractCegarLoop]: Abstraction has 161979 states and 178706 transitions. [2022-07-22 11:25:13,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:25:13,949 INFO L276 IsEmpty]: Start isEmpty. Operand 161979 states and 178706 transitions. [2022-07-22 11:25:13,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-07-22 11:25:13,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:25:13,990 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:25:13,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 11:25:13,991 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:25:13,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:25:13,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1069010768, now seen corresponding path program 1 times [2022-07-22 11:25:13,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:25:13,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061609926] [2022-07-22 11:25:13,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:25:13,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:25:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:25:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:25:14,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:25:14,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061609926] [2022-07-22 11:25:14,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061609926] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:25:14,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:25:14,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:25:14,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815019799] [2022-07-22 11:25:14,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:25:14,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:25:14,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:25:14,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:25:14,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:25:14,165 INFO L87 Difference]: Start difference. First operand 161979 states and 178706 transitions. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)