./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label18.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/Problem12_label18.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 2e51d75a8ad9c92226cf9c3e34cc8785c0e5af56e84d6fc07c305ea014e608b6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 12:25:47,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 12:25:47,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 12:25:47,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 12:25:47,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 12:25:47,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 12:25:48,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 12:25:48,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 12:25:48,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 12:25:48,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 12:25:48,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 12:25:48,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 12:25:48,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 12:25:48,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 12:25:48,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 12:25:48,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 12:25:48,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 12:25:48,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 12:25:48,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 12:25:48,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 12:25:48,014 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 12:25:48,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 12:25:48,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 12:25:48,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 12:25:48,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 12:25:48,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 12:25:48,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 12:25:48,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 12:25:48,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 12:25:48,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 12:25:48,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 12:25:48,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 12:25:48,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 12:25:48,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 12:25:48,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 12:25:48,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 12:25:48,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 12:25:48,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 12:25:48,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 12:25:48,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 12:25:48,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 12:25:48,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 12:25:48,029 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 12:25:48,047 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 12:25:48,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 12:25:48,047 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 12:25:48,048 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 12:25:48,048 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 12:25:48,049 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 12:25:48,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 12:25:48,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 12:25:48,050 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 12:25:48,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 12:25:48,051 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 12:25:48,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 12:25:48,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 12:25:48,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 12:25:48,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 12:25:48,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 12:25:48,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 12:25:48,053 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 12:25:48,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 12:25:48,053 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 12:25:48,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 12:25:48,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 12:25:48,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 12:25:48,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 12:25:48,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:25:48,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 12:25:48,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 12:25:48,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 12:25:48,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 12:25:48,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 12:25:48,056 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 12:25:48,056 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 12:25:48,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 12:25:48,056 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e51d75a8ad9c92226cf9c3e34cc8785c0e5af56e84d6fc07c305ea014e608b6 [2022-07-22 12:25:48,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 12:25:48,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 12:25:48,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 12:25:48,302 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 12:25:48,302 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 12:25:48,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label18.c [2022-07-22 12:25:48,366 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b73c88813/e34403e3368c4f3fa56d2c6f9327939a/FLAG1a99c8813 [2022-07-22 12:25:49,045 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 12:25:49,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label18.c [2022-07-22 12:25:49,077 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b73c88813/e34403e3368c4f3fa56d2c6f9327939a/FLAG1a99c8813 [2022-07-22 12:25:49,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b73c88813/e34403e3368c4f3fa56d2c6f9327939a [2022-07-22 12:25:49,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 12:25:49,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 12:25:49,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 12:25:49,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 12:25:49,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 12:25:49,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:25:49" (1/1) ... [2022-07-22 12:25:49,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18e22d54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:25:49, skipping insertion in model container [2022-07-22 12:25:49,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:25:49" (1/1) ... [2022-07-22 12:25:49,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 12:25:49,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 12:25:49,672 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/Problem12_label18.c[6604,6617] [2022-07-22 12:25:50,329 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:25:50,337 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 12:25:50,367 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/Problem12_label18.c[6604,6617] [2022-07-22 12:25:50,742 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:25:50,761 INFO L208 MainTranslator]: Completed translation [2022-07-22 12:25:50,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:25:50 WrapperNode [2022-07-22 12:25:50,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 12:25:50,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 12:25:50,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 12:25:50,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 12:25:50,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:25:50" (1/1) ... [2022-07-22 12:25:50,876 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:25:50" (1/1) ... [2022-07-22 12:25:51,245 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2022-07-22 12:25:51,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 12:25:51,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 12:25:51,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 12:25:51,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 12:25:51,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:25:50" (1/1) ... [2022-07-22 12:25:51,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:25:50" (1/1) ... [2022-07-22 12:25:51,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:25:50" (1/1) ... [2022-07-22 12:25:51,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:25:50" (1/1) ... [2022-07-22 12:25:51,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:25:50" (1/1) ... [2022-07-22 12:25:51,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:25:50" (1/1) ... [2022-07-22 12:25:51,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:25:50" (1/1) ... [2022-07-22 12:25:51,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 12:25:51,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 12:25:51,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 12:25:51,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 12:25:51,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:25:50" (1/1) ... [2022-07-22 12:25:51,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:25:51,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:25:51,635 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 12:25:51,649 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 12:25:51,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 12:25:51,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 12:25:51,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 12:25:51,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 12:25:51,756 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 12:25:51,757 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 12:25:55,159 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 12:25:55,171 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 12:25:55,172 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 12:25:55,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:25:55 BoogieIcfgContainer [2022-07-22 12:25:55,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 12:25:55,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 12:25:55,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 12:25:55,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 12:25:55,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:25:49" (1/3) ... [2022-07-22 12:25:55,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f9ffd84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:25:55, skipping insertion in model container [2022-07-22 12:25:55,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:25:50" (2/3) ... [2022-07-22 12:25:55,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f9ffd84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:25:55, skipping insertion in model container [2022-07-22 12:25:55,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:25:55" (3/3) ... [2022-07-22 12:25:55,182 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label18.c [2022-07-22 12:25:55,194 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 12:25:55,195 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 12:25:55,250 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 12:25:55,256 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@24a93580, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@35f957f [2022-07-22 12:25:55,256 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 12:25:55,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-22 12:25:55,272 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:25:55,272 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] [2022-07-22 12:25:55,273 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:25:55,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:25:55,279 INFO L85 PathProgramCache]: Analyzing trace with hash -92557335, now seen corresponding path program 1 times [2022-07-22 12:25:55,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:25:55,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247336013] [2022-07-22 12:25:55,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:25:55,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:25:55,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:25:55,560 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 12:25:55,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:25:55,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247336013] [2022-07-22 12:25:55,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247336013] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:25:55,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:25:55,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:25:55,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036819110] [2022-07-22 12:25:55,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:25:55,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:25:55,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:25:55,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:25:55,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:25:55,603 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:59,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:25:59,085 INFO L93 Difference]: Finished difference Result 2404 states and 4645 transitions. [2022-07-22 12:25:59,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:25:59,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-22 12:25:59,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:25:59,109 INFO L225 Difference]: With dead ends: 2404 [2022-07-22 12:25:59,110 INFO L226 Difference]: Without dead ends: 1506 [2022-07-22 12:25:59,119 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 12:25:59,122 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 767 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:25:59,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 525 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-22 12:25:59,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-07-22 12:25:59,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-07-22 12:25:59,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6066445182724252) internal successors, (2418), 1505 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:59,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2418 transitions. [2022-07-22 12:25:59,244 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2418 transitions. Word has length 53 [2022-07-22 12:25:59,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:25:59,246 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2418 transitions. [2022-07-22 12:25:59,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:59,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2418 transitions. [2022-07-22 12:25:59,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-22 12:25:59,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:25:59,255 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:25:59,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 12:25:59,256 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:25:59,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:25:59,257 INFO L85 PathProgramCache]: Analyzing trace with hash 749421029, now seen corresponding path program 1 times [2022-07-22 12:25:59,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:25:59,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125164864] [2022-07-22 12:25:59,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:25:59,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:25:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:25:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:25:59,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:25:59,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125164864] [2022-07-22 12:25:59,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125164864] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:25:59,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:25:59,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:25:59,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026367046] [2022-07-22 12:25:59,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:25:59,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:25:59,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:25:59,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:25:59,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:25:59,474 INFO L87 Difference]: Start difference. First operand 1506 states and 2418 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:02,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:26:02,358 INFO L93 Difference]: Finished difference Result 4512 states and 7249 transitions. [2022-07-22 12:26:02,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:26:02,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2022-07-22 12:26:02,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:26:02,370 INFO L225 Difference]: With dead ends: 4512 [2022-07-22 12:26:02,371 INFO L226 Difference]: Without dead ends: 3008 [2022-07-22 12:26:02,373 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 12:26:02,374 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 774 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:26:02,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 449 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-22 12:26:02,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2022-07-22 12:26:02,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2022-07-22 12:26:02,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.4156967076820752) internal successors, (4257), 3007 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:02,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4257 transitions. [2022-07-22 12:26:02,432 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4257 transitions. Word has length 128 [2022-07-22 12:26:02,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:26:02,432 INFO L495 AbstractCegarLoop]: Abstraction has 3008 states and 4257 transitions. [2022-07-22 12:26:02,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:02,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4257 transitions. [2022-07-22 12:26:02,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-22 12:26:02,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:26:02,435 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:26:02,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 12:26:02,435 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:26:02,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:26:02,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1433167350, now seen corresponding path program 1 times [2022-07-22 12:26:02,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:26:02,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240024895] [2022-07-22 12:26:02,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:26:02,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:26:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:26:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:26:02,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:26:02,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240024895] [2022-07-22 12:26:02,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240024895] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:26:02,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:26:02,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:26:02,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865559981] [2022-07-22 12:26:02,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:26:02,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:26:02,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:26:02,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:26:02,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:26:02,551 INFO L87 Difference]: Start difference. First operand 3008 states and 4257 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:06,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:26:06,843 INFO L93 Difference]: Finished difference Result 9769 states and 13601 transitions. [2022-07-22 12:26:06,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:26:06,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2022-07-22 12:26:06,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:26:06,866 INFO L225 Difference]: With dead ends: 9769 [2022-07-22 12:26:06,867 INFO L226 Difference]: Without dead ends: 6763 [2022-07-22 12:26:06,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:26:06,871 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 2182 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 4712 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2182 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 5459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 4712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:26:06,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2182 Valid, 164 Invalid, 5459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 4712 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-22 12:26:06,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2022-07-22 12:26:06,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2022-07-22 12:26:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.3510795622596865) internal successors, (9136), 6762 states have internal predecessors, (9136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 9136 transitions. [2022-07-22 12:26:06,995 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 9136 transitions. Word has length 130 [2022-07-22 12:26:06,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:26:06,995 INFO L495 AbstractCegarLoop]: Abstraction has 6763 states and 9136 transitions. [2022-07-22 12:26:06,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 9136 transitions. [2022-07-22 12:26:07,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-07-22 12:26:07,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:26:07,001 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:26:07,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 12:26:07,002 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:26:07,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:26:07,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1936892246, now seen corresponding path program 1 times [2022-07-22 12:26:07,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:26:07,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093466912] [2022-07-22 12:26:07,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:26:07,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:26:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:26:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:26:07,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:26:07,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093466912] [2022-07-22 12:26:07,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093466912] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:26:07,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:26:07,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:26:07,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472401661] [2022-07-22 12:26:07,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:26:07,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:26:07,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:26:07,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:26:07,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:26:07,179 INFO L87 Difference]: Start difference. First operand 6763 states and 9136 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:09,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:26:09,932 INFO L93 Difference]: Finished difference Result 15777 states and 21635 transitions. [2022-07-22 12:26:09,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:26:09,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-07-22 12:26:09,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:26:09,964 INFO L225 Difference]: With dead ends: 15777 [2022-07-22 12:26:09,964 INFO L226 Difference]: Without dead ends: 9767 [2022-07-22 12:26:09,973 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 12:26:09,974 INFO L413 NwaCegarLoop]: 1235 mSDtfsCounter, 707 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2693 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 2693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:26:09,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [707 Valid, 1243 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 2693 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 12:26:09,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2022-07-22 12:26:10,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2022-07-22 12:26:10,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.3334015973786606) internal successors, (13022), 9766 states have internal predecessors, (13022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 13022 transitions. [2022-07-22 12:26:10,155 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 13022 transitions. Word has length 194 [2022-07-22 12:26:10,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:26:10,157 INFO L495 AbstractCegarLoop]: Abstraction has 9767 states and 13022 transitions. [2022-07-22 12:26:10,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:10,158 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 13022 transitions. [2022-07-22 12:26:10,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-07-22 12:26:10,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:26:10,160 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:26:10,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 12:26:10,162 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:26:10,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:26:10,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1723378956, now seen corresponding path program 1 times [2022-07-22 12:26:10,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:26:10,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413778677] [2022-07-22 12:26:10,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:26:10,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:26:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:26:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:26:10,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:26:10,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413778677] [2022-07-22 12:26:10,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413778677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:26:10,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:26:10,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:26:10,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410277630] [2022-07-22 12:26:10,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:26:10,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:26:10,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:26:10,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:26:10,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:26:10,305 INFO L87 Difference]: Start difference. First operand 9767 states and 13022 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 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 12:26:12,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:26:12,940 INFO L93 Difference]: Finished difference Result 18781 states and 25285 transitions. [2022-07-22 12:26:12,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:26:12,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 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 198 [2022-07-22 12:26:12,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:26:12,970 INFO L225 Difference]: With dead ends: 18781 [2022-07-22 12:26:12,971 INFO L226 Difference]: Without dead ends: 9767 [2022-07-22 12:26:12,980 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 12:26:12,981 INFO L413 NwaCegarLoop]: 1299 mSDtfsCounter, 737 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 3019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:26:12,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 1307 Invalid, 3019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 12:26:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2022-07-22 12:26:13,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2022-07-22 12:26:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.2981773499897604) internal successors, (12678), 9766 states have internal predecessors, (12678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12678 transitions. [2022-07-22 12:26:13,117 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12678 transitions. Word has length 198 [2022-07-22 12:26:13,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:26:13,118 INFO L495 AbstractCegarLoop]: Abstraction has 9767 states and 12678 transitions. [2022-07-22 12:26:13,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 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 12:26:13,119 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12678 transitions. [2022-07-22 12:26:13,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-07-22 12:26:13,121 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:26:13,121 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:26:13,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 12:26:13,122 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:26:13,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:26:13,122 INFO L85 PathProgramCache]: Analyzing trace with hash 994214791, now seen corresponding path program 1 times [2022-07-22 12:26:13,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:26:13,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690481118] [2022-07-22 12:26:13,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:26:13,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:26:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:26:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 12:26:13,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:26:13,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690481118] [2022-07-22 12:26:13,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690481118] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:26:13,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:26:13,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:26:13,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086196626] [2022-07-22 12:26:13,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:26:13,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:26:13,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:26:13,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:26:13,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:26:13,252 INFO L87 Difference]: Start difference. First operand 9767 states and 12678 transitions. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:26:16,277 INFO L93 Difference]: Finished difference Result 22573 states and 29091 transitions. [2022-07-22 12:26:16,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:26:16,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2022-07-22 12:26:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:26:16,303 INFO L225 Difference]: With dead ends: 22573 [2022-07-22 12:26:16,303 INFO L226 Difference]: Without dead ends: 13522 [2022-07-22 12:26:16,312 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 12:26:16,313 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 690 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3695 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 3902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 3695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:26:16,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 628 Invalid, 3902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 3695 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-22 12:26:16,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13522 states. [2022-07-22 12:26:16,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13522 to 12771. [2022-07-22 12:26:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12771 states, 12770 states have (on average 1.2293657008613939) internal successors, (15699), 12770 states have internal predecessors, (15699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:16,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12771 states to 12771 states and 15699 transitions. [2022-07-22 12:26:16,478 INFO L78 Accepts]: Start accepts. Automaton has 12771 states and 15699 transitions. Word has length 207 [2022-07-22 12:26:16,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:26:16,478 INFO L495 AbstractCegarLoop]: Abstraction has 12771 states and 15699 transitions. [2022-07-22 12:26:16,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:16,479 INFO L276 IsEmpty]: Start isEmpty. Operand 12771 states and 15699 transitions. [2022-07-22 12:26:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-07-22 12:26:16,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:26:16,483 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:26:16,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 12:26:16,483 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:26:16,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:26:16,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1112033906, now seen corresponding path program 1 times [2022-07-22 12:26:16,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:26:16,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096404662] [2022-07-22 12:26:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:26:16,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:26:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:26:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 101 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 12:26:16,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:26:16,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096404662] [2022-07-22 12:26:16,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096404662] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:26:16,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112338789] [2022-07-22 12:26:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:26:16,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:26:16,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:26:16,627 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 12:26:16,633 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 12:26:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:26:16,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:26:16,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:26:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:26:16,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:26:16,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112338789] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:26:16,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:26:16,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-22 12:26:16,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121879497] [2022-07-22 12:26:16,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:26:16,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:26:16,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:26:16,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:26:16,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:26:16,918 INFO L87 Difference]: Start difference. First operand 12771 states and 15699 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:19,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:26:19,609 INFO L93 Difference]: Finished difference Result 32299 states and 40603 transitions. [2022-07-22 12:26:19,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:26:19,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 281 [2022-07-22 12:26:19,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:26:19,641 INFO L225 Difference]: With dead ends: 32299 [2022-07-22 12:26:19,642 INFO L226 Difference]: Without dead ends: 20281 [2022-07-22 12:26:19,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:26:19,655 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 907 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:26:19,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 309 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 2072 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 12:26:19,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20281 states. [2022-07-22 12:26:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20281 to 20281. [2022-07-22 12:26:19,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20281 states, 20280 states have (on average 1.192603550295858) internal successors, (24186), 20280 states have internal predecessors, (24186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20281 states to 20281 states and 24186 transitions. [2022-07-22 12:26:19,900 INFO L78 Accepts]: Start accepts. Automaton has 20281 states and 24186 transitions. Word has length 281 [2022-07-22 12:26:19,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:26:19,900 INFO L495 AbstractCegarLoop]: Abstraction has 20281 states and 24186 transitions. [2022-07-22 12:26:19,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:19,901 INFO L276 IsEmpty]: Start isEmpty. Operand 20281 states and 24186 transitions. [2022-07-22 12:26:19,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-07-22 12:26:19,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:26:19,906 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:26:19,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 12:26:20,119 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 12:26:20,120 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:26:20,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:26:20,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1206592447, now seen corresponding path program 1 times [2022-07-22 12:26:20,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:26:20,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638726731] [2022-07-22 12:26:20,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:26:20,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:26:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:26:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-22 12:26:20,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:26:20,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638726731] [2022-07-22 12:26:20,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638726731] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:26:20,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:26:20,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:26:20,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739125820] [2022-07-22 12:26:20,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:26:20,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:26:20,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:26:20,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:26:20,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:26:20,269 INFO L87 Difference]: Start difference. First operand 20281 states and 24186 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:23,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:26:23,075 INFO L93 Difference]: Finished difference Result 57082 states and 68620 transitions. [2022-07-22 12:26:23,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:26:23,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 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 330 [2022-07-22 12:26:23,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:26:23,134 INFO L225 Difference]: With dead ends: 57082 [2022-07-22 12:26:23,135 INFO L226 Difference]: Without dead ends: 37554 [2022-07-22 12:26:23,159 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 12:26:23,160 INFO L413 NwaCegarLoop]: 1337 mSDtfsCounter, 740 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2179 mSolverCounterSat, 693 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 2872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 693 IncrementalHoareTripleChecker+Valid, 2179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:26:23,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 1345 Invalid, 2872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [693 Valid, 2179 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 12:26:23,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37554 states. [2022-07-22 12:26:23,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37554 to 34550. [2022-07-22 12:26:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34550 states, 34549 states have (on average 1.154534139917219) internal successors, (39888), 34549 states have internal predecessors, (39888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:23,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34550 states to 34550 states and 39888 transitions. [2022-07-22 12:26:23,711 INFO L78 Accepts]: Start accepts. Automaton has 34550 states and 39888 transitions. Word has length 330 [2022-07-22 12:26:23,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:26:23,712 INFO L495 AbstractCegarLoop]: Abstraction has 34550 states and 39888 transitions. [2022-07-22 12:26:23,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:23,713 INFO L276 IsEmpty]: Start isEmpty. Operand 34550 states and 39888 transitions. [2022-07-22 12:26:23,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2022-07-22 12:26:23,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:26:23,722 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 12:26:23,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 12:26:23,723 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:26:23,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:26:23,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1459272492, now seen corresponding path program 1 times [2022-07-22 12:26:23,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:26:23,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858808071] [2022-07-22 12:26:23,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:26:23,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:26:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:26:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 12:26:23,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:26:23,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858808071] [2022-07-22 12:26:23,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858808071] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:26:23,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:26:23,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:26:23,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924221108] [2022-07-22 12:26:23,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:26:23,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:26:23,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:26:23,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:26:23,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:26:23,982 INFO L87 Difference]: Start difference. First operand 34550 states and 39888 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:26,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:26:26,449 INFO L93 Difference]: Finished difference Result 80363 states and 93219 transitions. [2022-07-22 12:26:26,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:26:26,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 352 [2022-07-22 12:26:26,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:26:26,505 INFO L225 Difference]: With dead ends: 80363 [2022-07-22 12:26:26,505 INFO L226 Difference]: Without dead ends: 46566 [2022-07-22 12:26:26,601 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 12:26:26,608 INFO L413 NwaCegarLoop]: 1226 mSDtfsCounter, 701 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 2787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:26:26,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 1234 Invalid, 2787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 12:26:26,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46566 states. [2022-07-22 12:26:27,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46566 to 46566. [2022-07-22 12:26:27,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46566 states, 46565 states have (on average 1.1030817137334907) internal successors, (51365), 46565 states have internal predecessors, (51365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:27,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46566 states to 46566 states and 51365 transitions. [2022-07-22 12:26:27,214 INFO L78 Accepts]: Start accepts. Automaton has 46566 states and 51365 transitions. Word has length 352 [2022-07-22 12:26:27,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:26:27,215 INFO L495 AbstractCegarLoop]: Abstraction has 46566 states and 51365 transitions. [2022-07-22 12:26:27,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:27,215 INFO L276 IsEmpty]: Start isEmpty. Operand 46566 states and 51365 transitions. [2022-07-22 12:26:27,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-07-22 12:26:27,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:26:27,223 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:27,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 12:26:27,224 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:26:27,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:26:27,225 INFO L85 PathProgramCache]: Analyzing trace with hash -546201483, now seen corresponding path program 1 times [2022-07-22 12:26:27,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:26:27,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706811464] [2022-07-22 12:26:27,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:26:27,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:26:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:26:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-22 12:26:27,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:26:27,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706811464] [2022-07-22 12:26:27,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706811464] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:26:27,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434964205] [2022-07-22 12:26:27,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:26:27,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:26:27,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:26:27,588 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 12:26:27,590 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 12:26:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:26:27,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:26:27,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:26:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-22 12:26:28,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:26:28,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434964205] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:26:28,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:26:28,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-22 12:26:28,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619789976] [2022-07-22 12:26:28,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:26:28,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:26:28,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:26:28,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:26:28,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:26:28,193 INFO L87 Difference]: Start difference. First operand 46566 states and 51365 transitions. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 2 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:30,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:26:30,814 INFO L93 Difference]: Finished difference Result 113407 states and 125782 transitions. [2022-07-22 12:26:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:26:30,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 2 states have internal predecessors, (309), 0 states have call successors, (0), 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 358 [2022-07-22 12:26:30,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:26:30,894 INFO L225 Difference]: With dead ends: 113407 [2022-07-22 12:26:30,894 INFO L226 Difference]: Without dead ends: 67594 [2022-07-22 12:26:30,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:26:30,931 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 484 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2288 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 2820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 2288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:26:30,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 507 Invalid, 2820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 2288 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 12:26:30,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67594 states. [2022-07-22 12:26:31,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67594 to 64590. [2022-07-22 12:26:31,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64590 states, 64589 states have (on average 1.0923377045626965) internal successors, (70553), 64589 states have internal predecessors, (70553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:31,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64590 states to 64590 states and 70553 transitions. [2022-07-22 12:26:31,888 INFO L78 Accepts]: Start accepts. Automaton has 64590 states and 70553 transitions. Word has length 358 [2022-07-22 12:26:31,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:26:31,888 INFO L495 AbstractCegarLoop]: Abstraction has 64590 states and 70553 transitions. [2022-07-22 12:26:31,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 2 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:31,889 INFO L276 IsEmpty]: Start isEmpty. Operand 64590 states and 70553 transitions. [2022-07-22 12:26:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-07-22 12:26:31,895 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:26:31,896 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:26:31,919 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 12:26:32,111 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,SelfDestructingSolverStorable9 [2022-07-22 12:26:32,112 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:26:32,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:26:32,112 INFO L85 PathProgramCache]: Analyzing trace with hash -882090276, now seen corresponding path program 1 times [2022-07-22 12:26:32,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:26:32,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261725939] [2022-07-22 12:26:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:26:32,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:26:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:26:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 336 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:26:32,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:26:32,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261725939] [2022-07-22 12:26:32,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261725939] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:26:32,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761209482] [2022-07-22 12:26:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:26:32,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:26:32,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:26:32,400 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 12:26:32,435 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 12:26:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:26:32,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:26:32,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:26:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-22 12:26:33,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:26:33,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761209482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:26:33,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:26:33,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-07-22 12:26:33,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476618978] [2022-07-22 12:26:33,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:26:33,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:26:33,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:26:33,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:26:33,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:26:33,790 INFO L87 Difference]: Start difference. First operand 64590 states and 70553 transitions. Second operand has 4 states, 4 states have (on average 50.25) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:36,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:26:36,830 INFO L93 Difference]: Finished difference Result 131433 states and 144251 transitions. [2022-07-22 12:26:36,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:26:36,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.25) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 384 [2022-07-22 12:26:36,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:26:37,018 INFO L225 Difference]: With dead ends: 131433 [2022-07-22 12:26:37,018 INFO L226 Difference]: Without dead ends: 131431 [2022-07-22 12:26:37,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:26:37,034 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1835 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 2285 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1835 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 6302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 2285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3753 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:26:37,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1835 Valid, 57 Invalid, 6302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 2285 Invalid, 0 Unknown, 3753 Unchecked, 2.5s Time] [2022-07-22 12:26:37,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131431 states. [2022-07-22 12:26:38,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131431 to 131429. [2022-07-22 12:26:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131429 states, 131428 states have (on average 1.0975362936360593) internal successors, (144247), 131428 states have internal predecessors, (144247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:38,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131429 states to 131429 states and 144247 transitions. [2022-07-22 12:26:38,764 INFO L78 Accepts]: Start accepts. Automaton has 131429 states and 144247 transitions. Word has length 384 [2022-07-22 12:26:38,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:26:38,766 INFO L495 AbstractCegarLoop]: Abstraction has 131429 states and 144247 transitions. [2022-07-22 12:26:38,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.25) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:38,766 INFO L276 IsEmpty]: Start isEmpty. Operand 131429 states and 144247 transitions. [2022-07-22 12:26:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2022-07-22 12:26:38,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:26:38,816 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:38,842 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 12:26:39,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:26:39,039 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:26:39,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:26:39,040 INFO L85 PathProgramCache]: Analyzing trace with hash 669929638, now seen corresponding path program 1 times [2022-07-22 12:26:39,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:26:39,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067656935] [2022-07-22 12:26:39,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:26:39,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:26:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:26:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 437 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-22 12:26:39,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:26:39,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067656935] [2022-07-22 12:26:39,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067656935] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:26:39,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:26:39,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:26:39,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526087373] [2022-07-22 12:26:39,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:26:39,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:26:39,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:26:39,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:26:39,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:26:39,227 INFO L87 Difference]: Start difference. First operand 131429 states and 144247 transitions. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:42,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:26:42,311 INFO L93 Difference]: Finished difference Result 290643 states and 318588 transitions. [2022-07-22 12:26:42,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:26:42,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 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 467 [2022-07-22 12:26:42,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:26:42,518 INFO L225 Difference]: With dead ends: 290643 [2022-07-22 12:26:42,518 INFO L226 Difference]: Without dead ends: 159967 [2022-07-22 12:26:42,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 12:26:42,804 INFO L413 NwaCegarLoop]: 897 mSDtfsCounter, 788 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2137 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 2732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 2137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:26:42,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 904 Invalid, 2732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 2137 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 12:26:42,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159967 states. [2022-07-22 12:26:44,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159967 to 146449. [2022-07-22 12:26:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146449 states, 146448 states have (on average 1.0890213591172293) internal successors, (159485), 146448 states have internal predecessors, (159485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:44,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146449 states to 146449 states and 159485 transitions. [2022-07-22 12:26:44,804 INFO L78 Accepts]: Start accepts. Automaton has 146449 states and 159485 transitions. Word has length 467 [2022-07-22 12:26:44,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:26:44,805 INFO L495 AbstractCegarLoop]: Abstraction has 146449 states and 159485 transitions. [2022-07-22 12:26:44,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:44,805 INFO L276 IsEmpty]: Start isEmpty. Operand 146449 states and 159485 transitions. [2022-07-22 12:26:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-07-22 12:26:44,817 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:26:44,818 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:44,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 12:26:44,818 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:26:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:26:44,819 INFO L85 PathProgramCache]: Analyzing trace with hash 780393461, now seen corresponding path program 1 times [2022-07-22 12:26:44,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:26:44,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012913657] [2022-07-22 12:26:44,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:26:44,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:26:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:26:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 705 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-07-22 12:26:45,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:26:45,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012913657] [2022-07-22 12:26:45,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012913657] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:26:45,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:26:45,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:26:45,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448071881] [2022-07-22 12:26:45,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:26:45,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:26:45,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:26:45,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:26:45,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:26:45,012 INFO L87 Difference]: Start difference. First operand 146449 states and 159485 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:26:49,011 INFO L93 Difference]: Finished difference Result 354478 states and 387465 transitions. [2022-07-22 12:26:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:26:49,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 519 [2022-07-22 12:26:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:26:49,278 INFO L225 Difference]: With dead ends: 354478 [2022-07-22 12:26:49,278 INFO L226 Difference]: Without dead ends: 208782 [2022-07-22 12:26:49,322 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 12:26:49,323 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 717 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2416 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 2956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 2416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:26:49,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 584 Invalid, 2956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 2416 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-22 12:26:49,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208782 states. [2022-07-22 12:26:51,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208782 to 200521. [2022-07-22 12:26:51,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200521 states, 200520 states have (on average 1.0861310592459605) internal successors, (217791), 200520 states have internal predecessors, (217791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200521 states to 200521 states and 217791 transitions. [2022-07-22 12:26:52,032 INFO L78 Accepts]: Start accepts. Automaton has 200521 states and 217791 transitions. Word has length 519 [2022-07-22 12:26:52,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:26:52,032 INFO L495 AbstractCegarLoop]: Abstraction has 200521 states and 217791 transitions. [2022-07-22 12:26:52,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:52,033 INFO L276 IsEmpty]: Start isEmpty. Operand 200521 states and 217791 transitions. [2022-07-22 12:26:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2022-07-22 12:26:52,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:26:52,044 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:52,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 12:26:52,045 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:26:52,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:26:52,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1271116698, now seen corresponding path program 1 times [2022-07-22 12:26:52,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:26:52,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241317723] [2022-07-22 12:26:52,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:26:52,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:26:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:26:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 756 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-07-22 12:26:52,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:26:52,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241317723] [2022-07-22 12:26:52,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241317723] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:26:52,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:26:52,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:26:52,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046288420] [2022-07-22 12:26:52,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:26:52,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:26:52,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:26:52,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:26:52,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:26:52,236 INFO L87 Difference]: Start difference. First operand 200521 states and 217791 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:56,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:26:56,451 INFO L93 Difference]: Finished difference Result 453610 states and 494541 transitions. [2022-07-22 12:26:56,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:26:56,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 521 [2022-07-22 12:26:56,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:26:56,800 INFO L225 Difference]: With dead ends: 453610 [2022-07-22 12:26:56,800 INFO L226 Difference]: Without dead ends: 253842 [2022-07-22 12:26:56,916 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 12:26:56,917 INFO L413 NwaCegarLoop]: 1295 mSDtfsCounter, 688 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2341 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 2872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 2341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:26:56,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 1303 Invalid, 2872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 2341 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 12:26:57,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253842 states. [2022-07-22 12:26:59,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253842 to 244079. [2022-07-22 12:26:59,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244079 states, 244078 states have (on average 1.0790362097362318) internal successors, (263369), 244078 states have internal predecessors, (263369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:00,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244079 states to 244079 states and 263369 transitions. [2022-07-22 12:27:00,164 INFO L78 Accepts]: Start accepts. Automaton has 244079 states and 263369 transitions. Word has length 521 [2022-07-22 12:27:00,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:27:00,165 INFO L495 AbstractCegarLoop]: Abstraction has 244079 states and 263369 transitions. [2022-07-22 12:27:00,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:00,165 INFO L276 IsEmpty]: Start isEmpty. Operand 244079 states and 263369 transitions. [2022-07-22 12:27:00,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2022-07-22 12:27:00,175 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:27:00,176 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 12:27:00,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 12:27:00,176 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:27:00,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:27:00,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1404141352, now seen corresponding path program 1 times [2022-07-22 12:27:00,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:27:00,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78199210] [2022-07-22 12:27:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:27:00,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:27:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:27:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 712 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-22 12:27:00,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:27:00,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78199210] [2022-07-22 12:27:00,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78199210] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:27:00,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:27:00,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:27:00,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266520619] [2022-07-22 12:27:00,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:27:00,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:27:00,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:27:00,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:27:00,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:27:00,829 INFO L87 Difference]: Start difference. First operand 244079 states and 263369 transitions. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:04,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:27:04,491 INFO L93 Difference]: Finished difference Result 493413 states and 532033 transitions. [2022-07-22 12:27:04,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:27:04,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 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 537 [2022-07-22 12:27:04,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:27:04,857 INFO L225 Difference]: With dead ends: 493413 [2022-07-22 12:27:04,857 INFO L226 Difference]: Without dead ends: 250087 [2022-07-22 12:27:05,004 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 12:27:05,004 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 761 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 2636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:27:05,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 232 Invalid, 2636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 12:27:05,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250087 states. [2022-07-22 12:27:07,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250087 to 241826. [2022-07-22 12:27:08,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241826 states, 241825 states have (on average 1.0698852475964025) internal successors, (258725), 241825 states have internal predecessors, (258725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241826 states to 241826 states and 258725 transitions. [2022-07-22 12:27:08,349 INFO L78 Accepts]: Start accepts. Automaton has 241826 states and 258725 transitions. Word has length 537 [2022-07-22 12:27:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:27:08,349 INFO L495 AbstractCegarLoop]: Abstraction has 241826 states and 258725 transitions. [2022-07-22 12:27:08,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:08,350 INFO L276 IsEmpty]: Start isEmpty. Operand 241826 states and 258725 transitions. [2022-07-22 12:27:08,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2022-07-22 12:27:08,366 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:27:08,366 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2022-07-22 12:27:08,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 12:27:08,366 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:27:08,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:27:08,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1368403669, now seen corresponding path program 1 times [2022-07-22 12:27:08,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:27:08,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620463993] [2022-07-22 12:27:08,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:27:08,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:27:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:27:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 748 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2022-07-22 12:27:08,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:27:08,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620463993] [2022-07-22 12:27:08,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620463993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:27:08,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:27:08,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:27:08,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788834120] [2022-07-22 12:27:08,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:27:08,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:27:08,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:27:08,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:27:08,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:27:08,528 INFO L87 Difference]: Start difference. First operand 241826 states and 258725 transitions. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:13,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:27:13,000 INFO L93 Difference]: Finished difference Result 526457 states and 565356 transitions. [2022-07-22 12:27:13,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:27:13,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 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 559 [2022-07-22 12:27:13,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:27:13,406 INFO L225 Difference]: With dead ends: 526457 [2022-07-22 12:27:13,407 INFO L226 Difference]: Without dead ends: 285384 [2022-07-22 12:27:13,543 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 12:27:13,543 INFO L413 NwaCegarLoop]: 1276 mSDtfsCounter, 647 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2242 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 2242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:27:13,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 1284 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 2242 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 12:27:13,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285384 states.