./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem19_label51.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/Problem19_label51.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 31805de0830de2b1932982a70f950995cd5cf878b2a5369c2a4d1555e822907c --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:09:35,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:09:35,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:09:35,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:09:35,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:09:35,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:09:35,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:09:35,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:09:35,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:09:35,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:09:35,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:09:35,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:09:35,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:09:35,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:09:35,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:09:35,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:09:35,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:09:35,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:09:35,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:09:35,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:09:35,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:09:35,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:09:35,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:09:35,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:09:35,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:09:35,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:09:35,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:09:35,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:09:35,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:09:35,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:09:35,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:09:35,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:09:35,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:09:35,894 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:09:35,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:09:35,896 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:09:35,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:09:35,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:09:35,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:09:35,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:09:35,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:09:35,898 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:09:35,921 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:09:35,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:09:35,922 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:09:35,922 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:09:35,922 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:09:35,923 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:09:35,923 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:09:35,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:09:35,923 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:09:35,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:09:35,924 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:09:35,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:09:35,924 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:09:35,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:09:35,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:09:35,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:09:35,925 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:09:35,925 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:09:35,925 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:09:35,925 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:09:35,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:09:35,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:09:35,926 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:09:35,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:09:35,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:09:35,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:09:35,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:09:35,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:09:35,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:09:35,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:09:35,927 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:09:35,928 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:09:35,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:09:35,928 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:09:35,928 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31805de0830de2b1932982a70f950995cd5cf878b2a5369c2a4d1555e822907c [2021-12-15 10:09:36,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:09:36,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:09:36,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:09:36,175 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:09:36,176 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:09:36,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label51.c [2021-12-15 10:09:36,233 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e104bdfef/29cbdf82a90f4bf68781c4c27f519650/FLAGe190d32d2 [2021-12-15 10:09:36,923 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:09:36,924 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label51.c [2021-12-15 10:09:36,960 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e104bdfef/29cbdf82a90f4bf68781c4c27f519650/FLAGe190d32d2 [2021-12-15 10:09:37,256 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e104bdfef/29cbdf82a90f4bf68781c4c27f519650 [2021-12-15 10:09:37,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:09:37,259 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:09:37,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:09:37,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:09:37,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:09:37,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:09:37" (1/1) ... [2021-12-15 10:09:37,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ea53c75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:37, skipping insertion in model container [2021-12-15 10:09:37,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:09:37" (1/1) ... [2021-12-15 10:09:37,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:09:37,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:09:37,601 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/Problem19_label51.c[2619,2632] [2021-12-15 10:09:38,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:09:38,401 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:09:38,422 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/Problem19_label51.c[2619,2632] [2021-12-15 10:09:39,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:09:39,108 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:09:39,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:39 WrapperNode [2021-12-15 10:09:39,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:09:39,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:09:39,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:09:39,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:09:39,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:39" (1/1) ... [2021-12-15 10:09:39,180 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:39" (1/1) ... [2021-12-15 10:09:39,864 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-12-15 10:09:39,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:09:39,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:09:39,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:09:39,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:09:39,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:39" (1/1) ... [2021-12-15 10:09:39,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:39" (1/1) ... [2021-12-15 10:09:40,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:39" (1/1) ... [2021-12-15 10:09:40,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:39" (1/1) ... [2021-12-15 10:09:40,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:39" (1/1) ... [2021-12-15 10:09:40,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:39" (1/1) ... [2021-12-15 10:09:40,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:39" (1/1) ... [2021-12-15 10:09:40,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:09:40,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:09:40,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:09:40,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:09:40,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:39" (1/1) ... [2021-12-15 10:09:40,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:09:40,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:09:40,866 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) [2021-12-15 10:09:40,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 10:09:40,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:09:40,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:09:40,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:09:40,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:09:40,985 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:09:40,986 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:09:46,335 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:09:46,356 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:09:46,356 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 10:09:46,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:09:46 BoogieIcfgContainer [2021-12-15 10:09:46,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:09:46,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:09:46,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:09:46,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:09:46,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:09:37" (1/3) ... [2021-12-15 10:09:46,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a52d34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:09:46, skipping insertion in model container [2021-12-15 10:09:46,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:39" (2/3) ... [2021-12-15 10:09:46,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a52d34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:09:46, skipping insertion in model container [2021-12-15 10:09:46,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:09:46" (3/3) ... [2021-12-15 10:09:46,367 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label51.c [2021-12-15 10:09:46,370 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:09:46,370 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:09:46,414 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:09:46,419 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 10:09:46,419 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:09:46,450 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:46,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 10:09:46,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:09:46,455 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:09:46,455 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:09:46,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:09:46,459 INFO L85 PathProgramCache]: Analyzing trace with hash 156847385, now seen corresponding path program 1 times [2021-12-15 10:09:46,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:09:46,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931714868] [2021-12-15 10:09:46,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:09:46,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:09:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:09:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:09:46,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:09:46,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931714868] [2021-12-15 10:09:46,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931714868] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:09:46,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:09:46,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:09:46,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489661786] [2021-12-15 10:09:46,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:09:46,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:09:46,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:09:46,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:09:46,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:09:46,654 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 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 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:52,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:09:52,662 INFO L93 Difference]: Finished difference Result 4957 states and 9398 transitions. [2021-12-15 10:09:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:09:52,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-15 10:09:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:09:52,699 INFO L225 Difference]: With dead ends: 4957 [2021-12-15 10:09:52,699 INFO L226 Difference]: Without dead ends: 3129 [2021-12-15 10:09:52,708 INFO L932 BasicCegarLoop]: 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 [2021-12-15 10:09:52,710 INFO L933 BasicCegarLoop]: 1373 mSDtfsCounter, 1609 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 4344 mSolverCounterSat, 1517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1609 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 5861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 4344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-15 10:09:52,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1609 Valid, 1595 Invalid, 5861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1517 Valid, 4344 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-15 10:09:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2021-12-15 10:09:52,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3108. [2021-12-15 10:09:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 1.6012230447376892) internal successors, (4975), 3107 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:52,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4975 transitions. [2021-12-15 10:09:52,810 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4975 transitions. Word has length 17 [2021-12-15 10:09:52,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:09:52,811 INFO L470 AbstractCegarLoop]: Abstraction has 3108 states and 4975 transitions. [2021-12-15 10:09:52,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:52,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4975 transitions. [2021-12-15 10:09:52,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-15 10:09:52,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:09:52,814 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 10:09:52,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:09:52,815 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:09:52,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:09:52,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1541486348, now seen corresponding path program 1 times [2021-12-15 10:09:52,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:09:52,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141854852] [2021-12-15 10:09:52,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:09:52,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:09:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:09:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:09:52,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:09:52,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141854852] [2021-12-15 10:09:52,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141854852] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:09:52,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:09:52,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:09:52,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613714491] [2021-12-15 10:09:52,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:09:52,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:09:52,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:09:52,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:09:52,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:09:52,905 INFO L87 Difference]: Start difference. First operand 3108 states and 4975 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:58,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:09:58,541 INFO L93 Difference]: Finished difference Result 9153 states and 14687 transitions. [2021-12-15 10:09:58,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:09:58,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-15 10:09:58,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:09:58,560 INFO L225 Difference]: With dead ends: 9153 [2021-12-15 10:09:58,560 INFO L226 Difference]: Without dead ends: 6047 [2021-12-15 10:09:58,564 INFO L932 BasicCegarLoop]: 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 [2021-12-15 10:09:58,565 INFO L933 BasicCegarLoop]: 1344 mSDtfsCounter, 1783 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 4197 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1783 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 5627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-15 10:09:58,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1783 Valid, 1618 Invalid, 5627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4197 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-15 10:09:58,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6047 states. [2021-12-15 10:09:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6047 to 6031. [2021-12-15 10:09:58,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6031 states, 6030 states have (on average 1.4029850746268657) internal successors, (8460), 6030 states have internal predecessors, (8460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:58,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6031 states to 6031 states and 8460 transitions. [2021-12-15 10:09:58,656 INFO L78 Accepts]: Start accepts. Automaton has 6031 states and 8460 transitions. Word has length 84 [2021-12-15 10:09:58,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:09:58,658 INFO L470 AbstractCegarLoop]: Abstraction has 6031 states and 8460 transitions. [2021-12-15 10:09:58,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:09:58,658 INFO L276 IsEmpty]: Start isEmpty. Operand 6031 states and 8460 transitions. [2021-12-15 10:09:58,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-15 10:09:58,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:09:58,665 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 10:09:58,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 10:09:58,666 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:09:58,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:09:58,667 INFO L85 PathProgramCache]: Analyzing trace with hash 301543392, now seen corresponding path program 1 times [2021-12-15 10:09:58,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:09:58,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555261069] [2021-12-15 10:09:58,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:09:58,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:09:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:09:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:09:58,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:09:58,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555261069] [2021-12-15 10:09:58,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555261069] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:09:58,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:09:58,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:09:58,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004122952] [2021-12-15 10:09:58,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:09:58,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:09:58,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:09:58,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:09:58,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:09:58,799 INFO L87 Difference]: Start difference. First operand 6031 states and 8460 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:07,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:10:07,222 INFO L93 Difference]: Finished difference Result 19026 states and 26262 transitions. [2021-12-15 10:10:07,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:10:07,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-12-15 10:10:07,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:10:07,259 INFO L225 Difference]: With dead ends: 19026 [2021-12-15 10:10:07,259 INFO L226 Difference]: Without dead ends: 12997 [2021-12-15 10:10:07,268 INFO L932 BasicCegarLoop]: 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 [2021-12-15 10:10:07,275 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 4260 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 9634 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4260 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 10840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 9634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:10:07,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4260 Valid, 1207 Invalid, 10840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1206 Valid, 9634 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2021-12-15 10:10:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12997 states. [2021-12-15 10:10:07,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12997 to 12911. [2021-12-15 10:10:07,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12911 states, 12910 states have (on average 1.346243222308288) internal successors, (17380), 12910 states have internal predecessors, (17380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:07,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12911 states to 12911 states and 17380 transitions. [2021-12-15 10:10:07,484 INFO L78 Accepts]: Start accepts. Automaton has 12911 states and 17380 transitions. Word has length 86 [2021-12-15 10:10:07,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:10:07,486 INFO L470 AbstractCegarLoop]: Abstraction has 12911 states and 17380 transitions. [2021-12-15 10:10:07,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:07,486 INFO L276 IsEmpty]: Start isEmpty. Operand 12911 states and 17380 transitions. [2021-12-15 10:10:07,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-12-15 10:10:07,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:10:07,494 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:10:07,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 10:10:07,494 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:10:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:10:07,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1694384088, now seen corresponding path program 1 times [2021-12-15 10:10:07,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:10:07,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728193676] [2021-12-15 10:10:07,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:07,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:10:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:07,760 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:10:07,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:10:07,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728193676] [2021-12-15 10:10:07,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728193676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:10:07,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:10:07,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:10:07,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513360508] [2021-12-15 10:10:07,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:10:07,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:10:07,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:10:07,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:10:07,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:10:07,773 INFO L87 Difference]: Start difference. First operand 12911 states and 17380 transitions. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:12,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:10:12,098 INFO L93 Difference]: Finished difference Result 24486 states and 33412 transitions. [2021-12-15 10:10:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:10:12,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 321 [2021-12-15 10:10:12,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:10:12,125 INFO L225 Difference]: With dead ends: 24486 [2021-12-15 10:10:12,126 INFO L226 Difference]: Without dead ends: 12911 [2021-12-15 10:10:12,137 INFO L932 BasicCegarLoop]: 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 [2021-12-15 10:10:12,138 INFO L933 BasicCegarLoop]: 1771 mSDtfsCounter, 1153 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5716 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 5724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:10:12,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 1950 Invalid, 5724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5716 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-15 10:10:12,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12911 states. [2021-12-15 10:10:12,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12911 to 12911. [2021-12-15 10:10:12,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12911 states, 12910 states have (on average 1.3455460883036405) internal successors, (17371), 12910 states have internal predecessors, (17371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12911 states to 12911 states and 17371 transitions. [2021-12-15 10:10:12,324 INFO L78 Accepts]: Start accepts. Automaton has 12911 states and 17371 transitions. Word has length 321 [2021-12-15 10:10:12,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:10:12,326 INFO L470 AbstractCegarLoop]: Abstraction has 12911 states and 17371 transitions. [2021-12-15 10:10:12,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:12,326 INFO L276 IsEmpty]: Start isEmpty. Operand 12911 states and 17371 transitions. [2021-12-15 10:10:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2021-12-15 10:10:12,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:10:12,332 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:10:12,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 10:10:12,332 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:10:12,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:10:12,334 INFO L85 PathProgramCache]: Analyzing trace with hash 576370070, now seen corresponding path program 1 times [2021-12-15 10:10:12,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:10:12,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035823785] [2021-12-15 10:10:12,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:12,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:10:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:10:12,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:10:12,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035823785] [2021-12-15 10:10:12,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035823785] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:10:12,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864455172] [2021-12-15 10:10:12,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:12,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:10:12,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:10:12,628 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) [2021-12-15 10:10:12,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 10:10:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:12,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:10:12,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:10:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 10:10:13,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:10:13,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864455172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:10:13,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:10:13,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 10:10:13,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108045132] [2021-12-15 10:10:13,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:10:13,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:10:13,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:10:13,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:10:13,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:10:13,684 INFO L87 Difference]: Start difference. First operand 12911 states and 17371 transitions. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 2 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:19,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:10:19,491 INFO L93 Difference]: Finished difference Result 35414 states and 48549 transitions. [2021-12-15 10:10:19,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:10:19,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 2 states have internal predecessors, (482), 0 states have call successors, (0), 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 495 [2021-12-15 10:10:19,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:10:19,528 INFO L225 Difference]: With dead ends: 35414 [2021-12-15 10:10:19,529 INFO L226 Difference]: Without dead ends: 23870 [2021-12-15 10:10:19,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:10:19,542 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 1016 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4888 mSolverCounterSat, 1027 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 1771 SdHoareTripleChecker+Invalid, 5915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1027 IncrementalHoareTripleChecker+Valid, 4888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-15 10:10:19,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1016 Valid, 1771 Invalid, 5915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1027 Valid, 4888 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-15 10:10:19,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23870 states. [2021-12-15 10:10:19,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23870 to 23866. [2021-12-15 10:10:19,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23866 states, 23865 states have (on average 1.2676304211187932) internal successors, (30252), 23865 states have internal predecessors, (30252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:19,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23866 states to 23866 states and 30252 transitions. [2021-12-15 10:10:19,781 INFO L78 Accepts]: Start accepts. Automaton has 23866 states and 30252 transitions. Word has length 495 [2021-12-15 10:10:19,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:10:19,787 INFO L470 AbstractCegarLoop]: Abstraction has 23866 states and 30252 transitions. [2021-12-15 10:10:19,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 2 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:19,787 INFO L276 IsEmpty]: Start isEmpty. Operand 23866 states and 30252 transitions. [2021-12-15 10:10:19,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2021-12-15 10:10:19,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:10:19,794 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:10:19,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 10:10:20,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:10:20,011 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:10:20,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:10:20,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1430526312, now seen corresponding path program 1 times [2021-12-15 10:10:20,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:10:20,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693196635] [2021-12-15 10:10:20,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:20,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:10:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-15 10:10:20,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:10:20,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693196635] [2021-12-15 10:10:20,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693196635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:10:20,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:10:20,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:10:20,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321045069] [2021-12-15 10:10:20,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:10:20,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:10:20,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:10:20,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:10:20,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:10:20,206 INFO L87 Difference]: Start difference. First operand 23866 states and 30252 transitions. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 2 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:24,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:10:24,650 INFO L93 Difference]: Finished difference Result 55931 states and 70570 transitions. [2021-12-15 10:10:24,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:10:24,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 2 states have internal predecessors, (497), 0 states have call successors, (0), 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 569 [2021-12-15 10:10:24,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:10:24,691 INFO L225 Difference]: With dead ends: 55931 [2021-12-15 10:10:24,692 INFO L226 Difference]: Without dead ends: 33432 [2021-12-15 10:10:24,709 INFO L932 BasicCegarLoop]: 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 [2021-12-15 10:10:24,712 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 1396 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 3927 mSolverCounterSat, 1671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 5598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1671 IncrementalHoareTripleChecker+Valid, 3927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:10:24,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1396 Valid, 754 Invalid, 5598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1671 Valid, 3927 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-15 10:10:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33432 states. [2021-12-15 10:10:24,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33432 to 33422. [2021-12-15 10:10:24,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33422 states, 33421 states have (on average 1.2002932288082344) internal successors, (40115), 33421 states have internal predecessors, (40115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:25,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33422 states to 33422 states and 40115 transitions. [2021-12-15 10:10:25,028 INFO L78 Accepts]: Start accepts. Automaton has 33422 states and 40115 transitions. Word has length 569 [2021-12-15 10:10:25,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:10:25,029 INFO L470 AbstractCegarLoop]: Abstraction has 33422 states and 40115 transitions. [2021-12-15 10:10:25,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 2 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:25,029 INFO L276 IsEmpty]: Start isEmpty. Operand 33422 states and 40115 transitions. [2021-12-15 10:10:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2021-12-15 10:10:25,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:10:25,038 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:10:25,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 10:10:25,038 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:10:25,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:10:25,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1447256831, now seen corresponding path program 1 times [2021-12-15 10:10:25,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:10:25,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373473560] [2021-12-15 10:10:25,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:25,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:10:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-15 10:10:25,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:10:25,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373473560] [2021-12-15 10:10:25,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373473560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:10:25,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:10:25,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:10:25,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113868252] [2021-12-15 10:10:25,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:10:25,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:10:25,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:10:25,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:10:25,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:10:25,210 INFO L87 Difference]: Start difference. First operand 33422 states and 40115 transitions. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 2 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:30,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:10:30,667 INFO L93 Difference]: Finished difference Result 97081 states and 116999 transitions. [2021-12-15 10:10:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:10:30,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 2 states have internal predecessors, (497), 0 states have call successors, (0), 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 572 [2021-12-15 10:10:30,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:10:30,828 INFO L225 Difference]: With dead ends: 97081 [2021-12-15 10:10:30,829 INFO L226 Difference]: Without dead ends: 65026 [2021-12-15 10:10:30,890 INFO L932 BasicCegarLoop]: 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 [2021-12-15 10:10:30,895 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 2119 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 5113 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2119 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 5547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 5113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:10:30,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2119 Valid, 982 Invalid, 5547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 5113 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-15 10:10:30,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65026 states. [2021-12-15 10:10:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65026 to 60928. [2021-12-15 10:10:31,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60928 states, 60927 states have (on average 1.1845979614949038) internal successors, (72174), 60927 states have internal predecessors, (72174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:31,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60928 states to 60928 states and 72174 transitions. [2021-12-15 10:10:31,488 INFO L78 Accepts]: Start accepts. Automaton has 60928 states and 72174 transitions. Word has length 572 [2021-12-15 10:10:31,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:10:31,489 INFO L470 AbstractCegarLoop]: Abstraction has 60928 states and 72174 transitions. [2021-12-15 10:10:31,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 2 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:31,489 INFO L276 IsEmpty]: Start isEmpty. Operand 60928 states and 72174 transitions. [2021-12-15 10:10:31,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 703 [2021-12-15 10:10:31,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:10:31,494 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:10:31,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 10:10:31,494 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:10:31,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:10:31,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1794209506, now seen corresponding path program 1 times [2021-12-15 10:10:31,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:10:31,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044675909] [2021-12-15 10:10:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:31,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:10:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-12-15 10:10:31,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:10:31,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044675909] [2021-12-15 10:10:31,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044675909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:10:31,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:10:31,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:10:31,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622515947] [2021-12-15 10:10:31,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:10:31,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:10:31,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:10:31,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:10:31,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:10:31,736 INFO L87 Difference]: Start difference. First operand 60928 states and 72174 transitions. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:37,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:10:37,117 INFO L93 Difference]: Finished difference Result 140996 states and 169105 transitions. [2021-12-15 10:10:37,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:10:37,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 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 702 [2021-12-15 10:10:37,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:10:37,213 INFO L225 Difference]: With dead ends: 140996 [2021-12-15 10:10:37,214 INFO L226 Difference]: Without dead ends: 81435 [2021-12-15 10:10:37,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:10:37,239 INFO L933 BasicCegarLoop]: 817 mSDtfsCounter, 1774 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4032 mSolverCounterSat, 1979 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1774 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 6011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1979 IncrementalHoareTripleChecker+Valid, 4032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:10:37,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1774 Valid, 901 Invalid, 6011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1979 Valid, 4032 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-15 10:10:37,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81435 states. [2021-12-15 10:10:37,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81435 to 77327. [2021-12-15 10:10:37,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77327 states, 77326 states have (on average 1.2019889817137832) internal successors, (92945), 77326 states have internal predecessors, (92945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:37,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77327 states to 77327 states and 92945 transitions. [2021-12-15 10:10:37,939 INFO L78 Accepts]: Start accepts. Automaton has 77327 states and 92945 transitions. Word has length 702 [2021-12-15 10:10:37,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:10:37,940 INFO L470 AbstractCegarLoop]: Abstraction has 77327 states and 92945 transitions. [2021-12-15 10:10:37,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:37,940 INFO L276 IsEmpty]: Start isEmpty. Operand 77327 states and 92945 transitions. [2021-12-15 10:10:37,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 715 [2021-12-15 10:10:37,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:10:37,945 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-12-15 10:10:37,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 10:10:37,946 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:10:37,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:10:37,946 INFO L85 PathProgramCache]: Analyzing trace with hash -702159876, now seen corresponding path program 1 times [2021-12-15 10:10:37,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:10:37,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736971615] [2021-12-15 10:10:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:37,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:10:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-12-15 10:10:38,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:10:38,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736971615] [2021-12-15 10:10:38,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736971615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:10:38,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:10:38,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:10:38,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165924003] [2021-12-15 10:10:38,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:10:38,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:10:38,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:10:38,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:10:38,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:10:38,255 INFO L87 Difference]: Start difference. First operand 77327 states and 92945 transitions. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 2 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:10:42,389 INFO L93 Difference]: Finished difference Result 161485 states and 193141 transitions. [2021-12-15 10:10:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:10:42,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 2 states have internal predecessors, (497), 0 states have call successors, (0), 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 714 [2021-12-15 10:10:42,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:10:42,483 INFO L225 Difference]: With dead ends: 161485 [2021-12-15 10:10:42,483 INFO L226 Difference]: Without dead ends: 85525 [2021-12-15 10:10:42,532 INFO L932 BasicCegarLoop]: 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 [2021-12-15 10:10:42,532 INFO L933 BasicCegarLoop]: 1649 mSDtfsCounter, 989 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 4423 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 1837 SdHoareTripleChecker+Invalid, 4428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 4423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-15 10:10:42,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [989 Valid, 1837 Invalid, 4428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 4423 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-15 10:10:42,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85525 states. [2021-12-15 10:10:43,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85525 to 85523. [2021-12-15 10:10:43,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85523 states, 85522 states have (on average 1.1871331353335983) internal successors, (101526), 85522 states have internal predecessors, (101526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:43,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85523 states to 85523 states and 101526 transitions. [2021-12-15 10:10:43,292 INFO L78 Accepts]: Start accepts. Automaton has 85523 states and 101526 transitions. Word has length 714 [2021-12-15 10:10:43,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:10:43,292 INFO L470 AbstractCegarLoop]: Abstraction has 85523 states and 101526 transitions. [2021-12-15 10:10:43,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 2 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:43,293 INFO L276 IsEmpty]: Start isEmpty. Operand 85523 states and 101526 transitions. [2021-12-15 10:10:43,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 869 [2021-12-15 10:10:43,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:10:43,300 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:10:43,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 10:10:43,301 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:10:43,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:10:43,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1885001371, now seen corresponding path program 1 times [2021-12-15 10:10:43,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:10:43,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201962049] [2021-12-15 10:10:43,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:43,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:10:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 407 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-12-15 10:10:43,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:10:43,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201962049] [2021-12-15 10:10:43,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201962049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:10:43,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:10:43,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 10:10:43,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209315166] [2021-12-15 10:10:43,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:10:43,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:10:43,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:10:43,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:10:43,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:10:43,528 INFO L87 Difference]: Start difference. First operand 85523 states and 101526 transitions. Second operand has 4 states, 4 states have (on average 161.5) internal successors, (646), 4 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)