./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label45.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/Problem12_label45.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 8467039cd3b163d296fd08bc696cd2f7637ba962b4c476281adfe8f379f9ad63 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:40:36,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:40:36,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:40:36,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:40:36,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:40:36,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:40:36,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:40:36,959 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:40:36,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:40:36,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:40:36,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:40:36,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:40:36,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:40:36,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:40:36,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:40:36,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:40:36,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:40:36,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:40:36,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:40:36,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:40:36,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:40:36,973 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:40:36,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:40:36,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:40:36,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:40:36,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:40:36,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:40:36,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:40:36,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:40:36,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:40:36,980 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:40:36,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:40:36,981 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:40:36,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:40:36,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:40:36,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:40:36,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:40:36,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:40:36,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:40:36,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:40:36,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:40:36,987 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:40:37,010 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:40:37,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:40:37,011 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:40:37,011 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:40:37,012 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:40:37,012 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:40:37,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:40:37,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:40:37,013 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:40:37,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:40:37,014 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:40:37,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:40:37,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:40:37,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:40:37,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:40:37,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:40:37,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:40:37,015 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:40:37,015 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:40:37,016 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:40:37,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:40:37,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:40:37,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:40:37,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:40:37,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:40:37,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:40:37,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:40:37,018 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:40:37,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:40:37,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:40:37,018 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:40:37,019 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:40:37,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:40:37,019 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:40:37,019 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8467039cd3b163d296fd08bc696cd2f7637ba962b4c476281adfe8f379f9ad63 [2021-12-15 09:40:37,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:40:37,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:40:37,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:40:37,280 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:40:37,281 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:40:37,282 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label45.c [2021-12-15 09:40:37,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/777d246fc/8b6101c943ab4d409fb06b22590ce8f8/FLAG0b6971bd9 [2021-12-15 09:40:37,957 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:40:37,959 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label45.c [2021-12-15 09:40:37,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/777d246fc/8b6101c943ab4d409fb06b22590ce8f8/FLAG0b6971bd9 [2021-12-15 09:40:38,322 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/777d246fc/8b6101c943ab4d409fb06b22590ce8f8 [2021-12-15 09:40:38,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:40:38,325 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:40:38,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:40:38,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:40:38,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:40:38,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:40:38" (1/1) ... [2021-12-15 09:40:38,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@739e1d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:38, skipping insertion in model container [2021-12-15 09:40:38,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:40:38" (1/1) ... [2021-12-15 09:40:38,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:40:38,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:40:38,715 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label45.c[6354,6367] [2021-12-15 09:40:39,327 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:40:39,334 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:40:39,353 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label45.c[6354,6367] [2021-12-15 09:40:39,752 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:40:39,771 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:40:39,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:39 WrapperNode [2021-12-15 09:40:39,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:40:39,773 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:40:39,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:40:39,773 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:40:39,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:39" (1/1) ... [2021-12-15 09:40:39,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:39" (1/1) ... [2021-12-15 09:40:40,128 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-15 09:40:40,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:40:40,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:40:40,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:40:40,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:40:40,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:39" (1/1) ... [2021-12-15 09:40:40,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:39" (1/1) ... [2021-12-15 09:40:40,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:39" (1/1) ... [2021-12-15 09:40:40,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:39" (1/1) ... [2021-12-15 09:40:40,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:39" (1/1) ... [2021-12-15 09:40:40,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:39" (1/1) ... [2021-12-15 09:40:40,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:39" (1/1) ... [2021-12-15 09:40:40,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:40:40,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:40:40,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:40:40,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:40:40,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:39" (1/1) ... [2021-12-15 09:40:40,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:40:40,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:40:40,564 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 09:40:40,590 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 09:40:40,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:40:40,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:40:40,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:40:40,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:40:40,681 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:40:40,682 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:40:43,874 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:40:43,893 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:40:43,893 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:40:43,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:40:43 BoogieIcfgContainer [2021-12-15 09:40:43,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:40:43,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:40:43,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:40:43,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:40:43,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:40:38" (1/3) ... [2021-12-15 09:40:43,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c12bb26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:40:43, skipping insertion in model container [2021-12-15 09:40:43,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:39" (2/3) ... [2021-12-15 09:40:43,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c12bb26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:40:43, skipping insertion in model container [2021-12-15 09:40:43,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:40:43" (3/3) ... [2021-12-15 09:40:43,905 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label45.c [2021-12-15 09:40:43,909 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:40:43,909 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:40:43,954 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:40:43,959 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 09:40:43,959 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:40:43,983 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 09:40:43,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:43,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:40:43,991 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:43,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:43,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2122806209, now seen corresponding path program 1 times [2021-12-15 09:40:44,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:44,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027455889] [2021-12-15 09:40:44,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:44,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:44,204 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 09:40:44,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:44,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027455889] [2021-12-15 09:40:44,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027455889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:44,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:44,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:40:44,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523962323] [2021-12-15 09:40:44,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:44,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:44,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:44,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:44,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:44,244 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 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 09:40:47,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:47,681 INFO L93 Difference]: Finished difference Result 2404 states and 4645 transitions. [2021-12-15 09:40:47,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:47,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-12-15 09:40:47,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:47,702 INFO L225 Difference]: With dead ends: 2404 [2021-12-15 09:40:47,702 INFO L226 Difference]: Without dead ends: 1506 [2021-12-15 09:40:47,708 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 09:40:47,711 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 769 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:47,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 525 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-15 09:40:47,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-12-15 09:40:47,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-12-15 09:40:47,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6066445182724252) internal successors, (2418), 1505 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2418 transitions. [2021-12-15 09:40:47,852 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2418 transitions. Word has length 51 [2021-12-15 09:40:47,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:47,853 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2418 transitions. [2021-12-15 09:40:47,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 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 09:40:47,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2418 transitions. [2021-12-15 09:40:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-15 09:40:47,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:47,859 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:40:47,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:40:47,859 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:47,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:47,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1292959901, now seen corresponding path program 1 times [2021-12-15 09:40:47,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:47,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894646444] [2021-12-15 09:40:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:47,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:40:48,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:48,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894646444] [2021-12-15 09:40:48,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894646444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:48,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:48,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:48,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601676960] [2021-12-15 09:40:48,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:48,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:40:48,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:48,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:40:48,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:40:48,096 INFO L87 Difference]: Start difference. First operand 1506 states and 2418 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 09:40:51,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:51,034 INFO L93 Difference]: Finished difference Result 3771 states and 5823 transitions. [2021-12-15 09:40:51,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:40:51,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-12-15 09:40:51,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:51,042 INFO L225 Difference]: With dead ends: 3771 [2021-12-15 09:40:51,043 INFO L226 Difference]: Without dead ends: 2267 [2021-12-15 09:40:51,048 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 09:40:51,050 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 1361 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 2911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:51,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1361 Valid, 1645 Invalid, 2911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:40:51,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-12-15 09:40:51,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2257. [2021-12-15 09:40:51,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.4073581560283688) internal successors, (3175), 2256 states have internal predecessors, (3175), 0 states have call successors, (0), 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 09:40:51,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3175 transitions. [2021-12-15 09:40:51,096 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3175 transitions. Word has length 126 [2021-12-15 09:40:51,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:51,098 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3175 transitions. [2021-12-15 09:40:51,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 09:40:51,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3175 transitions. [2021-12-15 09:40:51,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-15 09:40:51,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:51,107 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:40:51,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:40:51,110 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:51,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:51,111 INFO L85 PathProgramCache]: Analyzing trace with hash 732107426, now seen corresponding path program 1 times [2021-12-15 09:40:51,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:51,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600942974] [2021-12-15 09:40:51,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:51,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:40:51,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:51,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600942974] [2021-12-15 09:40:51,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600942974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:51,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:51,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:51,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733781403] [2021-12-15 09:40:51,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:51,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:51,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:51,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:51,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:51,287 INFO L87 Difference]: Start difference. First operand 2257 states and 3175 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 09:40:54,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:54,345 INFO L93 Difference]: Finished difference Result 5263 states and 8006 transitions. [2021-12-15 09:40:54,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:54,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 192 [2021-12-15 09:40:54,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:54,361 INFO L225 Difference]: With dead ends: 5263 [2021-12-15 09:40:54,362 INFO L226 Difference]: Without dead ends: 3759 [2021-12-15 09:40:54,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:54,366 INFO L933 BasicCegarLoop]: 1145 mSDtfsCounter, 712 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2627 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 3065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:54,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 1153 Invalid, 3065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2627 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 09:40:54,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2021-12-15 09:40:54,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3759. [2021-12-15 09:40:54,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.4169771154869613) internal successors, (5325), 3758 states have internal predecessors, (5325), 0 states have call successors, (0), 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 09:40:54,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5325 transitions. [2021-12-15 09:40:54,443 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5325 transitions. Word has length 192 [2021-12-15 09:40:54,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:54,443 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 5325 transitions. [2021-12-15 09:40:54,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 09:40:54,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5325 transitions. [2021-12-15 09:40:54,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-15 09:40:54,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:54,447 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:40:54,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:40:54,447 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:54,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:54,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1803854188, now seen corresponding path program 1 times [2021-12-15 09:40:54,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:54,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674756851] [2021-12-15 09:40:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:54,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:40:54,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:54,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674756851] [2021-12-15 09:40:54,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674756851] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:54,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:54,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:54,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047539163] [2021-12-15 09:40:54,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:54,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:54,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:54,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:54,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:54,593 INFO L87 Difference]: Start difference. First operand 3759 states and 5325 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:57,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:57,311 INFO L93 Difference]: Finished difference Result 8267 states and 12306 transitions. [2021-12-15 09:40:57,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:57,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-12-15 09:40:57,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:57,332 INFO L225 Difference]: With dead ends: 8267 [2021-12-15 09:40:57,332 INFO L226 Difference]: Without dead ends: 5261 [2021-12-15 09:40:57,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:57,347 INFO L933 BasicCegarLoop]: 1162 mSDtfsCounter, 739 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2417 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 3069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:57,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 1170 Invalid, 3069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2417 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 09:40:57,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2021-12-15 09:40:57,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5261. [2021-12-15 09:40:57,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.423384030418251) internal successors, (7487), 5260 states have internal predecessors, (7487), 0 states have call successors, (0), 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 09:40:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 7487 transitions. [2021-12-15 09:40:57,438 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 7487 transitions. Word has length 196 [2021-12-15 09:40:57,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:57,438 INFO L470 AbstractCegarLoop]: Abstraction has 5261 states and 7487 transitions. [2021-12-15 09:40:57,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:57,439 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 7487 transitions. [2021-12-15 09:40:57,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-15 09:40:57,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:57,441 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:40:57,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:40:57,442 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:57,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:57,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1542879967, now seen corresponding path program 1 times [2021-12-15 09:40:57,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:57,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145531232] [2021-12-15 09:40:57,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:57,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 09:40:57,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:57,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145531232] [2021-12-15 09:40:57,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145531232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:57,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:57,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:57,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979153375] [2021-12-15 09:40:57,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:57,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:40:57,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:57,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:40:57,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:40:57,570 INFO L87 Difference]: Start difference. First operand 5261 states and 7487 transitions. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:41:00,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:00,481 INFO L93 Difference]: Finished difference Result 12059 states and 17093 transitions. [2021-12-15 09:41:00,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:41:00,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-12-15 09:41:00,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:00,503 INFO L225 Difference]: With dead ends: 12059 [2021-12-15 09:41:00,503 INFO L226 Difference]: Without dead ends: 7514 [2021-12-15 09:41:00,509 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 09:41:00,509 INFO L933 BasicCegarLoop]: 688 mSDtfsCounter, 690 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3797 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 3797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:00,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 706 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 3797 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:41:00,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7514 states. [2021-12-15 09:41:00,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7514 to 7514. [2021-12-15 09:41:00,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7514 states, 7513 states have (on average 1.307467057101025) internal successors, (9823), 7513 states have internal predecessors, (9823), 0 states have call successors, (0), 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 09:41:00,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7514 states to 7514 states and 9823 transitions. [2021-12-15 09:41:00,619 INFO L78 Accepts]: Start accepts. Automaton has 7514 states and 9823 transitions. Word has length 205 [2021-12-15 09:41:00,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:00,620 INFO L470 AbstractCegarLoop]: Abstraction has 7514 states and 9823 transitions. [2021-12-15 09:41:00,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:41:00,623 INFO L276 IsEmpty]: Start isEmpty. Operand 7514 states and 9823 transitions. [2021-12-15 09:41:00,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-12-15 09:41:00,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:00,626 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:41:00,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:41:00,627 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:00,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1523033645, now seen corresponding path program 1 times [2021-12-15 09:41:00,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:00,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390276169] [2021-12-15 09:41:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:00,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-15 09:41:00,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:00,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390276169] [2021-12-15 09:41:00,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390276169] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:00,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:00,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:41:00,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387485572] [2021-12-15 09:41:00,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:00,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:00,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:00,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:00,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:00,733 INFO L87 Difference]: Start difference. First operand 7514 states and 9823 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:41:03,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:03,066 INFO L93 Difference]: Finished difference Result 20283 states and 27139 transitions. [2021-12-15 09:41:03,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:03,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 261 [2021-12-15 09:41:03,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:03,098 INFO L225 Difference]: With dead ends: 20283 [2021-12-15 09:41:03,098 INFO L226 Difference]: Without dead ends: 13522 [2021-12-15 09:41:03,107 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 09:41:03,108 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 679 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1980 mSolverCounterSat, 856 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 856 IncrementalHoareTripleChecker+Valid, 1980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:03,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 456 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [856 Valid, 1980 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:41:03,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13522 states. [2021-12-15 09:41:03,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13522 to 12771. [2021-12-15 09:41:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12771 states, 12770 states have (on average 1.2398590446358653) internal successors, (15833), 12770 states have internal predecessors, (15833), 0 states have call successors, (0), 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 09:41:03,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12771 states to 12771 states and 15833 transitions. [2021-12-15 09:41:03,356 INFO L78 Accepts]: Start accepts. Automaton has 12771 states and 15833 transitions. Word has length 261 [2021-12-15 09:41:03,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:03,357 INFO L470 AbstractCegarLoop]: Abstraction has 12771 states and 15833 transitions. [2021-12-15 09:41:03,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:41:03,358 INFO L276 IsEmpty]: Start isEmpty. Operand 12771 states and 15833 transitions. [2021-12-15 09:41:03,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-12-15 09:41:03,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:03,362 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:41:03,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:41:03,362 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:03,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:03,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1105864026, now seen corresponding path program 1 times [2021-12-15 09:41:03,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:03,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148399999] [2021-12-15 09:41:03,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:03,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 138 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:41:03,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:03,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148399999] [2021-12-15 09:41:03,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148399999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:41:03,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257117896] [2021-12-15 09:41:03,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:03,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:41:03,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:41:03,531 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 09:41:03,532 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 09:41:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:03,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:41:03,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:41:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:41:04,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:41:04,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257117896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:04,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:41:04,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 09:41:04,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504305213] [2021-12-15 09:41:04,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:04,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:04,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:04,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:04,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:41:04,148 INFO L87 Difference]: Start difference. First operand 12771 states and 15833 transitions. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 09:41:06,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:06,775 INFO L93 Difference]: Finished difference Result 32299 states and 40960 transitions. [2021-12-15 09:41:06,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:06,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 279 [2021-12-15 09:41:06,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:06,813 INFO L225 Difference]: With dead ends: 32299 [2021-12-15 09:41:06,813 INFO L226 Difference]: Without dead ends: 20281 [2021-12-15 09:41:06,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:41:06,829 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 907 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:06,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 309 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 2072 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:41:06,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20281 states. [2021-12-15 09:41:07,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20281 to 20281. [2021-12-15 09:41:07,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20281 states, 20280 states have (on average 1.2012820512820512) internal successors, (24362), 20280 states have internal predecessors, (24362), 0 states have call successors, (0), 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 09:41:07,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20281 states to 20281 states and 24362 transitions. [2021-12-15 09:41:07,091 INFO L78 Accepts]: Start accepts. Automaton has 20281 states and 24362 transitions. Word has length 279 [2021-12-15 09:41:07,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:07,092 INFO L470 AbstractCegarLoop]: Abstraction has 20281 states and 24362 transitions. [2021-12-15 09:41:07,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 09:41:07,093 INFO L276 IsEmpty]: Start isEmpty. Operand 20281 states and 24362 transitions. [2021-12-15 09:41:07,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-15 09:41:07,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:07,098 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:41:07,122 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 09:41:07,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:41:07,312 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:07,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:07,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1785263591, now seen corresponding path program 1 times [2021-12-15 09:41:07,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:07,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028530354] [2021-12-15 09:41:07,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:07,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-15 09:41:07,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:07,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028530354] [2021-12-15 09:41:07,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028530354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:07,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:07,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:41:07,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479560667] [2021-12-15 09:41:07,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:07,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:07,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:07,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:07,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:07,502 INFO L87 Difference]: Start difference. First operand 20281 states and 24362 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:41:09,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:09,891 INFO L93 Difference]: Finished difference Result 48070 states and 57083 transitions. [2021-12-15 09:41:09,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:09,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 328 [2021-12-15 09:41:09,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:09,943 INFO L225 Difference]: With dead ends: 48070 [2021-12-15 09:41:09,943 INFO L226 Difference]: Without dead ends: 28542 [2021-12-15 09:41:09,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 09:41:09,969 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 820 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2137 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 2732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 2137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:09,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 906 Invalid, 2732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 2137 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:41:09,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28542 states. [2021-12-15 09:41:10,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28542 to 26289. [2021-12-15 09:41:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26289 states, 26288 states have (on average 1.1536062081558125) internal successors, (30326), 26288 states have internal predecessors, (30326), 0 states have call successors, (0), 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 09:41:10,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26289 states to 26289 states and 30326 transitions. [2021-12-15 09:41:10,300 INFO L78 Accepts]: Start accepts. Automaton has 26289 states and 30326 transitions. Word has length 328 [2021-12-15 09:41:10,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:10,301 INFO L470 AbstractCegarLoop]: Abstraction has 26289 states and 30326 transitions. [2021-12-15 09:41:10,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:41:10,301 INFO L276 IsEmpty]: Start isEmpty. Operand 26289 states and 30326 transitions. [2021-12-15 09:41:10,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-12-15 09:41:10,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:10,311 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:41:10,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:41:10,311 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:10,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:10,312 INFO L85 PathProgramCache]: Analyzing trace with hash -904864979, now seen corresponding path program 1 times [2021-12-15 09:41:10,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:10,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856378584] [2021-12-15 09:41:10,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:10,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:41:10,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:10,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856378584] [2021-12-15 09:41:10,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856378584] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:41:10,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907533155] [2021-12-15 09:41:10,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:10,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:41:10,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:41:10,475 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:41:10,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:41:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:10,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:41:10,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:41:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-15 09:41:11,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:41:11,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907533155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:11,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:41:11,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:41:11,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054612194] [2021-12-15 09:41:11,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:11,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:11,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:11,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:11,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:41:11,217 INFO L87 Difference]: Start difference. First operand 26289 states and 30326 transitions. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 2 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:41:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:13,847 INFO L93 Difference]: Finished difference Result 73604 states and 85107 transitions. [2021-12-15 09:41:13,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:13,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 2 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-12-15 09:41:13,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:13,916 INFO L225 Difference]: With dead ends: 73604 [2021-12-15 09:41:13,916 INFO L226 Difference]: Without dead ends: 48068 [2021-12-15 09:41:13,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 355 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 09:41:13,943 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 474 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2325 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 2891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 2325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:13,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 551 Invalid, 2891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 2325 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:41:13,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48068 states. [2021-12-15 09:41:14,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48068 to 42060. [2021-12-15 09:41:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42060 states, 42059 states have (on average 1.1284861741838845) internal successors, (47463), 42059 states have internal predecessors, (47463), 0 states have call successors, (0), 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 09:41:14,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42060 states to 42060 states and 47463 transitions. [2021-12-15 09:41:14,467 INFO L78 Accepts]: Start accepts. Automaton has 42060 states and 47463 transitions. Word has length 356 [2021-12-15 09:41:14,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:14,468 INFO L470 AbstractCegarLoop]: Abstraction has 42060 states and 47463 transitions. [2021-12-15 09:41:14,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 2 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:41:14,468 INFO L276 IsEmpty]: Start isEmpty. Operand 42060 states and 47463 transitions. [2021-12-15 09:41:14,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2021-12-15 09:41:14,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:14,491 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:41:14,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:41:14,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-15 09:41:14,708 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:14,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:14,708 INFO L85 PathProgramCache]: Analyzing trace with hash -202015512, now seen corresponding path program 1 times [2021-12-15 09:41:14,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:14,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042542620] [2021-12-15 09:41:14,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:14,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 707 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-15 09:41:14,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:14,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042542620] [2021-12-15 09:41:14,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042542620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:14,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:14,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:41:14,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836970460] [2021-12-15 09:41:14,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:14,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:14,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:14,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:14,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:14,867 INFO L87 Difference]: Start difference. First operand 42060 states and 47463 transitions. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 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 09:41:17,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:17,560 INFO L93 Difference]: Finished difference Result 87122 states and 97997 transitions. [2021-12-15 09:41:17,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:17,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 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 551 [2021-12-15 09:41:17,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:17,625 INFO L225 Difference]: With dead ends: 87122 [2021-12-15 09:41:17,626 INFO L226 Difference]: Without dead ends: 45815 [2021-12-15 09:41:17,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:17,656 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 663 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:17,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 164 Invalid, 2988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 2274 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:41:17,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45815 states. [2021-12-15 09:41:17,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45815 to 42060. [2021-12-15 09:41:18,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42060 states, 42059 states have (on average 1.1243015763570223) internal successors, (47287), 42059 states have internal predecessors, (47287), 0 states have call successors, (0), 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 09:41:18,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42060 states to 42060 states and 47287 transitions. [2021-12-15 09:41:18,072 INFO L78 Accepts]: Start accepts. Automaton has 42060 states and 47287 transitions. Word has length 551 [2021-12-15 09:41:18,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:18,073 INFO L470 AbstractCegarLoop]: Abstraction has 42060 states and 47287 transitions. [2021-12-15 09:41:18,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 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 09:41:18,074 INFO L276 IsEmpty]: Start isEmpty. Operand 42060 states and 47287 transitions. [2021-12-15 09:41:18,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2021-12-15 09:41:18,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:18,090 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:41:18,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:41:18,090 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:18,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:18,091 INFO L85 PathProgramCache]: Analyzing trace with hash -515885921, now seen corresponding path program 1 times [2021-12-15 09:41:18,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:18,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31121808] [2021-12-15 09:41:18,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:18,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 394 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-15 09:41:18,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:18,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31121808] [2021-12-15 09:41:18,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31121808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:18,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:18,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:41:18,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692806055] [2021-12-15 09:41:18,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:18,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:18,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:18,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:18,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:18,260 INFO L87 Difference]: Start difference. First operand 42060 states and 47287 transitions. Second operand has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 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 09:41:21,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:21,160 INFO L93 Difference]: Finished difference Result 104395 states and 118604 transitions. [2021-12-15 09:41:21,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:21,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 559 [2021-12-15 09:41:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:21,238 INFO L225 Difference]: With dead ends: 104395 [2021-12-15 09:41:21,239 INFO L226 Difference]: Without dead ends: 63088 [2021-12-15 09:41:21,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:21,277 INFO L933 BasicCegarLoop]: 594 mSDtfsCounter, 704 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2347 mSolverCounterSat, 580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 2347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:21,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 601 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 2347 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 09:41:21,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63088 states. [2021-12-15 09:41:21,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63088 to 60835. [2021-12-15 09:41:21,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60835 states, 60834 states have (on average 1.1247328796396752) internal successors, (68422), 60834 states have internal predecessors, (68422), 0 states have call successors, (0), 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 09:41:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60835 states to 60835 states and 68422 transitions. [2021-12-15 09:41:22,152 INFO L78 Accepts]: Start accepts. Automaton has 60835 states and 68422 transitions. Word has length 559 [2021-12-15 09:41:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:22,152 INFO L470 AbstractCegarLoop]: Abstraction has 60835 states and 68422 transitions. [2021-12-15 09:41:22,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 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 09:41:22,153 INFO L276 IsEmpty]: Start isEmpty. Operand 60835 states and 68422 transitions. [2021-12-15 09:41:22,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2021-12-15 09:41:22,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:22,175 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:41:22,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:41:22,176 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:22,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:22,177 INFO L85 PathProgramCache]: Analyzing trace with hash -446642940, now seen corresponding path program 1 times [2021-12-15 09:41:22,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:22,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428020137] [2021-12-15 09:41:22,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:22,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 375 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 09:41:22,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:22,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428020137] [2021-12-15 09:41:22,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428020137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:22,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:22,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:41:22,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206944285] [2021-12-15 09:41:22,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:22,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:22,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:22,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:22,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:22,566 INFO L87 Difference]: Start difference. First operand 60835 states and 68422 transitions. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 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 09:41:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:25,456 INFO L93 Difference]: Finished difference Result 152459 states and 172803 transitions. [2021-12-15 09:41:25,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:25,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 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 09:41:25,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:25,566 INFO L225 Difference]: With dead ends: 152459 [2021-12-15 09:41:25,567 INFO L226 Difference]: Without dead ends: 92377 [2021-12-15 09:41:25,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:25,587 INFO L933 BasicCegarLoop]: 1278 mSDtfsCounter, 521 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2150 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 2857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 2150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:25,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 1285 Invalid, 2857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 2150 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:41:25,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92377 states. [2021-12-15 09:41:26,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92377 to 83365. [2021-12-15 09:41:26,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83365 states, 83364 states have (on average 1.1139940501895302) internal successors, (92867), 83364 states have internal predecessors, (92867), 0 states have call successors, (0), 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 09:41:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83365 states to 83365 states and 92867 transitions. [2021-12-15 09:41:26,711 INFO L78 Accepts]: Start accepts. Automaton has 83365 states and 92867 transitions. Word has length 569 [2021-12-15 09:41:26,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:26,712 INFO L470 AbstractCegarLoop]: Abstraction has 83365 states and 92867 transitions. [2021-12-15 09:41:26,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 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 09:41:26,712 INFO L276 IsEmpty]: Start isEmpty. Operand 83365 states and 92867 transitions. [2021-12-15 09:41:26,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 634 [2021-12-15 09:41:26,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:26,744 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:41:26,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:41:26,745 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:26,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:26,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1064591652, now seen corresponding path program 1 times [2021-12-15 09:41:26,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:26,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566334146] [2021-12-15 09:41:26,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:26,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 643 proven. 303 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-15 09:41:26,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:26,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566334146] [2021-12-15 09:41:26,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566334146] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:41:26,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548597179] [2021-12-15 09:41:26,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:26,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:41:26,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:41:26,980 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:41:26,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:41:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:27,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:41:27,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:41:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 602 proven. 0 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2021-12-15 09:41:28,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:41:28,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548597179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:28,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:41:28,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 09:41:28,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713556813] [2021-12-15 09:41:28,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:28,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:28,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:28,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:28,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:41:28,121 INFO L87 Difference]: Start difference. First operand 83365 states and 92867 transitions. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 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 09:41:30,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:30,892 INFO L93 Difference]: Finished difference Result 167479 states and 186685 transitions. [2021-12-15 09:41:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:30,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 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 633 [2021-12-15 09:41:30,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:30,981 INFO L225 Difference]: With dead ends: 167479 [2021-12-15 09:41:30,981 INFO L226 Difference]: Without dead ends: 84867 [2021-12-15 09:41:30,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 632 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:41:31,001 INFO L933 BasicCegarLoop]: 1109 mSDtfsCounter, 697 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2198 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 2690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 2198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:31,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 1117 Invalid, 2690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 2198 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:41:31,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84867 states.