./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label55.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/Problem17_label55.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 09a7076b11bd93aa446f64e9d2cfea0a1b6b8e99744d45c786a334a0139444f2 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:02:57,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:02:57,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:02:57,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:02:57,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:02:57,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:02:57,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:02:57,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:02:57,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:02:57,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:02:57,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:02:57,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:02:57,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:02:57,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:02:57,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:02:57,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:02:57,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:02:57,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:02:57,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:02:57,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:02:57,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:02:57,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:02:57,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:02:57,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:02:57,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:02:57,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:02:57,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:02:57,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:02:57,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:02:57,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:02:57,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:02:57,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:02:57,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:02:57,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:02:57,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:02:57,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:02:57,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:02:57,880 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:02:57,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:02:57,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:02:57,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:02:57,883 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:02:57,915 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:02:57,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:02:57,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:02:57,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:02:57,917 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:02:57,917 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:02:57,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:02:57,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:02:57,918 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:02:57,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:02:57,919 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:02:57,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:02:57,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:02:57,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:02:57,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:02:57,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:02:57,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:02:57,920 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:02:57,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:02:57,921 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:02:57,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:02:57,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:02:57,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:02:57,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:02:57,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:02:57,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:02:57,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:02:57,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:02:57,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:02:57,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:02:57,924 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:02:57,924 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:02:57,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:02:57,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:02:57,924 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09a7076b11bd93aa446f64e9d2cfea0a1b6b8e99744d45c786a334a0139444f2 [2021-12-15 23:02:58,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:02:58,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:02:58,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:02:58,202 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:02:58,202 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:02:58,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label55.c [2021-12-15 23:02:58,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f480dbd3/b9e51b9a97914cf4a3e4cf32b589966e/FLAG43fbeb403 [2021-12-15 23:02:58,876 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:02:58,876 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label55.c [2021-12-15 23:02:58,910 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f480dbd3/b9e51b9a97914cf4a3e4cf32b589966e/FLAG43fbeb403 [2021-12-15 23:02:59,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f480dbd3/b9e51b9a97914cf4a3e4cf32b589966e [2021-12-15 23:02:59,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:02:59,257 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:02:59,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:02:59,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:02:59,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:02:59,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:02:59" (1/1) ... [2021-12-15 23:02:59,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2366b1d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:59, skipping insertion in model container [2021-12-15 23:02:59,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:02:59" (1/1) ... [2021-12-15 23:02:59,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:02:59,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:02:59,602 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/Problem17_label55.c[1783,1796] [2021-12-15 23:03:00,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:03:00,110 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:03:00,131 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/Problem17_label55.c[1783,1796] [2021-12-15 23:03:00,388 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:03:00,404 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:03:00,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:00 WrapperNode [2021-12-15 23:03:00,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:03:00,406 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:03:00,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:03:00,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:03:00,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:00" (1/1) ... [2021-12-15 23:03:00,462 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:00" (1/1) ... [2021-12-15 23:03:00,768 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-15 23:03:00,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:03:00,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:03:00,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:03:00,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:03:00,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:00" (1/1) ... [2021-12-15 23:03:00,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:00" (1/1) ... [2021-12-15 23:03:00,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:00" (1/1) ... [2021-12-15 23:03:00,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:00" (1/1) ... [2021-12-15 23:03:00,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:00" (1/1) ... [2021-12-15 23:03:01,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:00" (1/1) ... [2021-12-15 23:03:01,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:00" (1/1) ... [2021-12-15 23:03:01,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:03:01,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:03:01,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:03:01,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:03:01,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:00" (1/1) ... [2021-12-15 23:03:01,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:03:01,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:03:01,114 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 23:03:01,128 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 23:03:01,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:03:01,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:03:01,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:03:01,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:03:01,231 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:03:01,232 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:03:03,887 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:03:03,908 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:03:03,909 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 23:03:03,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:03:03 BoogieIcfgContainer [2021-12-15 23:03:03,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:03:03,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:03:03,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:03:03,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:03:03,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:02:59" (1/3) ... [2021-12-15 23:03:03,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53003705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:03:03, skipping insertion in model container [2021-12-15 23:03:03,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:00" (2/3) ... [2021-12-15 23:03:03,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53003705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:03:03, skipping insertion in model container [2021-12-15 23:03:03,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:03:03" (3/3) ... [2021-12-15 23:03:03,921 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label55.c [2021-12-15 23:03:03,929 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:03:03,929 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:03:03,985 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:03:03,991 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 23:03:03,991 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:03:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 23:03:04,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 23:03:04,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:04,031 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:04,032 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:04,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:04,037 INFO L85 PathProgramCache]: Analyzing trace with hash -988188511, now seen corresponding path program 1 times [2021-12-15 23:03:04,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:04,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214127770] [2021-12-15 23:03:04,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:04,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:04,221 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 23:03:04,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:04,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214127770] [2021-12-15 23:03:04,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214127770] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:04,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:04,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:03:04,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549375097] [2021-12-15 23:03:04,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:04,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:04,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:04,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:04,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:04,266 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 23:03:06,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:06,860 INFO L93 Difference]: Finished difference Result 1680 states and 3074 transitions. [2021-12-15 23:03:06,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:06,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-12-15 23:03:06,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:06,887 INFO L225 Difference]: With dead ends: 1680 [2021-12-15 23:03:06,887 INFO L226 Difference]: Without dead ends: 1011 [2021-12-15 23:03:06,893 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 23:03:06,901 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 570 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:06,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 220 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 23:03:06,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-12-15 23:03:06,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 996. [2021-12-15 23:03:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.735678391959799) internal successors, (1727), 995 states have internal predecessors, (1727), 0 states have call successors, (0), 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 23:03:06,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1727 transitions. [2021-12-15 23:03:06,987 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1727 transitions. Word has length 11 [2021-12-15 23:03:06,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:06,988 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 1727 transitions. [2021-12-15 23:03:06,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 23:03:06,989 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1727 transitions. [2021-12-15 23:03:06,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-15 23:03:06,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:06,991 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 23:03:06,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:03:06,992 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:06,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:06,992 INFO L85 PathProgramCache]: Analyzing trace with hash 411453157, now seen corresponding path program 1 times [2021-12-15 23:03:06,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:06,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670390782] [2021-12-15 23:03:06,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:06,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:07,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:07,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670390782] [2021-12-15 23:03:07,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670390782] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:07,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:07,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:03:07,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797431054] [2021-12-15 23:03:07,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:07,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:07,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:07,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:07,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:07,184 INFO L87 Difference]: Start difference. First operand 996 states and 1727 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 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 23:03:09,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:09,010 INFO L93 Difference]: Finished difference Result 2873 states and 5026 transitions. [2021-12-15 23:03:09,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:09,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-15 23:03:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:09,017 INFO L225 Difference]: With dead ends: 2873 [2021-12-15 23:03:09,017 INFO L226 Difference]: Without dead ends: 1879 [2021-12-15 23:03:09,020 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 23:03:09,021 INFO L933 BasicCegarLoop]: 448 mSDtfsCounter, 409 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:09,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 521 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 23:03:09,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2021-12-15 23:03:09,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1870. [2021-12-15 23:03:09,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 1.4724451578384163) internal successors, (2752), 1869 states have internal predecessors, (2752), 0 states have call successors, (0), 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 23:03:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2752 transitions. [2021-12-15 23:03:09,082 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2752 transitions. Word has length 76 [2021-12-15 23:03:09,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:09,083 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2752 transitions. [2021-12-15 23:03:09,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 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 23:03:09,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2752 transitions. [2021-12-15 23:03:09,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-15 23:03:09,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:09,084 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 23:03:09,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 23:03:09,085 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:09,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:09,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1729618924, now seen corresponding path program 1 times [2021-12-15 23:03:09,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:09,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084252177] [2021-12-15 23:03:09,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:09,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:09,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:09,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084252177] [2021-12-15 23:03:09,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084252177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:09,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:09,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:09,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124931553] [2021-12-15 23:03:09,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:09,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:09,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:09,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:09,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:09,230 INFO L87 Difference]: Start difference. First operand 1870 states and 2752 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 23:03:11,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:11,412 INFO L93 Difference]: Finished difference Result 5454 states and 8042 transitions. [2021-12-15 23:03:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:11,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-12-15 23:03:11,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:11,422 INFO L225 Difference]: With dead ends: 5454 [2021-12-15 23:03:11,422 INFO L226 Difference]: Without dead ends: 3586 [2021-12-15 23:03:11,424 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 23:03:11,425 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 483 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:11,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 914 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 23:03:11,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-12-15 23:03:11,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3583. [2021-12-15 23:03:11,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 1.3358458961474038) internal successors, (4785), 3582 states have internal predecessors, (4785), 0 states have call successors, (0), 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 23:03:11,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4785 transitions. [2021-12-15 23:03:11,524 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4785 transitions. Word has length 81 [2021-12-15 23:03:11,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:11,527 INFO L470 AbstractCegarLoop]: Abstraction has 3583 states and 4785 transitions. [2021-12-15 23:03:11,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 23:03:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4785 transitions. [2021-12-15 23:03:11,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-15 23:03:11,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:11,536 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 23:03:11,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 23:03:11,536 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:11,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:11,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1109755807, now seen corresponding path program 1 times [2021-12-15 23:03:11,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:11,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577879919] [2021-12-15 23:03:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:11,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:11,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:11,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577879919] [2021-12-15 23:03:11,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577879919] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:11,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:11,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:11,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472691257] [2021-12-15 23:03:11,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:11,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:03:11,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:11,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:03:11,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:03:11,730 INFO L87 Difference]: Start difference. First operand 3583 states and 4785 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 23:03:13,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:13,450 INFO L93 Difference]: Finished difference Result 7618 states and 10088 transitions. [2021-12-15 23:03:13,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 23:03:13,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-12-15 23:03:13,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:13,463 INFO L225 Difference]: With dead ends: 7618 [2021-12-15 23:03:13,463 INFO L226 Difference]: Without dead ends: 4037 [2021-12-15 23:03:13,468 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 23:03:13,469 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 746 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:13,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 935 Invalid, 1875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 23:03:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4037 states. [2021-12-15 23:03:13,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4037 to 4008. [2021-12-15 23:03:13,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4008 states, 4007 states have (on average 1.3017219865235836) internal successors, (5216), 4007 states have internal predecessors, (5216), 0 states have call successors, (0), 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 23:03:13,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4008 states to 4008 states and 5216 transitions. [2021-12-15 23:03:13,528 INFO L78 Accepts]: Start accepts. Automaton has 4008 states and 5216 transitions. Word has length 122 [2021-12-15 23:03:13,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:13,529 INFO L470 AbstractCegarLoop]: Abstraction has 4008 states and 5216 transitions. [2021-12-15 23:03:13,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 23:03:13,530 INFO L276 IsEmpty]: Start isEmpty. Operand 4008 states and 5216 transitions. [2021-12-15 23:03:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-15 23:03:13,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:13,531 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:13,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 23:03:13,531 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:13,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2122232860, now seen corresponding path program 1 times [2021-12-15 23:03:13,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:13,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844605042] [2021-12-15 23:03:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:13,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-15 23:03:13,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:13,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844605042] [2021-12-15 23:03:13,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844605042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:13,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:13,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:03:13,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366640873] [2021-12-15 23:03:13,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:13,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:13,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:13,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:13,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:13,681 INFO L87 Difference]: Start difference. First operand 4008 states and 5216 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 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 23:03:15,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:15,296 INFO L93 Difference]: Finished difference Result 10996 states and 14542 transitions. [2021-12-15 23:03:15,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:15,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 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 150 [2021-12-15 23:03:15,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:15,312 INFO L225 Difference]: With dead ends: 10996 [2021-12-15 23:03:15,312 INFO L226 Difference]: Without dead ends: 5711 [2021-12-15 23:03:15,319 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 23:03:15,320 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:15,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:03:15,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-12-15 23:03:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 4431. [2021-12-15 23:03:15,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4431 states, 4430 states have (on average 1.209255079006772) internal successors, (5357), 4430 states have internal predecessors, (5357), 0 states have call successors, (0), 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 23:03:15,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4431 states to 4431 states and 5357 transitions. [2021-12-15 23:03:15,458 INFO L78 Accepts]: Start accepts. Automaton has 4431 states and 5357 transitions. Word has length 150 [2021-12-15 23:03:15,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:15,459 INFO L470 AbstractCegarLoop]: Abstraction has 4431 states and 5357 transitions. [2021-12-15 23:03:15,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 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 23:03:15,459 INFO L276 IsEmpty]: Start isEmpty. Operand 4431 states and 5357 transitions. [2021-12-15 23:03:15,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-15 23:03:15,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:15,463 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:15,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 23:03:15,464 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:15,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:15,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2101613826, now seen corresponding path program 1 times [2021-12-15 23:03:15,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:15,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251562292] [2021-12-15 23:03:15,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:15,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:15,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:15,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251562292] [2021-12-15 23:03:15,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251562292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:15,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:15,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:15,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793204047] [2021-12-15 23:03:15,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:15,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:15,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:15,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:15,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:15,586 INFO L87 Difference]: Start difference. First operand 4431 states and 5357 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:17,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:17,195 INFO L93 Difference]: Finished difference Result 11410 states and 14012 transitions. [2021-12-15 23:03:17,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:17,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-12-15 23:03:17,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:17,219 INFO L225 Difference]: With dead ends: 11410 [2021-12-15 23:03:17,219 INFO L226 Difference]: Without dead ends: 6981 [2021-12-15 23:03:17,226 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 23:03:17,229 INFO L933 BasicCegarLoop]: 727 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:17,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 785 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:03:17,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6981 states. [2021-12-15 23:03:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6981 to 6981. [2021-12-15 23:03:17,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6981 states, 6980 states have (on average 1.1835243553008596) internal successors, (8261), 6980 states have internal predecessors, (8261), 0 states have call successors, (0), 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 23:03:17,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6981 states to 6981 states and 8261 transitions. [2021-12-15 23:03:17,381 INFO L78 Accepts]: Start accepts. Automaton has 6981 states and 8261 transitions. Word has length 163 [2021-12-15 23:03:17,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:17,381 INFO L470 AbstractCegarLoop]: Abstraction has 6981 states and 8261 transitions. [2021-12-15 23:03:17,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:17,382 INFO L276 IsEmpty]: Start isEmpty. Operand 6981 states and 8261 transitions. [2021-12-15 23:03:17,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-15 23:03:17,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:17,386 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:17,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 23:03:17,386 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:17,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:17,388 INFO L85 PathProgramCache]: Analyzing trace with hash 987565281, now seen corresponding path program 1 times [2021-12-15 23:03:17,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:17,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179535779] [2021-12-15 23:03:17,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:17,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-15 23:03:17,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:17,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179535779] [2021-12-15 23:03:17,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179535779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:17,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:17,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:17,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417877851] [2021-12-15 23:03:17,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:17,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:17,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:17,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:17,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:17,545 INFO L87 Difference]: Start difference. First operand 6981 states and 8261 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 23:03:19,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:19,150 INFO L93 Difference]: Finished difference Result 17786 states and 21271 transitions. [2021-12-15 23:03:19,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:19,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 243 [2021-12-15 23:03:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:19,184 INFO L225 Difference]: With dead ends: 17786 [2021-12-15 23:03:19,185 INFO L226 Difference]: Without dead ends: 9957 [2021-12-15 23:03:19,191 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 23:03:19,192 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 384 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:19,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 858 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:03:19,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9957 states. [2021-12-15 23:03:19,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9957 to 9957. [2021-12-15 23:03:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9957 states, 9956 states have (on average 1.1449377259943752) internal successors, (11399), 9956 states have internal predecessors, (11399), 0 states have call successors, (0), 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 23:03:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9957 states to 9957 states and 11399 transitions. [2021-12-15 23:03:19,347 INFO L78 Accepts]: Start accepts. Automaton has 9957 states and 11399 transitions. Word has length 243 [2021-12-15 23:03:19,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:19,347 INFO L470 AbstractCegarLoop]: Abstraction has 9957 states and 11399 transitions. [2021-12-15 23:03:19,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 23:03:19,348 INFO L276 IsEmpty]: Start isEmpty. Operand 9957 states and 11399 transitions. [2021-12-15 23:03:19,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-12-15 23:03:19,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:19,351 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:19,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 23:03:19,351 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:19,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:19,353 INFO L85 PathProgramCache]: Analyzing trace with hash 585499196, now seen corresponding path program 1 times [2021-12-15 23:03:19,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:19,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410900997] [2021-12-15 23:03:19,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:19,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-15 23:03:19,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:19,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410900997] [2021-12-15 23:03:19,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410900997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:19,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:19,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:19,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063579765] [2021-12-15 23:03:19,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:19,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:19,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:19,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:19,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:19,452 INFO L87 Difference]: Start difference. First operand 9957 states and 11399 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 23:03:21,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:21,013 INFO L93 Difference]: Finished difference Result 23316 states and 26854 transitions. [2021-12-15 23:03:21,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:21,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 283 [2021-12-15 23:03:21,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:21,035 INFO L225 Difference]: With dead ends: 23316 [2021-12-15 23:03:21,035 INFO L226 Difference]: Without dead ends: 12487 [2021-12-15 23:03:21,047 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 23:03:21,048 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 517 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:21,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 680 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:03:21,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12487 states. [2021-12-15 23:03:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12487 to 12485. [2021-12-15 23:03:21,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12485 states, 12484 states have (on average 1.1342518423582184) internal successors, (14160), 12484 states have internal predecessors, (14160), 0 states have call successors, (0), 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 23:03:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12485 states to 12485 states and 14160 transitions. [2021-12-15 23:03:21,242 INFO L78 Accepts]: Start accepts. Automaton has 12485 states and 14160 transitions. Word has length 283 [2021-12-15 23:03:21,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:21,243 INFO L470 AbstractCegarLoop]: Abstraction has 12485 states and 14160 transitions. [2021-12-15 23:03:21,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 23:03:21,243 INFO L276 IsEmpty]: Start isEmpty. Operand 12485 states and 14160 transitions. [2021-12-15 23:03:21,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-12-15 23:03:21,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:21,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:21,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 23:03:21,254 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:21,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:21,254 INFO L85 PathProgramCache]: Analyzing trace with hash 203671020, now seen corresponding path program 1 times [2021-12-15 23:03:21,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:21,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496498889] [2021-12-15 23:03:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:21,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:21,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:21,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496498889] [2021-12-15 23:03:21,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496498889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:21,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:21,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:21,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127556531] [2021-12-15 23:03:21,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:21,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:03:21,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:21,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:03:21,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:03:21,364 INFO L87 Difference]: Start difference. First operand 12485 states and 14160 transitions. Second operand has 4 states, 4 states have (on average 87.5) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 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 23:03:23,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:23,489 INFO L93 Difference]: Finished difference Result 28835 states and 32796 transitions. [2021-12-15 23:03:23,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:03:23,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 87.5) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 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 350 [2021-12-15 23:03:23,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:23,516 INFO L225 Difference]: With dead ends: 28835 [2021-12-15 23:03:23,516 INFO L226 Difference]: Without dead ends: 15927 [2021-12-15 23:03:23,527 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 23:03:23,529 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 646 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 2652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:23,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 219 Invalid, 2652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 23:03:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15927 states. [2021-12-15 23:03:23,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15927 to 15922. [2021-12-15 23:03:23,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15922 states, 15921 states have (on average 1.1432070849820992) internal successors, (18201), 15921 states have internal predecessors, (18201), 0 states have call successors, (0), 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 23:03:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15922 states to 15922 states and 18201 transitions. [2021-12-15 23:03:23,788 INFO L78 Accepts]: Start accepts. Automaton has 15922 states and 18201 transitions. Word has length 350 [2021-12-15 23:03:23,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:23,788 INFO L470 AbstractCegarLoop]: Abstraction has 15922 states and 18201 transitions. [2021-12-15 23:03:23,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.5) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 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 23:03:23,789 INFO L276 IsEmpty]: Start isEmpty. Operand 15922 states and 18201 transitions. [2021-12-15 23:03:23,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-12-15 23:03:23,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:23,795 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:23,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 23:03:23,796 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:23,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:23,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1288175596, now seen corresponding path program 1 times [2021-12-15 23:03:23,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:23,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521143263] [2021-12-15 23:03:23,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:23,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 17 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:23,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:23,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521143263] [2021-12-15 23:03:23,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521143263] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:03:23,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70282696] [2021-12-15 23:03:23,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:23,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:03:23,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:03:23,942 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 23:03:23,975 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 23:03:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:24,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 23:03:24,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:03:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 17 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:24,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:03:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:25,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70282696] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 23:03:25,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:03:25,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-15 23:03:25,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614713113] [2021-12-15 23:03:25,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:25,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:03:25,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:25,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:03:25,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:03:25,651 INFO L87 Difference]: Start difference. First operand 15922 states and 18201 transitions. Second operand has 4 states, 4 states have (on average 94.5) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 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 23:03:28,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:28,170 INFO L93 Difference]: Finished difference Result 37372 states and 42569 transitions. [2021-12-15 23:03:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:03:28,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 94.5) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 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 378 [2021-12-15 23:03:28,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:28,199 INFO L225 Difference]: With dead ends: 37372 [2021-12-15 23:03:28,199 INFO L226 Difference]: Without dead ends: 20175 [2021-12-15 23:03:28,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 757 GetRequests, 751 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:03:28,215 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 755 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 2138 mSolverCounterSat, 766 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 766 IncrementalHoareTripleChecker+Valid, 2138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:28,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 144 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [766 Valid, 2138 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 23:03:28,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20175 states. [2021-12-15 23:03:28,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20175 to 16345. [2021-12-15 23:03:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16345 states, 16344 states have (on average 1.139623103279491) internal successors, (18626), 16344 states have internal predecessors, (18626), 0 states have call successors, (0), 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 23:03:28,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16345 states to 16345 states and 18626 transitions. [2021-12-15 23:03:28,374 INFO L78 Accepts]: Start accepts. Automaton has 16345 states and 18626 transitions. Word has length 378 [2021-12-15 23:03:28,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:28,374 INFO L470 AbstractCegarLoop]: Abstraction has 16345 states and 18626 transitions. [2021-12-15 23:03:28,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.5) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 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 23:03:28,374 INFO L276 IsEmpty]: Start isEmpty. Operand 16345 states and 18626 transitions. [2021-12-15 23:03:28,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2021-12-15 23:03:28,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:28,384 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 23:03:28,405 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 23:03:28,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-15 23:03:28,606 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:28,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:28,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1274385449, now seen corresponding path program 1 times [2021-12-15 23:03:28,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:28,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571227663] [2021-12-15 23:03:28,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:28,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 26 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:28,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:28,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571227663] [2021-12-15 23:03:28,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571227663] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:03:28,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786136413] [2021-12-15 23:03:28,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:28,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:03:28,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:03:28,777 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 23:03:28,808 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 23:03:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:28,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 23:03:28,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:03:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 173 proven. 73 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 23:03:29,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:03:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 23:03:30,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786136413] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 23:03:30,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:03:30,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2021-12-15 23:03:30,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563209339] [2021-12-15 23:03:30,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:30,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:03:30,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:30,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:03:30,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 23:03:30,316 INFO L87 Difference]: Start difference. First operand 16345 states and 18626 transitions. Second operand has 4 states, 4 states have (on average 111.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 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 23:03:32,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:32,875 INFO L93 Difference]: Finished difference Result 41666 states and 47602 transitions. [2021-12-15 23:03:32,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:03:32,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 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 452 [2021-12-15 23:03:32,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:32,910 INFO L225 Difference]: With dead ends: 41666 [2021-12-15 23:03:32,910 INFO L226 Difference]: Without dead ends: 25748 [2021-12-15 23:03:32,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 899 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 23:03:32,920 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 840 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 2268 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 2721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 2268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:32,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 183 Invalid, 2721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 2268 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 23:03:32,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25748 states. [2021-12-15 23:03:33,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25748 to 24041. [2021-12-15 23:03:33,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24041 states, 24040 states have (on average 1.143053244592346) internal successors, (27479), 24040 states have internal predecessors, (27479), 0 states have call successors, (0), 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 23:03:33,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24041 states to 24041 states and 27479 transitions. [2021-12-15 23:03:33,155 INFO L78 Accepts]: Start accepts. Automaton has 24041 states and 27479 transitions. Word has length 452 [2021-12-15 23:03:33,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:33,156 INFO L470 AbstractCegarLoop]: Abstraction has 24041 states and 27479 transitions. [2021-12-15 23:03:33,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 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 23:03:33,157 INFO L276 IsEmpty]: Start isEmpty. Operand 24041 states and 27479 transitions. [2021-12-15 23:03:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2021-12-15 23:03:33,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:33,174 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:33,192 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 23:03:33,391 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,SelfDestructingSolverStorable10 [2021-12-15 23:03:33,391 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:33,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:33,392 INFO L85 PathProgramCache]: Analyzing trace with hash 2081259352, now seen corresponding path program 1 times [2021-12-15 23:03:33,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:33,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122106671] [2021-12-15 23:03:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:33,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-12-15 23:03:33,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:33,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122106671] [2021-12-15 23:03:33,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122106671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:33,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:33,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:33,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588422336] [2021-12-15 23:03:33,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:33,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:33,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:33,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:33,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:33,507 INFO L87 Difference]: Start difference. First operand 24041 states and 27479 transitions. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 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 23:03:35,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:35,084 INFO L93 Difference]: Finished difference Result 56587 states and 64742 transitions. [2021-12-15 23:03:35,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:35,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 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 508 [2021-12-15 23:03:35,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:35,118 INFO L225 Difference]: With dead ends: 56587 [2021-12-15 23:03:35,118 INFO L226 Difference]: Without dead ends: 30413 [2021-12-15 23:03:35,133 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 23:03:35,134 INFO L933 BasicCegarLoop]: 669 mSDtfsCounter, 492 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:35,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 717 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:03:35,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30413 states. [2021-12-15 23:03:35,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30413 to 30407. [2021-12-15 23:03:35,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30407 states, 30406 states have (on average 1.1227718213510491) internal successors, (34139), 30406 states have internal predecessors, (34139), 0 states have call successors, (0), 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 23:03:35,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30407 states to 30407 states and 34139 transitions. [2021-12-15 23:03:35,442 INFO L78 Accepts]: Start accepts. Automaton has 30407 states and 34139 transitions. Word has length 508 [2021-12-15 23:03:35,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:35,443 INFO L470 AbstractCegarLoop]: Abstraction has 30407 states and 34139 transitions. [2021-12-15 23:03:35,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 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 23:03:35,443 INFO L276 IsEmpty]: Start isEmpty. Operand 30407 states and 34139 transitions. [2021-12-15 23:03:35,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2021-12-15 23:03:35,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:35,455 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:35,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 23:03:35,456 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:35,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:35,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1568111349, now seen corresponding path program 1 times [2021-12-15 23:03:35,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:35,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819580215] [2021-12-15 23:03:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:35,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 452 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-15 23:03:35,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:35,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819580215] [2021-12-15 23:03:35,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819580215] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:35,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:35,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:35,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102421650] [2021-12-15 23:03:35,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:35,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:35,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:35,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:35,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:35,647 INFO L87 Difference]: Start difference. First operand 30407 states and 34139 transitions. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 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 23:03:37,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:37,334 INFO L93 Difference]: Finished difference Result 70621 states and 79586 transitions. [2021-12-15 23:03:37,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:37,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 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 558 [2021-12-15 23:03:37,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:37,376 INFO L225 Difference]: With dead ends: 70621 [2021-12-15 23:03:37,377 INFO L226 Difference]: Without dead ends: 39364 [2021-12-15 23:03:37,399 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 23:03:37,401 INFO L933 BasicCegarLoop]: 601 mSDtfsCounter, 428 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:37,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 640 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:03:37,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39364 states. [2021-12-15 23:03:37,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39364 to 37232. [2021-12-15 23:03:37,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37232 states, 37231 states have (on average 1.1269909484032123) internal successors, (41959), 37231 states have internal predecessors, (41959), 0 states have call successors, (0), 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 23:03:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37232 states to 37232 states and 41959 transitions. [2021-12-15 23:03:37,899 INFO L78 Accepts]: Start accepts. Automaton has 37232 states and 41959 transitions. Word has length 558 [2021-12-15 23:03:37,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:37,900 INFO L470 AbstractCegarLoop]: Abstraction has 37232 states and 41959 transitions. [2021-12-15 23:03:37,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 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 23:03:37,900 INFO L276 IsEmpty]: Start isEmpty. Operand 37232 states and 41959 transitions. [2021-12-15 23:03:37,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2021-12-15 23:03:37,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:37,912 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:37,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 23:03:37,913 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:37,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:37,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2028998492, now seen corresponding path program 1 times [2021-12-15 23:03:37,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:37,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791655550] [2021-12-15 23:03:37,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:37,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 531 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 23:03:38,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:38,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791655550] [2021-12-15 23:03:38,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791655550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:38,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:38,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:03:38,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147166916] [2021-12-15 23:03:38,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:38,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:03:38,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:38,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:03:38,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:03:38,041 INFO L87 Difference]: Start difference. First operand 37232 states and 41959 transitions. Second operand has 4 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 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 23:03:40,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:40,747 INFO L93 Difference]: Finished difference Result 100916 states and 113790 transitions. [2021-12-15 23:03:40,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:03:40,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 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 562 [2021-12-15 23:03:40,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:40,831 INFO L225 Difference]: With dead ends: 100916 [2021-12-15 23:03:40,831 INFO L226 Difference]: Without dead ends: 64111 [2021-12-15 23:03:40,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 23:03:40,855 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 819 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 2712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:40,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [819 Valid, 186 Invalid, 2712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 23:03:40,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64111 states. [2021-12-15 23:03:41,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64111 to 61552. [2021-12-15 23:03:41,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61552 states, 61551 states have (on average 1.1249207973875324) internal successors, (69240), 61551 states have internal predecessors, (69240), 0 states have call successors, (0), 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 23:03:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61552 states to 61552 states and 69240 transitions. [2021-12-15 23:03:41,708 INFO L78 Accepts]: Start accepts. Automaton has 61552 states and 69240 transitions. Word has length 562 [2021-12-15 23:03:41,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:41,708 INFO L470 AbstractCegarLoop]: Abstraction has 61552 states and 69240 transitions. [2021-12-15 23:03:41,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 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 23:03:41,709 INFO L276 IsEmpty]: Start isEmpty. Operand 61552 states and 69240 transitions. [2021-12-15 23:03:41,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2021-12-15 23:03:41,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:41,726 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:41,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 23:03:41,726 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:41,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:41,727 INFO L85 PathProgramCache]: Analyzing trace with hash 957459080, now seen corresponding path program 1 times [2021-12-15 23:03:41,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:41,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200374339] [2021-12-15 23:03:41,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:41,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 371 proven. 82 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-15 23:03:42,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:42,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200374339] [2021-12-15 23:03:42,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200374339] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:03:42,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950096396] [2021-12-15 23:03:42,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:42,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:03:42,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:03:42,116 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 23:03:42,117 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 23:03:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:42,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 23:03:42,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:03:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 371 proven. 82 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-15 23:03:43,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:03:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 452 proven. 1 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-15 23:03:45,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950096396] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 23:03:45,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 23:03:45,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-15 23:03:45,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672970742] [2021-12-15 23:03:45,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 23:03:45,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 23:03:45,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:45,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 23:03:45,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-15 23:03:45,225 INFO L87 Difference]: Start difference. First operand 61552 states and 69240 transitions. Second operand has 9 states, 9 states have (on average 92.0) internal successors, (828), 8 states have internal predecessors, (828), 0 states have call successors, (0), 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 23:03:50,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:50,219 INFO L93 Difference]: Finished difference Result 141421 states and 158946 transitions. [2021-12-15 23:03:50,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 23:03:50,220 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 92.0) internal successors, (828), 8 states have internal predecessors, (828), 0 states have call successors, (0), 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 577 [2021-12-15 23:03:50,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:50,310 INFO L225 Difference]: With dead ends: 141421 [2021-12-15 23:03:50,311 INFO L226 Difference]: Without dead ends: 80296 [2021-12-15 23:03:50,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1162 GetRequests, 1149 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-12-15 23:03:50,347 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 3511 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 5119 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3511 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 6039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 5119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:50,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3511 Valid, 332 Invalid, 6039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 5119 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 23:03:50,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80296 states. [2021-12-15 23:03:51,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80296 to 67916. [2021-12-15 23:03:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67916 states, 67915 states have (on average 1.117941544577781) internal successors, (75925), 67915 states have internal predecessors, (75925), 0 states have call successors, (0), 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 23:03:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67916 states to 67916 states and 75925 transitions. [2021-12-15 23:03:51,429 INFO L78 Accepts]: Start accepts. Automaton has 67916 states and 75925 transitions. Word has length 577 [2021-12-15 23:03:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:51,429 INFO L470 AbstractCegarLoop]: Abstraction has 67916 states and 75925 transitions. [2021-12-15 23:03:51,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 92.0) internal successors, (828), 8 states have internal predecessors, (828), 0 states have call successors, (0), 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 23:03:51,430 INFO L276 IsEmpty]: Start isEmpty. Operand 67916 states and 75925 transitions. [2021-12-15 23:03:51,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 638 [2021-12-15 23:03:51,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:51,446 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 3, 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] [2021-12-15 23:03:51,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 23:03:51,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:03:51,663 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:51,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:51,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1438705959, now seen corresponding path program 1 times [2021-12-15 23:03:51,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:51,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973060305] [2021-12-15 23:03:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:51,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 597 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-12-15 23:03:52,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:52,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973060305] [2021-12-15 23:03:52,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973060305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:52,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:52,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:52,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815916865] [2021-12-15 23:03:52,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:52,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:52,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:52,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:52,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:52,057 INFO L87 Difference]: Start difference. First operand 67916 states and 75925 transitions. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 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 23:03:53,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:53,981 INFO L93 Difference]: Finished difference Result 156688 states and 175648 transitions. [2021-12-15 23:03:53,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:53,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 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 637 [2021-12-15 23:03:53,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:54,082 INFO L225 Difference]: With dead ends: 156688 [2021-12-15 23:03:54,082 INFO L226 Difference]: Without dead ends: 89197 [2021-12-15 23:03:54,115 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 23:03:54,116 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 426 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:54,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 338 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:03:54,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89197 states. [2021-12-15 23:03:55,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89197 to 86200. [2021-12-15 23:03:55,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86200 states, 86199 states have (on average 1.1056276754950753) internal successors, (95304), 86199 states have internal predecessors, (95304), 0 states have call successors, (0), 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 23:03:55,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86200 states to 86200 states and 95304 transitions. [2021-12-15 23:03:55,228 INFO L78 Accepts]: Start accepts. Automaton has 86200 states and 95304 transitions. Word has length 637 [2021-12-15 23:03:55,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:55,229 INFO L470 AbstractCegarLoop]: Abstraction has 86200 states and 95304 transitions. [2021-12-15 23:03:55,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 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 23:03:55,229 INFO L276 IsEmpty]: Start isEmpty. Operand 86200 states and 95304 transitions. [2021-12-15 23:03:55,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 660 [2021-12-15 23:03:55,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:55,248 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:55,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 23:03:55,249 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:55,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:55,249 INFO L85 PathProgramCache]: Analyzing trace with hash 507069200, now seen corresponding path program 1 times [2021-12-15 23:03:55,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:55,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018940400] [2021-12-15 23:03:55,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:55,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 700 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-15 23:03:55,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:55,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018940400] [2021-12-15 23:03:55,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018940400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:55,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:55,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:55,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837215862] [2021-12-15 23:03:55,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:55,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:55,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:55,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:55,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:55,621 INFO L87 Difference]: Start difference. First operand 86200 states and 95304 transitions. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 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 23:03:57,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:57,551 INFO L93 Difference]: Finished difference Result 184325 states and 203672 transitions. [2021-12-15 23:03:57,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:57,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 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 659 [2021-12-15 23:03:57,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:57,886 INFO L225 Difference]: With dead ends: 184325 [2021-12-15 23:03:57,886 INFO L226 Difference]: Without dead ends: 98552 [2021-12-15 23:03:57,937 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 23:03:57,950 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 329 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:57,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 752 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:03:58,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98552 states. [2021-12-15 23:03:59,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98552 to 95560. [2021-12-15 23:03:59,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95560 states, 95559 states have (on average 1.0980336755303006) internal successors, (104927), 95559 states have internal predecessors, (104927), 0 states have call successors, (0), 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 23:03:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95560 states to 95560 states and 104927 transitions. [2021-12-15 23:03:59,352 INFO L78 Accepts]: Start accepts. Automaton has 95560 states and 104927 transitions. Word has length 659 [2021-12-15 23:03:59,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:59,352 INFO L470 AbstractCegarLoop]: Abstraction has 95560 states and 104927 transitions. [2021-12-15 23:03:59,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 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 23:03:59,353 INFO L276 IsEmpty]: Start isEmpty. Operand 95560 states and 104927 transitions. [2021-12-15 23:03:59,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 710 [2021-12-15 23:03:59,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:59,370 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:59,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 23:03:59,371 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:59,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:59,371 INFO L85 PathProgramCache]: Analyzing trace with hash -987745193, now seen corresponding path program 1 times [2021-12-15 23:03:59,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:59,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584400677] [2021-12-15 23:03:59,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:59,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 758 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-15 23:03:59,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:59,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584400677] [2021-12-15 23:03:59,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584400677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:59,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:59,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:59,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538163883] [2021-12-15 23:03:59,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:59,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:59,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:59,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:59,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:59,518 INFO L87 Difference]: Start difference. First operand 95560 states and 104927 transitions. Second operand has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)