./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label17.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/Problem12_label17.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 d5ce10b415c8706a9c163992802d3ffc66c067ac6ef9711912e3377baf22b40a --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:40:46,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:40:46,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:40:46,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:40:46,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:40:46,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:40:46,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:40:46,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:40:46,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:40:46,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:40:46,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:40:46,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:40:46,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:40:46,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:40:46,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:40:46,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:40:46,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:40:46,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:40:46,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:40:46,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:40:46,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:40:46,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:40:46,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:40:46,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:40:46,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:40:46,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:40:46,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:40:46,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:40:46,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:40:46,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:40:46,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:40:46,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:40:46,799 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:40:46,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:40:46,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:40:46,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:40:46,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:40:46,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:40:46,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:40:46,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:40:46,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:40:46,805 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:40:46,820 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:40:46,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:40:46,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:40:46,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:40:46,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:40:46,822 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:40:46,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:40:46,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:40:46,823 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:40:46,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:40:46,824 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:40:46,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:40:46,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:40:46,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:40:46,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:40:46,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:40:46,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:40:46,825 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:40:46,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:40:46,825 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:40:46,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:40:46,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:40:46,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:40:46,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:40:46,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:40:46,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:40:46,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:40:46,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:40:46,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:40:46,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:40:46,827 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:40:46,827 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:40:46,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:40:46,828 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:40:46,828 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5ce10b415c8706a9c163992802d3ffc66c067ac6ef9711912e3377baf22b40a [2021-12-15 22:40:47,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:40:47,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:40:47,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:40:47,067 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:40:47,067 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:40:47,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label17.c [2021-12-15 22:40:47,154 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c9cdaee9/d92f336173b341cc8e9602e66a4acd5d/FLAG5b3180c41 [2021-12-15 22:40:47,698 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:40:47,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label17.c [2021-12-15 22:40:47,726 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c9cdaee9/d92f336173b341cc8e9602e66a4acd5d/FLAG5b3180c41 [2021-12-15 22:40:47,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c9cdaee9/d92f336173b341cc8e9602e66a4acd5d [2021-12-15 22:40:47,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:40:47,892 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:40:47,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:40:47,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:40:47,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:40:47,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:40:47" (1/1) ... [2021-12-15 22:40:47,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@475b592e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:40:47, skipping insertion in model container [2021-12-15 22:40:47,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:40:47" (1/1) ... [2021-12-15 22:40:47,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:40:48,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:40:48,259 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label17.c[5134,5147] [2021-12-15 22:40:48,907 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:40:48,913 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:40:48,934 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label17.c[5134,5147] [2021-12-15 22:40:49,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:40:49,313 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:40:49,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:40:49 WrapperNode [2021-12-15 22:40:49,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:40:49,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:40:49,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:40:49,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:40:49,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:40:49" (1/1) ... [2021-12-15 22:40:49,359 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:40:49" (1/1) ... [2021-12-15 22:40:49,592 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-15 22:40:49,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:40:49,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:40:49,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:40:49,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:40:49,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:40:49" (1/1) ... [2021-12-15 22:40:49,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:40:49" (1/1) ... [2021-12-15 22:40:49,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:40:49" (1/1) ... [2021-12-15 22:40:49,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:40:49" (1/1) ... [2021-12-15 22:40:49,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:40:49" (1/1) ... [2021-12-15 22:40:49,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:40:49" (1/1) ... [2021-12-15 22:40:49,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:40:49" (1/1) ... [2021-12-15 22:40:49,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:40:49,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:40:49,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:40:49,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:40:49,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:40:49" (1/1) ... [2021-12-15 22:40:49,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:40:50,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:40:50,056 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 22:40:50,084 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 22:40:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:40:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:40:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:40:50,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:40:50,183 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:40:50,184 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:40:52,936 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:40:52,952 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:40:52,952 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:40:52,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:40:52 BoogieIcfgContainer [2021-12-15 22:40:52,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:40:52,957 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:40:52,957 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:40:52,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:40:52,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:40:47" (1/3) ... [2021-12-15 22:40:52,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57116e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:40:52, skipping insertion in model container [2021-12-15 22:40:52,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:40:49" (2/3) ... [2021-12-15 22:40:52,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57116e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:40:52, skipping insertion in model container [2021-12-15 22:40:52,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:40:52" (3/3) ... [2021-12-15 22:40:52,962 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label17.c [2021-12-15 22:40:52,965 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:40:52,966 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:40:53,009 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:40:53,015 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 22:40:53,016 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:40:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:40:53,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 22:40:53,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:40:53,082 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:40:53,082 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:40:53,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:40:53,087 INFO L85 PathProgramCache]: Analyzing trace with hash 2102454322, now seen corresponding path program 1 times [2021-12-15 22:40:53,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:40:53,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679761119] [2021-12-15 22:40:53,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:40:53,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:40:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:40:53,274 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 22:40:53,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:40:53,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679761119] [2021-12-15 22:40:53,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679761119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:40:53,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:40:53,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:40:53,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585737687] [2021-12-15 22:40:53,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:40:53,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:40:53,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:40:53,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:40:53,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:40:53,299 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 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 22:40:56,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:40:56,234 INFO L93 Difference]: Finished difference Result 2404 states and 4645 transitions. [2021-12-15 22:40:56,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:40:56,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-12-15 22:40:56,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:40:56,257 INFO L225 Difference]: With dead ends: 2404 [2021-12-15 22:40:56,257 INFO L226 Difference]: Without dead ends: 1506 [2021-12-15 22:40:56,264 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 22:40:56,268 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 780 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:40:56,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 525 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 22:40:56,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-12-15 22:40:56,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-12-15 22:40:56,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6066445182724252) internal successors, (2418), 1505 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:40:56,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2418 transitions. [2021-12-15 22:40:56,348 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2418 transitions. Word has length 40 [2021-12-15 22:40:56,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:40:56,348 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2418 transitions. [2021-12-15 22:40:56,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 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 22:40:56,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2418 transitions. [2021-12-15 22:40:56,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-15 22:40:56,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:40:56,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:40:56,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:40:56,352 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:40:56,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:40:56,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1649978377, now seen corresponding path program 1 times [2021-12-15 22:40:56,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:40:56,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140250533] [2021-12-15 22:40:56,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:40:56,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:40:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:40:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:40:56,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:40:56,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140250533] [2021-12-15 22:40:56,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140250533] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:40:56,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:40:56,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:40:56,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594271193] [2021-12-15 22:40:56,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:40:56,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:40:56,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:40:56,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:40:56,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:40:56,479 INFO L87 Difference]: Start difference. First operand 1506 states and 2418 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 22:40:59,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:40:59,653 INFO L93 Difference]: Finished difference Result 3771 states and 5823 transitions. [2021-12-15 22:40:59,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 22:40:59,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2021-12-15 22:40:59,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:40:59,662 INFO L225 Difference]: With dead ends: 3771 [2021-12-15 22:40:59,663 INFO L226 Difference]: Without dead ends: 2267 [2021-12-15 22:40:59,665 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 22:40:59,667 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 1361 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 2911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:40:59,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1361 Valid, 1645 Invalid, 2911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 22:40:59,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-12-15 22:40:59,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2257. [2021-12-15 22:40:59,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.4073581560283688) internal successors, (3175), 2256 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:40:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3175 transitions. [2021-12-15 22:40:59,710 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3175 transitions. Word has length 115 [2021-12-15 22:40:59,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:40:59,711 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3175 transitions. [2021-12-15 22:40:59,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 22:40:59,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3175 transitions. [2021-12-15 22:40:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-15 22:40:59,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:40:59,717 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:40:59,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:40:59,717 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:40:59,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:40:59,718 INFO L85 PathProgramCache]: Analyzing trace with hash 507479762, now seen corresponding path program 1 times [2021-12-15 22:40:59,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:40:59,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346348185] [2021-12-15 22:40:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:40:59,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:40:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:40:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-15 22:40:59,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:40:59,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346348185] [2021-12-15 22:40:59,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346348185] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:40:59,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949628526] [2021-12-15 22:40:59,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:40:59,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:40:59,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:40:59,872 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 22:40:59,897 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 22:40:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:40:59,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:40:59,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:41:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-15 22:41:00,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:41:00,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949628526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:00,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:41:00,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 22:41:00,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011880066] [2021-12-15 22:41:00,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:00,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:00,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:00,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:00,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:41:00,385 INFO L87 Difference]: Start difference. First operand 2257 states and 3175 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 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 22:41:02,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:02,861 INFO L93 Difference]: Finished difference Result 5263 states and 8006 transitions. [2021-12-15 22:41:02,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:41:02,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 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 181 [2021-12-15 22:41:02,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:02,872 INFO L225 Difference]: With dead ends: 5263 [2021-12-15 22:41:02,872 INFO L226 Difference]: Without dead ends: 3759 [2021-12-15 22:41:02,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:41:02,878 INFO L933 BasicCegarLoop]: 504 mSDtfsCounter, 662 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2341 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 2926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 2341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:02,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 511 Invalid, 2926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 2341 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 22:41:02,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2021-12-15 22:41:02,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3759. [2021-12-15 22:41:02,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.3419372006386376) internal successors, (5043), 3758 states have internal predecessors, (5043), 0 states have call successors, (0), 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 22:41:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5043 transitions. [2021-12-15 22:41:02,931 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5043 transitions. Word has length 181 [2021-12-15 22:41:02,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:02,933 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 5043 transitions. [2021-12-15 22:41:02,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 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 22:41:02,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5043 transitions. [2021-12-15 22:41:02,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-15 22:41:02,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:02,938 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:41:02,956 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 22:41:03,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:41:03,154 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:03,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:03,155 INFO L85 PathProgramCache]: Analyzing trace with hash -722127928, now seen corresponding path program 1 times [2021-12-15 22:41:03,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:03,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712080906] [2021-12-15 22:41:03,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:03,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:03,304 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 22:41:03,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:03,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712080906] [2021-12-15 22:41:03,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712080906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:03,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:03,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:03,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040525352] [2021-12-15 22:41:03,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:03,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:41:03,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:03,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:41:03,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:41:03,310 INFO L87 Difference]: Start difference. First operand 3759 states and 5043 transitions. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 22:41:05,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:05,898 INFO L93 Difference]: Finished difference Result 8304 states and 11184 transitions. [2021-12-15 22:41:05,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:41:05,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 186 [2021-12-15 22:41:05,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:05,933 INFO L225 Difference]: With dead ends: 8304 [2021-12-15 22:41:05,933 INFO L226 Difference]: Without dead ends: 5261 [2021-12-15 22:41:05,938 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 22:41:05,942 INFO L933 BasicCegarLoop]: 694 mSDtfsCounter, 704 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3107 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 3379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 3107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:05,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 708 Invalid, 3379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 3107 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 22:41:05,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2021-12-15 22:41:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5261. [2021-12-15 22:41:06,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.2543726235741446) internal successors, (6598), 5260 states have internal predecessors, (6598), 0 states have call successors, (0), 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 22:41:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 6598 transitions. [2021-12-15 22:41:06,050 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 6598 transitions. Word has length 186 [2021-12-15 22:41:06,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:06,050 INFO L470 AbstractCegarLoop]: Abstraction has 5261 states and 6598 transitions. [2021-12-15 22:41:06,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 22:41:06,051 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 6598 transitions. [2021-12-15 22:41:06,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-15 22:41:06,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:06,054 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:41:06,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:41:06,055 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:06,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:06,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1759287711, now seen corresponding path program 1 times [2021-12-15 22:41:06,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:06,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674393888] [2021-12-15 22:41:06,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:06,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 22:41:06,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:06,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674393888] [2021-12-15 22:41:06,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674393888] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:06,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:06,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:06,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370472376] [2021-12-15 22:41:06,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:06,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:41:06,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:06,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:41:06,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:41:06,254 INFO L87 Difference]: Start difference. First operand 5261 states and 6598 transitions. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 22:41:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:09,027 INFO L93 Difference]: Finished difference Result 12849 states and 16723 transitions. [2021-12-15 22:41:09,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:41:09,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 252 [2021-12-15 22:41:09,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:09,060 INFO L225 Difference]: With dead ends: 12849 [2021-12-15 22:41:09,061 INFO L226 Difference]: Without dead ends: 8267 [2021-12-15 22:41:09,088 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 22:41:09,088 INFO L933 BasicCegarLoop]: 491 mSDtfsCounter, 851 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3468 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 4021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 3468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:09,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 506 Invalid, 4021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 3468 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 22:41:09,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8267 states. [2021-12-15 22:41:09,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8267 to 8265. [2021-12-15 22:41:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8265 states, 8264 states have (on average 1.222894482090997) internal successors, (10106), 8264 states have internal predecessors, (10106), 0 states have call successors, (0), 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 22:41:09,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8265 states to 8265 states and 10106 transitions. [2021-12-15 22:41:09,224 INFO L78 Accepts]: Start accepts. Automaton has 8265 states and 10106 transitions. Word has length 252 [2021-12-15 22:41:09,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:09,225 INFO L470 AbstractCegarLoop]: Abstraction has 8265 states and 10106 transitions. [2021-12-15 22:41:09,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 22:41:09,225 INFO L276 IsEmpty]: Start isEmpty. Operand 8265 states and 10106 transitions. [2021-12-15 22:41:09,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-12-15 22:41:09,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:09,227 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:41:09,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:41:09,228 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:09,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:09,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1969746037, now seen corresponding path program 1 times [2021-12-15 22:41:09,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:09,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639486028] [2021-12-15 22:41:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:09,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-15 22:41:09,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:09,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639486028] [2021-12-15 22:41:09,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639486028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:09,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:09,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:41:09,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700152415] [2021-12-15 22:41:09,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:09,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:09,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:09,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:09,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:41:09,309 INFO L87 Difference]: Start difference. First operand 8265 states and 10106 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 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 22:41:11,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:11,476 INFO L93 Difference]: Finished difference Result 23287 states and 28801 transitions. [2021-12-15 22:41:11,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:41:11,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2021-12-15 22:41:11,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:11,517 INFO L225 Difference]: With dead ends: 23287 [2021-12-15 22:41:11,517 INFO L226 Difference]: Without dead ends: 15775 [2021-12-15 22:41:11,522 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 22:41:11,524 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 693 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:11,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 423 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 1967 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 22:41:11,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15775 states. [2021-12-15 22:41:11,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15775 to 14273. [2021-12-15 22:41:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14273 states, 14272 states have (on average 1.165148542600897) internal successors, (16629), 14272 states have internal predecessors, (16629), 0 states have call successors, (0), 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 22:41:11,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 16629 transitions. [2021-12-15 22:41:11,703 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 16629 transitions. Word has length 255 [2021-12-15 22:41:11,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:11,704 INFO L470 AbstractCegarLoop]: Abstraction has 14273 states and 16629 transitions. [2021-12-15 22:41:11,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 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 22:41:11,704 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 16629 transitions. [2021-12-15 22:41:11,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-12-15 22:41:11,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:11,706 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:41:11,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:41:11,707 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:11,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:11,708 INFO L85 PathProgramCache]: Analyzing trace with hash 519049918, now seen corresponding path program 1 times [2021-12-15 22:41:11,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:11,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379359315] [2021-12-15 22:41:11,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:11,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:41:11,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:11,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379359315] [2021-12-15 22:41:11,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379359315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:11,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:11,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:11,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499848947] [2021-12-15 22:41:11,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:11,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:11,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:11,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:11,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:41:11,791 INFO L87 Difference]: Start difference. First operand 14273 states and 16629 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 22:41:14,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:14,691 INFO L93 Difference]: Finished difference Result 41311 states and 48370 transitions. [2021-12-15 22:41:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:41:14,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2021-12-15 22:41:14,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:14,736 INFO L225 Difference]: With dead ends: 41311 [2021-12-15 22:41:14,736 INFO L226 Difference]: Without dead ends: 27791 [2021-12-15 22:41:14,752 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 22:41:14,753 INFO L933 BasicCegarLoop]: 1378 mSDtfsCounter, 667 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2720 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 2720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:14,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 1386 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 2720 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 22:41:14,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27791 states. [2021-12-15 22:41:15,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27791 to 24787. [2021-12-15 22:41:15,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24787 states, 24786 states have (on average 1.158637940773017) internal successors, (28718), 24786 states have internal predecessors, (28718), 0 states have call successors, (0), 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 22:41:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24787 states to 24787 states and 28718 transitions. [2021-12-15 22:41:15,237 INFO L78 Accepts]: Start accepts. Automaton has 24787 states and 28718 transitions. Word has length 266 [2021-12-15 22:41:15,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:15,237 INFO L470 AbstractCegarLoop]: Abstraction has 24787 states and 28718 transitions. [2021-12-15 22:41:15,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 22:41:15,244 INFO L276 IsEmpty]: Start isEmpty. Operand 24787 states and 28718 transitions. [2021-12-15 22:41:15,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-12-15 22:41:15,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:15,246 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:41:15,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:41:15,246 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:15,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:15,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1995957640, now seen corresponding path program 1 times [2021-12-15 22:41:15,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:15,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176157426] [2021-12-15 22:41:15,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:15,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 22:41:15,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:15,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176157426] [2021-12-15 22:41:15,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176157426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:15,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:15,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:15,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805038350] [2021-12-15 22:41:15,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:15,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:15,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:15,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:15,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:41:15,348 INFO L87 Difference]: Start difference. First operand 24787 states and 28718 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 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 22:41:17,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:17,998 INFO L93 Difference]: Finished difference Result 60086 states and 70729 transitions. [2021-12-15 22:41:17,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:41:18,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 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 270 [2021-12-15 22:41:18,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:18,062 INFO L225 Difference]: With dead ends: 60086 [2021-12-15 22:41:18,062 INFO L226 Difference]: Without dead ends: 36052 [2021-12-15 22:41:18,087 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 22:41:18,088 INFO L933 BasicCegarLoop]: 451 mSDtfsCounter, 739 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2236 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 2236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:18,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 458 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [659 Valid, 2236 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 22:41:18,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36052 states. [2021-12-15 22:41:18,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36052 to 35301. [2021-12-15 22:41:18,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35301 states, 35300 states have (on average 1.1579320113314449) internal successors, (40875), 35300 states have internal predecessors, (40875), 0 states have call successors, (0), 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 22:41:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35301 states to 35301 states and 40875 transitions. [2021-12-15 22:41:18,499 INFO L78 Accepts]: Start accepts. Automaton has 35301 states and 40875 transitions. Word has length 270 [2021-12-15 22:41:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:18,499 INFO L470 AbstractCegarLoop]: Abstraction has 35301 states and 40875 transitions. [2021-12-15 22:41:18,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 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 22:41:18,501 INFO L276 IsEmpty]: Start isEmpty. Operand 35301 states and 40875 transitions. [2021-12-15 22:41:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-12-15 22:41:18,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:18,506 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:41:18,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:41:18,507 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:18,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:18,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1883852602, now seen corresponding path program 1 times [2021-12-15 22:41:18,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:18,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050400061] [2021-12-15 22:41:18,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:18,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-15 22:41:18,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:18,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050400061] [2021-12-15 22:41:18,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050400061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:18,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:18,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:18,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515106451] [2021-12-15 22:41:18,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:18,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:18,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:18,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:18,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:41:18,592 INFO L87 Difference]: Start difference. First operand 35301 states and 40875 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 22:41:21,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:21,006 INFO L93 Difference]: Finished difference Result 87873 states and 102808 transitions. [2021-12-15 22:41:21,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:41:21,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 317 [2021-12-15 22:41:21,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:21,071 INFO L225 Difference]: With dead ends: 87873 [2021-12-15 22:41:21,071 INFO L226 Difference]: Without dead ends: 53325 [2021-12-15 22:41:21,088 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 22:41:21,089 INFO L933 BasicCegarLoop]: 1313 mSDtfsCounter, 742 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 685 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 2840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 685 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:21,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 1321 Invalid, 2840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [685 Valid, 2155 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 22:41:21,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53325 states. [2021-12-15 22:41:21,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53325 to 51072. [2021-12-15 22:41:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51072 states, 51071 states have (on average 1.1374556989289422) internal successors, (58091), 51071 states have internal predecessors, (58091), 0 states have call successors, (0), 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 22:41:21,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51072 states to 51072 states and 58091 transitions. [2021-12-15 22:41:21,602 INFO L78 Accepts]: Start accepts. Automaton has 51072 states and 58091 transitions. Word has length 317 [2021-12-15 22:41:21,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:21,603 INFO L470 AbstractCegarLoop]: Abstraction has 51072 states and 58091 transitions. [2021-12-15 22:41:21,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 22:41:21,603 INFO L276 IsEmpty]: Start isEmpty. Operand 51072 states and 58091 transitions. [2021-12-15 22:41:21,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-12-15 22:41:21,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:21,608 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:41:21,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:41:21,609 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:21,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:21,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1452005440, now seen corresponding path program 1 times [2021-12-15 22:41:21,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:21,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241705655] [2021-12-15 22:41:21,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:21,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-15 22:41:21,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:21,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241705655] [2021-12-15 22:41:21,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241705655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:21,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:21,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:21,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734856884] [2021-12-15 22:41:21,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:21,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:21,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:21,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:21,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:41:21,872 INFO L87 Difference]: Start difference. First operand 51072 states and 58091 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 22:41:24,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:24,618 INFO L93 Difference]: Finished difference Result 127676 states and 145863 transitions. [2021-12-15 22:41:24,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:41:24,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 371 [2021-12-15 22:41:24,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:24,847 INFO L225 Difference]: With dead ends: 127676 [2021-12-15 22:41:24,847 INFO L226 Difference]: Without dead ends: 77357 [2021-12-15 22:41:24,870 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 22:41:24,871 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 739 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2447 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 2900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 2447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:24,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 311 Invalid, 2900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 2447 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:41:24,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77357 states. [2021-12-15 22:41:25,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77357 to 73602. [2021-12-15 22:41:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73602 states, 73601 states have (on average 1.1343731742775234) internal successors, (83491), 73601 states have internal predecessors, (83491), 0 states have call successors, (0), 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 22:41:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73602 states to 73602 states and 83491 transitions. [2021-12-15 22:41:25,938 INFO L78 Accepts]: Start accepts. Automaton has 73602 states and 83491 transitions. Word has length 371 [2021-12-15 22:41:25,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:25,939 INFO L470 AbstractCegarLoop]: Abstraction has 73602 states and 83491 transitions. [2021-12-15 22:41:25,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 22:41:25,940 INFO L276 IsEmpty]: Start isEmpty. Operand 73602 states and 83491 transitions. [2021-12-15 22:41:25,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-12-15 22:41:25,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:25,953 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:41:25,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:41:25,954 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:25,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:25,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1363789704, now seen corresponding path program 1 times [2021-12-15 22:41:25,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:25,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250655030] [2021-12-15 22:41:25,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:25,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 431 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-12-15 22:41:26,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:26,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250655030] [2021-12-15 22:41:26,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250655030] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:26,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:26,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:26,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649503189] [2021-12-15 22:41:26,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:26,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:26,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:26,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:26,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:41:26,296 INFO L87 Difference]: Start difference. First operand 73602 states and 83491 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 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 22:41:28,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:28,628 INFO L93 Difference]: Finished difference Result 169732 states and 194388 transitions. [2021-12-15 22:41:28,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:41:28,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 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 439 [2021-12-15 22:41:28,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:28,740 INFO L225 Difference]: With dead ends: 169732 [2021-12-15 22:41:28,740 INFO L226 Difference]: Without dead ends: 96883 [2021-12-15 22:41:28,784 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 22:41:28,785 INFO L933 BasicCegarLoop]: 1250 mSDtfsCounter, 698 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2303 mSolverCounterSat, 520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 2823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 520 IncrementalHoareTripleChecker+Valid, 2303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:28,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 1258 Invalid, 2823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [520 Valid, 2303 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 22:41:28,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96883 states. [2021-12-15 22:41:29,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96883 to 94630. [2021-12-15 22:41:29,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94630 states, 94629 states have (on average 1.1250250980143508) internal successors, (106460), 94629 states have internal predecessors, (106460), 0 states have call successors, (0), 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 22:41:30,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94630 states to 94630 states and 106460 transitions. [2021-12-15 22:41:30,149 INFO L78 Accepts]: Start accepts. Automaton has 94630 states and 106460 transitions. Word has length 439 [2021-12-15 22:41:30,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:30,151 INFO L470 AbstractCegarLoop]: Abstraction has 94630 states and 106460 transitions. [2021-12-15 22:41:30,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 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 22:41:30,151 INFO L276 IsEmpty]: Start isEmpty. Operand 94630 states and 106460 transitions. [2021-12-15 22:41:30,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2021-12-15 22:41:30,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:30,201 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 22:41:30,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:41:30,202 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:30,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:30,202 INFO L85 PathProgramCache]: Analyzing trace with hash -690336201, now seen corresponding path program 1 times [2021-12-15 22:41:30,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:30,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070085903] [2021-12-15 22:41:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:30,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 741 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-15 22:41:30,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:30,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070085903] [2021-12-15 22:41:30,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070085903] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:30,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:30,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:30,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828179030] [2021-12-15 22:41:30,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:30,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:30,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:30,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:30,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:41:30,336 INFO L87 Difference]: Start difference. First operand 94630 states and 106460 transitions. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 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 22:41:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:33,095 INFO L93 Difference]: Finished difference Result 191511 states and 215222 transitions. [2021-12-15 22:41:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:41:33,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 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 593 [2021-12-15 22:41:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:33,232 INFO L225 Difference]: With dead ends: 191511 [2021-12-15 22:41:33,233 INFO L226 Difference]: Without dead ends: 97634 [2021-12-15 22:41:33,490 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 22:41:33,490 INFO L933 BasicCegarLoop]: 1258 mSDtfsCounter, 590 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2432 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 2712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 2432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:33,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 1266 Invalid, 2712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 2432 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:41:33,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97634 states. [2021-12-15 22:41:34,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97634 to 94630. [2021-12-15 22:41:34,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94630 states, 94629 states have (on average 1.118272411205867) internal successors, (105821), 94629 states have internal predecessors, (105821), 0 states have call successors, (0), 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 22:41:34,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94630 states to 94630 states and 105821 transitions. [2021-12-15 22:41:34,431 INFO L78 Accepts]: Start accepts. Automaton has 94630 states and 105821 transitions. Word has length 593 [2021-12-15 22:41:34,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:34,432 INFO L470 AbstractCegarLoop]: Abstraction has 94630 states and 105821 transitions. [2021-12-15 22:41:34,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 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 22:41:34,432 INFO L276 IsEmpty]: Start isEmpty. Operand 94630 states and 105821 transitions. [2021-12-15 22:41:34,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2021-12-15 22:41:34,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:34,452 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 22:41:34,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:41:34,452 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:34,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:34,453 INFO L85 PathProgramCache]: Analyzing trace with hash -645768518, now seen corresponding path program 1 times [2021-12-15 22:41:34,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:34,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350331202] [2021-12-15 22:41:34,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:34,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 785 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-12-15 22:41:34,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:34,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350331202] [2021-12-15 22:41:34,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350331202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:34,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:34,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:34,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495667509] [2021-12-15 22:41:34,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:34,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:34,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:34,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:34,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:41:34,809 INFO L87 Difference]: Start difference. First operand 94630 states and 105821 transitions. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 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 22:41:38,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:38,315 INFO L93 Difference]: Finished difference Result 225306 states and 253255 transitions. [2021-12-15 22:41:38,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:41:38,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 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 615 [2021-12-15 22:41:38,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:38,484 INFO L225 Difference]: With dead ends: 225306 [2021-12-15 22:41:38,485 INFO L226 Difference]: Without dead ends: 131429 [2021-12-15 22:41:38,513 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 22:41:38,513 INFO L933 BasicCegarLoop]: 1325 mSDtfsCounter, 597 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2278 mSolverCounterSat, 530 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 530 IncrementalHoareTripleChecker+Valid, 2278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:38,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 1333 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [530 Valid, 2278 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 22:41:38,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131429 states. [2021-12-15 22:41:39,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131429 to 130678. [2021-12-15 22:41:39,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130678 states, 130677 states have (on average 1.0966046052480543) internal successors, (143301), 130677 states have internal predecessors, (143301), 0 states have call successors, (0), 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 22:41:40,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130678 states to 130678 states and 143301 transitions. [2021-12-15 22:41:40,230 INFO L78 Accepts]: Start accepts. Automaton has 130678 states and 143301 transitions. Word has length 615 [2021-12-15 22:41:40,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:40,231 INFO L470 AbstractCegarLoop]: Abstraction has 130678 states and 143301 transitions. [2021-12-15 22:41:40,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 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 22:41:40,231 INFO L276 IsEmpty]: Start isEmpty. Operand 130678 states and 143301 transitions. [2021-12-15 22:41:40,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2021-12-15 22:41:40,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:40,258 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-15 22:41:40,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 22:41:40,258 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:40,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:40,259 INFO L85 PathProgramCache]: Analyzing trace with hash -861548808, now seen corresponding path program 1 times [2021-12-15 22:41:40,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:40,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450518966] [2021-12-15 22:41:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:40,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 815 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-15 22:41:40,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:40,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450518966] [2021-12-15 22:41:40,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450518966] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:40,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:40,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:40,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962414199] [2021-12-15 22:41:40,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:40,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:40,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:40,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:40,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:41:40,463 INFO L87 Difference]: Start difference. First operand 130678 states and 143301 transitions. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 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 22:41:43,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:43,057 INFO L93 Difference]: Finished difference Result 265109 states and 290445 transitions. [2021-12-15 22:41:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:41:43,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 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 630 [2021-12-15 22:41:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:43,200 INFO L225 Difference]: With dead ends: 265109 [2021-12-15 22:41:43,200 INFO L226 Difference]: Without dead ends: 135184 [2021-12-15 22:41:43,686 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 22:41:43,687 INFO L933 BasicCegarLoop]: 1311 mSDtfsCounter, 598 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2172 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 2172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:43,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 1319 Invalid, 2463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 2172 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 22:41:43,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135184 states. [2021-12-15 22:41:45,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135184 to 129927. [2021-12-15 22:41:45,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129927 states, 129926 states have (on average 1.0953542785893509) internal successors, (142315), 129926 states have internal predecessors, (142315), 0 states have call successors, (0), 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 22:41:45,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129927 states to 129927 states and 142315 transitions. [2021-12-15 22:41:45,779 INFO L78 Accepts]: Start accepts. Automaton has 129927 states and 142315 transitions. Word has length 630 [2021-12-15 22:41:45,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:45,779 INFO L470 AbstractCegarLoop]: Abstraction has 129927 states and 142315 transitions. [2021-12-15 22:41:45,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 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 22:41:45,780 INFO L276 IsEmpty]: Start isEmpty. Operand 129927 states and 142315 transitions. [2021-12-15 22:41:45,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2021-12-15 22:41:45,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:45,801 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:41:45,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 22:41:45,804 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:45,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:45,804 INFO L85 PathProgramCache]: Analyzing trace with hash -200311801, now seen corresponding path program 1 times [2021-12-15 22:41:45,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:45,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135726648] [2021-12-15 22:41:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:45,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 1069 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-12-15 22:41:45,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:45,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135726648] [2021-12-15 22:41:45,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135726648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:45,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:45,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:41:45,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579863445] [2021-12-15 22:41:45,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:45,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:41:45,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:45,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:41:45,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:41:45,981 INFO L87 Difference]: Start difference. First operand 129927 states and 142315 transitions. Second operand has 4 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 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 22:41:49,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:49,862 INFO L93 Difference]: Finished difference Result 260603 states and 285421 transitions. [2021-12-15 22:41:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:41:49,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 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 649 [2021-12-15 22:41:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:50,059 INFO L225 Difference]: With dead ends: 260603 [2021-12-15 22:41:50,060 INFO L226 Difference]: Without dead ends: 131429 [2021-12-15 22:41:50,132 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 22:41:50,135 INFO L933 BasicCegarLoop]: 1283 mSDtfsCounter, 1322 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3913 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 4151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 3913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:50,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1322 Valid, 1297 Invalid, 4151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 3913 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 22:41:50,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131429 states. [2021-12-15 22:41:51,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131429 to 131429. [2021-12-15 22:41:51,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131429 states, 131428 states have (on average 1.0926286636028852) internal successors, (143602), 131428 states have internal predecessors, (143602), 0 states have call successors, (0), 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 22:41:52,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131429 states to 131429 states and 143602 transitions. [2021-12-15 22:41:52,013 INFO L78 Accepts]: Start accepts. Automaton has 131429 states and 143602 transitions. Word has length 649 [2021-12-15 22:41:52,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:52,014 INFO L470 AbstractCegarLoop]: Abstraction has 131429 states and 143602 transitions. [2021-12-15 22:41:52,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 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 22:41:52,014 INFO L276 IsEmpty]: Start isEmpty. Operand 131429 states and 143602 transitions. [2021-12-15 22:41:52,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 655 [2021-12-15 22:41:52,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:52,040 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:41:52,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 22:41:52,040 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:52,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:52,041 INFO L85 PathProgramCache]: Analyzing trace with hash 772290048, now seen corresponding path program 1 times [2021-12-15 22:41:52,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:52,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232977319] [2021-12-15 22:41:52,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:52,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 562 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-12-15 22:41:52,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:52,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232977319] [2021-12-15 22:41:52,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232977319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:52,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:52,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:52,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856427286] [2021-12-15 22:41:52,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:52,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:52,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:52,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:52,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:41:52,287 INFO L87 Difference]: Start difference. First operand 131429 states and 143602 transitions. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)