./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label50.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 451c7dc1e9ccbf0e1b2bfff20c93c74c6a2c224dafb02ba3904b999265578105 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 01:34:18,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 01:34:18,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 01:34:18,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 01:34:18,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 01:34:18,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 01:34:18,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 01:34:18,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 01:34:18,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 01:34:18,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 01:34:18,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 01:34:18,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 01:34:18,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 01:34:18,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 01:34:18,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 01:34:18,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 01:34:18,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 01:34:18,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 01:34:18,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 01:34:18,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 01:34:18,815 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 01:34:18,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 01:34:18,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 01:34:18,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 01:34:18,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 01:34:18,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 01:34:18,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 01:34:18,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 01:34:18,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 01:34:18,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 01:34:18,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 01:34:18,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 01:34:18,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 01:34:18,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 01:34:18,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 01:34:18,828 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 01:34:18,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 01:34:18,829 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 01:34:18,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 01:34:18,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 01:34:18,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 01:34:18,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 01:34:18,832 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 01:34:18,851 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 01:34:18,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 01:34:18,852 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 01:34:18,852 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 01:34:18,852 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 01:34:18,852 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 01:34:18,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 01:34:18,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 01:34:18,853 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 01:34:18,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 01:34:18,853 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 01:34:18,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 01:34:18,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 01:34:18,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 01:34:18,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 01:34:18,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 01:34:18,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 01:34:18,855 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 01:34:18,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 01:34:18,855 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 01:34:18,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 01:34:18,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 01:34:18,855 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 01:34:18,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 01:34:18,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 01:34:18,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 01:34:18,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 01:34:18,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 01:34:18,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 01:34:18,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 01:34:18,858 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 01:34:18,858 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 01:34:18,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 01:34:18,858 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 451c7dc1e9ccbf0e1b2bfff20c93c74c6a2c224dafb02ba3904b999265578105 [2022-07-12 01:34:19,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 01:34:19,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 01:34:19,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 01:34:19,093 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 01:34:19,093 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 01:34:19,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label50.c [2022-07-12 01:34:19,133 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e7a708d/f70645bd885142b483f42b1fc13ba67e/FLAG1f64e7527 [2022-07-12 01:34:19,683 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 01:34:19,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label50.c [2022-07-12 01:34:19,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e7a708d/f70645bd885142b483f42b1fc13ba67e/FLAG1f64e7527 [2022-07-12 01:34:20,168 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e7a708d/f70645bd885142b483f42b1fc13ba67e [2022-07-12 01:34:20,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 01:34:20,171 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 01:34:20,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 01:34:20,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 01:34:20,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 01:34:20,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 01:34:20" (1/1) ... [2022-07-12 01:34:20,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7979f5e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:34:20, skipping insertion in model container [2022-07-12 01:34:20,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 01:34:20" (1/1) ... [2022-07-12 01:34:20,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 01:34:20,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 01:34:20,379 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label50.c[1517,1530] [2022-07-12 01:34:20,789 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 01:34:20,794 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 01:34:20,806 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label50.c[1517,1530] [2022-07-12 01:34:20,986 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 01:34:20,998 INFO L208 MainTranslator]: Completed translation [2022-07-12 01:34:20,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:34:20 WrapperNode [2022-07-12 01:34:20,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 01:34:20,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 01:34:20,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 01:34:20,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 01:34:21,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:34:20" (1/1) ... [2022-07-12 01:34:21,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:34:20" (1/1) ... [2022-07-12 01:34:21,247 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-12 01:34:21,248 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 01:34:21,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 01:34:21,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 01:34:21,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 01:34:21,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:34:20" (1/1) ... [2022-07-12 01:34:21,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:34:20" (1/1) ... [2022-07-12 01:34:21,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:34:20" (1/1) ... [2022-07-12 01:34:21,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:34:20" (1/1) ... [2022-07-12 01:34:21,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:34:20" (1/1) ... [2022-07-12 01:34:21,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:34:20" (1/1) ... [2022-07-12 01:34:21,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:34:20" (1/1) ... [2022-07-12 01:34:21,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 01:34:21,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 01:34:21,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 01:34:21,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 01:34:21,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:34:20" (1/1) ... [2022-07-12 01:34:21,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 01:34:21,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 01:34:21,556 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 01:34:21,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 01:34:21,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 01:34:21,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 01:34:21,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 01:34:21,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 01:34:21,628 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 01:34:21,629 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 01:34:23,962 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 01:34:23,973 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 01:34:23,975 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 01:34:23,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 01:34:23 BoogieIcfgContainer [2022-07-12 01:34:23,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 01:34:23,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 01:34:23,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 01:34:23,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 01:34:23,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 01:34:20" (1/3) ... [2022-07-12 01:34:23,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5625107f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 01:34:23, skipping insertion in model container [2022-07-12 01:34:23,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:34:20" (2/3) ... [2022-07-12 01:34:23,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5625107f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 01:34:23, skipping insertion in model container [2022-07-12 01:34:23,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 01:34:23" (3/3) ... [2022-07-12 01:34:23,984 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label50.c [2022-07-12 01:34:23,994 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 01:34:23,994 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 01:34:24,050 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 01:34:24,057 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5eca3cc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@15244b42 [2022-07-12 01:34:24,057 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 01:34:24,073 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:24,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-12 01:34:24,080 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:34:24,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:34:24,081 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:34:24,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:34:24,085 INFO L85 PathProgramCache]: Analyzing trace with hash 647015545, now seen corresponding path program 1 times [2022-07-12 01:34:24,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:34:24,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116777392] [2022-07-12 01:34:24,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:34:24,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:34:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:34:24,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 01:34:24,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:34:24,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116777392] [2022-07-12 01:34:24,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116777392] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:34:24,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:34:24,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 01:34:24,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767197925] [2022-07-12 01:34:24,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:34:24,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:34:24,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:34:24,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:34:24,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:24,265 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:26,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:34:26,556 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2022-07-12 01:34:26,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:34:26,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-12 01:34:26,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:34:26,583 INFO L225 Difference]: With dead ends: 1667 [2022-07-12 01:34:26,583 INFO L226 Difference]: Without dead ends: 998 [2022-07-12 01:34:26,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:26,590 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 536 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-12 01:34:26,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 276 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-12 01:34:26,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-07-12 01:34:26,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2022-07-12 01:34:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.707441386340469) internal successors, (1675), 981 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:26,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2022-07-12 01:34:26,671 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 9 [2022-07-12 01:34:26,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:34:26,672 INFO L495 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2022-07-12 01:34:26,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:26,672 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2022-07-12 01:34:26,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 01:34:26,676 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:34:26,676 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 01:34:26,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 01:34:26,676 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:34:26,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:34:26,677 INFO L85 PathProgramCache]: Analyzing trace with hash -2030614627, now seen corresponding path program 1 times [2022-07-12 01:34:26,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:34:26,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270811184] [2022-07-12 01:34:26,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:34:26,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:34:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:34:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 01:34:26,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:34:26,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270811184] [2022-07-12 01:34:26,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270811184] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:34:26,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:34:26,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 01:34:26,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462526054] [2022-07-12 01:34:26,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:34:26,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:34:26,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:34:26,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:34:26,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:26,816 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:28,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:34:28,649 INFO L93 Difference]: Finished difference Result 2843 states and 4882 transitions. [2022-07-12 01:34:28,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:34:28,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2022-07-12 01:34:28,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:34:28,655 INFO L225 Difference]: With dead ends: 2843 [2022-07-12 01:34:28,656 INFO L226 Difference]: Without dead ends: 1863 [2022-07-12 01:34:28,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:28,659 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 409 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-12 01:34:28,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 495 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-12 01:34:28,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2022-07-12 01:34:28,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1857. [2022-07-12 01:34:28,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.4552801724137931) internal successors, (2701), 1856 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:28,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2701 transitions. [2022-07-12 01:34:28,688 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2701 transitions. Word has length 74 [2022-07-12 01:34:28,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:34:28,689 INFO L495 AbstractCegarLoop]: Abstraction has 1857 states and 2701 transitions. [2022-07-12 01:34:28,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:28,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2701 transitions. [2022-07-12 01:34:28,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-12 01:34:28,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:34:28,691 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 01:34:28,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 01:34:28,691 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:34:28,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:34:28,692 INFO L85 PathProgramCache]: Analyzing trace with hash -634340724, now seen corresponding path program 1 times [2022-07-12 01:34:28,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:34:28,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644849233] [2022-07-12 01:34:28,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:34:28,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:34:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:34:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 01:34:28,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:34:28,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644849233] [2022-07-12 01:34:28,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644849233] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:34:28,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:34:28,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 01:34:28,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196995349] [2022-07-12 01:34:28,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:34:28,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:34:28,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:34:28,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:34:28,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:28,769 INFO L87 Difference]: Start difference. First operand 1857 states and 2701 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:30,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:34:30,378 INFO L93 Difference]: Finished difference Result 5425 states and 7895 transitions. [2022-07-12 01:34:30,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:34:30,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2022-07-12 01:34:30,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:34:30,388 INFO L225 Difference]: With dead ends: 5425 [2022-07-12 01:34:30,388 INFO L226 Difference]: Without dead ends: 3570 [2022-07-12 01:34:30,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:30,396 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 387 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-12 01:34:30,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-12 01:34:30,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2022-07-12 01:34:30,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 2714. [2022-07-12 01:34:30,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2713 states have (on average 1.315886472539624) internal successors, (3570), 2713 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 3570 transitions. [2022-07-12 01:34:30,433 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 3570 transitions. Word has length 80 [2022-07-12 01:34:30,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:34:30,435 INFO L495 AbstractCegarLoop]: Abstraction has 2714 states and 3570 transitions. [2022-07-12 01:34:30,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:30,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 3570 transitions. [2022-07-12 01:34:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-12 01:34:30,442 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:34:30,443 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:34:30,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 01:34:30,443 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:34:30,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:34:30,444 INFO L85 PathProgramCache]: Analyzing trace with hash -516869556, now seen corresponding path program 1 times [2022-07-12 01:34:30,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:34:30,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373323588] [2022-07-12 01:34:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:34:30,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:34:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:34:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 01:34:30,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:34:30,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373323588] [2022-07-12 01:34:30,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373323588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:34:30,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:34:30,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 01:34:30,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862116600] [2022-07-12 01:34:30,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:34:30,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 01:34:30,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:34:30,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 01:34:30,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 01:34:30,643 INFO L87 Difference]: Start difference. First operand 2714 states and 3570 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:32,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:34:32,657 INFO L93 Difference]: Finished difference Result 7159 states and 9653 transitions. [2022-07-12 01:34:32,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 01:34:32,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 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 157 [2022-07-12 01:34:32,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:34:32,676 INFO L225 Difference]: With dead ends: 7159 [2022-07-12 01:34:32,676 INFO L226 Difference]: Without dead ends: 4447 [2022-07-12 01:34:32,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 01:34:32,680 INFO L413 NwaCegarLoop]: 756 mSDtfsCounter, 1658 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1773 mSolverCounterSat, 980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1658 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 2753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 980 IncrementalHoareTripleChecker+Valid, 1773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-12 01:34:32,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1658 Valid, 843 Invalid, 2753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [980 Valid, 1773 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-12 01:34:32,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4447 states. [2022-07-12 01:34:32,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4447 to 4424. [2022-07-12 01:34:32,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4424 states, 4423 states have (on average 1.2912050644359032) internal successors, (5711), 4423 states have internal predecessors, (5711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:32,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 5711 transitions. [2022-07-12 01:34:32,735 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 5711 transitions. Word has length 157 [2022-07-12 01:34:32,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:34:32,736 INFO L495 AbstractCegarLoop]: Abstraction has 4424 states and 5711 transitions. [2022-07-12 01:34:32,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:32,736 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 5711 transitions. [2022-07-12 01:34:32,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-12 01:34:32,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:34:32,738 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:34:32,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 01:34:32,738 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:34:32,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:34:32,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2127190533, now seen corresponding path program 1 times [2022-07-12 01:34:32,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:34:32,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952461889] [2022-07-12 01:34:32,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:34:32,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:34:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:34:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-12 01:34:32,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:34:32,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952461889] [2022-07-12 01:34:32,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952461889] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:34:32,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:34:32,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:34:32,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683980718] [2022-07-12 01:34:32,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:34:32,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:34:32,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:34:32,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:34:32,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:32,805 INFO L87 Difference]: Start difference. First operand 4424 states and 5711 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:34,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:34:34,778 INFO L93 Difference]: Finished difference Result 10593 states and 13804 transitions. [2022-07-12 01:34:34,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:34:34,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-07-12 01:34:34,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:34:34,794 INFO L225 Difference]: With dead ends: 10593 [2022-07-12 01:34:34,794 INFO L226 Difference]: Without dead ends: 6171 [2022-07-12 01:34:34,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:34,800 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 544 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-12 01:34:34,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 240 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 1459 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-12 01:34:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6171 states. [2022-07-12 01:34:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6171 to 6153. [2022-07-12 01:34:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 6152 states have (on average 1.303966189856957) internal successors, (8022), 6152 states have internal predecessors, (8022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 8022 transitions. [2022-07-12 01:34:34,877 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 8022 transitions. Word has length 163 [2022-07-12 01:34:34,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:34:34,878 INFO L495 AbstractCegarLoop]: Abstraction has 6153 states and 8022 transitions. [2022-07-12 01:34:34,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:34,878 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 8022 transitions. [2022-07-12 01:34:34,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-07-12 01:34:34,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:34:34,880 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:34:34,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 01:34:34,880 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:34:34,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:34:34,881 INFO L85 PathProgramCache]: Analyzing trace with hash -406876171, now seen corresponding path program 1 times [2022-07-12 01:34:34,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:34:34,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892658651] [2022-07-12 01:34:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:34:34,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:34:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:34:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 01:34:35,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:34:35,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892658651] [2022-07-12 01:34:35,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892658651] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 01:34:35,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819024229] [2022-07-12 01:34:35,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:34:35,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 01:34:35,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 01:34:35,032 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 01:34:35,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 01:34:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:34:35,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 01:34:35,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 01:34:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 01:34:35,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 01:34:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 01:34:35,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819024229] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 01:34:35,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 01:34:35,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2022-07-12 01:34:35,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820383519] [2022-07-12 01:34:35,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:34:35,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 01:34:35,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:34:35,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 01:34:35,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 01:34:35,749 INFO L87 Difference]: Start difference. First operand 6153 states and 8022 transitions. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:39,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:34:39,050 INFO L93 Difference]: Finished difference Result 19168 states and 25208 transitions. [2022-07-12 01:34:39,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 01:34:39,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 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 229 [2022-07-12 01:34:39,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:34:39,092 INFO L225 Difference]: With dead ends: 19168 [2022-07-12 01:34:39,092 INFO L226 Difference]: Without dead ends: 11736 [2022-07-12 01:34:39,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 01:34:39,100 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 785 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2707 mSolverCounterSat, 973 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 3680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 973 IncrementalHoareTripleChecker+Valid, 2707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-12 01:34:39,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 159 Invalid, 3680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [973 Valid, 2707 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-12 01:34:39,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11736 states. [2022-07-12 01:34:39,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11736 to 11269. [2022-07-12 01:34:39,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11269 states, 11268 states have (on average 1.2258608448704296) internal successors, (13813), 11268 states have internal predecessors, (13813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:39,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 13813 transitions. [2022-07-12 01:34:39,232 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 13813 transitions. Word has length 229 [2022-07-12 01:34:39,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:34:39,233 INFO L495 AbstractCegarLoop]: Abstraction has 11269 states and 13813 transitions. [2022-07-12 01:34:39,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 13813 transitions. [2022-07-12 01:34:39,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-07-12 01:34:39,235 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:34:39,236 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:34:39,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 01:34:39,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-12 01:34:39,453 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:34:39,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:34:39,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1585615049, now seen corresponding path program 1 times [2022-07-12 01:34:39,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:34:39,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327843967] [2022-07-12 01:34:39,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:34:39,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:34:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:34:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-12 01:34:39,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:34:39,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327843967] [2022-07-12 01:34:39,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327843967] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:34:39,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:34:39,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:34:39,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097826308] [2022-07-12 01:34:39,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:34:39,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:34:39,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:34:39,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:34:39,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:39,548 INFO L87 Difference]: Start difference. First operand 11269 states and 13813 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:34:41,297 INFO L93 Difference]: Finished difference Result 28062 states and 34701 transitions. [2022-07-12 01:34:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:34:41,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 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 247 [2022-07-12 01:34:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:34:41,325 INFO L225 Difference]: With dead ends: 28062 [2022-07-12 01:34:41,326 INFO L226 Difference]: Without dead ends: 15067 [2022-07-12 01:34:41,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:41,335 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 534 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-12 01:34:41,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 683 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-12 01:34:41,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15067 states. [2022-07-12 01:34:41,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15067 to 15063. [2022-07-12 01:34:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15063 states, 15062 states have (on average 1.1957907316425442) internal successors, (18011), 15062 states have internal predecessors, (18011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:41,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15063 states to 15063 states and 18011 transitions. [2022-07-12 01:34:41,483 INFO L78 Accepts]: Start accepts. Automaton has 15063 states and 18011 transitions. Word has length 247 [2022-07-12 01:34:41,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:34:41,483 INFO L495 AbstractCegarLoop]: Abstraction has 15063 states and 18011 transitions. [2022-07-12 01:34:41,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:41,483 INFO L276 IsEmpty]: Start isEmpty. Operand 15063 states and 18011 transitions. [2022-07-12 01:34:41,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-07-12 01:34:41,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:34:41,486 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:34:41,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 01:34:41,487 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:34:41,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:34:41,487 INFO L85 PathProgramCache]: Analyzing trace with hash 805102240, now seen corresponding path program 1 times [2022-07-12 01:34:41,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:34:41,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147280888] [2022-07-12 01:34:41,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:34:41,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:34:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:34:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 01:34:41,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:34:41,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147280888] [2022-07-12 01:34:41,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147280888] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:34:41,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:34:41,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:34:41,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628023377] [2022-07-12 01:34:41,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:34:41,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:34:41,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:34:41,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:34:41,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:41,596 INFO L87 Difference]: Start difference. First operand 15063 states and 18011 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) [2022-07-12 01:34:43,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:34:43,208 INFO L93 Difference]: Finished difference Result 39939 states and 47577 transitions. [2022-07-12 01:34:43,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:34:43,209 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 [2022-07-12 01:34:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:34:43,244 INFO L225 Difference]: With dead ends: 39939 [2022-07-12 01:34:43,244 INFO L226 Difference]: Without dead ends: 24026 [2022-07-12 01:34:43,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:43,259 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 299 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-12 01:34:43,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 790 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-12 01:34:43,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24026 states. [2022-07-12 01:34:43,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24026 to 23591. [2022-07-12 01:34:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23591 states, 23590 states have (on average 1.1493005510809664) internal successors, (27112), 23590 states have internal predecessors, (27112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23591 states to 23591 states and 27112 transitions. [2022-07-12 01:34:43,502 INFO L78 Accepts]: Start accepts. Automaton has 23591 states and 27112 transitions. Word has length 266 [2022-07-12 01:34:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:34:43,503 INFO L495 AbstractCegarLoop]: Abstraction has 23591 states and 27112 transitions. [2022-07-12 01:34:43,503 INFO L496 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) [2022-07-12 01:34:43,503 INFO L276 IsEmpty]: Start isEmpty. Operand 23591 states and 27112 transitions. [2022-07-12 01:34:43,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2022-07-12 01:34:43,509 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:34:43,509 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:34:43,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 01:34:43,509 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:34:43,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:34:43,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1154149176, now seen corresponding path program 1 times [2022-07-12 01:34:43,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:34:43,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145318887] [2022-07-12 01:34:43,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:34:43,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:34:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:34:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-12 01:34:43,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:34:43,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145318887] [2022-07-12 01:34:43,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145318887] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:34:43,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:34:43,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:34:43,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356972126] [2022-07-12 01:34:43,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:34:43,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:34:43,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:34:43,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:34:43,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:43,630 INFO L87 Difference]: Start difference. First operand 23591 states and 27112 transitions. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:45,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:34:45,090 INFO L93 Difference]: Finished difference Result 54405 states and 62873 transitions. [2022-07-12 01:34:45,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:34:45,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 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 348 [2022-07-12 01:34:45,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:34:45,130 INFO L225 Difference]: With dead ends: 54405 [2022-07-12 01:34:45,131 INFO L226 Difference]: Without dead ends: 30816 [2022-07-12 01:34:45,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:45,155 INFO L413 NwaCegarLoop]: 722 mSDtfsCounter, 275 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 01:34:45,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 784 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-12 01:34:45,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30816 states. [2022-07-12 01:34:45,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30816 to 30391. [2022-07-12 01:34:45,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30391 states, 30390 states have (on average 1.1316551497203027) internal successors, (34391), 30390 states have internal predecessors, (34391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30391 states to 30391 states and 34391 transitions. [2022-07-12 01:34:45,647 INFO L78 Accepts]: Start accepts. Automaton has 30391 states and 34391 transitions. Word has length 348 [2022-07-12 01:34:45,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:34:45,659 INFO L495 AbstractCegarLoop]: Abstraction has 30391 states and 34391 transitions. [2022-07-12 01:34:45,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:45,660 INFO L276 IsEmpty]: Start isEmpty. Operand 30391 states and 34391 transitions. [2022-07-12 01:34:45,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-07-12 01:34:45,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:34:45,671 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:34:45,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 01:34:45,672 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:34:45,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:34:45,673 INFO L85 PathProgramCache]: Analyzing trace with hash 595362029, now seen corresponding path program 1 times [2022-07-12 01:34:45,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:34:45,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509477142] [2022-07-12 01:34:45,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:34:45,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:34:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:34:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-12 01:34:45,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:34:45,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509477142] [2022-07-12 01:34:45,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509477142] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:34:45,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:34:45,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:34:45,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447989726] [2022-07-12 01:34:45,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:34:45,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:34:45,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:34:45,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:34:45,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:45,792 INFO L87 Difference]: Start difference. First operand 30391 states and 34391 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:47,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:34:47,617 INFO L93 Difference]: Finished difference Result 71893 states and 81834 transitions. [2022-07-12 01:34:47,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:34:47,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 [2022-07-12 01:34:47,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:34:47,735 INFO L225 Difference]: With dead ends: 71893 [2022-07-12 01:34:47,735 INFO L226 Difference]: Without dead ends: 41504 [2022-07-12 01:34:47,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:47,752 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 334 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-12 01:34:47,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 667 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1306 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-12 01:34:47,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41504 states. [2022-07-12 01:34:48,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41504 to 40197. [2022-07-12 01:34:48,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40197 states, 40196 states have (on average 1.1419295452283809) internal successors, (45901), 40196 states have internal predecessors, (45901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:48,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40197 states to 40197 states and 45901 transitions. [2022-07-12 01:34:48,286 INFO L78 Accepts]: Start accepts. Automaton has 40197 states and 45901 transitions. Word has length 371 [2022-07-12 01:34:48,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:34:48,287 INFO L495 AbstractCegarLoop]: Abstraction has 40197 states and 45901 transitions. [2022-07-12 01:34:48,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:48,287 INFO L276 IsEmpty]: Start isEmpty. Operand 40197 states and 45901 transitions. [2022-07-12 01:34:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2022-07-12 01:34:48,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:34:48,293 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:34:48,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 01:34:48,293 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:34:48,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:34:48,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1359032333, now seen corresponding path program 1 times [2022-07-12 01:34:48,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:34:48,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385253240] [2022-07-12 01:34:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:34:48,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:34:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:34:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-12 01:34:48,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:34:48,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385253240] [2022-07-12 01:34:48,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385253240] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:34:48,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:34:48,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:34:48,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682061109] [2022-07-12 01:34:48,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:34:48,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:34:48,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:34:48,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:34:48,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:48,493 INFO L87 Difference]: Start difference. First operand 40197 states and 45901 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:50,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:34:50,149 INFO L93 Difference]: Finished difference Result 88516 states and 100809 transitions. [2022-07-12 01:34:50,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:34:50,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 372 [2022-07-12 01:34:50,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:34:50,195 INFO L225 Difference]: With dead ends: 88516 [2022-07-12 01:34:50,195 INFO L226 Difference]: Without dead ends: 47896 [2022-07-12 01:34:50,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:50,217 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 511 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-12 01:34:50,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 167 Invalid, 1543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-12 01:34:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47896 states. [2022-07-12 01:34:50,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47896 to 39342. [2022-07-12 01:34:50,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39342 states, 39341 states have (on average 1.1435652372842582) internal successors, (44989), 39341 states have internal predecessors, (44989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:50,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39342 states to 39342 states and 44989 transitions. [2022-07-12 01:34:50,728 INFO L78 Accepts]: Start accepts. Automaton has 39342 states and 44989 transitions. Word has length 372 [2022-07-12 01:34:50,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:34:50,729 INFO L495 AbstractCegarLoop]: Abstraction has 39342 states and 44989 transitions. [2022-07-12 01:34:50,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:50,729 INFO L276 IsEmpty]: Start isEmpty. Operand 39342 states and 44989 transitions. [2022-07-12 01:34:50,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2022-07-12 01:34:50,735 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:34:50,736 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:34:50,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 01:34:50,736 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:34:50,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:34:50,737 INFO L85 PathProgramCache]: Analyzing trace with hash 990687732, now seen corresponding path program 1 times [2022-07-12 01:34:50,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:34:50,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008442430] [2022-07-12 01:34:50,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:34:50,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:34:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:34:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-12 01:34:50,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:34:50,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008442430] [2022-07-12 01:34:50,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008442430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:34:50,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:34:50,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:34:50,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873230228] [2022-07-12 01:34:50,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:34:50,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:34:50,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:34:50,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:34:50,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:50,862 INFO L87 Difference]: Start difference. First operand 39342 states and 44989 transitions. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:52,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:34:52,273 INFO L93 Difference]: Finished difference Result 77824 states and 89033 transitions. [2022-07-12 01:34:52,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:34:52,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 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 408 [2022-07-12 01:34:52,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:34:52,311 INFO L225 Difference]: With dead ends: 77824 [2022-07-12 01:34:52,311 INFO L226 Difference]: Without dead ends: 38483 [2022-07-12 01:34:52,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:52,332 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 496 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 01:34:52,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 723 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-12 01:34:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38483 states. [2022-07-12 01:34:52,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38483 to 37630. [2022-07-12 01:34:52,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37630 states, 37629 states have (on average 1.1056100348135747) internal successors, (41603), 37629 states have internal predecessors, (41603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:52,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37630 states to 37630 states and 41603 transitions. [2022-07-12 01:34:52,734 INFO L78 Accepts]: Start accepts. Automaton has 37630 states and 41603 transitions. Word has length 408 [2022-07-12 01:34:52,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:34:52,734 INFO L495 AbstractCegarLoop]: Abstraction has 37630 states and 41603 transitions. [2022-07-12 01:34:52,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:52,735 INFO L276 IsEmpty]: Start isEmpty. Operand 37630 states and 41603 transitions. [2022-07-12 01:34:52,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-07-12 01:34:52,740 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:34:52,740 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:34:52,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 01:34:52,741 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:34:52,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:34:52,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1137848729, now seen corresponding path program 1 times [2022-07-12 01:34:52,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:34:52,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563108401] [2022-07-12 01:34:52,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:34:52,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:34:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:34:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-12 01:34:52,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:34:52,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563108401] [2022-07-12 01:34:52,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563108401] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:34:52,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:34:52,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:34:52,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462045539] [2022-07-12 01:34:52,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:34:52,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:34:52,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:34:52,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:34:52,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:52,866 INFO L87 Difference]: Start difference. First operand 37630 states and 41603 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:54,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:34:54,449 INFO L93 Difference]: Finished difference Result 81659 states and 90642 transitions. [2022-07-12 01:34:54,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:34:54,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 414 [2022-07-12 01:34:54,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:34:54,508 INFO L225 Difference]: With dead ends: 81659 [2022-07-12 01:34:54,508 INFO L226 Difference]: Without dead ends: 44031 [2022-07-12 01:34:54,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:54,536 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 293 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-12 01:34:54,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 776 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1239 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-12 01:34:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44031 states. [2022-07-12 01:34:54,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44031 to 44024. [2022-07-12 01:34:54,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44024 states, 44023 states have (on average 1.1056720350725757) internal successors, (48675), 44023 states have internal predecessors, (48675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:55,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44024 states to 44024 states and 48675 transitions. [2022-07-12 01:34:55,036 INFO L78 Accepts]: Start accepts. Automaton has 44024 states and 48675 transitions. Word has length 414 [2022-07-12 01:34:55,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:34:55,036 INFO L495 AbstractCegarLoop]: Abstraction has 44024 states and 48675 transitions. [2022-07-12 01:34:55,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:55,036 INFO L276 IsEmpty]: Start isEmpty. Operand 44024 states and 48675 transitions. [2022-07-12 01:34:55,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2022-07-12 01:34:55,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:34:55,044 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:34:55,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 01:34:55,044 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:34:55,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:34:55,044 INFO L85 PathProgramCache]: Analyzing trace with hash 833353149, now seen corresponding path program 1 times [2022-07-12 01:34:55,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:34:55,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532407693] [2022-07-12 01:34:55,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:34:55,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:34:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:34:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-12 01:34:55,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:34:55,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532407693] [2022-07-12 01:34:55,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532407693] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:34:55,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:34:55,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:34:55,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565023982] [2022-07-12 01:34:55,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:34:55,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:34:55,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:34:55,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:34:55,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:55,187 INFO L87 Difference]: Start difference. First operand 44024 states and 48675 transitions. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:57,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:34:57,055 INFO L93 Difference]: Finished difference Result 107632 states and 119357 transitions. [2022-07-12 01:34:57,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:34:57,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 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 440 [2022-07-12 01:34:57,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:34:57,129 INFO L225 Difference]: With dead ends: 107632 [2022-07-12 01:34:57,130 INFO L226 Difference]: Without dead ends: 63609 [2022-07-12 01:34:57,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:57,158 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 505 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-12 01:34:57,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 296 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-12 01:34:57,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63609 states. [2022-07-12 01:34:57,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63609 to 60607. [2022-07-12 01:34:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60607 states, 60606 states have (on average 1.1047751047751049) internal successors, (66956), 60606 states have internal predecessors, (66956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60607 states to 60607 states and 66956 transitions. [2022-07-12 01:34:57,841 INFO L78 Accepts]: Start accepts. Automaton has 60607 states and 66956 transitions. Word has length 440 [2022-07-12 01:34:57,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:34:57,841 INFO L495 AbstractCegarLoop]: Abstraction has 60607 states and 66956 transitions. [2022-07-12 01:34:57,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:57,842 INFO L276 IsEmpty]: Start isEmpty. Operand 60607 states and 66956 transitions. [2022-07-12 01:34:57,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2022-07-12 01:34:57,850 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:34:57,850 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:34:57,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 01:34:57,851 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:34:57,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:34:57,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1337478149, now seen corresponding path program 1 times [2022-07-12 01:34:57,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:34:57,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537515703] [2022-07-12 01:34:57,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:34:57,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:34:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:34:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 276 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-12 01:34:57,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:34:57,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537515703] [2022-07-12 01:34:57,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537515703] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:34:57,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:34:57,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:34:57,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067078062] [2022-07-12 01:34:57,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:34:57,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:34:57,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:34:57,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:34:57,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:34:57,986 INFO L87 Difference]: Start difference. First operand 60607 states and 66956 transitions. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:34:59,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:34:59,922 INFO L93 Difference]: Finished difference Result 135689 states and 149734 transitions. [2022-07-12 01:34:59,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:34:59,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 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 442 [2022-07-12 01:34:59,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:35:00,005 INFO L225 Difference]: With dead ends: 135689 [2022-07-12 01:35:00,005 INFO L226 Difference]: Without dead ends: 75084 [2022-07-12 01:35:00,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:35:00,045 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 292 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-12 01:35:00,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 391 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-12 01:35:00,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75084 states. [2022-07-12 01:35:00,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75084 to 71664. [2022-07-12 01:35:00,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71664 states, 71663 states have (on average 1.0993678746354465) internal successors, (78784), 71663 states have internal predecessors, (78784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71664 states to 71664 states and 78784 transitions. [2022-07-12 01:35:00,933 INFO L78 Accepts]: Start accepts. Automaton has 71664 states and 78784 transitions. Word has length 442 [2022-07-12 01:35:00,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:35:00,933 INFO L495 AbstractCegarLoop]: Abstraction has 71664 states and 78784 transitions. [2022-07-12 01:35:00,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:00,933 INFO L276 IsEmpty]: Start isEmpty. Operand 71664 states and 78784 transitions. [2022-07-12 01:35:00,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-07-12 01:35:00,945 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:35:00,945 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:35:00,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 01:35:00,945 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:35:00,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:35:00,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1667919861, now seen corresponding path program 1 times [2022-07-12 01:35:00,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:35:00,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281556337] [2022-07-12 01:35:00,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:35:00,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:35:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:35:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 281 proven. 82 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 01:35:01,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:35:01,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281556337] [2022-07-12 01:35:01,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281556337] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 01:35:01,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138880734] [2022-07-12 01:35:01,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:35:01,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 01:35:01,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 01:35:01,080 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 01:35:01,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 01:35:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:35:01,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 01:35:01,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 01:35:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 206 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 01:35:01,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 01:35:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 370 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 01:35:02,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138880734] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 01:35:02,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 01:35:02,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 7 [2022-07-12 01:35:02,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101023103] [2022-07-12 01:35:02,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:35:02,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 01:35:02,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:35:02,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 01:35:02,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-12 01:35:02,280 INFO L87 Difference]: Start difference. First operand 71664 states and 78784 transitions. Second operand has 5 states, 5 states have (on average 95.8) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:04,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:35:04,822 INFO L93 Difference]: Finished difference Result 159947 states and 176112 transitions. [2022-07-12 01:35:04,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 01:35:04,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 95.8) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 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 479 [2022-07-12 01:35:04,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:35:04,920 INFO L225 Difference]: With dead ends: 159947 [2022-07-12 01:35:04,920 INFO L226 Difference]: Without dead ends: 86158 [2022-07-12 01:35:04,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 951 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-12 01:35:04,952 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 980 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 2127 mSolverCounterSat, 530 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 530 IncrementalHoareTripleChecker+Valid, 2127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-12 01:35:04,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 154 Invalid, 2657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [530 Valid, 2127 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-12 01:35:05,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86158 states. [2022-07-12 01:35:05,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86158 to 79351. [2022-07-12 01:35:05,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79351 states, 79350 states have (on average 1.100970384373031) internal successors, (87362), 79350 states have internal predecessors, (87362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79351 states to 79351 states and 87362 transitions. [2022-07-12 01:35:05,890 INFO L78 Accepts]: Start accepts. Automaton has 79351 states and 87362 transitions. Word has length 479 [2022-07-12 01:35:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:35:05,890 INFO L495 AbstractCegarLoop]: Abstraction has 79351 states and 87362 transitions. [2022-07-12 01:35:05,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.8) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 79351 states and 87362 transitions. [2022-07-12 01:35:05,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2022-07-12 01:35:05,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:35:05,901 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:35:05,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 01:35:06,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-12 01:35:06,102 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:35:06,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:35:06,103 INFO L85 PathProgramCache]: Analyzing trace with hash 283226457, now seen corresponding path program 1 times [2022-07-12 01:35:06,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:35:06,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252609864] [2022-07-12 01:35:06,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:35:06,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:35:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:35:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 334 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-07-12 01:35:06,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:35:06,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252609864] [2022-07-12 01:35:06,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252609864] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:35:06,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:35:06,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:35:06,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77690615] [2022-07-12 01:35:06,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:35:06,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:35:06,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:35:06,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:35:06,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:35:06,461 INFO L87 Difference]: Start difference. First operand 79351 states and 87362 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:08,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:35:08,388 INFO L93 Difference]: Finished difference Result 169783 states and 186845 transitions. [2022-07-12 01:35:08,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:35:08,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 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 491 [2022-07-12 01:35:08,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:35:08,477 INFO L225 Difference]: With dead ends: 169783 [2022-07-12 01:35:08,478 INFO L226 Difference]: Without dead ends: 90434 [2022-07-12 01:35:08,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:35:08,503 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 299 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-12 01:35:08,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 395 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-12 01:35:08,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90434 states. [2022-07-12 01:35:09,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90434 to 77651. [2022-07-12 01:35:09,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77651 states, 77650 states have (on average 1.0979781068898906) internal successors, (85258), 77650 states have internal predecessors, (85258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:09,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77651 states to 77651 states and 85258 transitions. [2022-07-12 01:35:09,414 INFO L78 Accepts]: Start accepts. Automaton has 77651 states and 85258 transitions. Word has length 491 [2022-07-12 01:35:09,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:35:09,414 INFO L495 AbstractCegarLoop]: Abstraction has 77651 states and 85258 transitions. [2022-07-12 01:35:09,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:09,415 INFO L276 IsEmpty]: Start isEmpty. Operand 77651 states and 85258 transitions. [2022-07-12 01:35:09,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2022-07-12 01:35:09,427 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:35:09,428 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:35:09,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-12 01:35:09,428 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:35:09,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:35:09,428 INFO L85 PathProgramCache]: Analyzing trace with hash -179173849, now seen corresponding path program 1 times [2022-07-12 01:35:09,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:35:09,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091983483] [2022-07-12 01:35:09,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:35:09,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:35:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:35:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 336 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-07-12 01:35:09,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:35:09,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091983483] [2022-07-12 01:35:09,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091983483] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:35:09,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:35:09,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 01:35:09,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486365340] [2022-07-12 01:35:09,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:35:09,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:35:09,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:35:09,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:35:09,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:35:09,812 INFO L87 Difference]: Start difference. First operand 77651 states and 85258 transitions. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:10,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:35:10,942 INFO L93 Difference]: Finished difference Result 151031 states and 165743 transitions. [2022-07-12 01:35:10,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:35:10,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 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 502 [2022-07-12 01:35:10,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:35:11,199 INFO L225 Difference]: With dead ends: 151031 [2022-07-12 01:35:11,199 INFO L226 Difference]: Without dead ends: 73382 [2022-07-12 01:35:11,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:35:11,222 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 620 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 01:35:11,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [620 Valid, 102 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-12 01:35:11,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73382 states. [2022-07-12 01:35:11,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73382 to 72941. [2022-07-12 01:35:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72941 states, 72940 states have (on average 1.0967781738415137) internal successors, (79999), 72940 states have internal predecessors, (79999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:11,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72941 states to 72941 states and 79999 transitions. [2022-07-12 01:35:11,970 INFO L78 Accepts]: Start accepts. Automaton has 72941 states and 79999 transitions. Word has length 502 [2022-07-12 01:35:11,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:35:11,970 INFO L495 AbstractCegarLoop]: Abstraction has 72941 states and 79999 transitions. [2022-07-12 01:35:11,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:11,970 INFO L276 IsEmpty]: Start isEmpty. Operand 72941 states and 79999 transitions. [2022-07-12 01:35:11,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2022-07-12 01:35:11,981 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:35:11,981 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:35:11,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-12 01:35:11,981 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:35:11,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:35:11,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1780962486, now seen corresponding path program 1 times [2022-07-12 01:35:11,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:35:11,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807048723] [2022-07-12 01:35:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:35:11,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:35:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:35:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-07-12 01:35:12,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:35:12,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807048723] [2022-07-12 01:35:12,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807048723] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:35:12,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:35:12,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 01:35:12,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808738380] [2022-07-12 01:35:12,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:35:12,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 01:35:12,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:35:12,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 01:35:12,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 01:35:12,124 INFO L87 Difference]: Start difference. First operand 72941 states and 79999 transitions. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:14,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:35:14,895 INFO L93 Difference]: Finished difference Result 170579 states and 187480 transitions. [2022-07-12 01:35:14,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 01:35:14,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 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 514 [2022-07-12 01:35:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:35:15,013 INFO L225 Difference]: With dead ends: 170579 [2022-07-12 01:35:15,013 INFO L226 Difference]: Without dead ends: 97640 [2022-07-12 01:35:15,027 INFO L412 NwaCegarLoop]: 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 [2022-07-12 01:35:15,028 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 789 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 2270 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 2601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 2270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-12 01:35:15,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 259 Invalid, 2601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 2270 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-12 01:35:15,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97640 states. [2022-07-12 01:35:15,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97640 to 86966. [2022-07-12 01:35:15,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86966 states, 86965 states have (on average 1.08697751969183) internal successors, (94529), 86965 states have internal predecessors, (94529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:15,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86966 states to 86966 states and 94529 transitions. [2022-07-12 01:35:15,981 INFO L78 Accepts]: Start accepts. Automaton has 86966 states and 94529 transitions. Word has length 514 [2022-07-12 01:35:15,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:35:15,981 INFO L495 AbstractCegarLoop]: Abstraction has 86966 states and 94529 transitions. [2022-07-12 01:35:15,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:15,981 INFO L276 IsEmpty]: Start isEmpty. Operand 86966 states and 94529 transitions. [2022-07-12 01:35:15,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2022-07-12 01:35:15,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:35:15,996 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:35:15,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-12 01:35:15,996 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:35:15,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:35:15,996 INFO L85 PathProgramCache]: Analyzing trace with hash 581190384, now seen corresponding path program 1 times [2022-07-12 01:35:15,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:35:15,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385513442] [2022-07-12 01:35:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:35:15,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:35:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:35:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 332 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-07-12 01:35:16,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:35:16,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385513442] [2022-07-12 01:35:16,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385513442] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:35:16,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:35:16,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:35:16,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528195784] [2022-07-12 01:35:16,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:35:16,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:35:16,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:35:16,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:35:16,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:35:16,282 INFO L87 Difference]: Start difference. First operand 86966 states and 94529 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:18,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:35:18,031 INFO L93 Difference]: Finished difference Result 179461 states and 194955 transitions. [2022-07-12 01:35:18,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:35:18,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 518 [2022-07-12 01:35:18,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:35:18,121 INFO L225 Difference]: With dead ends: 179461 [2022-07-12 01:35:18,122 INFO L226 Difference]: Without dead ends: 92497 [2022-07-12 01:35:18,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:35:18,152 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 272 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-12 01:35:18,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 324 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-12 01:35:18,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92497 states. [2022-07-12 01:35:19,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92497 to 83135. [2022-07-12 01:35:19,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83135 states, 83134 states have (on average 1.0868717973392354) internal successors, (90356), 83134 states have internal predecessors, (90356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83135 states to 83135 states and 90356 transitions. [2022-07-12 01:35:19,168 INFO L78 Accepts]: Start accepts. Automaton has 83135 states and 90356 transitions. Word has length 518 [2022-07-12 01:35:19,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:35:19,168 INFO L495 AbstractCegarLoop]: Abstraction has 83135 states and 90356 transitions. [2022-07-12 01:35:19,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 83135 states and 90356 transitions. [2022-07-12 01:35:19,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2022-07-12 01:35:19,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:35:19,180 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:35:19,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 01:35:19,180 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:35:19,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:35:19,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1508608903, now seen corresponding path program 1 times [2022-07-12 01:35:19,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:35:19,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526790120] [2022-07-12 01:35:19,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:35:19,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:35:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:35:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 361 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-07-12 01:35:19,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:35:19,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526790120] [2022-07-12 01:35:19,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526790120] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:35:19,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:35:19,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 01:35:19,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276224966] [2022-07-12 01:35:19,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:35:19,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 01:35:19,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:35:19,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 01:35:19,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 01:35:19,488 INFO L87 Difference]: Start difference. First operand 83135 states and 90356 transitions. Second operand has 4 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:22,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:35:22,044 INFO L93 Difference]: Finished difference Result 178644 states and 193856 transitions. [2022-07-12 01:35:22,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 01:35:22,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 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 520 [2022-07-12 01:35:22,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:35:22,149 INFO L225 Difference]: With dead ends: 178644 [2022-07-12 01:35:22,152 INFO L226 Difference]: Without dead ends: 95511 [2022-07-12 01:35:22,178 INFO L412 NwaCegarLoop]: 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 [2022-07-12 01:35:22,178 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 803 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 2578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-12 01:35:22,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 262 Invalid, 2578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 2266 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-12 01:35:22,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95511 states. [2022-07-12 01:35:23,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95511 to 83137. [2022-07-12 01:35:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83137 states, 83136 states have (on average 1.0868697074672826) internal successors, (90358), 83136 states have internal predecessors, (90358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:23,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83137 states to 83137 states and 90358 transitions. [2022-07-12 01:35:23,243 INFO L78 Accepts]: Start accepts. Automaton has 83137 states and 90358 transitions. Word has length 520 [2022-07-12 01:35:23,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:35:23,244 INFO L495 AbstractCegarLoop]: Abstraction has 83137 states and 90358 transitions. [2022-07-12 01:35:23,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:23,244 INFO L276 IsEmpty]: Start isEmpty. Operand 83137 states and 90358 transitions. [2022-07-12 01:35:23,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2022-07-12 01:35:23,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:35:23,258 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:35:23,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-12 01:35:23,259 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:35:23,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:35:23,259 INFO L85 PathProgramCache]: Analyzing trace with hash 269531449, now seen corresponding path program 1 times [2022-07-12 01:35:23,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:35:23,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740008568] [2022-07-12 01:35:23,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:35:23,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:35:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:35:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 376 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-12 01:35:23,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:35:23,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740008568] [2022-07-12 01:35:23,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740008568] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:35:23,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:35:23,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:35:23,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069011088] [2022-07-12 01:35:23,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:35:23,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:35:23,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:35:23,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:35:23,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:35:23,608 INFO L87 Difference]: Start difference. First operand 83137 states and 90358 transitions. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:25,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:35:25,481 INFO L93 Difference]: Finished difference Result 171813 states and 186389 transitions. [2022-07-12 01:35:25,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:35:25,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 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 535 [2022-07-12 01:35:25,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:35:25,575 INFO L225 Difference]: With dead ends: 171813 [2022-07-12 01:35:25,575 INFO L226 Difference]: Without dead ends: 88678 [2022-07-12 01:35:25,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:35:25,624 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 336 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-12 01:35:25,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 124 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-12 01:35:25,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88678 states. [2022-07-12 01:35:26,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88678 to 72036. [2022-07-12 01:35:26,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72036 states, 72035 states have (on average 1.0812244048032207) internal successors, (77886), 72035 states have internal predecessors, (77886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72036 states to 72036 states and 77886 transitions. [2022-07-12 01:35:26,715 INFO L78 Accepts]: Start accepts. Automaton has 72036 states and 77886 transitions. Word has length 535 [2022-07-12 01:35:26,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:35:26,715 INFO L495 AbstractCegarLoop]: Abstraction has 72036 states and 77886 transitions. [2022-07-12 01:35:26,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 72036 states and 77886 transitions. [2022-07-12 01:35:26,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2022-07-12 01:35:26,735 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:35:26,735 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-12 01:35:26,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-12 01:35:26,736 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:35:26,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:35:26,736 INFO L85 PathProgramCache]: Analyzing trace with hash 190732244, now seen corresponding path program 1 times [2022-07-12 01:35:26,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:35:26,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823099596] [2022-07-12 01:35:26,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:35:26,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:35:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:35:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 296 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 01:35:26,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:35:26,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823099596] [2022-07-12 01:35:26,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823099596] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 01:35:26,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970387948] [2022-07-12 01:35:26,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:35:26,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 01:35:26,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 01:35:26,946 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 01:35:26,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 01:35:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:35:27,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 01:35:27,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 01:35:28,164 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 384 proven. 82 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 01:35:28,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 01:35:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 384 proven. 82 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 01:35:30,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970387948] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 01:35:30,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 01:35:30,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-07-12 01:35:30,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890569805] [2022-07-12 01:35:30,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 01:35:30,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 01:35:30,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:35:30,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 01:35:30,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-12 01:35:30,643 INFO L87 Difference]: Start difference. First operand 72036 states and 77886 transitions. Second operand has 10 states, 10 states have (on average 178.7) internal successors, (1787), 9 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:37,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:35:37,539 INFO L93 Difference]: Finished difference Result 173468 states and 187041 transitions. [2022-07-12 01:35:37,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 01:35:37,540 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 178.7) internal successors, (1787), 9 states have internal predecessors, (1787), 0 states have call successors, (0), 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 698 [2022-07-12 01:35:37,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:35:37,651 INFO L225 Difference]: With dead ends: 173468 [2022-07-12 01:35:37,651 INFO L226 Difference]: Without dead ends: 101434 [2022-07-12 01:35:37,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1400 GetRequests, 1391 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-07-12 01:35:37,697 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 2487 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 7505 mSolverCounterSat, 1141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2487 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 8646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1141 IncrementalHoareTripleChecker+Valid, 7505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-07-12 01:35:37,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2487 Valid, 392 Invalid, 8646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1141 Valid, 7505 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-07-12 01:35:37,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101434 states. [2022-07-12 01:35:38,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101434 to 93752. [2022-07-12 01:35:38,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93752 states, 93751 states have (on average 1.0746445371249373) internal successors, (100749), 93751 states have internal predecessors, (100749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:38,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93752 states to 93752 states and 100749 transitions. [2022-07-12 01:35:38,825 INFO L78 Accepts]: Start accepts. Automaton has 93752 states and 100749 transitions. Word has length 698 [2022-07-12 01:35:38,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:35:38,825 INFO L495 AbstractCegarLoop]: Abstraction has 93752 states and 100749 transitions. [2022-07-12 01:35:38,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 178.7) internal successors, (1787), 9 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:38,826 INFO L276 IsEmpty]: Start isEmpty. Operand 93752 states and 100749 transitions. [2022-07-12 01:35:38,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 716 [2022-07-12 01:35:38,851 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:35:38,851 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:35:38,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 01:35:39,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 01:35:39,058 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:35:39,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:35:39,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1804569574, now seen corresponding path program 1 times [2022-07-12 01:35:39,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:35:39,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462892598] [2022-07-12 01:35:39,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:35:39,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:35:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:35:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 536 proven. 0 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2022-07-12 01:35:39,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:35:39,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462892598] [2022-07-12 01:35:39,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462892598] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:35:39,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:35:39,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 01:35:39,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986422173] [2022-07-12 01:35:39,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:35:39,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 01:35:39,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:35:39,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 01:35:39,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 01:35:39,565 INFO L87 Difference]: Start difference. First operand 93752 states and 100749 transitions. Second operand has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:42,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:35:42,186 INFO L93 Difference]: Finished difference Result 111645 states and 119661 transitions. [2022-07-12 01:35:42,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 01:35:42,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 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 715 [2022-07-12 01:35:42,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:35:42,300 INFO L225 Difference]: With dead ends: 111645 [2022-07-12 01:35:42,300 INFO L226 Difference]: Without dead ends: 111218 [2022-07-12 01:35:42,311 INFO L412 NwaCegarLoop]: 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 [2022-07-12 01:35:42,315 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 739 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 2401 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 2401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-12 01:35:42,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 167 Invalid, 2717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 2401 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-12 01:35:42,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111218 states. [2022-07-12 01:35:43,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111218 to 93752. [2022-07-12 01:35:43,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93752 states, 93751 states have (on average 1.0746338705720473) internal successors, (100748), 93751 states have internal predecessors, (100748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:43,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93752 states to 93752 states and 100748 transitions. [2022-07-12 01:35:43,494 INFO L78 Accepts]: Start accepts. Automaton has 93752 states and 100748 transitions. Word has length 715 [2022-07-12 01:35:43,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:35:43,494 INFO L495 AbstractCegarLoop]: Abstraction has 93752 states and 100748 transitions. [2022-07-12 01:35:43,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:43,495 INFO L276 IsEmpty]: Start isEmpty. Operand 93752 states and 100748 transitions. [2022-07-12 01:35:43,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 747 [2022-07-12 01:35:43,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:35:43,526 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:35:43,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-12 01:35:43,526 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:35:43,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:35:43,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1958834133, now seen corresponding path program 1 times [2022-07-12 01:35:43,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:35:43,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322938682] [2022-07-12 01:35:43,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:35:43,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:35:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:35:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 622 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-07-12 01:35:43,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:35:43,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322938682] [2022-07-12 01:35:43,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322938682] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:35:43,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:35:43,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 01:35:43,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517335154] [2022-07-12 01:35:43,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:35:43,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 01:35:43,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:35:43,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 01:35:43,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 01:35:43,962 INFO L87 Difference]: Start difference. First operand 93752 states and 100748 transitions. Second operand has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:46,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:35:46,501 INFO L93 Difference]: Finished difference Result 201119 states and 216313 transitions. [2022-07-12 01:35:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 01:35:46,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 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 746 [2022-07-12 01:35:46,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:35:46,622 INFO L225 Difference]: With dead ends: 201119 [2022-07-12 01:35:46,623 INFO L226 Difference]: Without dead ends: 106517 [2022-07-12 01:35:46,650 INFO L412 NwaCegarLoop]: 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 [2022-07-12 01:35:46,650 INFO L413 NwaCegarLoop]: 703 mSDtfsCounter, 536 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 2415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-12 01:35:46,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 762 Invalid, 2415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 2094 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-12 01:35:46,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106517 states. [2022-07-12 01:35:47,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106517 to 90743. [2022-07-12 01:35:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90743 states, 90742 states have (on average 1.0673006986841815) internal successors, (96849), 90742 states have internal predecessors, (96849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:47,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90743 states to 90743 states and 96849 transitions. [2022-07-12 01:35:47,788 INFO L78 Accepts]: Start accepts. Automaton has 90743 states and 96849 transitions. Word has length 746 [2022-07-12 01:35:47,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:35:47,789 INFO L495 AbstractCegarLoop]: Abstraction has 90743 states and 96849 transitions. [2022-07-12 01:35:47,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:47,789 INFO L276 IsEmpty]: Start isEmpty. Operand 90743 states and 96849 transitions. [2022-07-12 01:35:47,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 757 [2022-07-12 01:35:47,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:35:47,818 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:35:47,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-12 01:35:47,818 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:35:47,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:35:47,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1922507610, now seen corresponding path program 1 times [2022-07-12 01:35:47,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:35:47,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799927186] [2022-07-12 01:35:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:35:47,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:35:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:35:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 528 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-12 01:35:48,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:35:48,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799927186] [2022-07-12 01:35:48,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799927186] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:35:48,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:35:48,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:35:48,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520788112] [2022-07-12 01:35:48,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:35:48,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:35:48,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:35:48,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:35:48,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:35:48,251 INFO L87 Difference]: Start difference. First operand 90743 states and 96849 transitions. Second operand has 3 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:35:50,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:35:50,305 INFO L93 Difference]: Finished difference Result 192148 states and 204955 transitions. [2022-07-12 01:35:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:35:50,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 0 states have call successors, (0), 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 756 [2022-07-12 01:35:50,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:35:50,416 INFO L225 Difference]: With dead ends: 192148 [2022-07-12 01:35:50,416 INFO L226 Difference]: Without dead ends: 100549 [2022-07-12 01:35:50,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:35:50,440 INFO L413 NwaCegarLoop]: 665 mSDtfsCounter, 68 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-12 01:35:50,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 705 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-12 01:35:50,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100549 states.