./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label58.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/Problem13_label58.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 18d91842aba67b15ef1ce5fcca24e96a1a752cfb2bfcabae8ea7bcde2585be09 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 12:58:16,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 12:58:16,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 12:58:16,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 12:58:16,691 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 12:58:16,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 12:58:16,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 12:58:16,697 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 12:58:16,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 12:58:16,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 12:58:16,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 12:58:16,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 12:58:16,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 12:58:16,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 12:58:16,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 12:58:16,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 12:58:16,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 12:58:16,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 12:58:16,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 12:58:16,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 12:58:16,718 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 12:58:16,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 12:58:16,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 12:58:16,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 12:58:16,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 12:58:16,725 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 12:58:16,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 12:58:16,726 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 12:58:16,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 12:58:16,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 12:58:16,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 12:58:16,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 12:58:16,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 12:58:16,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 12:58:16,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 12:58:16,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 12:58:16,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 12:58:16,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 12:58:16,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 12:58:16,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 12:58:16,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 12:58:16,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 12:58:16,734 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 12:58:16,754 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 12:58:16,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 12:58:16,757 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 12:58:16,757 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 12:58:16,757 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 12:58:16,758 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 12:58:16,758 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 12:58:16,758 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 12:58:16,758 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 12:58:16,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 12:58:16,759 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 12:58:16,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 12:58:16,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 12:58:16,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 12:58:16,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 12:58:16,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 12:58:16,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 12:58:16,760 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 12:58:16,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 12:58:16,762 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 12:58:16,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 12:58:16,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 12:58:16,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 12:58:16,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 12:58:16,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 12:58:16,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 12:58:16,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 12:58:16,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 12:58:16,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 12:58:16,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 12:58:16,764 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 12:58:16,764 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 12:58:16,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 12:58:16,764 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18d91842aba67b15ef1ce5fcca24e96a1a752cfb2bfcabae8ea7bcde2585be09 [2022-07-13 12:58:16,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 12:58:16,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 12:58:16,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 12:58:16,965 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 12:58:16,965 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 12:58:16,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label58.c [2022-07-13 12:58:17,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70982df25/1a61dc85f42043f3ab80d97d0b7b367d/FLAG553624868 [2022-07-13 12:58:17,635 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 12:58:17,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label58.c [2022-07-13 12:58:17,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70982df25/1a61dc85f42043f3ab80d97d0b7b367d/FLAG553624868 [2022-07-13 12:58:17,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70982df25/1a61dc85f42043f3ab80d97d0b7b367d [2022-07-13 12:58:17,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 12:58:17,790 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 12:58:17,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 12:58:17,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 12:58:17,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 12:58:17,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 12:58:17" (1/1) ... [2022-07-13 12:58:17,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18e0cd97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:58:17, skipping insertion in model container [2022-07-13 12:58:17,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 12:58:17" (1/1) ... [2022-07-13 12:58:17,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 12:58:17,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 12:58:18,069 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/Problem13_label58.c[2071,2084] [2022-07-13 12:58:18,700 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 12:58:18,706 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 12:58:18,726 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/Problem13_label58.c[2071,2084] [2022-07-13 12:58:19,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 12:58:19,108 INFO L208 MainTranslator]: Completed translation [2022-07-13 12:58:19,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:58:19 WrapperNode [2022-07-13 12:58:19,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 12:58:19,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 12:58:19,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 12:58:19,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 12:58:19,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:58:19" (1/1) ... [2022-07-13 12:58:19,170 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:58:19" (1/1) ... [2022-07-13 12:58:19,629 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-13 12:58:19,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 12:58:19,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 12:58:19,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 12:58:19,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 12:58:19,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:58:19" (1/1) ... [2022-07-13 12:58:19,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:58:19" (1/1) ... [2022-07-13 12:58:19,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:58:19" (1/1) ... [2022-07-13 12:58:19,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:58:19" (1/1) ... [2022-07-13 12:58:20,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:58:19" (1/1) ... [2022-07-13 12:58:20,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:58:19" (1/1) ... [2022-07-13 12:58:20,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:58:19" (1/1) ... [2022-07-13 12:58:20,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 12:58:20,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 12:58:20,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 12:58:20,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 12:58:20,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:58:19" (1/1) ... [2022-07-13 12:58:20,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 12:58:20,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 12:58:20,232 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) [2022-07-13 12:58:20,263 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 [2022-07-13 12:58:20,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 12:58:20,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 12:58:20,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 12:58:20,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 12:58:20,331 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 12:58:20,332 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 12:58:23,787 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 12:58:23,799 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 12:58:23,799 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 12:58:23,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 12:58:23 BoogieIcfgContainer [2022-07-13 12:58:23,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 12:58:23,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 12:58:23,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 12:58:23,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 12:58:23,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 12:58:17" (1/3) ... [2022-07-13 12:58:23,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526c6043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 12:58:23, skipping insertion in model container [2022-07-13 12:58:23,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:58:19" (2/3) ... [2022-07-13 12:58:23,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526c6043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 12:58:23, skipping insertion in model container [2022-07-13 12:58:23,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 12:58:23" (3/3) ... [2022-07-13 12:58:23,807 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label58.c [2022-07-13 12:58:23,817 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 12:58:23,817 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 12:58:23,860 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 12:58:23,865 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@7618f445, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@532d4624 [2022-07-13 12:58:23,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 12:58:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:23,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-13 12:58:23,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:58:23,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:58:23,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:58:23,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:58:23,879 INFO L85 PathProgramCache]: Analyzing trace with hash -569068670, now seen corresponding path program 1 times [2022-07-13 12:58:23,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:58:23,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766726045] [2022-07-13 12:58:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:58:23,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:58:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:58:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:58:24,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:58:24,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766726045] [2022-07-13 12:58:24,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766726045] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:58:24,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:58:24,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:58:24,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831095433] [2022-07-13 12:58:24,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:58:24,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:58:24,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:58:24,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:58:24,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:58:24,051 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:27,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:58:27,408 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2022-07-13 12:58:27,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:58:27,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-07-13 12:58:27,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:58:27,426 INFO L225 Difference]: With dead ends: 3121 [2022-07-13 12:58:27,426 INFO L226 Difference]: Without dead ends: 1944 [2022-07-13 12:58:27,431 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 [2022-07-13 12:58:27,433 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 977 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-13 12:58:27,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-13 12:58:27,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2022-07-13 12:58:27,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2022-07-13 12:58:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2022-07-13 12:58:27,513 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 12 [2022-07-13 12:58:27,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:58:27,513 INFO L495 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2022-07-13 12:58:27,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:27,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2022-07-13 12:58:27,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-13 12:58:27,516 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:58:27,516 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 12:58:27,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 12:58:27,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:58:27,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:58:27,518 INFO L85 PathProgramCache]: Analyzing trace with hash -873389910, now seen corresponding path program 1 times [2022-07-13 12:58:27,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:58:27,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642534775] [2022-07-13 12:58:27,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:58:27,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:58:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:58:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:58:27,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:58:27,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642534775] [2022-07-13 12:58:27,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642534775] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:58:27,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:58:27,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:58:27,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804528299] [2022-07-13 12:58:27,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:58:27,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:58:27,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:58:27,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:58:27,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:58:27,681 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:30,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:58:30,524 INFO L93 Difference]: Finished difference Result 5351 states and 9369 transitions. [2022-07-13 12:58:30,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:58:30,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-07-13 12:58:30,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:58:30,535 INFO L225 Difference]: With dead ends: 5351 [2022-07-13 12:58:30,535 INFO L226 Difference]: Without dead ends: 3480 [2022-07-13 12:58:30,538 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 [2022-07-13 12:58:30,539 INFO L413 NwaCegarLoop]: 926 mSDtfsCounter, 884 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-13 12:58:30,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 1079 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-13 12:58:30,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2022-07-13 12:58:30,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3479. [2022-07-13 12:58:30,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 3478 states have (on average 1.518688901667625) internal successors, (5282), 3478 states have internal predecessors, (5282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 5282 transitions. [2022-07-13 12:58:30,582 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 5282 transitions. Word has length 77 [2022-07-13 12:58:30,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:58:30,582 INFO L495 AbstractCegarLoop]: Abstraction has 3479 states and 5282 transitions. [2022-07-13 12:58:30,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:30,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 5282 transitions. [2022-07-13 12:58:30,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 12:58:30,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:58:30,584 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 12:58:30,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 12:58:30,585 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:58:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:58:30,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1023071909, now seen corresponding path program 1 times [2022-07-13 12:58:30,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:58:30,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927021802] [2022-07-13 12:58:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:58:30,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:58:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:58:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:58:30,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:58:30,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927021802] [2022-07-13 12:58:30,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927021802] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:58:30,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:58:30,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:58:30,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751597662] [2022-07-13 12:58:30,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:58:30,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:58:30,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:58:30,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:58:30,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:58:30,654 INFO L87 Difference]: Start difference. First operand 3479 states and 5282 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:33,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:58:33,611 INFO L93 Difference]: Finished difference Result 10144 states and 15439 transitions. [2022-07-13 12:58:33,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:58:33,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2022-07-13 12:58:33,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:58:33,644 INFO L225 Difference]: With dead ends: 10144 [2022-07-13 12:58:33,645 INFO L226 Difference]: Without dead ends: 6667 [2022-07-13 12:58:33,661 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 [2022-07-13 12:58:33,663 INFO L413 NwaCegarLoop]: 745 mSDtfsCounter, 977 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 3325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-13 12:58:33,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 879 Invalid, 3325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-13 12:58:33,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2022-07-13 12:58:33,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6657. [2022-07-13 12:58:33,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 6656 states have (on average 1.3728966346153846) internal successors, (9138), 6656 states have internal predecessors, (9138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 9138 transitions. [2022-07-13 12:58:33,833 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 9138 transitions. Word has length 79 [2022-07-13 12:58:33,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:58:33,834 INFO L495 AbstractCegarLoop]: Abstraction has 6657 states and 9138 transitions. [2022-07-13 12:58:33,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 9138 transitions. [2022-07-13 12:58:33,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-13 12:58:33,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:58:33,835 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 12:58:33,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 12:58:33,836 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:58:33,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:58:33,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1614025002, now seen corresponding path program 1 times [2022-07-13 12:58:33,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:58:33,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821214530] [2022-07-13 12:58:33,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:58:33,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:58:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:58:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:58:33,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:58:33,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821214530] [2022-07-13 12:58:33,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821214530] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:58:33,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:58:33,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:58:33,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955211288] [2022-07-13 12:58:33,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:58:33,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:58:33,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:58:33,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:58:33,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:58:33,884 INFO L87 Difference]: Start difference. First operand 6657 states and 9138 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:36,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:58:36,394 INFO L93 Difference]: Finished difference Result 19637 states and 26969 transitions. [2022-07-13 12:58:36,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:58:36,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2022-07-13 12:58:36,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:58:36,426 INFO L225 Difference]: With dead ends: 19637 [2022-07-13 12:58:36,426 INFO L226 Difference]: Without dead ends: 12982 [2022-07-13 12:58:36,436 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 [2022-07-13 12:58:36,437 INFO L413 NwaCegarLoop]: 1012 mSDtfsCounter, 791 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-13 12:58:36,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 1163 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-13 12:58:36,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12982 states. [2022-07-13 12:58:36,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12982 to 12175. [2022-07-13 12:58:36,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12175 states, 12174 states have (on average 1.2529160505996386) internal successors, (15253), 12174 states have internal predecessors, (15253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:36,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12175 states to 12175 states and 15253 transitions. [2022-07-13 12:58:36,593 INFO L78 Accepts]: Start accepts. Automaton has 12175 states and 15253 transitions. Word has length 85 [2022-07-13 12:58:36,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:58:36,594 INFO L495 AbstractCegarLoop]: Abstraction has 12175 states and 15253 transitions. [2022-07-13 12:58:36,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:36,594 INFO L276 IsEmpty]: Start isEmpty. Operand 12175 states and 15253 transitions. [2022-07-13 12:58:36,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-13 12:58:36,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:58:36,598 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 12:58:36,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 12:58:36,599 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:58:36,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:58:36,599 INFO L85 PathProgramCache]: Analyzing trace with hash -583563538, now seen corresponding path program 1 times [2022-07-13 12:58:36,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:58:36,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555620462] [2022-07-13 12:58:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:58:36,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:58:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:58:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:58:36,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:58:36,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555620462] [2022-07-13 12:58:36,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555620462] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 12:58:36,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095731657] [2022-07-13 12:58:36,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:58:36,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 12:58:36,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 12:58:36,735 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) [2022-07-13 12:58:36,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 12:58:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:58:36,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 12:58:36,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 12:58:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 12:58:36,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 12:58:36,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095731657] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:58:36,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 12:58:36,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-13 12:58:36,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667406849] [2022-07-13 12:58:36,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:58:36,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:58:36,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:58:36,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:58:36,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 12:58:36,905 INFO L87 Difference]: Start difference. First operand 12175 states and 15253 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:39,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:58:39,772 INFO L93 Difference]: Finished difference Result 36312 states and 45491 transitions. [2022-07-13 12:58:39,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:58:39,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 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 101 [2022-07-13 12:58:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:58:39,808 INFO L225 Difference]: With dead ends: 36312 [2022-07-13 12:58:39,809 INFO L226 Difference]: Without dead ends: 24139 [2022-07-13 12:58:39,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 12:58:39,822 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 1053 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 2631 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 3175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 2631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-13 12:58:39,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1053 Valid, 922 Invalid, 3175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 2631 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-13 12:58:39,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24139 states. [2022-07-13 12:58:40,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24139 to 24121. [2022-07-13 12:58:40,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24121 states, 24120 states have (on average 1.2004145936981758) internal successors, (28954), 24120 states have internal predecessors, (28954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:40,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24121 states to 24121 states and 28954 transitions. [2022-07-13 12:58:40,149 INFO L78 Accepts]: Start accepts. Automaton has 24121 states and 28954 transitions. Word has length 101 [2022-07-13 12:58:40,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:58:40,154 INFO L495 AbstractCegarLoop]: Abstraction has 24121 states and 28954 transitions. [2022-07-13 12:58:40,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:40,155 INFO L276 IsEmpty]: Start isEmpty. Operand 24121 states and 28954 transitions. [2022-07-13 12:58:40,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-07-13 12:58:40,161 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:58:40,161 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:58:40,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 12:58:40,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 12:58:40,376 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:58:40,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:58:40,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1395611265, now seen corresponding path program 1 times [2022-07-13 12:58:40,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:58:40,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237643598] [2022-07-13 12:58:40,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:58:40,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:58:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:58:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 12:58:40,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:58:40,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237643598] [2022-07-13 12:58:40,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237643598] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:58:40,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:58:40,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:58:40,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25288524] [2022-07-13 12:58:40,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:58:40,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:58:40,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:58:40,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:58:40,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:58:40,490 INFO L87 Difference]: Start difference. First operand 24121 states and 28954 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:42,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:58:42,725 INFO L93 Difference]: Finished difference Result 49027 states and 58708 transitions. [2022-07-13 12:58:42,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:58:42,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 204 [2022-07-13 12:58:42,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:58:42,812 INFO L225 Difference]: With dead ends: 49027 [2022-07-13 12:58:42,827 INFO L226 Difference]: Without dead ends: 24908 [2022-07-13 12:58:42,854 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 [2022-07-13 12:58:42,870 INFO L413 NwaCegarLoop]: 1083 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 12:58:42,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 1212 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 12:58:42,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24908 states. [2022-07-13 12:58:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24908 to 24908. [2022-07-13 12:58:43,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24908 states, 24907 states have (on average 1.1942827317621552) internal successors, (29746), 24907 states have internal predecessors, (29746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24908 states to 24908 states and 29746 transitions. [2022-07-13 12:58:43,179 INFO L78 Accepts]: Start accepts. Automaton has 24908 states and 29746 transitions. Word has length 204 [2022-07-13 12:58:43,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:58:43,180 INFO L495 AbstractCegarLoop]: Abstraction has 24908 states and 29746 transitions. [2022-07-13 12:58:43,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:43,180 INFO L276 IsEmpty]: Start isEmpty. Operand 24908 states and 29746 transitions. [2022-07-13 12:58:43,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-07-13 12:58:43,182 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:58:43,182 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:58:43,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 12:58:43,182 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:58:43,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:58:43,183 INFO L85 PathProgramCache]: Analyzing trace with hash -302953078, now seen corresponding path program 1 times [2022-07-13 12:58:43,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:58:43,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920227843] [2022-07-13 12:58:43,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:58:43,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:58:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:58:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:58:43,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:58:43,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920227843] [2022-07-13 12:58:43,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920227843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:58:43,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:58:43,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:58:43,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190124903] [2022-07-13 12:58:43,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:58:43,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:58:43,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:58:43,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:58:43,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:58:43,277 INFO L87 Difference]: Start difference. First operand 24908 states and 29746 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:46,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:58:46,427 INFO L93 Difference]: Finished difference Result 61634 states and 75007 transitions. [2022-07-13 12:58:46,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:58:46,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 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 211 [2022-07-13 12:58:46,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:58:46,469 INFO L225 Difference]: With dead ends: 61634 [2022-07-13 12:58:46,470 INFO L226 Difference]: Without dead ends: 37515 [2022-07-13 12:58:46,491 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 [2022-07-13 12:58:46,491 INFO L413 NwaCegarLoop]: 826 mSDtfsCounter, 860 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 3305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-13 12:58:46,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 946 Invalid, 3305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 2390 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-13 12:58:46,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37515 states. [2022-07-13 12:58:46,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37515 to 35930. [2022-07-13 12:58:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35930 states, 35929 states have (on average 1.1822761557516213) internal successors, (42478), 35929 states have internal predecessors, (42478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:46,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35930 states to 35930 states and 42478 transitions. [2022-07-13 12:58:46,978 INFO L78 Accepts]: Start accepts. Automaton has 35930 states and 42478 transitions. Word has length 211 [2022-07-13 12:58:46,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:58:46,978 INFO L495 AbstractCegarLoop]: Abstraction has 35930 states and 42478 transitions. [2022-07-13 12:58:46,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:46,979 INFO L276 IsEmpty]: Start isEmpty. Operand 35930 states and 42478 transitions. [2022-07-13 12:58:46,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-07-13 12:58:46,981 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:58:46,982 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:58:46,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 12:58:46,982 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:58:46,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:58:46,983 INFO L85 PathProgramCache]: Analyzing trace with hash -679347293, now seen corresponding path program 1 times [2022-07-13 12:58:46,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:58:46,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195935304] [2022-07-13 12:58:46,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:58:46,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:58:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:58:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:58:47,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:58:47,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195935304] [2022-07-13 12:58:47,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195935304] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:58:47,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:58:47,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:58:47,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631383558] [2022-07-13 12:58:47,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:58:47,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:58:47,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:58:47,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:58:47,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:58:47,069 INFO L87 Difference]: Start difference. First operand 35930 states and 42478 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:49,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:58:49,541 INFO L93 Difference]: Finished difference Result 70920 states and 83955 transitions. [2022-07-13 12:58:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:58:49,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 226 [2022-07-13 12:58:49,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:58:49,601 INFO L225 Difference]: With dead ends: 70920 [2022-07-13 12:58:49,602 INFO L226 Difference]: Without dead ends: 35779 [2022-07-13 12:58:49,626 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 [2022-07-13 12:58:49,627 INFO L413 NwaCegarLoop]: 1504 mSDtfsCounter, 1036 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 12:58:49,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1036 Valid, 1641 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 12:58:49,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35779 states. [2022-07-13 12:58:49,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35779 to 34201. [2022-07-13 12:58:49,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34201 states, 34200 states have (on average 1.1295906432748537) internal successors, (38632), 34200 states have internal predecessors, (38632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:49,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34201 states to 34201 states and 38632 transitions. [2022-07-13 12:58:49,921 INFO L78 Accepts]: Start accepts. Automaton has 34201 states and 38632 transitions. Word has length 226 [2022-07-13 12:58:49,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:58:49,923 INFO L495 AbstractCegarLoop]: Abstraction has 34201 states and 38632 transitions. [2022-07-13 12:58:49,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:49,923 INFO L276 IsEmpty]: Start isEmpty. Operand 34201 states and 38632 transitions. [2022-07-13 12:58:49,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-07-13 12:58:49,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:58:49,926 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:58:49,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 12:58:49,926 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:58:49,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:58:49,927 INFO L85 PathProgramCache]: Analyzing trace with hash -107437248, now seen corresponding path program 1 times [2022-07-13 12:58:49,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:58:49,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553697607] [2022-07-13 12:58:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:58:49,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:58:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:58:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-13 12:58:50,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:58:50,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553697607] [2022-07-13 12:58:50,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553697607] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:58:50,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:58:50,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:58:50,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039689681] [2022-07-13 12:58:50,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:58:50,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:58:50,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:58:50,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:58:50,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:58:50,052 INFO L87 Difference]: Start difference. First operand 34201 states and 38632 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:54,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:58:54,737 INFO L93 Difference]: Finished difference Result 109366 states and 124639 transitions. [2022-07-13 12:58:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:58:54,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 300 [2022-07-13 12:58:54,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:58:54,822 INFO L225 Difference]: With dead ends: 109366 [2022-07-13 12:58:54,822 INFO L226 Difference]: Without dead ends: 75954 [2022-07-13 12:58:54,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:58:54,846 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 1807 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 4623 mSolverCounterSat, 1173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 5796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1173 IncrementalHoareTripleChecker+Valid, 4623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 12:58:54,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1807 Valid, 752 Invalid, 5796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1173 Valid, 4623 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 12:58:54,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75954 states. [2022-07-13 12:58:55,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75954 to 72802. [2022-07-13 12:58:55,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72802 states, 72801 states have (on average 1.120424169997665) internal successors, (81568), 72801 states have internal predecessors, (81568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:55,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72802 states to 72802 states and 81568 transitions. [2022-07-13 12:58:55,522 INFO L78 Accepts]: Start accepts. Automaton has 72802 states and 81568 transitions. Word has length 300 [2022-07-13 12:58:55,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:58:55,523 INFO L495 AbstractCegarLoop]: Abstraction has 72802 states and 81568 transitions. [2022-07-13 12:58:55,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:58:55,523 INFO L276 IsEmpty]: Start isEmpty. Operand 72802 states and 81568 transitions. [2022-07-13 12:58:55,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-07-13 12:58:55,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:58:55,527 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:58:55,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 12:58:55,527 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:58:55,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:58:55,527 INFO L85 PathProgramCache]: Analyzing trace with hash -697400388, now seen corresponding path program 1 times [2022-07-13 12:58:55,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:58:55,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287262365] [2022-07-13 12:58:55,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:58:55,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:58:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:58:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 12:58:55,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:58:55,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287262365] [2022-07-13 12:58:55,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287262365] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:58:55,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:58:55,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:58:55,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108132515] [2022-07-13 12:58:55,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:58:55,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:58:55,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:58:55,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:58:55,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:58:55,605 INFO L87 Difference]: Start difference. First operand 72802 states and 81568 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:02,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:59:02,072 INFO L93 Difference]: Finished difference Result 202479 states and 227410 transitions. [2022-07-13 12:59:02,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:59:02,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 300 [2022-07-13 12:59:02,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:59:02,229 INFO L225 Difference]: With dead ends: 202479 [2022-07-13 12:59:02,230 INFO L226 Difference]: Without dead ends: 130466 [2022-07-13 12:59:02,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:59:02,257 INFO L413 NwaCegarLoop]: 542 mSDtfsCounter, 1726 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 5971 mSolverCounterSat, 1114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1726 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 7085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1114 IncrementalHoareTripleChecker+Valid, 5971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-07-13 12:59:02,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1726 Valid, 731 Invalid, 7085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1114 Valid, 5971 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-07-13 12:59:02,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130466 states. [2022-07-13 12:59:03,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130466 to 128762. [2022-07-13 12:59:03,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128762 states, 128761 states have (on average 1.1134427349896319) internal successors, (143368), 128761 states have internal predecessors, (143368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:03,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128762 states to 128762 states and 143368 transitions. [2022-07-13 12:59:03,698 INFO L78 Accepts]: Start accepts. Automaton has 128762 states and 143368 transitions. Word has length 300 [2022-07-13 12:59:03,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:59:03,699 INFO L495 AbstractCegarLoop]: Abstraction has 128762 states and 143368 transitions. [2022-07-13 12:59:03,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:03,699 INFO L276 IsEmpty]: Start isEmpty. Operand 128762 states and 143368 transitions. [2022-07-13 12:59:03,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-07-13 12:59:03,706 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:59:03,707 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:59:03,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 12:59:03,708 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:59:03,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:59:03,708 INFO L85 PathProgramCache]: Analyzing trace with hash -920626445, now seen corresponding path program 1 times [2022-07-13 12:59:03,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:59:03,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207909893] [2022-07-13 12:59:03,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:59:03,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:59:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:59:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-13 12:59:03,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:59:03,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207909893] [2022-07-13 12:59:03,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207909893] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:59:03,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:59:03,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:59:03,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580531886] [2022-07-13 12:59:03,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:59:03,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:59:03,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:59:03,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:59:03,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:59:03,852 INFO L87 Difference]: Start difference. First operand 128762 states and 143368 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:07,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:59:07,142 INFO L93 Difference]: Finished difference Result 243358 states and 271906 transitions. [2022-07-13 12:59:07,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:59:07,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 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 309 [2022-07-13 12:59:07,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:59:07,282 INFO L225 Difference]: With dead ends: 243358 [2022-07-13 12:59:07,282 INFO L226 Difference]: Without dead ends: 127987 [2022-07-13 12:59:07,326 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 [2022-07-13 12:59:07,326 INFO L413 NwaCegarLoop]: 1000 mSDtfsCounter, 728 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 2688 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 2692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-13 12:59:07,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1176 Invalid, 2692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2688 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-13 12:59:07,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127987 states. [2022-07-13 12:59:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127987 to 127188. [2022-07-13 12:59:08,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127188 states, 127187 states have (on average 1.1140525368158696) internal successors, (141693), 127187 states have internal predecessors, (141693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:09,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127188 states to 127188 states and 141693 transitions. [2022-07-13 12:59:09,021 INFO L78 Accepts]: Start accepts. Automaton has 127188 states and 141693 transitions. Word has length 309 [2022-07-13 12:59:09,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:59:09,021 INFO L495 AbstractCegarLoop]: Abstraction has 127188 states and 141693 transitions. [2022-07-13 12:59:09,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:09,022 INFO L276 IsEmpty]: Start isEmpty. Operand 127188 states and 141693 transitions. [2022-07-13 12:59:09,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-07-13 12:59:09,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:59:09,026 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:59:09,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 12:59:09,029 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:59:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:59:09,029 INFO L85 PathProgramCache]: Analyzing trace with hash -89253303, now seen corresponding path program 1 times [2022-07-13 12:59:09,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:59:09,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800596695] [2022-07-13 12:59:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:59:09,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:59:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:59:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 188 proven. 113 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 12:59:09,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:59:09,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800596695] [2022-07-13 12:59:09,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800596695] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 12:59:09,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131462185] [2022-07-13 12:59:09,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:59:09,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 12:59:09,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 12:59:09,451 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) [2022-07-13 12:59:09,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 12:59:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:59:09,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 12:59:09,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 12:59:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-13 12:59:09,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 12:59:09,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131462185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:59:09,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 12:59:09,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-13 12:59:09,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170529952] [2022-07-13 12:59:09,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:59:09,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:59:09,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:59:09,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:59:09,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-13 12:59:09,875 INFO L87 Difference]: Start difference. First operand 127188 states and 141693 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:13,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:59:13,205 INFO L93 Difference]: Finished difference Result 253586 states and 282592 transitions. [2022-07-13 12:59:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:59:13,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 338 [2022-07-13 12:59:13,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:59:13,462 INFO L225 Difference]: With dead ends: 253586 [2022-07-13 12:59:13,462 INFO L226 Difference]: Without dead ends: 127187 [2022-07-13 12:59:13,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-13 12:59:13,558 INFO L413 NwaCegarLoop]: 1342 mSDtfsCounter, 1113 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2462 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 2462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-13 12:59:13,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 1421 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 2462 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-13 12:59:13,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127187 states. [2022-07-13 12:59:14,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127187 to 127185. [2022-07-13 12:59:14,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127185 states, 127184 states have (on average 1.085451000125802) internal successors, (138052), 127184 states have internal predecessors, (138052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:14,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127185 states to 127185 states and 138052 transitions. [2022-07-13 12:59:14,998 INFO L78 Accepts]: Start accepts. Automaton has 127185 states and 138052 transitions. Word has length 338 [2022-07-13 12:59:14,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:59:14,999 INFO L495 AbstractCegarLoop]: Abstraction has 127185 states and 138052 transitions. [2022-07-13 12:59:14,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:14,999 INFO L276 IsEmpty]: Start isEmpty. Operand 127185 states and 138052 transitions. [2022-07-13 12:59:15,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2022-07-13 12:59:15,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:59:15,006 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 12:59:15,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 12:59:15,219 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,SelfDestructingSolverStorable11 [2022-07-13 12:59:15,220 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:59:15,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:59:15,220 INFO L85 PathProgramCache]: Analyzing trace with hash 826877036, now seen corresponding path program 1 times [2022-07-13 12:59:15,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:59:15,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591766868] [2022-07-13 12:59:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:59:15,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:59:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:59:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-13 12:59:15,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:59:15,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591766868] [2022-07-13 12:59:15,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591766868] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:59:15,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:59:15,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:59:15,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20980517] [2022-07-13 12:59:15,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:59:15,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:59:15,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:59:15,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:59:15,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:59:15,610 INFO L87 Difference]: Start difference. First operand 127185 states and 138052 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:19,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:59:19,236 INFO L93 Difference]: Finished difference Result 292945 states and 320174 transitions. [2022-07-13 12:59:19,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:59:19,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 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 406 [2022-07-13 12:59:19,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:59:19,434 INFO L225 Difference]: With dead ends: 292945 [2022-07-13 12:59:19,435 INFO L226 Difference]: Without dead ends: 164188 [2022-07-13 12:59:19,655 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 [2022-07-13 12:59:19,679 INFO L413 NwaCegarLoop]: 1750 mSDtfsCounter, 785 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2530 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 3244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 2530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-13 12:59:19,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 1894 Invalid, 3244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 2530 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-13 12:59:19,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164188 states. [2022-07-13 12:59:21,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164188 to 161023. [2022-07-13 12:59:21,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161023 states, 161022 states have (on average 1.0724310963719244) internal successors, (172685), 161022 states have internal predecessors, (172685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:21,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161023 states to 161023 states and 172685 transitions. [2022-07-13 12:59:21,626 INFO L78 Accepts]: Start accepts. Automaton has 161023 states and 172685 transitions. Word has length 406 [2022-07-13 12:59:21,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:59:21,627 INFO L495 AbstractCegarLoop]: Abstraction has 161023 states and 172685 transitions. [2022-07-13 12:59:21,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:21,627 INFO L276 IsEmpty]: Start isEmpty. Operand 161023 states and 172685 transitions. [2022-07-13 12:59:21,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-07-13 12:59:21,634 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:59:21,634 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:59:21,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 12:59:21,635 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:59:21,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:59:21,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2077582457, now seen corresponding path program 1 times [2022-07-13 12:59:21,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:59:21,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901082334] [2022-07-13 12:59:21,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:59:21,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:59:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:59:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 260 proven. 110 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 12:59:21,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:59:21,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901082334] [2022-07-13 12:59:21,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901082334] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 12:59:21,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010457403] [2022-07-13 12:59:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:59:21,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 12:59:21,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 12:59:21,811 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) [2022-07-13 12:59:21,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 12:59:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:59:21,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 12:59:21,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 12:59:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-07-13 12:59:21,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 12:59:21,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010457403] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:59:21,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 12:59:21,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-07-13 12:59:21,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787329740] [2022-07-13 12:59:21,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:59:21,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:59:21,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:59:21,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:59:21,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-13 12:59:21,948 INFO L87 Difference]: Start difference. First operand 161023 states and 172685 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:25,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:59:25,474 INFO L93 Difference]: Finished difference Result 354320 states and 382192 transitions. [2022-07-13 12:59:25,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:59:25,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 428 [2022-07-13 12:59:25,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:59:25,748 INFO L225 Difference]: With dead ends: 354320 [2022-07-13 12:59:25,749 INFO L226 Difference]: Without dead ends: 194086 [2022-07-13 12:59:25,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-13 12:59:25,831 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 1023 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 998 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 3365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 998 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-13 12:59:25,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 734 Invalid, 3365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [998 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-13 12:59:26,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194086 states. [2022-07-13 12:59:27,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194086 to 191704. [2022-07-13 12:59:27,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191704 states, 191703 states have (on average 1.0757630292692342) internal successors, (206227), 191703 states have internal predecessors, (206227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:28,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191704 states to 191704 states and 206227 transitions. [2022-07-13 12:59:28,487 INFO L78 Accepts]: Start accepts. Automaton has 191704 states and 206227 transitions. Word has length 428 [2022-07-13 12:59:28,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:59:28,512 INFO L495 AbstractCegarLoop]: Abstraction has 191704 states and 206227 transitions. [2022-07-13 12:59:28,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:28,512 INFO L276 IsEmpty]: Start isEmpty. Operand 191704 states and 206227 transitions. [2022-07-13 12:59:28,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2022-07-13 12:59:28,539 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:59:28,539 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 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] [2022-07-13 12:59:28,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 12:59:28,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 12:59:28,756 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:59:28,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:59:28,757 INFO L85 PathProgramCache]: Analyzing trace with hash -851661849, now seen corresponding path program 1 times [2022-07-13 12:59:28,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:59:28,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722460803] [2022-07-13 12:59:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:59:28,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:59:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:59:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 967 backedges. 768 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2022-07-13 12:59:28,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:59:28,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722460803] [2022-07-13 12:59:28,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722460803] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:59:28,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:59:28,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:59:28,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881780761] [2022-07-13 12:59:28,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:59:28,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:59:28,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:59:28,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:59:28,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:59:28,898 INFO L87 Difference]: Start difference. First operand 191704 states and 206227 transitions. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:32,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:59:32,267 INFO L93 Difference]: Finished difference Result 384202 states and 413257 transitions. [2022-07-13 12:59:32,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:59:32,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 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 525 [2022-07-13 12:59:32,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:59:32,528 INFO L225 Difference]: With dead ends: 384202 [2022-07-13 12:59:32,528 INFO L226 Difference]: Without dead ends: 193287 [2022-07-13 12:59:32,935 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 [2022-07-13 12:59:32,936 INFO L413 NwaCegarLoop]: 1397 mSDtfsCounter, 934 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 3066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-13 12:59:32,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 1482 Invalid, 3066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-13 12:59:33,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193287 states. [2022-07-13 12:59:34,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193287 to 191697. [2022-07-13 12:59:35,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191697 states, 191696 states have (on average 1.0583371588348218) internal successors, (202879), 191696 states have internal predecessors, (202879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191697 states to 191697 states and 202879 transitions. [2022-07-13 12:59:35,312 INFO L78 Accepts]: Start accepts. Automaton has 191697 states and 202879 transitions. Word has length 525 [2022-07-13 12:59:35,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:59:35,313 INFO L495 AbstractCegarLoop]: Abstraction has 191697 states and 202879 transitions. [2022-07-13 12:59:35,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:35,313 INFO L276 IsEmpty]: Start isEmpty. Operand 191697 states and 202879 transitions. [2022-07-13 12:59:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2022-07-13 12:59:35,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:59:35,335 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 12:59:35,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 12:59:35,336 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:59:35,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:59:35,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1699556428, now seen corresponding path program 1 times [2022-07-13 12:59:35,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:59:35,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498310868] [2022-07-13 12:59:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:59:35,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:59:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:59:35,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 460 proven. 0 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2022-07-13 12:59:35,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:59:35,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498310868] [2022-07-13 12:59:35,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498310868] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:59:35,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:59:35,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 12:59:35,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522429124] [2022-07-13 12:59:35,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:59:35,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 12:59:35,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:59:35,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 12:59:35,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 12:59:35,598 INFO L87 Difference]: Start difference. First operand 191697 states and 202879 transitions. Second operand has 5 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:59:40,009 INFO L93 Difference]: Finished difference Result 374710 states and 397517 transitions. [2022-07-13 12:59:40,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 12:59:40,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 0 states have call successors, (0), 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 566 [2022-07-13 12:59:40,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:59:40,304 INFO L225 Difference]: With dead ends: 374710 [2022-07-13 12:59:40,305 INFO L226 Difference]: Without dead ends: 201909 [2022-07-13 12:59:40,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 12:59:40,386 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 2502 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 3081 mSolverCounterSat, 1433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2502 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 4514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1433 IncrementalHoareTripleChecker+Valid, 3081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-13 12:59:40,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2502 Valid, 373 Invalid, 4514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1433 Valid, 3081 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-13 12:59:40,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201909 states. [2022-07-13 12:59:42,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201909 to 201894. [2022-07-13 12:59:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201894 states, 201893 states have (on average 1.0549647585602275) internal successors, (212990), 201893 states have internal predecessors, (212990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:42,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201894 states to 201894 states and 212990 transitions. [2022-07-13 12:59:42,966 INFO L78 Accepts]: Start accepts. Automaton has 201894 states and 212990 transitions. Word has length 566 [2022-07-13 12:59:42,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:59:42,967 INFO L495 AbstractCegarLoop]: Abstraction has 201894 states and 212990 transitions. [2022-07-13 12:59:42,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 201894 states and 212990 transitions. [2022-07-13 12:59:42,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2022-07-13 12:59:42,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:59:42,990 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 12:59:42,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 12:59:42,991 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:59:42,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:59:42,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1604066583, now seen corresponding path program 1 times [2022-07-13 12:59:42,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:59:42,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827581688] [2022-07-13 12:59:42,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:59:42,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:59:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:59:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 526 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-13 12:59:43,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:59:43,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827581688] [2022-07-13 12:59:43,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827581688] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:59:43,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:59:43,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 12:59:43,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696536021] [2022-07-13 12:59:43,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:59:43,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:59:43,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:59:43,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:59:43,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:59:43,142 INFO L87 Difference]: Start difference. First operand 201894 states and 212990 transitions. Second operand has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:59:49,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:59:49,997 INFO L93 Difference]: Finished difference Result 515744 states and 544805 transitions. [2022-07-13 12:59:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:59:49,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 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 616 [2022-07-13 12:59:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:59:50,441 INFO L225 Difference]: With dead ends: 515744 [2022-07-13 12:59:50,441 INFO L226 Difference]: Without dead ends: 314639 [2022-07-13 12:59:50,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:59:50,545 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 1709 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 6316 mSolverCounterSat, 1101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 7417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1101 IncrementalHoareTripleChecker+Valid, 6316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-07-13 12:59:50,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1709 Valid, 909 Invalid, 7417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1101 Valid, 6316 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-07-13 12:59:50,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314639 states.