./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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_label10.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 70e3fa314440413ee6566d40ce0ee11aff48ac01f98d0bf277ed2b1e7bf71005 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 12:31:24,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 12:31:24,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 12:31:24,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 12:31:24,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 12:31:24,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 12:31:24,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 12:31:24,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 12:31:24,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 12:31:24,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 12:31:24,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 12:31:24,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 12:31:24,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 12:31:24,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 12:31:24,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 12:31:24,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 12:31:24,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 12:31:24,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 12:31:24,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 12:31:24,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 12:31:24,688 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 12:31:24,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 12:31:24,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 12:31:24,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 12:31:24,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 12:31:24,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 12:31:24,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 12:31:24,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 12:31:24,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 12:31:24,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 12:31:24,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 12:31:24,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 12:31:24,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 12:31:24,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 12:31:24,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 12:31:24,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 12:31:24,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 12:31:24,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 12:31:24,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 12:31:24,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 12:31:24,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 12:31:24,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 12:31:24,703 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 12:31:24,727 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 12:31:24,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 12:31:24,727 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 12:31:24,727 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 12:31:24,728 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 12:31:24,728 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 12:31:24,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 12:31:24,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 12:31:24,729 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 12:31:24,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 12:31:24,730 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 12:31:24,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 12:31:24,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 12:31:24,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 12:31:24,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 12:31:24,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 12:31:24,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 12:31:24,731 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 12:31:24,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 12:31:24,732 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 12:31:24,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 12:31:24,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 12:31:24,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 12:31:24,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 12:31:24,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:31:24,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 12:31:24,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 12:31:24,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 12:31:24,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 12:31:24,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 12:31:24,734 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 12:31:24,734 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 12:31:24,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 12:31:24,734 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 70e3fa314440413ee6566d40ce0ee11aff48ac01f98d0bf277ed2b1e7bf71005 [2022-07-22 12:31:24,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 12:31:24,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 12:31:24,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 12:31:24,913 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 12:31:24,914 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 12:31:24,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label10.c [2022-07-22 12:31:24,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f9933774/3026cbe49ac4487ca7e865b1d2b857a5/FLAG58ab25c8d [2022-07-22 12:31:25,545 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 12:31:25,545 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label10.c [2022-07-22 12:31:25,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f9933774/3026cbe49ac4487ca7e865b1d2b857a5/FLAG58ab25c8d [2022-07-22 12:31:25,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f9933774/3026cbe49ac4487ca7e865b1d2b857a5 [2022-07-22 12:31:25,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 12:31:25,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 12:31:25,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 12:31:25,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 12:31:25,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 12:31:25,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:31:25" (1/1) ... [2022-07-22 12:31:25,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d8efc3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:31:25, skipping insertion in model container [2022-07-22 12:31:25,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:31:25" (1/1) ... [2022-07-22 12:31:25,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 12:31:25,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 12:31:26,162 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_label10.c[6726,6739] [2022-07-22 12:31:26,767 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:31:26,772 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 12:31:26,798 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_label10.c[6726,6739] [2022-07-22 12:31:27,143 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:31:27,160 INFO L208 MainTranslator]: Completed translation [2022-07-22 12:31:27,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:31:27 WrapperNode [2022-07-22 12:31:27,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 12:31:27,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 12:31:27,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 12:31:27,161 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 12:31:27,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:31:27" (1/1) ... [2022-07-22 12:31:27,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:31:27" (1/1) ... [2022-07-22 12:31:27,653 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-22 12:31:27,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 12:31:27,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 12:31:27,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 12:31:27,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 12:31:27,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:31:27" (1/1) ... [2022-07-22 12:31:27,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:31:27" (1/1) ... [2022-07-22 12:31:27,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:31:27" (1/1) ... [2022-07-22 12:31:27,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:31:27" (1/1) ... [2022-07-22 12:31:28,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:31:27" (1/1) ... [2022-07-22 12:31:28,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:31:27" (1/1) ... [2022-07-22 12:31:28,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:31:27" (1/1) ... [2022-07-22 12:31:28,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 12:31:28,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 12:31:28,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 12:31:28,163 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 12:31:28,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:31:27" (1/1) ... [2022-07-22 12:31:28,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:31:28,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:31:28,188 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) [2022-07-22 12:31:28,205 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 [2022-07-22 12:31:28,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 12:31:28,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 12:31:28,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 12:31:28,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 12:31:28,271 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 12:31:28,272 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 12:31:31,638 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 12:31:31,650 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 12:31:31,650 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 12:31:31,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:31:31 BoogieIcfgContainer [2022-07-22 12:31:31,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 12:31:31,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 12:31:31,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 12:31:31,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 12:31:31,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:31:25" (1/3) ... [2022-07-22 12:31:31,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3274e947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:31:31, skipping insertion in model container [2022-07-22 12:31:31,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:31:27" (2/3) ... [2022-07-22 12:31:31,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3274e947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:31:31, skipping insertion in model container [2022-07-22 12:31:31,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:31:31" (3/3) ... [2022-07-22 12:31:31,663 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label10.c [2022-07-22 12:31:31,673 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 12:31:31,673 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 12:31:31,731 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 12:31:31,737 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@a07e487, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@796f3a5d [2022-07-22 12:31:31,737 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 12:31:31,748 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) [2022-07-22 12:31:31,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 12:31:31,755 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:31:31,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:31:31,756 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:31:31,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:31:31,761 INFO L85 PathProgramCache]: Analyzing trace with hash 433832817, now seen corresponding path program 1 times [2022-07-22 12:31:31,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:31:31,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369043740] [2022-07-22 12:31:31,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:31:31,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:31:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:31:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:31:31,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:31:31,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369043740] [2022-07-22 12:31:31,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369043740] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:31:31,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:31:31,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:31:31,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775089254] [2022-07-22 12:31:31,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:31:31,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:31:31,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:31:31,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:31:31,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:31:31,993 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 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:31:35,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:31:35,255 INFO L93 Difference]: Finished difference Result 3035 states and 5643 transitions. [2022-07-22 12:31:35,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:31:35,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2022-07-22 12:31:35,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:31:35,281 INFO L225 Difference]: With dead ends: 3035 [2022-07-22 12:31:35,281 INFO L226 Difference]: Without dead ends: 1873 [2022-07-22 12:31:35,288 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 [2022-07-22 12:31:35,290 INFO L413 NwaCegarLoop]: 991 mSDtfsCounter, 858 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:31:35,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 1145 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [858 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-22 12:31:35,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2022-07-22 12:31:35,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1859. [2022-07-22 12:31:35,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 1.5441334768568353) internal successors, (2869), 1858 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:31:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2869 transitions. [2022-07-22 12:31:35,376 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2869 transitions. Word has length 47 [2022-07-22 12:31:35,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:31:35,376 INFO L495 AbstractCegarLoop]: Abstraction has 1859 states and 2869 transitions. [2022-07-22 12:31:35,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:31:35,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2869 transitions. [2022-07-22 12:31:35,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-22 12:31:35,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:31:35,384 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:31:35,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 12:31:35,385 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:31:35,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:31:35,385 INFO L85 PathProgramCache]: Analyzing trace with hash 494461477, now seen corresponding path program 1 times [2022-07-22 12:31:35,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:31:35,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646798562] [2022-07-22 12:31:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:31:35,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:31:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:31:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:31:35,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:31:35,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646798562] [2022-07-22 12:31:35,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646798562] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:31:35,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:31:35,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:31:35,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942440454] [2022-07-22 12:31:35,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:31:35,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:31:35,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:31:35,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:31:35,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:31:35,501 INFO L87 Difference]: Start difference. First operand 1859 states and 2869 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:31:38,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:31:38,505 INFO L93 Difference]: Finished difference Result 5317 states and 8229 transitions. [2022-07-22 12:31:38,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:31:38,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-07-22 12:31:38,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:31:38,518 INFO L225 Difference]: With dead ends: 5317 [2022-07-22 12:31:38,518 INFO L226 Difference]: Without dead ends: 3460 [2022-07-22 12:31:38,523 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 [2022-07-22 12:31:38,524 INFO L413 NwaCegarLoop]: 1039 mSDtfsCounter, 826 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 3279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:31:38,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 1192 Invalid, 3279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 2402 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-22 12:31:38,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2022-07-22 12:31:38,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3459. [2022-07-22 12:31:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 1.3805668016194332) internal successors, (4774), 3458 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:31:38,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 4774 transitions. [2022-07-22 12:31:38,570 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 4774 transitions. Word has length 119 [2022-07-22 12:31:38,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:31:38,573 INFO L495 AbstractCegarLoop]: Abstraction has 3459 states and 4774 transitions. [2022-07-22 12:31:38,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:31:38,573 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 4774 transitions. [2022-07-22 12:31:38,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-22 12:31:38,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:31:38,580 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:31:38,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 12:31:38,582 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:31:38,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:31:38,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1890693106, now seen corresponding path program 1 times [2022-07-22 12:31:38,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:31:38,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120141689] [2022-07-22 12:31:38,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:31:38,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:31:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:31:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:31:38,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:31:38,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120141689] [2022-07-22 12:31:38,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120141689] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:31:38,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:31:38,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:31:38,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595832961] [2022-07-22 12:31:38,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:31:38,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:31:38,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:31:38,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:31:38,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:31:38,713 INFO L87 Difference]: Start difference. First operand 3459 states and 4774 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:31:42,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:31:42,907 INFO L93 Difference]: Finished difference Result 10870 states and 14768 transitions. [2022-07-22 12:31:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:31:42,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2022-07-22 12:31:42,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:31:42,925 INFO L225 Difference]: With dead ends: 10870 [2022-07-22 12:31:42,925 INFO L226 Difference]: Without dead ends: 7413 [2022-07-22 12:31:42,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:31:42,929 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 2579 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 4117 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2579 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 4951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 4117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:31:42,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2579 Valid, 1003 Invalid, 4951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 4117 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-07-22 12:31:42,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7413 states. [2022-07-22 12:31:43,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7413 to 7412. [2022-07-22 12:31:43,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7411 states have (on average 1.2698691134799622) internal successors, (9411), 7411 states have internal predecessors, (9411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:31:43,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 9411 transitions. [2022-07-22 12:31:43,032 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 9411 transitions. Word has length 133 [2022-07-22 12:31:43,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:31:43,033 INFO L495 AbstractCegarLoop]: Abstraction has 7412 states and 9411 transitions. [2022-07-22 12:31:43,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:31:43,034 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 9411 transitions. [2022-07-22 12:31:43,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-07-22 12:31:43,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:31:43,036 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-07-22 12:31:43,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 12:31:43,037 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:31:43,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:31:43,037 INFO L85 PathProgramCache]: Analyzing trace with hash 154744987, now seen corresponding path program 1 times [2022-07-22 12:31:43,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:31:43,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393458846] [2022-07-22 12:31:43,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:31:43,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:31:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:31:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-22 12:31:43,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:31:43,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393458846] [2022-07-22 12:31:43,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393458846] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:31:43,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:31:43,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:31:43,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806447495] [2022-07-22 12:31:43,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:31:43,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:31:43,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:31:43,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:31:43,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:31:43,186 INFO L87 Difference]: Start difference. First operand 7412 states and 9411 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:31:46,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:31:46,134 INFO L93 Difference]: Finished difference Result 20355 states and 26251 transitions. [2022-07-22 12:31:46,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:31:46,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2022-07-22 12:31:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:31:46,166 INFO L225 Difference]: With dead ends: 20355 [2022-07-22 12:31:46,166 INFO L226 Difference]: Without dead ends: 13732 [2022-07-22 12:31:46,175 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 [2022-07-22 12:31:46,182 INFO L413 NwaCegarLoop]: 850 mSDtfsCounter, 888 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:31:46,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 978 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 2575 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-22 12:31:46,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13732 states. [2022-07-22 12:31:46,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13732 to 12937. [2022-07-22 12:31:46,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12937 states, 12936 states have (on average 1.215213358070501) internal successors, (15720), 12936 states have internal predecessors, (15720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:31:46,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12937 states to 12937 states and 15720 transitions. [2022-07-22 12:31:46,413 INFO L78 Accepts]: Start accepts. Automaton has 12937 states and 15720 transitions. Word has length 214 [2022-07-22 12:31:46,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:31:46,414 INFO L495 AbstractCegarLoop]: Abstraction has 12937 states and 15720 transitions. [2022-07-22 12:31:46,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:31:46,415 INFO L276 IsEmpty]: Start isEmpty. Operand 12937 states and 15720 transitions. [2022-07-22 12:31:46,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-07-22 12:31:46,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:31:46,417 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:31:46,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 12:31:46,418 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:31:46,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:31:46,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1296879125, now seen corresponding path program 1 times [2022-07-22 12:31:46,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:31:46,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331061771] [2022-07-22 12:31:46,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:31:46,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:31:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:31:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:31:46,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:31:46,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331061771] [2022-07-22 12:31:46,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331061771] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:31:46,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:31:46,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:31:46,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988873055] [2022-07-22 12:31:46,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:31:46,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:31:46,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:31:46,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:31:46,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:31:46,538 INFO L87 Difference]: Start difference. First operand 12937 states and 15720 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:31:49,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:31:49,239 INFO L93 Difference]: Finished difference Result 31392 states and 39119 transitions. [2022-07-22 12:31:49,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:31:49,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 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 246 [2022-07-22 12:31:49,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:31:49,268 INFO L225 Difference]: With dead ends: 31392 [2022-07-22 12:31:49,269 INFO L226 Difference]: Without dead ends: 19244 [2022-07-22 12:31:49,281 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 [2022-07-22 12:31:49,282 INFO L413 NwaCegarLoop]: 809 mSDtfsCounter, 858 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:31:49,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 926 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 12:31:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19244 states. [2022-07-22 12:31:49,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19244 to 18447. [2022-07-22 12:31:49,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18447 states, 18446 states have (on average 1.2024287108316165) internal successors, (22180), 18446 states have internal predecessors, (22180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:31:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18447 states to 18447 states and 22180 transitions. [2022-07-22 12:31:49,482 INFO L78 Accepts]: Start accepts. Automaton has 18447 states and 22180 transitions. Word has length 246 [2022-07-22 12:31:49,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:31:49,484 INFO L495 AbstractCegarLoop]: Abstraction has 18447 states and 22180 transitions. [2022-07-22 12:31:49,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:31:49,486 INFO L276 IsEmpty]: Start isEmpty. Operand 18447 states and 22180 transitions. [2022-07-22 12:31:49,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-07-22 12:31:49,491 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:31:49,491 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 12:31:49,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 12:31:49,492 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:31:49,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:31:49,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1687890830, now seen corresponding path program 1 times [2022-07-22 12:31:49,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:31:49,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463556702] [2022-07-22 12:31:49,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:31:49,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:31:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:31:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-22 12:31:49,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:31:49,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463556702] [2022-07-22 12:31:49,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463556702] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:31:49,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:31:49,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:31:49,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502675907] [2022-07-22 12:31:49,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:31:49,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:31:49,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:31:49,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:31:49,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:31:49,690 INFO L87 Difference]: Start difference. First operand 18447 states and 22180 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:31:52,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:31:52,790 INFO L93 Difference]: Finished difference Result 42412 states and 52037 transitions. [2022-07-22 12:31:52,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:31:52,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 335 [2022-07-22 12:31:52,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:31:52,836 INFO L225 Difference]: With dead ends: 42412 [2022-07-22 12:31:52,836 INFO L226 Difference]: Without dead ends: 24754 [2022-07-22 12:31:52,853 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 [2022-07-22 12:31:52,854 INFO L413 NwaCegarLoop]: 1796 mSDtfsCounter, 823 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2542 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 3265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 2542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:31:52,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 1947 Invalid, 3265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 2542 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-22 12:31:52,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24754 states. [2022-07-22 12:31:53,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24754 to 23962. [2022-07-22 12:31:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23962 states, 23961 states have (on average 1.1787070656483452) internal successors, (28243), 23961 states have internal predecessors, (28243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:31:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23962 states to 23962 states and 28243 transitions. [2022-07-22 12:31:53,120 INFO L78 Accepts]: Start accepts. Automaton has 23962 states and 28243 transitions. Word has length 335 [2022-07-22 12:31:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:31:53,120 INFO L495 AbstractCegarLoop]: Abstraction has 23962 states and 28243 transitions. [2022-07-22 12:31:53,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:31:53,121 INFO L276 IsEmpty]: Start isEmpty. Operand 23962 states and 28243 transitions. [2022-07-22 12:31:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-07-22 12:31:53,125 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:31:53,125 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:31:53,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 12:31:53,126 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:31:53,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:31:53,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1979168850, now seen corresponding path program 1 times [2022-07-22 12:31:53,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:31:53,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729658137] [2022-07-22 12:31:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:31:53,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:31:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:31:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 379 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 12:31:53,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:31:53,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729658137] [2022-07-22 12:31:53,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729658137] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:31:53,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:31:53,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:31:53,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351370425] [2022-07-22 12:31:53,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:31:53,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:31:53,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:31:53,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:31:53,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:31:53,247 INFO L87 Difference]: Start difference. First operand 23962 states and 28243 transitions. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:31:58,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:31:58,952 INFO L93 Difference]: Finished difference Result 89064 states and 105284 transitions. [2022-07-22 12:31:58,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:31:58,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 344 [2022-07-22 12:31:58,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:31:59,029 INFO L225 Difference]: With dead ends: 89064 [2022-07-22 12:31:59,029 INFO L226 Difference]: Without dead ends: 65891 [2022-07-22 12:31:59,063 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 [2022-07-22 12:31:59,064 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 1745 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 6025 mSolverCounterSat, 1214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1745 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 7239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1214 IncrementalHoareTripleChecker+Valid, 6025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:31:59,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1745 Valid, 638 Invalid, 7239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1214 Valid, 6025 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-07-22 12:31:59,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65891 states. [2022-07-22 12:31:59,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65891 to 64976. [2022-07-22 12:31:59,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64976 states, 64975 states have (on average 1.154567141208157) internal successors, (75018), 64975 states have internal predecessors, (75018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:00,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64976 states to 64976 states and 75018 transitions. [2022-07-22 12:32:00,008 INFO L78 Accepts]: Start accepts. Automaton has 64976 states and 75018 transitions. Word has length 344 [2022-07-22 12:32:00,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:32:00,009 INFO L495 AbstractCegarLoop]: Abstraction has 64976 states and 75018 transitions. [2022-07-22 12:32:00,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:00,009 INFO L276 IsEmpty]: Start isEmpty. Operand 64976 states and 75018 transitions. [2022-07-22 12:32:00,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-07-22 12:32:00,015 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:32:00,015 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 12:32:00,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 12:32:00,015 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:32:00,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:32:00,016 INFO L85 PathProgramCache]: Analyzing trace with hash -481772957, now seen corresponding path program 1 times [2022-07-22 12:32:00,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:32:00,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643596483] [2022-07-22 12:32:00,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:00,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:32:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-07-22 12:32:00,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:32:00,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643596483] [2022-07-22 12:32:00,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643596483] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:32:00,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:32:00,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:32:00,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17522604] [2022-07-22 12:32:00,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:32:00,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:32:00,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:32:00,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:32:00,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:32:00,122 INFO L87 Difference]: Start difference. First operand 64976 states and 75018 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) [2022-07-22 12:32:03,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:32:03,341 INFO L93 Difference]: Finished difference Result 142564 states and 164034 transitions. [2022-07-22 12:32:03,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:32:03,341 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 344 [2022-07-22 12:32:03,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:32:03,472 INFO L225 Difference]: With dead ends: 142564 [2022-07-22 12:32:03,472 INFO L226 Difference]: Without dead ends: 78377 [2022-07-22 12:32:03,511 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 [2022-07-22 12:32:03,512 INFO L413 NwaCegarLoop]: 1018 mSDtfsCounter, 728 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 2704 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 2885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:32:03,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1198 Invalid, 2885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2704 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 12:32:03,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78377 states. [2022-07-22 12:32:04,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78377 to 77581. [2022-07-22 12:32:04,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77581 states, 77580 states have (on average 1.1385924207269915) internal successors, (88332), 77580 states have internal predecessors, (88332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:04,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77581 states to 77581 states and 88332 transitions. [2022-07-22 12:32:04,506 INFO L78 Accepts]: Start accepts. Automaton has 77581 states and 88332 transitions. Word has length 344 [2022-07-22 12:32:04,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:32:04,506 INFO L495 AbstractCegarLoop]: Abstraction has 77581 states and 88332 transitions. [2022-07-22 12:32:04,506 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) [2022-07-22 12:32:04,507 INFO L276 IsEmpty]: Start isEmpty. Operand 77581 states and 88332 transitions. [2022-07-22 12:32:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2022-07-22 12:32:04,539 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:32:04,539 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 12:32:04,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 12:32:04,540 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:32:04,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:32:04,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1384889835, now seen corresponding path program 1 times [2022-07-22 12:32:04,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:32:04,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865456835] [2022-07-22 12:32:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:04,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:32:04,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 258 proven. 113 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 12:32:04,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:32:04,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865456835] [2022-07-22 12:32:04,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865456835] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:32:04,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576554111] [2022-07-22 12:32:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:04,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:32:04,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:32:04,859 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) [2022-07-22 12:32:04,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 12:32:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:04,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:32:04,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:32:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-07-22 12:32:05,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:32:05,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576554111] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:32:05,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:32:05,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-22 12:32:05,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950298131] [2022-07-22 12:32:05,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:32:05,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:32:05,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:32:05,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:32:05,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:32:05,151 INFO L87 Difference]: Start difference. First operand 77581 states and 88332 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) [2022-07-22 12:32:08,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:32:08,169 INFO L93 Difference]: Finished difference Result 154371 states and 175869 transitions. [2022-07-22 12:32:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:32:08,170 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 373 [2022-07-22 12:32:08,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:32:08,259 INFO L225 Difference]: With dead ends: 154371 [2022-07-22 12:32:08,259 INFO L226 Difference]: Without dead ends: 77579 [2022-07-22 12:32:08,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:32:08,289 INFO L413 NwaCegarLoop]: 1362 mSDtfsCounter, 1122 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1443 SdHoareTripleChecker+Invalid, 2916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:32:08,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1122 Valid, 1443 Invalid, 2916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 2466 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 12:32:08,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77579 states. [2022-07-22 12:32:08,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77579 to 76791. [2022-07-22 12:32:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76791 states, 76790 states have (on average 1.1075400442765986) internal successors, (85048), 76790 states have internal predecessors, (85048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:09,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76791 states to 76791 states and 85048 transitions. [2022-07-22 12:32:09,127 INFO L78 Accepts]: Start accepts. Automaton has 76791 states and 85048 transitions. Word has length 373 [2022-07-22 12:32:09,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:32:09,127 INFO L495 AbstractCegarLoop]: Abstraction has 76791 states and 85048 transitions. [2022-07-22 12:32:09,128 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) [2022-07-22 12:32:09,128 INFO L276 IsEmpty]: Start isEmpty. Operand 76791 states and 85048 transitions. [2022-07-22 12:32:09,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-07-22 12:32:09,133 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:32:09,134 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:32:09,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 12:32:09,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:32:09,343 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:32:09,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:32:09,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1355556298, now seen corresponding path program 1 times [2022-07-22 12:32:09,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:32:09,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541865853] [2022-07-22 12:32:09,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:09,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:32:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 508 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-07-22 12:32:09,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:32:09,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541865853] [2022-07-22 12:32:09,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541865853] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:32:09,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:32:09,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:32:09,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438766160] [2022-07-22 12:32:09,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:32:09,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:32:09,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:32:09,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:32:09,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:32:09,461 INFO L87 Difference]: Start difference. First operand 76791 states and 85048 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:12,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:32:12,992 INFO L93 Difference]: Finished difference Result 171691 states and 192206 transitions. [2022-07-22 12:32:12,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:32:12,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 403 [2022-07-22 12:32:12,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:32:13,124 INFO L225 Difference]: With dead ends: 171691 [2022-07-22 12:32:13,124 INFO L226 Difference]: Without dead ends: 95689 [2022-07-22 12:32:13,173 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 [2022-07-22 12:32:13,173 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 905 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2415 mSolverCounterSat, 944 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 3359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 944 IncrementalHoareTripleChecker+Valid, 2415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-22 12:32:13,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 907 Invalid, 3359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [944 Valid, 2415 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-22 12:32:13,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95689 states. [2022-07-22 12:32:14,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95689 to 95671. [2022-07-22 12:32:14,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95671 states, 95670 states have (on average 1.1136301871014946) internal successors, (106541), 95670 states have internal predecessors, (106541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:14,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95671 states to 95671 states and 106541 transitions. [2022-07-22 12:32:14,367 INFO L78 Accepts]: Start accepts. Automaton has 95671 states and 106541 transitions. Word has length 403 [2022-07-22 12:32:14,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:32:14,368 INFO L495 AbstractCegarLoop]: Abstraction has 95671 states and 106541 transitions. [2022-07-22 12:32:14,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:14,368 INFO L276 IsEmpty]: Start isEmpty. Operand 95671 states and 106541 transitions. [2022-07-22 12:32:14,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2022-07-22 12:32:14,382 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:32:14,382 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:32:14,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 12:32:14,383 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:32:14,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:32:14,383 INFO L85 PathProgramCache]: Analyzing trace with hash -748426392, now seen corresponding path program 1 times [2022-07-22 12:32:14,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:32:14,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311092963] [2022-07-22 12:32:14,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:14,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:32:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 298 proven. 110 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 12:32:14,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:32:14,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311092963] [2022-07-22 12:32:14,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311092963] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:32:14,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658767783] [2022-07-22 12:32:14,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:14,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:32:14,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:32:14,596 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) [2022-07-22 12:32:14,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 12:32:14,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:14,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:32:14,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:32:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-22 12:32:15,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:32:15,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658767783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:32:15,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:32:15,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-07-22 12:32:15,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642260540] [2022-07-22 12:32:15,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:32:15,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:32:15,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:32:15,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:32:15,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:32:15,531 INFO L87 Difference]: Start difference. First operand 95671 states and 106541 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 2 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:18,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:32:18,281 INFO L93 Difference]: Finished difference Result 179539 states and 200862 transitions. [2022-07-22 12:32:18,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:32:18,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 2 states have internal predecessors, (269), 0 states have call successors, (0), 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 436 [2022-07-22 12:32:18,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:32:18,402 INFO L225 Difference]: With dead ends: 179539 [2022-07-22 12:32:18,402 INFO L226 Difference]: Without dead ends: 98832 [2022-07-22 12:32:18,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:32:18,450 INFO L413 NwaCegarLoop]: 1049 mSDtfsCounter, 643 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 2476 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 2589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:32:18,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 1184 Invalid, 2589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2476 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 12:32:18,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98832 states. [2022-07-22 12:32:19,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98832 to 98823. [2022-07-22 12:32:19,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98823 states, 98822 states have (on average 1.1113213656878023) internal successors, (109823), 98822 states have internal predecessors, (109823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:19,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98823 states to 98823 states and 109823 transitions. [2022-07-22 12:32:19,586 INFO L78 Accepts]: Start accepts. Automaton has 98823 states and 109823 transitions. Word has length 436 [2022-07-22 12:32:19,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:32:19,587 INFO L495 AbstractCegarLoop]: Abstraction has 98823 states and 109823 transitions. [2022-07-22 12:32:19,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 2 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:19,587 INFO L276 IsEmpty]: Start isEmpty. Operand 98823 states and 109823 transitions. [2022-07-22 12:32:19,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-07-22 12:32:19,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:32:19,593 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-22 12:32:19,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 12:32:19,799 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,SelfDestructingSolverStorable10 [2022-07-22 12:32:19,799 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:32:19,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:32:19,800 INFO L85 PathProgramCache]: Analyzing trace with hash -593722075, now seen corresponding path program 1 times [2022-07-22 12:32:19,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:32:19,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418573963] [2022-07-22 12:32:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:19,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:32:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 406 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-22 12:32:20,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:32:20,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418573963] [2022-07-22 12:32:20,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418573963] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:32:20,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:32:20,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:32:20,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078863392] [2022-07-22 12:32:20,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:32:20,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:32:20,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:32:20,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:32:20,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:32:20,130 INFO L87 Difference]: Start difference. First operand 98823 states and 109823 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:32:23,652 INFO L93 Difference]: Finished difference Result 196866 states and 218873 transitions. [2022-07-22 12:32:23,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:32:23,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 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 441 [2022-07-22 12:32:23,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:32:23,782 INFO L225 Difference]: With dead ends: 196866 [2022-07-22 12:32:23,782 INFO L226 Difference]: Without dead ends: 98832 [2022-07-22 12:32:23,844 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 [2022-07-22 12:32:23,844 INFO L413 NwaCegarLoop]: 1740 mSDtfsCounter, 793 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 3197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 677 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:32:23,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 1891 Invalid, 3197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [677 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-22 12:32:23,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98832 states. [2022-07-22 12:32:24,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98832 to 96452. [2022-07-22 12:32:24,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96452 states, 96451 states have (on average 1.08021689769935) internal successors, (104188), 96451 states have internal predecessors, (104188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:24,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96452 states to 96452 states and 104188 transitions. [2022-07-22 12:32:24,936 INFO L78 Accepts]: Start accepts. Automaton has 96452 states and 104188 transitions. Word has length 441 [2022-07-22 12:32:24,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:32:24,936 INFO L495 AbstractCegarLoop]: Abstraction has 96452 states and 104188 transitions. [2022-07-22 12:32:24,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:24,936 INFO L276 IsEmpty]: Start isEmpty. Operand 96452 states and 104188 transitions. [2022-07-22 12:32:24,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-07-22 12:32:24,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:32:24,942 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:32:24,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 12:32:24,943 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:32:24,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:32:24,943 INFO L85 PathProgramCache]: Analyzing trace with hash 460083043, now seen corresponding path program 1 times [2022-07-22 12:32:24,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:32:24,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268843584] [2022-07-22 12:32:24,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:24,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:32:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-22 12:32:25,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:32:25,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268843584] [2022-07-22 12:32:25,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268843584] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:32:25,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:32:25,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:32:25,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076511851] [2022-07-22 12:32:25,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:32:25,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:32:25,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:32:25,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:32:25,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:32:25,072 INFO L87 Difference]: Start difference. First operand 96452 states and 104188 transitions. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:29,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:32:29,190 INFO L93 Difference]: Finished difference Result 247354 states and 268072 transitions. [2022-07-22 12:32:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:32:29,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 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 451 [2022-07-22 12:32:29,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:32:29,376 INFO L225 Difference]: With dead ends: 247354 [2022-07-22 12:32:29,376 INFO L226 Difference]: Without dead ends: 151691 [2022-07-22 12:32:29,423 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 [2022-07-22 12:32:29,424 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 977 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 3075 mSolverCounterSat, 669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 3744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 669 IncrementalHoareTripleChecker+Valid, 3075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:32:29,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 579 Invalid, 3744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [669 Valid, 3075 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-22 12:32:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151691 states. [2022-07-22 12:32:30,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151691 to 148442. [2022-07-22 12:32:30,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148442 states, 148441 states have (on average 1.0845453749301068) internal successors, (160991), 148441 states have internal predecessors, (160991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:31,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148442 states to 148442 states and 160991 transitions. [2022-07-22 12:32:31,083 INFO L78 Accepts]: Start accepts. Automaton has 148442 states and 160991 transitions. Word has length 451 [2022-07-22 12:32:31,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:32:31,084 INFO L495 AbstractCegarLoop]: Abstraction has 148442 states and 160991 transitions. [2022-07-22 12:32:31,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:31,084 INFO L276 IsEmpty]: Start isEmpty. Operand 148442 states and 160991 transitions. [2022-07-22 12:32:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2022-07-22 12:32:31,096 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:32:31,097 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-22 12:32:31,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 12:32:31,097 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:32:31,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:32:31,097 INFO L85 PathProgramCache]: Analyzing trace with hash -622702930, now seen corresponding path program 1 times [2022-07-22 12:32:31,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:32:31,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20260159] [2022-07-22 12:32:31,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:31,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:32:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 492 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-22 12:32:31,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:32:31,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20260159] [2022-07-22 12:32:31,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20260159] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:32:31,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:32:31,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:32:31,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977221532] [2022-07-22 12:32:31,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:32:31,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:32:31,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:32:31,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:32:31,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:32:31,521 INFO L87 Difference]: Start difference. First operand 148442 states and 160991 transitions. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:32:34,808 INFO L93 Difference]: Finished difference Result 307876 states and 333174 transitions. [2022-07-22 12:32:34,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:32:34,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 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 538 [2022-07-22 12:32:34,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:32:35,001 INFO L225 Difference]: With dead ends: 307876 [2022-07-22 12:32:35,001 INFO L226 Difference]: Without dead ends: 155499 [2022-07-22 12:32:35,074 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 [2022-07-22 12:32:35,075 INFO L413 NwaCegarLoop]: 1485 mSDtfsCounter, 935 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2349 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 2944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 2349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:32:35,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [935 Valid, 1618 Invalid, 2944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 2349 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 12:32:35,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155499 states. [2022-07-22 12:32:36,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155499 to 148405. [2022-07-22 12:32:36,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148405 states, 148404 states have (on average 1.0549041804803105) internal successors, (156552), 148404 states have internal predecessors, (156552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148405 states to 148405 states and 156552 transitions. [2022-07-22 12:32:37,025 INFO L78 Accepts]: Start accepts. Automaton has 148405 states and 156552 transitions. Word has length 538 [2022-07-22 12:32:37,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:32:37,025 INFO L495 AbstractCegarLoop]: Abstraction has 148405 states and 156552 transitions. [2022-07-22 12:32:37,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:37,026 INFO L276 IsEmpty]: Start isEmpty. Operand 148405 states and 156552 transitions. [2022-07-22 12:32:37,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2022-07-22 12:32:37,037 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:32:37,037 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:32:37,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 12:32:37,037 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:32:37,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:32:37,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1523686472, now seen corresponding path program 1 times [2022-07-22 12:32:37,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:32:37,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940633904] [2022-07-22 12:32:37,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:37,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:32:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 548 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2022-07-22 12:32:37,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:32:37,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940633904] [2022-07-22 12:32:37,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940633904] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:32:37,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:32:37,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:32:37,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619780445] [2022-07-22 12:32:37,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:32:37,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:32:37,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:32:37,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:32:37,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:32:37,236 INFO L87 Difference]: Start difference. First operand 148405 states and 156552 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:40,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:32:40,442 INFO L93 Difference]: Finished difference Result 297603 states and 313908 transitions. [2022-07-22 12:32:40,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:32:40,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 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 547 [2022-07-22 12:32:40,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:32:40,628 INFO L225 Difference]: With dead ends: 297603 [2022-07-22 12:32:40,628 INFO L226 Difference]: Without dead ends: 149987 [2022-07-22 12:32:40,708 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 [2022-07-22 12:32:40,709 INFO L413 NwaCegarLoop]: 1352 mSDtfsCounter, 860 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:32:40,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 1437 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 12:32:40,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149987 states. [2022-07-22 12:32:42,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149987 to 148403. [2022-07-22 12:32:42,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148403 states, 148402 states have (on average 1.0464683764369753) internal successors, (155298), 148402 states have internal predecessors, (155298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:42,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148403 states to 148403 states and 155298 transitions. [2022-07-22 12:32:42,455 INFO L78 Accepts]: Start accepts. Automaton has 148403 states and 155298 transitions. Word has length 547 [2022-07-22 12:32:42,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:32:42,455 INFO L495 AbstractCegarLoop]: Abstraction has 148403 states and 155298 transitions. [2022-07-22 12:32:42,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:42,455 INFO L276 IsEmpty]: Start isEmpty. Operand 148403 states and 155298 transitions. [2022-07-22 12:32:42,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2022-07-22 12:32:42,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:32:42,466 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-22 12:32:42,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 12:32:42,466 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:32:42,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:32:42,467 INFO L85 PathProgramCache]: Analyzing trace with hash -789939351, now seen corresponding path program 1 times [2022-07-22 12:32:42,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:32:42,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43826796] [2022-07-22 12:32:42,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:42,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:32:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 492 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-22 12:32:42,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:32:42,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43826796] [2022-07-22 12:32:42,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43826796] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:32:42,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:32:42,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:32:42,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163056891] [2022-07-22 12:32:42,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:32:42,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:32:42,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:32:42,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:32:42,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:32:42,642 INFO L87 Difference]: Start difference. First operand 148403 states and 155298 transitions. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:32:46,179 INFO L93 Difference]: Finished difference Result 288107 states and 302381 transitions. [2022-07-22 12:32:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:32:46,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 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 572 [2022-07-22 12:32:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:32:46,384 INFO L225 Difference]: With dead ends: 288107 [2022-07-22 12:32:46,384 INFO L226 Difference]: Without dead ends: 157814 [2022-07-22 12:32:46,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:32:46,454 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 1088 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2206 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1088 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 2206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:32:46,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1088 Valid, 357 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 2206 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 12:32:46,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157814 states. [2022-07-22 12:32:48,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157814 to 156240. [2022-07-22 12:32:48,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156240 states, 156239 states have (on average 1.0429918266245943) internal successors, (162956), 156239 states have internal predecessors, (162956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:48,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156240 states to 156240 states and 162956 transitions. [2022-07-22 12:32:48,454 INFO L78 Accepts]: Start accepts. Automaton has 156240 states and 162956 transitions. Word has length 572 [2022-07-22 12:32:48,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:32:48,455 INFO L495 AbstractCegarLoop]: Abstraction has 156240 states and 162956 transitions. [2022-07-22 12:32:48,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:48,455 INFO L276 IsEmpty]: Start isEmpty. Operand 156240 states and 162956 transitions. [2022-07-22 12:32:48,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2022-07-22 12:32:48,467 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:32:48,467 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:32:48,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 12:32:48,467 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:32:48,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:32:48,467 INFO L85 PathProgramCache]: Analyzing trace with hash -523411731, now seen corresponding path program 1 times [2022-07-22 12:32:48,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:32:48,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838002096] [2022-07-22 12:32:48,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:48,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:32:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 879 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-07-22 12:32:48,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:32:48,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838002096] [2022-07-22 12:32:48,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838002096] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:32:48,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:32:48,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:32:48,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642156359] [2022-07-22 12:32:48,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:32:48,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:32:48,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:32:48,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:32:48,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:32:48,625 INFO L87 Difference]: Start difference. First operand 156240 states and 162956 transitions. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:51,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:32:51,695 INFO L93 Difference]: Finished difference Result 295174 states and 308343 transitions. [2022-07-22 12:32:51,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:32:51,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 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 596 [2022-07-22 12:32:51,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:32:51,900 INFO L225 Difference]: With dead ends: 295174 [2022-07-22 12:32:51,900 INFO L226 Difference]: Without dead ends: 156254 [2022-07-22 12:32:51,980 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 [2022-07-22 12:32:51,980 INFO L413 NwaCegarLoop]: 1590 mSDtfsCounter, 780 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2414 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 2547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:32:51,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 1720 Invalid, 2547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2414 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 12:32:52,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156254 states.