./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label25.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem12_label25.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 e174a47646cc352906a4c559dce6734a9432a39b7e8aac542f068ec793f56d82 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:39:14,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:39:14,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:39:14,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:39:14,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:39:14,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:39:14,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:39:14,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:39:14,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:39:14,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:39:14,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:39:14,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:39:14,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:39:14,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:39:14,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:39:14,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:39:14,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:39:14,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:39:14,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:39:14,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:39:14,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:39:14,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:39:14,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:39:14,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:39:14,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:39:14,749 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:39:14,749 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:39:14,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:39:14,750 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:39:14,751 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:39:14,751 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:39:14,752 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:39:14,753 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:39:14,753 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:39:14,754 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:39:14,754 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:39:14,756 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:39:14,756 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:39:14,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:39:14,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:39:14,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:39:14,758 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:39:14,782 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:39:14,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:39:14,782 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:39:14,783 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:39:14,783 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:39:14,783 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:39:14,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:39:14,784 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:39:14,784 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:39:14,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:39:14,785 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:39:14,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:39:14,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:39:14,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:39:14,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:39:14,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:39:14,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:39:14,786 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:39:14,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:39:14,786 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:39:14,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:39:14,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:39:14,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:39:14,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:39:14,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:39:14,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:39:14,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:39:14,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:39:14,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:39:14,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:39:14,788 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:39:14,788 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:39:14,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:39:14,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:39:14,788 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e174a47646cc352906a4c559dce6734a9432a39b7e8aac542f068ec793f56d82 [2021-12-15 09:39:14,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:39:15,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:39:15,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:39:15,008 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:39:15,008 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:39:15,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label25.c [2021-12-15 09:39:15,054 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7f841ae4/484407fc867b4c248051722dd5f25e8a/FLAG74a0e2517 [2021-12-15 09:39:15,696 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:39:15,697 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label25.c [2021-12-15 09:39:15,730 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7f841ae4/484407fc867b4c248051722dd5f25e8a/FLAG74a0e2517 [2021-12-15 09:39:16,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7f841ae4/484407fc867b4c248051722dd5f25e8a [2021-12-15 09:39:16,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:39:16,089 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:39:16,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:39:16,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:39:16,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:39:16,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:39:16" (1/1) ... [2021-12-15 09:39:16,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45168e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:16, skipping insertion in model container [2021-12-15 09:39:16,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:39:16" (1/1) ... [2021-12-15 09:39:16,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:39:16,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:39:16,400 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label25.c[2447,2460] [2021-12-15 09:39:17,017 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:39:17,023 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:39:17,043 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label25.c[2447,2460] [2021-12-15 09:39:17,315 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:39:17,330 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:39:17,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:17 WrapperNode [2021-12-15 09:39:17,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:39:17,332 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:39:17,332 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:39:17,332 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:39:17,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:17" (1/1) ... [2021-12-15 09:39:17,376 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:17" (1/1) ... [2021-12-15 09:39:17,599 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-15 09:39:17,600 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:39:17,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:39:17,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:39:17,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:39:17,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:17" (1/1) ... [2021-12-15 09:39:17,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:17" (1/1) ... [2021-12-15 09:39:17,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:17" (1/1) ... [2021-12-15 09:39:17,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:17" (1/1) ... [2021-12-15 09:39:17,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:17" (1/1) ... [2021-12-15 09:39:17,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:17" (1/1) ... [2021-12-15 09:39:17,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:17" (1/1) ... [2021-12-15 09:39:17,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:39:17,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:39:17,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:39:17,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:39:17,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:17" (1/1) ... [2021-12-15 09:39:17,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:39:17,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:39:17,981 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 09:39:17,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 09:39:18,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:39:18,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:39:18,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:39:18,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:39:18,059 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:39:18,060 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:39:20,686 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:39:20,700 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:39:20,701 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:39:20,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:39:20 BoogieIcfgContainer [2021-12-15 09:39:20,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:39:20,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:39:20,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:39:20,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:39:20,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:39:16" (1/3) ... [2021-12-15 09:39:20,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69cb4c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:39:20, skipping insertion in model container [2021-12-15 09:39:20,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:17" (2/3) ... [2021-12-15 09:39:20,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69cb4c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:39:20, skipping insertion in model container [2021-12-15 09:39:20,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:39:20" (3/3) ... [2021-12-15 09:39:20,710 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label25.c [2021-12-15 09:39:20,714 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:39:20,714 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:39:20,756 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:39:20,761 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:39:20,762 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:39:20,786 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:20,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 09:39:20,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:20,793 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:20,794 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:20,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:20,798 INFO L85 PathProgramCache]: Analyzing trace with hash 156847385, now seen corresponding path program 1 times [2021-12-15 09:39:20,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:20,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304129419] [2021-12-15 09:39:20,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:20,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:39:20,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:20,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304129419] [2021-12-15 09:39:20,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304129419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:20,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:20,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:39:20,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339646516] [2021-12-15 09:39:20,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:20,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:20,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:21,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:21,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:21,023 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:23,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:23,745 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-12-15 09:39:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:23,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-12-15 09:39:23,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:23,787 INFO L225 Difference]: With dead ends: 2388 [2021-12-15 09:39:23,789 INFO L226 Difference]: Without dead ends: 1506 [2021-12-15 09:39:23,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:23,799 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 880 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:23,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [880 Valid, 156 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 09:39:23,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-12-15 09:39:23,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-12-15 09:39:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.8458471760797341) internal successors, (2778), 1505 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2778 transitions. [2021-12-15 09:39:23,889 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2778 transitions. Word has length 17 [2021-12-15 09:39:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:23,890 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2778 transitions. [2021-12-15 09:39:23,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2778 transitions. [2021-12-15 09:39:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-15 09:39:23,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:23,892 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:39:23,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:39:23,893 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:23,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:23,895 INFO L85 PathProgramCache]: Analyzing trace with hash -192889114, now seen corresponding path program 1 times [2021-12-15 09:39:23,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:23,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874372023] [2021-12-15 09:39:23,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:23,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:39:24,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:24,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874372023] [2021-12-15 09:39:24,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874372023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:24,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:24,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:39:24,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080391971] [2021-12-15 09:39:24,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:24,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:24,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:24,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:24,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:24,035 INFO L87 Difference]: Start difference. First operand 1506 states and 2778 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:26,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:26,260 INFO L93 Difference]: Finished difference Result 3761 states and 6893 transitions. [2021-12-15 09:39:26,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:26,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-12-15 09:39:26,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:26,268 INFO L225 Difference]: With dead ends: 3761 [2021-12-15 09:39:26,268 INFO L226 Difference]: Without dead ends: 2257 [2021-12-15 09:39:26,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:26,271 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:26,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 448 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 09:39:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-12-15 09:39:26,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2021-12-15 09:39:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.4419326241134751) internal successors, (3253), 2256 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3253 transitions. [2021-12-15 09:39:26,310 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3253 transitions. Word has length 86 [2021-12-15 09:39:26,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:26,311 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3253 transitions. [2021-12-15 09:39:26,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:26,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3253 transitions. [2021-12-15 09:39:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-15 09:39:26,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:26,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:26,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:39:26,320 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:26,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:26,321 INFO L85 PathProgramCache]: Analyzing trace with hash 661328267, now seen corresponding path program 1 times [2021-12-15 09:39:26,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:26,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557371723] [2021-12-15 09:39:26,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:26,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:39:26,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:26,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557371723] [2021-12-15 09:39:26,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557371723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:26,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:26,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:26,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835685996] [2021-12-15 09:39:26,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:26,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:26,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:26,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:26,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:26,402 INFO L87 Difference]: Start difference. First operand 2257 states and 3253 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:28,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:28,855 INFO L93 Difference]: Finished difference Result 6765 states and 9754 transitions. [2021-12-15 09:39:28,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:28,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2021-12-15 09:39:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:28,871 INFO L225 Difference]: With dead ends: 6765 [2021-12-15 09:39:28,887 INFO L226 Difference]: Without dead ends: 4510 [2021-12-15 09:39:28,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:28,895 INFO L933 BasicCegarLoop]: 1370 mSDtfsCounter, 739 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 3089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:28,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 1378 Invalid, 3089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:39:28,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2021-12-15 09:39:28,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4510. [2021-12-15 09:39:28,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4509 states have (on average 1.3714792636948325) internal successors, (6184), 4509 states have internal predecessors, (6184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:28,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 6184 transitions. [2021-12-15 09:39:28,964 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 6184 transitions. Word has length 88 [2021-12-15 09:39:28,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:28,965 INFO L470 AbstractCegarLoop]: Abstraction has 4510 states and 6184 transitions. [2021-12-15 09:39:28,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:28,966 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 6184 transitions. [2021-12-15 09:39:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-15 09:39:28,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:28,969 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:39:28,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:39:28,970 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:28,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:28,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1669164678, now seen corresponding path program 1 times [2021-12-15 09:39:28,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:28,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733370149] [2021-12-15 09:39:28,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:28,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:39:29,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:29,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733370149] [2021-12-15 09:39:29,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733370149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:29,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:29,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:29,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983062273] [2021-12-15 09:39:29,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:29,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:39:29,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:29,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:39:29,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:39:29,156 INFO L87 Difference]: Start difference. First operand 4510 states and 6184 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:32,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:32,693 INFO L93 Difference]: Finished difference Result 9769 states and 13273 transitions. [2021-12-15 09:39:32,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:39:32,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-12-15 09:39:32,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:32,709 INFO L225 Difference]: With dead ends: 9769 [2021-12-15 09:39:32,709 INFO L226 Difference]: Without dead ends: 5261 [2021-12-15 09:39:32,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:39:32,722 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 2182 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4828 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2182 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 5487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 4828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:32,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2182 Valid, 240 Invalid, 5487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [659 Valid, 4828 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-15 09:39:32,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2021-12-15 09:39:32,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5261. [2021-12-15 09:39:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.2979087452471483) internal successors, (6827), 5260 states have internal predecessors, (6827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:32,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 6827 transitions. [2021-12-15 09:39:32,790 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 6827 transitions. Word has length 94 [2021-12-15 09:39:32,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:32,791 INFO L470 AbstractCegarLoop]: Abstraction has 5261 states and 6827 transitions. [2021-12-15 09:39:32,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:32,791 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 6827 transitions. [2021-12-15 09:39:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-15 09:39:32,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:32,795 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:32,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:39:32,796 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:32,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:32,796 INFO L85 PathProgramCache]: Analyzing trace with hash -819616184, now seen corresponding path program 1 times [2021-12-15 09:39:32,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:32,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560504418] [2021-12-15 09:39:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:32,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:39:32,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:32,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560504418] [2021-12-15 09:39:32,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560504418] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:32,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:32,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:32,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909673739] [2021-12-15 09:39:32,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:32,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:39:32,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:32,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:39:32,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:39:32,907 INFO L87 Difference]: Start difference. First operand 5261 states and 6827 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:35,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:35,979 INFO L93 Difference]: Finished difference Result 12812 states and 17222 transitions. [2021-12-15 09:39:35,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:39:35,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 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 165 [2021-12-15 09:39:35,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:36,000 INFO L225 Difference]: With dead ends: 12812 [2021-12-15 09:39:36,000 INFO L226 Difference]: Without dead ends: 8267 [2021-12-15 09:39:36,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:39:36,007 INFO L933 BasicCegarLoop]: 599 mSDtfsCounter, 692 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 3682 mSolverCounterSat, 657 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 4339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 657 IncrementalHoareTripleChecker+Valid, 3682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:36,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 618 Invalid, 4339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [657 Valid, 3682 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 09:39:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8267 states. [2021-12-15 09:39:36,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8267 to 8265. [2021-12-15 09:39:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8265 states, 8264 states have (on average 1.1948209099709584) internal successors, (9874), 8264 states have internal predecessors, (9874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:36,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8265 states to 8265 states and 9874 transitions. [2021-12-15 09:39:36,184 INFO L78 Accepts]: Start accepts. Automaton has 8265 states and 9874 transitions. Word has length 165 [2021-12-15 09:39:36,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:36,186 INFO L470 AbstractCegarLoop]: Abstraction has 8265 states and 9874 transitions. [2021-12-15 09:39:36,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:36,188 INFO L276 IsEmpty]: Start isEmpty. Operand 8265 states and 9874 transitions. [2021-12-15 09:39:36,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-15 09:39:36,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:36,190 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:36,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:39:36,191 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:36,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:36,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1422504931, now seen corresponding path program 1 times [2021-12-15 09:39:36,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:36,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813083778] [2021-12-15 09:39:36,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:36,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-15 09:39:36,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:36,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813083778] [2021-12-15 09:39:36,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813083778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:36,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:36,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:39:36,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186471132] [2021-12-15 09:39:36,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:36,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:36,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:36,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:36,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:36,316 INFO L87 Difference]: Start difference. First operand 8265 states and 9874 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:38,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:38,084 INFO L93 Difference]: Finished difference Result 20285 states and 24949 transitions. [2021-12-15 09:39:38,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:38,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 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 239 [2021-12-15 09:39:38,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:38,124 INFO L225 Difference]: With dead ends: 20285 [2021-12-15 09:39:38,125 INFO L226 Difference]: Without dead ends: 12773 [2021-12-15 09:39:38,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:38,133 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:38,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 312 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 09:39:38,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12773 states. [2021-12-15 09:39:38,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12773 to 12020. [2021-12-15 09:39:38,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12020 states, 12019 states have (on average 1.1859555703469506) internal successors, (14254), 12019 states have internal predecessors, (14254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:38,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12020 states to 12020 states and 14254 transitions. [2021-12-15 09:39:38,281 INFO L78 Accepts]: Start accepts. Automaton has 12020 states and 14254 transitions. Word has length 239 [2021-12-15 09:39:38,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:38,281 INFO L470 AbstractCegarLoop]: Abstraction has 12020 states and 14254 transitions. [2021-12-15 09:39:38,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:38,282 INFO L276 IsEmpty]: Start isEmpty. Operand 12020 states and 14254 transitions. [2021-12-15 09:39:38,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-15 09:39:38,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:38,285 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:38,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:39:38,285 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:38,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:38,286 INFO L85 PathProgramCache]: Analyzing trace with hash -110863839, now seen corresponding path program 1 times [2021-12-15 09:39:38,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:38,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336221094] [2021-12-15 09:39:38,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:38,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-15 09:39:38,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:38,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336221094] [2021-12-15 09:39:38,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336221094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:38,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:38,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:38,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828956124] [2021-12-15 09:39:38,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:38,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:38,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:38,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:38,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:38,429 INFO L87 Difference]: Start difference. First operand 12020 states and 14254 transitions. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:40,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:40,798 INFO L93 Difference]: Finished difference Result 27793 states and 33809 transitions. [2021-12-15 09:39:40,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:40,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 306 [2021-12-15 09:39:40,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:40,823 INFO L225 Difference]: With dead ends: 27793 [2021-12-15 09:39:40,823 INFO L226 Difference]: Without dead ends: 16526 [2021-12-15 09:39:40,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:40,832 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 829 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 1005 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 3042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1005 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:40,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 142 Invalid, 3042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1005 Valid, 2037 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:39:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16526 states. [2021-12-15 09:39:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16526 to 16526. [2021-12-15 09:39:40,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16526 states, 16525 states have (on average 1.2055673222390317) internal successors, (19922), 16525 states have internal predecessors, (19922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16526 states to 16526 states and 19922 transitions. [2021-12-15 09:39:40,999 INFO L78 Accepts]: Start accepts. Automaton has 16526 states and 19922 transitions. Word has length 306 [2021-12-15 09:39:40,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:40,999 INFO L470 AbstractCegarLoop]: Abstraction has 16526 states and 19922 transitions. [2021-12-15 09:39:40,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:41,000 INFO L276 IsEmpty]: Start isEmpty. Operand 16526 states and 19922 transitions. [2021-12-15 09:39:41,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-12-15 09:39:41,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:41,003 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:41,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:39:41,003 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:41,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:41,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1779825078, now seen corresponding path program 1 times [2021-12-15 09:39:41,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:41,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127233445] [2021-12-15 09:39:41,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:41,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 44 proven. 108 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-15 09:39:41,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:41,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127233445] [2021-12-15 09:39:41,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127233445] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:39:41,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094191905] [2021-12-15 09:39:41,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:41,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:39:41,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:39:41,167 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:39:41,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:39:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:41,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:39:41,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:39:41,780 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-15 09:39:41,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:39:41,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094191905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:41,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:39:41,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:39:41,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172082972] [2021-12-15 09:39:41,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:41,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:41,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:41,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:41,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:39:41,783 INFO L87 Difference]: Start difference. First operand 16526 states and 19922 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:44,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:44,161 INFO L93 Difference]: Finished difference Result 36054 states and 43961 transitions. [2021-12-15 09:39:44,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:44,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 [2021-12-15 09:39:44,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:44,200 INFO L225 Difference]: With dead ends: 36054 [2021-12-15 09:39:44,200 INFO L226 Difference]: Without dead ends: 20281 [2021-12-15 09:39:44,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:39:44,215 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 763 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2075 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 2782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 2075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:44,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 238 Invalid, 2782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 2075 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:39:44,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20281 states. [2021-12-15 09:39:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20281 to 20281. [2021-12-15 09:39:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20281 states, 20280 states have (on average 1.2054240631163708) internal successors, (24446), 20280 states have internal predecessors, (24446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20281 states to 20281 states and 24446 transitions. [2021-12-15 09:39:44,436 INFO L78 Accepts]: Start accepts. Automaton has 20281 states and 24446 transitions. Word has length 335 [2021-12-15 09:39:44,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:44,436 INFO L470 AbstractCegarLoop]: Abstraction has 20281 states and 24446 transitions. [2021-12-15 09:39:44,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:44,436 INFO L276 IsEmpty]: Start isEmpty. Operand 20281 states and 24446 transitions. [2021-12-15 09:39:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-12-15 09:39:44,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:44,440 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:44,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 09:39:44,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:39:44,658 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:44,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:44,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1892016510, now seen corresponding path program 1 times [2021-12-15 09:39:44,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:44,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705994288] [2021-12-15 09:39:44,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:44,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 282 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 09:39:44,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:44,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705994288] [2021-12-15 09:39:44,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705994288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:44,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:44,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:44,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633852243] [2021-12-15 09:39:44,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:44,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:44,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:44,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:44,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:44,772 INFO L87 Difference]: Start difference. First operand 20281 states and 24446 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:47,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:47,340 INFO L93 Difference]: Finished difference Result 49572 states and 60232 transitions. [2021-12-15 09:39:47,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:47,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 [2021-12-15 09:39:47,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:47,429 INFO L225 Difference]: With dead ends: 49572 [2021-12-15 09:39:47,443 INFO L226 Difference]: Without dead ends: 30044 [2021-12-15 09:39:47,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:47,469 INFO L933 BasicCegarLoop]: 1239 mSDtfsCounter, 636 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2625 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 2958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 2625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:47,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 1246 Invalid, 2958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 2625 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:39:47,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30044 states. [2021-12-15 09:39:47,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30044 to 29293. [2021-12-15 09:39:47,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29293 states, 29292 states have (on average 1.2024443534070737) internal successors, (35222), 29292 states have internal predecessors, (35222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:47,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29293 states to 29293 states and 35222 transitions. [2021-12-15 09:39:47,833 INFO L78 Accepts]: Start accepts. Automaton has 29293 states and 35222 transitions. Word has length 344 [2021-12-15 09:39:47,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:47,833 INFO L470 AbstractCegarLoop]: Abstraction has 29293 states and 35222 transitions. [2021-12-15 09:39:47,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:47,834 INFO L276 IsEmpty]: Start isEmpty. Operand 29293 states and 35222 transitions. [2021-12-15 09:39:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-12-15 09:39:47,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:47,838 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:47,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:39:47,838 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:47,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:47,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1396170572, now seen corresponding path program 1 times [2021-12-15 09:39:47,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:47,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727746087] [2021-12-15 09:39:47,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:47,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-15 09:39:47,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:47,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727746087] [2021-12-15 09:39:47,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727746087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:47,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:47,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:47,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147196808] [2021-12-15 09:39:47,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:47,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:47,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:47,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:47,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:47,931 INFO L87 Difference]: Start difference. First operand 29293 states and 35222 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:50,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:50,642 INFO L93 Difference]: Finished difference Result 58584 states and 70445 transitions. [2021-12-15 09:39:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:50,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 348 [2021-12-15 09:39:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:50,675 INFO L225 Difference]: With dead ends: 58584 [2021-12-15 09:39:50,676 INFO L226 Difference]: Without dead ends: 30044 [2021-12-15 09:39:50,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:50,687 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 762 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2510 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 2874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 2510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:50,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 367 Invalid, 2874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 2510 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:39:50,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30044 states. [2021-12-15 09:39:50,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30044 to 28542. [2021-12-15 09:39:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28542 states, 28541 states have (on average 1.1880452682106444) internal successors, (33908), 28541 states have internal predecessors, (33908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28542 states to 28542 states and 33908 transitions. [2021-12-15 09:39:50,950 INFO L78 Accepts]: Start accepts. Automaton has 28542 states and 33908 transitions. Word has length 348 [2021-12-15 09:39:50,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:50,950 INFO L470 AbstractCegarLoop]: Abstraction has 28542 states and 33908 transitions. [2021-12-15 09:39:50,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:50,951 INFO L276 IsEmpty]: Start isEmpty. Operand 28542 states and 33908 transitions. [2021-12-15 09:39:50,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2021-12-15 09:39:50,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:50,957 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:50,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:39:50,957 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:50,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:50,958 INFO L85 PathProgramCache]: Analyzing trace with hash 579469187, now seen corresponding path program 1 times [2021-12-15 09:39:50,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:50,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850281902] [2021-12-15 09:39:50,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:50,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 426 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-15 09:39:51,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:51,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850281902] [2021-12-15 09:39:51,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850281902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:51,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:51,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:51,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389533941] [2021-12-15 09:39:51,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:51,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:51,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:51,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:51,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:51,049 INFO L87 Difference]: Start difference. First operand 28542 states and 33908 transitions. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:53,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:53,474 INFO L93 Difference]: Finished difference Result 77359 states and 93126 transitions. [2021-12-15 09:39:53,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:53,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 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 [2021-12-15 09:39:53,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:53,527 INFO L225 Difference]: With dead ends: 77359 [2021-12-15 09:39:53,528 INFO L226 Difference]: Without dead ends: 49570 [2021-12-15 09:39:53,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:53,543 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 705 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2282 mSolverCounterSat, 648 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 648 IncrementalHoareTripleChecker+Valid, 2282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:53,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 527 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [648 Valid, 2282 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:39:53,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49570 states. [2021-12-15 09:39:53,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49570 to 48819. [2021-12-15 09:39:53,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48819 states, 48818 states have (on average 1.1708795935925274) internal successors, (57160), 48818 states have internal predecessors, (57160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:53,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48819 states to 48819 states and 57160 transitions. [2021-12-15 09:39:53,945 INFO L78 Accepts]: Start accepts. Automaton has 48819 states and 57160 transitions. Word has length 403 [2021-12-15 09:39:53,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:53,946 INFO L470 AbstractCegarLoop]: Abstraction has 48819 states and 57160 transitions. [2021-12-15 09:39:53,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:53,946 INFO L276 IsEmpty]: Start isEmpty. Operand 48819 states and 57160 transitions. [2021-12-15 09:39:53,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-12-15 09:39:53,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:53,952 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:53,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:39:53,952 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:53,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:53,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1934480625, now seen corresponding path program 1 times [2021-12-15 09:39:53,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:53,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135600392] [2021-12-15 09:39:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:53,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-12-15 09:39:54,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:54,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135600392] [2021-12-15 09:39:54,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135600392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:54,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:54,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:54,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701444116] [2021-12-15 09:39:54,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:54,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:54,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:54,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:54,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:54,068 INFO L87 Difference]: Start difference. First operand 48819 states and 57160 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:56,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:56,368 INFO L93 Difference]: Finished difference Result 111905 states and 131729 transitions. [2021-12-15 09:39:56,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:56,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-12-15 09:39:56,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:56,451 INFO L225 Difference]: With dead ends: 111905 [2021-12-15 09:39:56,452 INFO L226 Difference]: Without dead ends: 63839 [2021-12-15 09:39:56,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:56,488 INFO L933 BasicCegarLoop]: 1109 mSDtfsCounter, 857 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2198 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 2757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 2198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:56,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 1117 Invalid, 2757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [559 Valid, 2198 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 09:39:56,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63839 states. [2021-12-15 09:39:57,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63839 to 63839. [2021-12-15 09:39:57,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63839 states, 63838 states have (on average 1.156912810551709) internal successors, (73855), 63838 states have internal predecessors, (73855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:57,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63839 states to 63839 states and 73855 transitions. [2021-12-15 09:39:57,116 INFO L78 Accepts]: Start accepts. Automaton has 63839 states and 73855 transitions. Word has length 429 [2021-12-15 09:39:57,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:57,116 INFO L470 AbstractCegarLoop]: Abstraction has 63839 states and 73855 transitions. [2021-12-15 09:39:57,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:57,116 INFO L276 IsEmpty]: Start isEmpty. Operand 63839 states and 73855 transitions. [2021-12-15 09:39:57,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2021-12-15 09:39:57,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:57,130 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:57,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:39:57,130 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:57,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:57,130 INFO L85 PathProgramCache]: Analyzing trace with hash 160706966, now seen corresponding path program 1 times [2021-12-15 09:39:57,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:57,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635017085] [2021-12-15 09:39:57,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:57,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 389 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-15 09:39:57,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:57,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635017085] [2021-12-15 09:39:57,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635017085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:57,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:57,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:57,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143514963] [2021-12-15 09:39:57,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:57,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:57,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:57,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:57,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:57,520 INFO L87 Difference]: Start difference. First operand 63839 states and 73855 transitions. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:00,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:00,310 INFO L93 Difference]: Finished difference Result 174238 states and 202234 transitions. [2021-12-15 09:40:00,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:00,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 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 559 [2021-12-15 09:40:00,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:00,449 INFO L225 Difference]: With dead ends: 174238 [2021-12-15 09:40:00,449 INFO L226 Difference]: Without dead ends: 105144 [2021-12-15 09:40:00,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:00,487 INFO L933 BasicCegarLoop]: 1322 mSDtfsCounter, 576 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2245 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 2245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:00,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 1330 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 2245 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:40:00,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105144 states. [2021-12-15 09:40:01,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105144 to 102891. [2021-12-15 09:40:01,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102891 states, 102890 states have (on average 1.1214792496841286) internal successors, (115389), 102890 states have internal predecessors, (115389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:02,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102891 states to 102891 states and 115389 transitions. [2021-12-15 09:40:02,067 INFO L78 Accepts]: Start accepts. Automaton has 102891 states and 115389 transitions. Word has length 559 [2021-12-15 09:40:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:02,068 INFO L470 AbstractCegarLoop]: Abstraction has 102891 states and 115389 transitions. [2021-12-15 09:40:02,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:02,068 INFO L276 IsEmpty]: Start isEmpty. Operand 102891 states and 115389 transitions. [2021-12-15 09:40:02,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2021-12-15 09:40:02,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:02,236 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:40:02,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:40:02,236 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:02,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:02,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1539697602, now seen corresponding path program 1 times [2021-12-15 09:40:02,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:02,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988318874] [2021-12-15 09:40:02,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:02,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 606 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-15 09:40:02,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:02,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988318874] [2021-12-15 09:40:02,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988318874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:02,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:02,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:02,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911086657] [2021-12-15 09:40:02,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:02,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:02,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:02,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:02,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:02,537 INFO L87 Difference]: Start difference. First operand 102891 states and 115389 transitions. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:05,714 INFO L93 Difference]: Finished difference Result 238073 states and 268506 transitions. [2021-12-15 09:40:05,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:05,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 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 641 [2021-12-15 09:40:05,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:06,016 INFO L225 Difference]: With dead ends: 238073 [2021-12-15 09:40:06,016 INFO L226 Difference]: Without dead ends: 135935 [2021-12-15 09:40:06,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:06,051 INFO L933 BasicCegarLoop]: 1278 mSDtfsCounter, 664 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2320 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 2823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 2320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:06,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 1286 Invalid, 2823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [503 Valid, 2320 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:40:06,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135935 states. [2021-12-15 09:40:07,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135935 to 131429. [2021-12-15 09:40:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131429 states, 131428 states have (on average 1.1086602550445872) internal successors, (145709), 131428 states have internal predecessors, (145709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131429 states to 131429 states and 145709 transitions. [2021-12-15 09:40:07,792 INFO L78 Accepts]: Start accepts. Automaton has 131429 states and 145709 transitions. Word has length 641 [2021-12-15 09:40:07,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:07,793 INFO L470 AbstractCegarLoop]: Abstraction has 131429 states and 145709 transitions. [2021-12-15 09:40:07,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:07,793 INFO L276 IsEmpty]: Start isEmpty. Operand 131429 states and 145709 transitions. [2021-12-15 09:40:07,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2021-12-15 09:40:07,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:07,844 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:40:07,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:40:07,844 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:07,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:07,845 INFO L85 PathProgramCache]: Analyzing trace with hash 425959426, now seen corresponding path program 1 times [2021-12-15 09:40:07,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:07,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448350503] [2021-12-15 09:40:07,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:07,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 598 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-15 09:40:07,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:07,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448350503] [2021-12-15 09:40:07,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448350503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:07,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:07,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:07,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227887165] [2021-12-15 09:40:07,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:07,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:07,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:07,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:07,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:07,969 INFO L87 Difference]: Start difference. First operand 131429 states and 145709 transitions. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:11,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:11,008 INFO L93 Difference]: Finished difference Result 262105 states and 290660 transitions. [2021-12-15 09:40:11,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:11,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 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 641 [2021-12-15 09:40:11,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:11,171 INFO L225 Difference]: With dead ends: 262105 [2021-12-15 09:40:11,171 INFO L226 Difference]: Without dead ends: 131429 [2021-12-15 09:40:11,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:11,206 INFO L933 BasicCegarLoop]: 1262 mSDtfsCounter, 669 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:11,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 1270 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 2228 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:40:11,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131429 states. [2021-12-15 09:40:12,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131429 to 129176. [2021-12-15 09:40:12,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129176 states, 129175 states have (on average 1.082856589897426) internal successors, (139878), 129175 states have internal predecessors, (139878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:12,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129176 states to 129176 states and 139878 transitions. [2021-12-15 09:40:12,870 INFO L78 Accepts]: Start accepts. Automaton has 129176 states and 139878 transitions. Word has length 641 [2021-12-15 09:40:12,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:12,870 INFO L470 AbstractCegarLoop]: Abstraction has 129176 states and 139878 transitions. [2021-12-15 09:40:12,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:12,871 INFO L276 IsEmpty]: Start isEmpty. Operand 129176 states and 139878 transitions. [2021-12-15 09:40:12,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 746 [2021-12-15 09:40:12,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:12,902 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:40:12,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 09:40:12,903 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:12,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:12,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1969486598, now seen corresponding path program 1 times [2021-12-15 09:40:12,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:12,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834153900] [2021-12-15 09:40:12,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:12,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-12-15 09:40:13,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:13,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834153900] [2021-12-15 09:40:13,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834153900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:13,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:13,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:13,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330685132] [2021-12-15 09:40:13,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:13,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:13,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:13,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:13,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:13,126 INFO L87 Difference]: Start difference. First operand 129176 states and 139878 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:16,266 INFO L93 Difference]: Finished difference Result 305663 states and 332719 transitions. [2021-12-15 09:40:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:16,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 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 745 [2021-12-15 09:40:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:16,707 INFO L225 Difference]: With dead ends: 305663 [2021-12-15 09:40:16,707 INFO L226 Difference]: Without dead ends: 177240 [2021-12-15 09:40:16,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:16,743 INFO L933 BasicCegarLoop]: 1235 mSDtfsCounter, 806 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2113 mSolverCounterSat, 693 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 2806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 693 IncrementalHoareTripleChecker+Valid, 2113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:16,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 1243 Invalid, 2806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [693 Valid, 2113 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:40:16,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177240 states. [2021-12-15 09:40:18,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177240 to 170481. [2021-12-15 09:40:18,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170481 states, 170480 states have (on average 1.0685886907555138) internal successors, (182173), 170480 states have internal predecessors, (182173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:18,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170481 states to 170481 states and 182173 transitions. [2021-12-15 09:40:18,699 INFO L78 Accepts]: Start accepts. Automaton has 170481 states and 182173 transitions. Word has length 745 [2021-12-15 09:40:18,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:18,700 INFO L470 AbstractCegarLoop]: Abstraction has 170481 states and 182173 transitions. [2021-12-15 09:40:18,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:18,700 INFO L276 IsEmpty]: Start isEmpty. Operand 170481 states and 182173 transitions. [2021-12-15 09:40:18,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 919 [2021-12-15 09:40:18,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:18,753 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:40:18,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 09:40:18,754 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:18,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:18,754 INFO L85 PathProgramCache]: Analyzing trace with hash 2037036223, now seen corresponding path program 1 times [2021-12-15 09:40:18,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:18,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710686179] [2021-12-15 09:40:18,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:18,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 544 proven. 0 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2021-12-15 09:40:19,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:19,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710686179] [2021-12-15 09:40:19,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710686179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:19,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:19,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:19,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916293891] [2021-12-15 09:40:19,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:19,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:19,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:19,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:19,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:19,372 INFO L87 Difference]: Start difference. First operand 170481 states and 182173 transitions. Second operand has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)