./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label08.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label08.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 9e8eccafd5332366d591fd0f563128386bcd6073a7941113bfddd094bb357fdc --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 13:13:20,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 13:13:20,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 13:13:20,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 13:13:20,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 13:13:20,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 13:13:20,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 13:13:20,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 13:13:20,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 13:13:20,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 13:13:20,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 13:13:20,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 13:13:20,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 13:13:20,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 13:13:20,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 13:13:20,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 13:13:20,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 13:13:20,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 13:13:20,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 13:13:20,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 13:13:20,444 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 13:13:20,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 13:13:20,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 13:13:20,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 13:13:20,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 13:13:20,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 13:13:20,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 13:13:20,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 13:13:20,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 13:13:20,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 13:13:20,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 13:13:20,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 13:13:20,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 13:13:20,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 13:13:20,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 13:13:20,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 13:13:20,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 13:13:20,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 13:13:20,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 13:13:20,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 13:13:20,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 13:13:20,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 13:13:20,460 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 13:13:20,485 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 13:13:20,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 13:13:20,486 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 13:13:20,486 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 13:13:20,487 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 13:13:20,487 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 13:13:20,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 13:13:20,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 13:13:20,488 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 13:13:20,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 13:13:20,489 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 13:13:20,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 13:13:20,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 13:13:20,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 13:13:20,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 13:13:20,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 13:13:20,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 13:13:20,490 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 13:13:20,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 13:13:20,490 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 13:13:20,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 13:13:20,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 13:13:20,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 13:13:20,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 13:13:20,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:13:20,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 13:13:20,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 13:13:20,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 13:13:20,506 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 13:13:20,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 13:13:20,507 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 13:13:20,507 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 13:13:20,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 13:13:20,507 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e8eccafd5332366d591fd0f563128386bcd6073a7941113bfddd094bb357fdc [2022-07-13 13:13:20,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 13:13:20,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 13:13:20,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 13:13:20,786 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 13:13:20,787 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 13:13:20,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label08.c [2022-07-13 13:13:20,841 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe69c7da1/27d8c9981adc4b8e916995bf4858c9d3/FLAGdb37cacf6 [2022-07-13 13:13:21,493 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 13:13:21,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label08.c [2022-07-13 13:13:21,519 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe69c7da1/27d8c9981adc4b8e916995bf4858c9d3/FLAGdb37cacf6 [2022-07-13 13:13:21,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe69c7da1/27d8c9981adc4b8e916995bf4858c9d3 [2022-07-13 13:13:21,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 13:13:21,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 13:13:21,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 13:13:21,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 13:13:21,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 13:13:21,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:13:21" (1/1) ... [2022-07-13 13:13:21,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1efe708f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:21, skipping insertion in model container [2022-07-13 13:13:21,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:13:21" (1/1) ... [2022-07-13 13:13:21,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 13:13:21,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 13:13:22,129 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label08.c[8572,8585] [2022-07-13 13:13:22,706 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:13:22,713 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 13:13:22,746 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label08.c[8572,8585] [2022-07-13 13:13:23,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:13:23,077 INFO L208 MainTranslator]: Completed translation [2022-07-13 13:13:23,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:23 WrapperNode [2022-07-13 13:13:23,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 13:13:23,078 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 13:13:23,078 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 13:13:23,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 13:13:23,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:23" (1/1) ... [2022-07-13 13:13:23,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:23" (1/1) ... [2022-07-13 13:13:23,386 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-13 13:13:23,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 13:13:23,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 13:13:23,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 13:13:23,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 13:13:23,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:23" (1/1) ... [2022-07-13 13:13:23,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:23" (1/1) ... [2022-07-13 13:13:23,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:23" (1/1) ... [2022-07-13 13:13:23,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:23" (1/1) ... [2022-07-13 13:13:23,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:23" (1/1) ... [2022-07-13 13:13:23,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:23" (1/1) ... [2022-07-13 13:13:23,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:23" (1/1) ... [2022-07-13 13:13:23,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 13:13:23,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 13:13:23,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 13:13:23,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 13:13:23,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:23" (1/1) ... [2022-07-13 13:13:23,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:13:23,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:13:23,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 13:13:23,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 13:13:23,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 13:13:23,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 13:13:23,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 13:13:23,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 13:13:23,837 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 13:13:23,838 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 13:13:26,691 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 13:13:26,708 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 13:13:26,708 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 13:13:26,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:13:26 BoogieIcfgContainer [2022-07-13 13:13:26,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 13:13:26,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 13:13:26,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 13:13:26,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 13:13:26,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 01:13:21" (1/3) ... [2022-07-13 13:13:26,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b15bc6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:13:26, skipping insertion in model container [2022-07-13 13:13:26,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:13:23" (2/3) ... [2022-07-13 13:13:26,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b15bc6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:13:26, skipping insertion in model container [2022-07-13 13:13:26,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:13:26" (3/3) ... [2022-07-13 13:13:26,722 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label08.c [2022-07-13 13:13:26,734 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 13:13:26,734 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 13:13:26,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 13:13:26,815 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@16cea086, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@8aa9908 [2022-07-13 13:13:26,815 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 13:13:26,823 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-13 13:13:26,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:26,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:26,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:26,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:26,841 INFO L85 PathProgramCache]: Analyzing trace with hash -2074400678, now seen corresponding path program 1 times [2022-07-13 13:13:26,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:26,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627219611] [2022-07-13 13:13:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:26,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:13:27,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:27,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627219611] [2022-07-13 13:13:27,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627219611] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:27,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:27,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:13:27,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165698475] [2022-07-13 13:13:27,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:27,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:27,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:27,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:27,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:27,157 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:29,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:29,711 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2022-07-13 13:13:29,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:29,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2022-07-13 13:13:29,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:29,730 INFO L225 Difference]: With dead ends: 1642 [2022-07-13 13:13:29,730 INFO L226 Difference]: Without dead ends: 975 [2022-07-13 13:13:29,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:29,738 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 432 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:29,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-13 13:13:29,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-07-13 13:13:29,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2022-07-13 13:13:29,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2022-07-13 13:13:29,827 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 58 [2022-07-13 13:13:29,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:29,828 INFO L495 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2022-07-13 13:13:29,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:29,829 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2022-07-13 13:13:29,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-13 13:13:29,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:29,838 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:29,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 13:13:29,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:29,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:29,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1002261606, now seen corresponding path program 1 times [2022-07-13 13:13:29,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:29,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139451614] [2022-07-13 13:13:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:29,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:13:29,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:29,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139451614] [2022-07-13 13:13:29,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139451614] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:29,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:29,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:29,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814209620] [2022-07-13 13:13:29,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:29,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:29,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:29,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:29,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:29,990 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:32,288 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2022-07-13 13:13:32,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:32,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2022-07-13 13:13:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:32,304 INFO L225 Difference]: With dead ends: 2814 [2022-07-13 13:13:32,305 INFO L226 Difference]: Without dead ends: 1844 [2022-07-13 13:13:32,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:32,314 INFO L413 NwaCegarLoop]: 853 mSDtfsCounter, 433 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:32,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 13:13:32,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2022-07-13 13:13:32,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2022-07-13 13:13:32,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:32,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2022-07-13 13:13:32,353 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 128 [2022-07-13 13:13:32,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:32,356 INFO L495 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2022-07-13 13:13:32,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:32,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2022-07-13 13:13:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-13 13:13:32,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:32,367 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:32,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 13:13:32,369 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:32,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:32,370 INFO L85 PathProgramCache]: Analyzing trace with hash -433901431, now seen corresponding path program 1 times [2022-07-13 13:13:32,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:32,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431016122] [2022-07-13 13:13:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:32,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:13:32,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:32,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431016122] [2022-07-13 13:13:32,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431016122] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:32,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:32,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:13:32,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671954809] [2022-07-13 13:13:32,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:32,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:32,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:32,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:32,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:32,544 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:34,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:34,513 INFO L93 Difference]: Finished difference Result 5395 states and 7326 transitions. [2022-07-13 13:13:34,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:34,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 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 150 [2022-07-13 13:13:34,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:34,530 INFO L225 Difference]: With dead ends: 5395 [2022-07-13 13:13:34,531 INFO L226 Difference]: Without dead ends: 2701 [2022-07-13 13:13:34,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:34,542 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 368 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:34,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 13:13:34,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2022-07-13 13:13:34,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2701. [2022-07-13 13:13:34,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 1.191851851851852) internal successors, (3218), 2700 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 3218 transitions. [2022-07-13 13:13:34,621 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 3218 transitions. Word has length 150 [2022-07-13 13:13:34,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:34,622 INFO L495 AbstractCegarLoop]: Abstraction has 2701 states and 3218 transitions. [2022-07-13 13:13:34,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:34,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 3218 transitions. [2022-07-13 13:13:34,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-07-13 13:13:34,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:34,628 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:34,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 13:13:34,629 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:34,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:34,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1641598275, now seen corresponding path program 1 times [2022-07-13 13:13:34,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:34,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135384904] [2022-07-13 13:13:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:34,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:13:34,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:34,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135384904] [2022-07-13 13:13:34,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135384904] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:34,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:34,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:34,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770971705] [2022-07-13 13:13:34,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:34,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:34,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:34,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:34,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:34,830 INFO L87 Difference]: Start difference. First operand 2701 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:36,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:36,298 INFO L93 Difference]: Finished difference Result 7108 states and 8598 transitions. [2022-07-13 13:13:36,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:36,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 210 [2022-07-13 13:13:36,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:36,310 INFO L225 Difference]: With dead ends: 7108 [2022-07-13 13:13:36,310 INFO L226 Difference]: Without dead ends: 4409 [2022-07-13 13:13:36,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:36,315 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:36,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:13:36,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2022-07-13 13:13:36,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 4409. [2022-07-13 13:13:36,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 1.1705989110707804) internal successors, (5160), 4408 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:36,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 5160 transitions. [2022-07-13 13:13:36,376 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 5160 transitions. Word has length 210 [2022-07-13 13:13:36,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:36,376 INFO L495 AbstractCegarLoop]: Abstraction has 4409 states and 5160 transitions. [2022-07-13 13:13:36,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:36,377 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 5160 transitions. [2022-07-13 13:13:36,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-07-13 13:13:36,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:36,379 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:36,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 13:13:36,380 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:36,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:36,380 INFO L85 PathProgramCache]: Analyzing trace with hash 734182776, now seen corresponding path program 1 times [2022-07-13 13:13:36,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:36,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063262972] [2022-07-13 13:13:36,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:36,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-13 13:13:36,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:36,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063262972] [2022-07-13 13:13:36,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063262972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:36,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:36,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:36,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789378888] [2022-07-13 13:13:36,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:36,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:36,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:36,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:36,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:36,545 INFO L87 Difference]: Start difference. First operand 4409 states and 5160 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:38,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:38,256 INFO L93 Difference]: Finished difference Result 10936 states and 12970 transitions. [2022-07-13 13:13:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:38,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 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 212 [2022-07-13 13:13:38,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:38,276 INFO L225 Difference]: With dead ends: 10936 [2022-07-13 13:13:38,276 INFO L226 Difference]: Without dead ends: 6528 [2022-07-13 13:13:38,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:38,283 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 393 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:38,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:13:38,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2022-07-13 13:13:38,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 4382. [2022-07-13 13:13:38,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 1.1684546907098836) internal successors, (5119), 4381 states have internal predecessors, (5119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:38,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 5119 transitions. [2022-07-13 13:13:38,356 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 5119 transitions. Word has length 212 [2022-07-13 13:13:38,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:38,357 INFO L495 AbstractCegarLoop]: Abstraction has 4382 states and 5119 transitions. [2022-07-13 13:13:38,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:38,358 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 5119 transitions. [2022-07-13 13:13:38,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-07-13 13:13:38,361 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:38,361 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 13:13:38,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 13:13:38,363 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:38,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:38,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1597642430, now seen corresponding path program 1 times [2022-07-13 13:13:38,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:38,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392113563] [2022-07-13 13:13:38,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:38,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:13:38,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:38,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392113563] [2022-07-13 13:13:38,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392113563] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:38,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:38,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:38,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54040777] [2022-07-13 13:13:38,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:38,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:38,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:38,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:38,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:38,561 INFO L87 Difference]: Start difference. First operand 4382 states and 5119 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:40,323 INFO L93 Difference]: Finished difference Result 10045 states and 11706 transitions. [2022-07-13 13:13:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:40,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 278 [2022-07-13 13:13:40,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:40,339 INFO L225 Difference]: With dead ends: 10045 [2022-07-13 13:13:40,340 INFO L226 Difference]: Without dead ends: 5665 [2022-07-13 13:13:40,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:40,345 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 378 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:40,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 894 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 13:13:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2022-07-13 13:13:40,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5234. [2022-07-13 13:13:40,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 5233 states have (on average 1.1587999235620103) internal successors, (6064), 5233 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:40,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 6064 transitions. [2022-07-13 13:13:40,428 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 6064 transitions. Word has length 278 [2022-07-13 13:13:40,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:40,428 INFO L495 AbstractCegarLoop]: Abstraction has 5234 states and 6064 transitions. [2022-07-13 13:13:40,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:40,429 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 6064 transitions. [2022-07-13 13:13:40,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-07-13 13:13:40,433 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:40,433 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:40,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 13:13:40,433 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:40,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:40,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1503094523, now seen corresponding path program 1 times [2022-07-13 13:13:40,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:40,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8060745] [2022-07-13 13:13:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:40,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 300 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-13 13:13:40,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:40,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8060745] [2022-07-13 13:13:40,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8060745] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:40,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:40,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:40,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873746365] [2022-07-13 13:13:40,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:40,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:40,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:40,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:40,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:40,632 INFO L87 Difference]: Start difference. First operand 5234 states and 6064 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:42,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:42,645 INFO L93 Difference]: Finished difference Result 13051 states and 15223 transitions. [2022-07-13 13:13:42,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:42,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 290 [2022-07-13 13:13:42,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:42,671 INFO L225 Difference]: With dead ends: 13051 [2022-07-13 13:13:42,671 INFO L226 Difference]: Without dead ends: 7391 [2022-07-13 13:13:42,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:42,679 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 495 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:42,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 629 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1239 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 13:13:42,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7391 states. [2022-07-13 13:13:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7391 to 6959. [2022-07-13 13:13:42,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6959 states, 6958 states have (on average 1.1636964645012935) internal successors, (8097), 6958 states have internal predecessors, (8097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:42,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6959 states to 6959 states and 8097 transitions. [2022-07-13 13:13:42,815 INFO L78 Accepts]: Start accepts. Automaton has 6959 states and 8097 transitions. Word has length 290 [2022-07-13 13:13:42,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:42,816 INFO L495 AbstractCegarLoop]: Abstraction has 6959 states and 8097 transitions. [2022-07-13 13:13:42,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:42,817 INFO L276 IsEmpty]: Start isEmpty. Operand 6959 states and 8097 transitions. [2022-07-13 13:13:42,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-07-13 13:13:42,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:42,821 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:42,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 13:13:42,822 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:42,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:42,823 INFO L85 PathProgramCache]: Analyzing trace with hash 9506808, now seen corresponding path program 1 times [2022-07-13 13:13:42,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:42,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928607207] [2022-07-13 13:13:42,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:42,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-13 13:13:42,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:42,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928607207] [2022-07-13 13:13:42,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928607207] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:42,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:42,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:42,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754943279] [2022-07-13 13:13:42,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:42,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:42,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:42,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:42,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:42,958 INFO L87 Difference]: Start difference. First operand 6959 states and 8097 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:44,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:44,640 INFO L93 Difference]: Finished difference Result 17316 states and 20393 transitions. [2022-07-13 13:13:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:44,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 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 295 [2022-07-13 13:13:44,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:44,658 INFO L225 Difference]: With dead ends: 17316 [2022-07-13 13:13:44,659 INFO L226 Difference]: Without dead ends: 10359 [2022-07-13 13:13:44,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:44,671 INFO L413 NwaCegarLoop]: 774 mSDtfsCounter, 379 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:44,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 841 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:13:44,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2022-07-13 13:13:44,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 9509. [2022-07-13 13:13:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9509 states, 9508 states have (on average 1.141459823306689) internal successors, (10853), 9508 states have internal predecessors, (10853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:44,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9509 states to 9509 states and 10853 transitions. [2022-07-13 13:13:44,801 INFO L78 Accepts]: Start accepts. Automaton has 9509 states and 10853 transitions. Word has length 295 [2022-07-13 13:13:44,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:44,802 INFO L495 AbstractCegarLoop]: Abstraction has 9509 states and 10853 transitions. [2022-07-13 13:13:44,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:44,802 INFO L276 IsEmpty]: Start isEmpty. Operand 9509 states and 10853 transitions. [2022-07-13 13:13:44,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-07-13 13:13:44,807 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:44,807 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:44,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 13:13:44,808 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:44,809 INFO L85 PathProgramCache]: Analyzing trace with hash -881276880, now seen corresponding path program 1 times [2022-07-13 13:13:44,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:44,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896473496] [2022-07-13 13:13:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:44,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 300 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:13:44,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:44,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896473496] [2022-07-13 13:13:44,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896473496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:44,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:44,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:44,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049612712] [2022-07-13 13:13:44,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:44,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:44,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:44,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:44,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:44,947 INFO L87 Difference]: Start difference. First operand 9509 states and 10853 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:46,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:46,587 INFO L93 Difference]: Finished difference Result 22432 states and 25678 transitions. [2022-07-13 13:13:46,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:46,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 313 [2022-07-13 13:13:46,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:46,609 INFO L225 Difference]: With dead ends: 22432 [2022-07-13 13:13:46,610 INFO L226 Difference]: Without dead ends: 12493 [2022-07-13 13:13:46,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:46,621 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 444 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:46,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 294 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:13:46,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12493 states. [2022-07-13 13:13:46,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12493 to 11637. [2022-07-13 13:13:46,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11637 states, 11636 states have (on average 1.1473014781711928) internal successors, (13350), 11636 states have internal predecessors, (13350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:46,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11637 states to 11637 states and 13350 transitions. [2022-07-13 13:13:46,777 INFO L78 Accepts]: Start accepts. Automaton has 11637 states and 13350 transitions. Word has length 313 [2022-07-13 13:13:46,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:46,780 INFO L495 AbstractCegarLoop]: Abstraction has 11637 states and 13350 transitions. [2022-07-13 13:13:46,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 11637 states and 13350 transitions. [2022-07-13 13:13:46,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-07-13 13:13:46,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:46,786 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-13 13:13:46,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 13:13:46,787 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:46,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:46,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1943349219, now seen corresponding path program 1 times [2022-07-13 13:13:46,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:46,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591156963] [2022-07-13 13:13:46,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:46,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:13:46,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:46,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591156963] [2022-07-13 13:13:46,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591156963] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:46,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:46,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:13:46,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933452368] [2022-07-13 13:13:46,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:46,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:13:46,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:46,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:13:46,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:13:46,967 INFO L87 Difference]: Start difference. First operand 11637 states and 13350 transitions. Second operand has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:50,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:50,119 INFO L93 Difference]: Finished difference Result 41232 states and 47494 transitions. [2022-07-13 13:13:50,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:13:50,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 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 318 [2022-07-13 13:13:50,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:50,163 INFO L225 Difference]: With dead ends: 41232 [2022-07-13 13:13:50,164 INFO L226 Difference]: Without dead ends: 28316 [2022-07-13 13:13:50,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:13:50,184 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 867 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2613 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 3103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 2613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:50,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 302 Invalid, 3103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 2613 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-13 13:13:50,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28316 states. [2022-07-13 13:13:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28316 to 27841. [2022-07-13 13:13:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27841 states, 27840 states have (on average 1.135308908045977) internal successors, (31607), 27840 states have internal predecessors, (31607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:50,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27841 states to 27841 states and 31607 transitions. [2022-07-13 13:13:50,622 INFO L78 Accepts]: Start accepts. Automaton has 27841 states and 31607 transitions. Word has length 318 [2022-07-13 13:13:50,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:50,623 INFO L495 AbstractCegarLoop]: Abstraction has 27841 states and 31607 transitions. [2022-07-13 13:13:50,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:50,624 INFO L276 IsEmpty]: Start isEmpty. Operand 27841 states and 31607 transitions. [2022-07-13 13:13:50,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-07-13 13:13:50,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:50,630 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2022-07-13 13:13:50,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 13:13:50,631 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:50,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:50,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2094585251, now seen corresponding path program 1 times [2022-07-13 13:13:50,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:50,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933037900] [2022-07-13 13:13:50,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:50,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:13:50,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:50,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933037900] [2022-07-13 13:13:50,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933037900] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:50,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:50,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:50,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518705415] [2022-07-13 13:13:50,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:50,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:50,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:50,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:50,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:50,795 INFO L87 Difference]: Start difference. First operand 27841 states and 31607 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:52,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:52,723 INFO L93 Difference]: Finished difference Result 71054 states and 80878 transitions. [2022-07-13 13:13:52,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:52,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 347 [2022-07-13 13:13:52,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:52,784 INFO L225 Difference]: With dead ends: 71054 [2022-07-13 13:13:52,785 INFO L226 Difference]: Without dead ends: 42777 [2022-07-13 13:13:52,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:52,812 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 449 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:52,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 704 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 13:13:52,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42777 states. [2022-07-13 13:13:53,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42777 to 41033. [2022-07-13 13:13:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41033 states, 41032 states have (on average 1.122514135309027) internal successors, (46059), 41032 states have internal predecessors, (46059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:53,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41033 states to 41033 states and 46059 transitions. [2022-07-13 13:13:53,512 INFO L78 Accepts]: Start accepts. Automaton has 41033 states and 46059 transitions. Word has length 347 [2022-07-13 13:13:53,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:53,512 INFO L495 AbstractCegarLoop]: Abstraction has 41033 states and 46059 transitions. [2022-07-13 13:13:53,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:53,513 INFO L276 IsEmpty]: Start isEmpty. Operand 41033 states and 46059 transitions. [2022-07-13 13:13:53,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2022-07-13 13:13:53,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:53,523 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:53,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 13:13:53,523 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:53,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:53,524 INFO L85 PathProgramCache]: Analyzing trace with hash 886548778, now seen corresponding path program 1 times [2022-07-13 13:13:53,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:53,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291232444] [2022-07-13 13:13:53,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:53,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-07-13 13:13:53,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:53,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291232444] [2022-07-13 13:13:53,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291232444] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:53,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:53,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:53,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91121357] [2022-07-13 13:13:53,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:53,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:53,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:53,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:53,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:53,876 INFO L87 Difference]: Start difference. First operand 41033 states and 46059 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:55,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:55,535 INFO L93 Difference]: Finished difference Result 91426 states and 102896 transitions. [2022-07-13 13:13:55,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:55,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 391 [2022-07-13 13:13:55,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:55,737 INFO L225 Difference]: With dead ends: 91426 [2022-07-13 13:13:55,738 INFO L226 Difference]: Without dead ends: 49966 [2022-07-13 13:13:55,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:55,778 INFO L413 NwaCegarLoop]: 676 mSDtfsCounter, 440 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:55,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 727 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:13:55,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49966 states. [2022-07-13 13:13:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49966 to 49959. [2022-07-13 13:13:56,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49959 states, 49958 states have (on average 1.1129548821009647) internal successors, (55601), 49958 states have internal predecessors, (55601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:56,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49959 states to 49959 states and 55601 transitions. [2022-07-13 13:13:56,524 INFO L78 Accepts]: Start accepts. Automaton has 49959 states and 55601 transitions. Word has length 391 [2022-07-13 13:13:56,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:56,525 INFO L495 AbstractCegarLoop]: Abstraction has 49959 states and 55601 transitions. [2022-07-13 13:13:56,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:56,526 INFO L276 IsEmpty]: Start isEmpty. Operand 49959 states and 55601 transitions. [2022-07-13 13:13:56,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-07-13 13:13:56,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:56,541 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:56,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 13:13:56,542 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:56,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:56,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1094283383, now seen corresponding path program 1 times [2022-07-13 13:13:56,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:56,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342976440] [2022-07-13 13:13:56,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:56,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 244 proven. 82 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-13 13:13:56,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:56,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342976440] [2022-07-13 13:13:56,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342976440] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:13:56,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338688297] [2022-07-13 13:13:56,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:56,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:13:56,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:13:56,873 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:13:56,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 13:13:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:57,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 13:13:57,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:13:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 244 proven. 82 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-13 13:13:57,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:13:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-13 13:13:58,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338688297] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 13:13:58,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 13:13:58,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-07-13 13:13:58,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97742907] [2022-07-13 13:13:58,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:58,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:13:58,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:58,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:13:58,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:13:58,114 INFO L87 Difference]: Start difference. First operand 49959 states and 55601 transitions. Second operand has 4 states, 4 states have (on average 84.75) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:01,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:01,131 INFO L93 Difference]: Finished difference Result 120772 states and 134197 transitions. [2022-07-13 13:14:01,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:14:01,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.75) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 394 [2022-07-13 13:14:01,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:01,208 INFO L225 Difference]: With dead ends: 120772 [2022-07-13 13:14:01,208 INFO L226 Difference]: Without dead ends: 69946 [2022-07-13 13:14:01,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 783 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:14:01,233 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 860 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 2111 mSolverCounterSat, 692 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 692 IncrementalHoareTripleChecker+Valid, 2111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:01,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 144 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [692 Valid, 2111 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-13 13:14:01,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69946 states. [2022-07-13 13:14:01,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69946 to 67818. [2022-07-13 13:14:02,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67818 states, 67817 states have (on average 1.0979105534010647) internal successors, (74457), 67817 states have internal predecessors, (74457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67818 states to 67818 states and 74457 transitions. [2022-07-13 13:14:02,106 INFO L78 Accepts]: Start accepts. Automaton has 67818 states and 74457 transitions. Word has length 394 [2022-07-13 13:14:02,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:02,107 INFO L495 AbstractCegarLoop]: Abstraction has 67818 states and 74457 transitions. [2022-07-13 13:14:02,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.75) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:02,108 INFO L276 IsEmpty]: Start isEmpty. Operand 67818 states and 74457 transitions. [2022-07-13 13:14:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2022-07-13 13:14:02,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:02,123 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:14:02,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 13:14:02,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 13:14:02,347 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:02,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:02,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1101543085, now seen corresponding path program 1 times [2022-07-13 13:14:02,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:02,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798602552] [2022-07-13 13:14:02,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:02,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:14:02,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:02,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798602552] [2022-07-13 13:14:02,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798602552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:02,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:02,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:14:02,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59282657] [2022-07-13 13:14:02,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:02,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:14:02,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:02,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:14:02,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:02,748 INFO L87 Difference]: Start difference. First operand 67818 states and 74457 transitions. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:04,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:04,487 INFO L93 Difference]: Finished difference Result 139463 states and 153018 transitions. [2022-07-13 13:14:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:14:04,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 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 424 [2022-07-13 13:14:04,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:04,561 INFO L225 Difference]: With dead ends: 139463 [2022-07-13 13:14:04,562 INFO L226 Difference]: Without dead ends: 71647 [2022-07-13 13:14:04,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:04,599 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 358 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:04,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 349 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:14:04,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71647 states. [2022-07-13 13:14:05,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71647 to 70791. [2022-07-13 13:14:05,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70791 states, 70790 states have (on average 1.09598813391722) internal successors, (77585), 70790 states have internal predecessors, (77585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:05,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70791 states to 70791 states and 77585 transitions. [2022-07-13 13:14:05,555 INFO L78 Accepts]: Start accepts. Automaton has 70791 states and 77585 transitions. Word has length 424 [2022-07-13 13:14:05,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:05,555 INFO L495 AbstractCegarLoop]: Abstraction has 70791 states and 77585 transitions. [2022-07-13 13:14:05,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:05,555 INFO L276 IsEmpty]: Start isEmpty. Operand 70791 states and 77585 transitions. [2022-07-13 13:14:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-07-13 13:14:05,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:05,567 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 13:14:05,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 13:14:05,567 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:05,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:05,568 INFO L85 PathProgramCache]: Analyzing trace with hash 186174739, now seen corresponding path program 1 times [2022-07-13 13:14:05,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:05,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619380632] [2022-07-13 13:14:05,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:05,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 423 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-07-13 13:14:05,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:05,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619380632] [2022-07-13 13:14:05,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619380632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:05,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:05,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:14:05,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881645594] [2022-07-13 13:14:05,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:05,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:14:05,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:05,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:14:05,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:05,910 INFO L87 Difference]: Start difference. First operand 70791 states and 77585 transitions. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:07,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:07,769 INFO L93 Difference]: Finished difference Result 148384 states and 162924 transitions. [2022-07-13 13:14:07,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:14:07,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 433 [2022-07-13 13:14:07,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:07,864 INFO L225 Difference]: With dead ends: 148384 [2022-07-13 13:14:07,864 INFO L226 Difference]: Without dead ends: 76741 [2022-07-13 13:14:07,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:07,900 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 448 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:07,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 611 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:14:07,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76741 states. [2022-07-13 13:14:08,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76741 to 66506. [2022-07-13 13:14:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66506 states, 66505 states have (on average 1.0966694233516276) internal successors, (72934), 66505 states have internal predecessors, (72934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:08,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66506 states to 66506 states and 72934 transitions. [2022-07-13 13:14:08,941 INFO L78 Accepts]: Start accepts. Automaton has 66506 states and 72934 transitions. Word has length 433 [2022-07-13 13:14:08,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:08,942 INFO L495 AbstractCegarLoop]: Abstraction has 66506 states and 72934 transitions. [2022-07-13 13:14:08,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:08,942 INFO L276 IsEmpty]: Start isEmpty. Operand 66506 states and 72934 transitions. [2022-07-13 13:14:08,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-07-13 13:14:08,952 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:08,953 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:14:08,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 13:14:08,953 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:08,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:08,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1324595424, now seen corresponding path program 1 times [2022-07-13 13:14:08,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:08,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489683114] [2022-07-13 13:14:08,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:08,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 382 proven. 56 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-07-13 13:14:09,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:09,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489683114] [2022-07-13 13:14:09,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489683114] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:14:09,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000278206] [2022-07-13 13:14:09,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:09,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:14:09,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:14:09,148 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:14:09,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 13:14:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:09,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 13:14:09,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:14:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 441 proven. 82 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-07-13 13:14:09,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:14:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 441 proven. 82 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-07-13 13:14:10,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000278206] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 13:14:10,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 13:14:10,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-07-13 13:14:10,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756985671] [2022-07-13 13:14:10,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 13:14:10,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 13:14:10,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:10,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 13:14:10,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-13 13:14:10,565 INFO L87 Difference]: Start difference. First operand 66506 states and 72934 transitions. Second operand has 9 states, 9 states have (on average 83.66666666666667) internal successors, (753), 9 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:23,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:23,982 INFO L93 Difference]: Finished difference Result 180301 states and 197151 transitions. [2022-07-13 13:14:23,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 13:14:23,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 83.66666666666667) internal successors, (753), 9 states have internal predecessors, (753), 0 states have call successors, (0), 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 438 [2022-07-13 13:14:23,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:24,132 INFO L225 Difference]: With dead ends: 180301 [2022-07-13 13:14:24,132 INFO L226 Difference]: Without dead ends: 112947 [2022-07-13 13:14:24,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 909 GetRequests, 887 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2022-07-13 13:14:24,179 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 9503 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 15722 mSolverCounterSat, 1999 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9503 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 17721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1999 IncrementalHoareTripleChecker+Valid, 15722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:24,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9503 Valid, 490 Invalid, 17721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1999 Valid, 15722 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2022-07-13 13:14:24,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112947 states. [2022-07-13 13:14:25,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112947 to 97577. [2022-07-13 13:14:25,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97577 states, 97576 states have (on average 1.08705009428548) internal successors, (106070), 97576 states have internal predecessors, (106070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:25,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97577 states to 97577 states and 106070 transitions. [2022-07-13 13:14:25,558 INFO L78 Accepts]: Start accepts. Automaton has 97577 states and 106070 transitions. Word has length 438 [2022-07-13 13:14:25,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:25,558 INFO L495 AbstractCegarLoop]: Abstraction has 97577 states and 106070 transitions. [2022-07-13 13:14:25,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 83.66666666666667) internal successors, (753), 9 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:25,558 INFO L276 IsEmpty]: Start isEmpty. Operand 97577 states and 106070 transitions. [2022-07-13 13:14:25,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2022-07-13 13:14:25,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:25,567 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:14:25,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 13:14:25,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 13:14:25,780 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:25,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:25,780 INFO L85 PathProgramCache]: Analyzing trace with hash 515143898, now seen corresponding path program 1 times [2022-07-13 13:14:25,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:25,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340933] [2022-07-13 13:14:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:25,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:14:26,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:26,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340933] [2022-07-13 13:14:26,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340933] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:26,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:26,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:14:26,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498851587] [2022-07-13 13:14:26,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:26,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:14:26,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:26,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:14:26,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:14:26,025 INFO L87 Difference]: Start difference. First operand 97577 states and 106070 transitions. Second operand has 4 states, 4 states have (on average 117.75) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:28,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:28,808 INFO L93 Difference]: Finished difference Result 107819 states and 116831 transitions. [2022-07-13 13:14:28,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:14:28,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 117.75) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 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 471 [2022-07-13 13:14:28,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:28,937 INFO L225 Difference]: With dead ends: 107819 [2022-07-13 13:14:28,937 INFO L226 Difference]: Without dead ends: 107392 [2022-07-13 13:14:28,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:14:28,972 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 428 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 2303 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 2428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:28,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 301 Invalid, 2428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2303 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-13 13:14:29,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107392 states. [2022-07-13 13:14:29,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107392 to 97577. [2022-07-13 13:14:29,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97577 states, 97576 states have (on average 1.087039845863737) internal successors, (106069), 97576 states have internal predecessors, (106069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97577 states to 97577 states and 106069 transitions. [2022-07-13 13:14:30,073 INFO L78 Accepts]: Start accepts. Automaton has 97577 states and 106069 transitions. Word has length 471 [2022-07-13 13:14:30,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:30,073 INFO L495 AbstractCegarLoop]: Abstraction has 97577 states and 106069 transitions. [2022-07-13 13:14:30,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.75) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:30,074 INFO L276 IsEmpty]: Start isEmpty. Operand 97577 states and 106069 transitions. [2022-07-13 13:14:30,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-07-13 13:14:30,082 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:30,082 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 13:14:30,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 13:14:30,082 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:30,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:30,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1587292591, now seen corresponding path program 1 times [2022-07-13 13:14:30,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:30,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460045344] [2022-07-13 13:14:30,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:30,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 367 proven. 0 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2022-07-13 13:14:30,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:30,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460045344] [2022-07-13 13:14:30,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460045344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:30,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:30,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:14:30,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895004613] [2022-07-13 13:14:30,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:30,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:14:30,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:30,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:14:30,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:30,284 INFO L87 Difference]: Start difference. First operand 97577 states and 106069 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:31,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:31,526 INFO L93 Difference]: Finished difference Result 188335 states and 204404 transitions. [2022-07-13 13:14:31,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:14:31,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 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 487 [2022-07-13 13:14:31,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:31,628 INFO L225 Difference]: With dead ends: 188335 [2022-07-13 13:14:31,628 INFO L226 Difference]: Without dead ends: 91609 [2022-07-13 13:14:31,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:31,689 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 588 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:31,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 94 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 13:14:31,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91609 states. [2022-07-13 13:14:32,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91609 to 91592. [2022-07-13 13:14:32,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91592 states, 91591 states have (on average 1.0825299428983197) internal successors, (99150), 91591 states have internal predecessors, (99150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:32,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91592 states to 91592 states and 99150 transitions. [2022-07-13 13:14:32,840 INFO L78 Accepts]: Start accepts. Automaton has 91592 states and 99150 transitions. Word has length 487 [2022-07-13 13:14:32,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:32,840 INFO L495 AbstractCegarLoop]: Abstraction has 91592 states and 99150 transitions. [2022-07-13 13:14:32,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:32,841 INFO L276 IsEmpty]: Start isEmpty. Operand 91592 states and 99150 transitions. [2022-07-13 13:14:32,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2022-07-13 13:14:32,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:32,854 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-13 13:14:32,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 13:14:32,854 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:32,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:32,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1062405964, now seen corresponding path program 1 times [2022-07-13 13:14:32,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:32,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240451659] [2022-07-13 13:14:32,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:32,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-13 13:14:33,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:33,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240451659] [2022-07-13 13:14:33,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240451659] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:33,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:33,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:14:33,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430743401] [2022-07-13 13:14:33,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:33,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:14:33,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:33,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:14:33,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:33,072 INFO L87 Difference]: Start difference. First operand 91592 states and 99150 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:36,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:36,687 INFO L93 Difference]: Finished difference Result 181052 states and 196042 transitions. [2022-07-13 13:14:36,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:14:36,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 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 501 [2022-07-13 13:14:36,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:36,791 INFO L225 Difference]: With dead ends: 181052 [2022-07-13 13:14:36,791 INFO L226 Difference]: Without dead ends: 90311 [2022-07-13 13:14:36,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:36,845 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 431 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:36,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 686 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:14:36,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90311 states. [2022-07-13 13:14:38,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90311 to 88609. [2022-07-13 13:14:38,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88609 states, 88608 states have (on average 1.0687861141206212) internal successors, (94703), 88608 states have internal predecessors, (94703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88609 states to 88609 states and 94703 transitions. [2022-07-13 13:14:38,137 INFO L78 Accepts]: Start accepts. Automaton has 88609 states and 94703 transitions. Word has length 501 [2022-07-13 13:14:38,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:38,137 INFO L495 AbstractCegarLoop]: Abstraction has 88609 states and 94703 transitions. [2022-07-13 13:14:38,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:38,137 INFO L276 IsEmpty]: Start isEmpty. Operand 88609 states and 94703 transitions. [2022-07-13 13:14:38,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-07-13 13:14:38,147 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:38,147 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:14:38,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 13:14:38,147 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:38,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:38,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1384033671, now seen corresponding path program 1 times [2022-07-13 13:14:38,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:38,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197415673] [2022-07-13 13:14:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:38,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2022-07-13 13:14:38,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:38,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197415673] [2022-07-13 13:14:38,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197415673] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:38,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:38,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:14:38,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697396833] [2022-07-13 13:14:38,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:38,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:14:38,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:38,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:14:38,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:38,311 INFO L87 Difference]: Start difference. First operand 88609 states and 94703 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:40,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:40,559 INFO L93 Difference]: Finished difference Result 184892 states and 197657 transitions. [2022-07-13 13:14:40,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:14:40,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 507 [2022-07-13 13:14:40,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:40,669 INFO L225 Difference]: With dead ends: 184892 [2022-07-13 13:14:40,669 INFO L226 Difference]: Without dead ends: 95429 [2022-07-13 13:14:40,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:40,720 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 390 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:40,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 764 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:14:40,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95429 states. [2022-07-13 13:14:41,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95429 to 91153. [2022-07-13 13:14:41,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91153 states, 91152 states have (on average 1.066449447077409) internal successors, (97209), 91152 states have internal predecessors, (97209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91153 states to 91153 states and 97209 transitions. [2022-07-13 13:14:41,993 INFO L78 Accepts]: Start accepts. Automaton has 91153 states and 97209 transitions. Word has length 507 [2022-07-13 13:14:41,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:41,993 INFO L495 AbstractCegarLoop]: Abstraction has 91153 states and 97209 transitions. [2022-07-13 13:14:41,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:41,993 INFO L276 IsEmpty]: Start isEmpty. Operand 91153 states and 97209 transitions. [2022-07-13 13:14:42,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2022-07-13 13:14:42,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:42,006 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:14:42,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 13:14:42,006 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:42,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:42,007 INFO L85 PathProgramCache]: Analyzing trace with hash 18735335, now seen corresponding path program 1 times [2022-07-13 13:14:42,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:42,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673881821] [2022-07-13 13:14:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:42,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:42,238 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 488 proven. 56 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-13 13:14:42,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:42,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673881821] [2022-07-13 13:14:42,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673881821] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:14:42,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279614266] [2022-07-13 13:14:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:42,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:14:42,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:14:42,244 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:14:42,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 13:14:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:42,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 13:14:42,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:14:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked. [2022-07-13 13:14:42,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:14:42,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279614266] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:42,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:14:42,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-07-13 13:14:42,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845986481] [2022-07-13 13:14:42,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:42,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:14:42,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:42,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:14:42,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:14:42,709 INFO L87 Difference]: Start difference. First operand 91153 states and 97209 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:44,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:44,344 INFO L93 Difference]: Finished difference Result 92438 states and 98531 transitions. [2022-07-13 13:14:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:14:44,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 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 574 [2022-07-13 13:14:44,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:44,435 INFO L225 Difference]: With dead ends: 92438 [2022-07-13 13:14:44,435 INFO L226 Difference]: Without dead ends: 92011 [2022-07-13 13:14:44,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 574 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:14:44,463 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 416 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:44,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 287 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:14:44,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92011 states. [2022-07-13 13:14:45,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92011 to 91153. [2022-07-13 13:14:45,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91153 states, 91152 states have (on average 1.0659338248200807) internal successors, (97162), 91152 states have internal predecessors, (97162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:45,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91153 states to 91153 states and 97162 transitions. [2022-07-13 13:14:45,559 INFO L78 Accepts]: Start accepts. Automaton has 91153 states and 97162 transitions. Word has length 574 [2022-07-13 13:14:45,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:45,559 INFO L495 AbstractCegarLoop]: Abstraction has 91153 states and 97162 transitions. [2022-07-13 13:14:45,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:45,560 INFO L276 IsEmpty]: Start isEmpty. Operand 91153 states and 97162 transitions. [2022-07-13 13:14:45,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2022-07-13 13:14:45,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:45,573 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:14:45,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 13:14:45,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:14:45,775 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:45,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:45,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1727057822, now seen corresponding path program 1 times [2022-07-13 13:14:45,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:45,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872853268] [2022-07-13 13:14:45,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:45,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 847 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-13 13:14:45,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:45,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872853268] [2022-07-13 13:14:45,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872853268] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:45,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:45,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:14:45,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725158601] [2022-07-13 13:14:45,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:45,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:14:45,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:45,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:14:45,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:14:45,979 INFO L87 Difference]: Start difference. First operand 91153 states and 97162 transitions. Second operand has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:49,126 INFO L93 Difference]: Finished difference Result 205288 states and 218825 transitions. [2022-07-13 13:14:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:14:49,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 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 598 [2022-07-13 13:14:49,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:49,279 INFO L225 Difference]: With dead ends: 205288 [2022-07-13 13:14:49,279 INFO L226 Difference]: Without dead ends: 114987 [2022-07-13 13:14:49,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:14:49,319 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 728 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2260 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 2702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 2260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:49,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 183 Invalid, 2702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 2260 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-13 13:14:49,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114987 states.