./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label12.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label12.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa --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 6527eed8ae625274c5a4f237cc1c724f312a2d824fa69cbfc4381a7c8bc46d7c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:17:19,605 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:17:19,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:17:19,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:17:19,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:17:19,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:17:19,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:17:19,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:17:19,646 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:17:19,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:17:19,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:17:19,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:17:19,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:17:19,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:17:19,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:17:19,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:17:19,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:17:19,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:17:19,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:17:19,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:17:19,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:17:19,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:17:19,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:17:19,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:17:19,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:17:19,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:17:19,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:17:19,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:17:19,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:17:19,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:17:19,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:17:19,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:17:19,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:17:19,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:17:19,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:17:19,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:17:19,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:17:19,679 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:17:19,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:17:19,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:17:19,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:17:19,681 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:17:19,704 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:17:19,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:17:19,704 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:17:19,705 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:17:19,705 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:17:19,705 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:17:19,706 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:17:19,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:17:19,706 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:17:19,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:17:19,707 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:17:19,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:17:19,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:17:19,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:17:19,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:17:19,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:17:19,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:17:19,708 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:17:19,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:17:19,713 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:17:19,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:17:19,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:17:19,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:17:19,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:17:19,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:17:19,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:17:19,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:17:19,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:17:19,715 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:17:19,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:17:19,715 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:17:19,715 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:17:19,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:17:19,716 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:17:19,716 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6527eed8ae625274c5a4f237cc1c724f312a2d824fa69cbfc4381a7c8bc46d7c [2021-12-06 20:17:19,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:17:19,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:17:19,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:17:19,913 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:17:19,913 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:17:19,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem17_label12.c [2021-12-06 20:17:19,956 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/data/591b734a5/d275096ec9784b1e8d46f8020f9bdd2a/FLAG18ceedbbb [2021-12-06 20:17:20,488 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:17:20,489 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/sv-benchmarks/c/eca-rers2012/Problem17_label12.c [2021-12-06 20:17:20,511 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/data/591b734a5/d275096ec9784b1e8d46f8020f9bdd2a/FLAG18ceedbbb [2021-12-06 20:17:20,992 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/data/591b734a5/d275096ec9784b1e8d46f8020f9bdd2a [2021-12-06 20:17:20,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:17:20,996 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:17:20,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:17:20,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:17:21,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:17:21,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:17:20" (1/1) ... [2021-12-06 20:17:21,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c5873cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:17:21, skipping insertion in model container [2021-12-06 20:17:21,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:17:20" (1/1) ... [2021-12-06 20:17:21,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:17:21,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:17:21,221 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/sv-benchmarks/c/eca-rers2012/Problem17_label12.c[5027,5040] [2021-12-06 20:17:21,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:17:21,641 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:17:21,656 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/sv-benchmarks/c/eca-rers2012/Problem17_label12.c[5027,5040] [2021-12-06 20:17:21,898 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:17:21,911 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:17:21,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:17:21 WrapperNode [2021-12-06 20:17:21,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:17:21,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:17:21,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:17:21,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:17:21,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:17:21" (1/1) ... [2021-12-06 20:17:21,950 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:17:21" (1/1) ... [2021-12-06 20:17:22,135 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-06 20:17:22,135 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:17:22,136 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:17:22,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:17:22,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:17:22,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:17:21" (1/1) ... [2021-12-06 20:17:22,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:17:21" (1/1) ... [2021-12-06 20:17:22,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:17:21" (1/1) ... [2021-12-06 20:17:22,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:17:21" (1/1) ... [2021-12-06 20:17:22,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:17:21" (1/1) ... [2021-12-06 20:17:22,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:17:21" (1/1) ... [2021-12-06 20:17:22,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:17:21" (1/1) ... [2021-12-06 20:17:22,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:17:22,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:17:22,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:17:22,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:17:22,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:17:21" (1/1) ... [2021-12-06 20:17:22,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:17:22,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:17:22,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:17:22,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:17:22,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:17:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:17:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:17:22,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:17:22,500 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:17:22,501 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:17:24,984 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:17:25,000 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:17:25,000 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 20:17:25,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:17:25 BoogieIcfgContainer [2021-12-06 20:17:25,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:17:25,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:17:25,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:17:25,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:17:25,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:17:20" (1/3) ... [2021-12-06 20:17:25,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f111eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:17:25, skipping insertion in model container [2021-12-06 20:17:25,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:17:21" (2/3) ... [2021-12-06 20:17:25,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f111eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:17:25, skipping insertion in model container [2021-12-06 20:17:25,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:17:25" (3/3) ... [2021-12-06 20:17:25,012 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label12.c [2021-12-06 20:17:25,017 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:17:25,017 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:17:25,061 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:17:25,067 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 20:17:25,067 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:17:25,093 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) [2021-12-06 20:17:25,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 20:17:25,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:17:25,101 INFO L514 BasicCegarLoop]: 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] [2021-12-06 20:17:25,102 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:17:25,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:17:25,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2113343065, now seen corresponding path program 1 times [2021-12-06 20:17:25,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:17:25,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612740126] [2021-12-06 20:17:25,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:17:25,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:17:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:17:25,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:17:25,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612740126] [2021-12-06 20:17:25,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612740126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:17:25,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:17:25,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:17:25,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893015395] [2021-12-06 20:17:25,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:17:25,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:17:25,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:17:25,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:17:25,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:17:25,300 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 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:27,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:17:27,683 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2021-12-06 20:17:27,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:17:27,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-12-06 20:17:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:17:27,704 INFO L225 Difference]: With dead ends: 1642 [2021-12-06 20:17:27,704 INFO L226 Difference]: Without dead ends: 975 [2021-12-06 20:17:27,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:17:27,712 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 457 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 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, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:17:27,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 20:17:27,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-12-06 20:17:27,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2021-12-06 20:17:27,787 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) [2021-12-06 20:17:27,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2021-12-06 20:17:27,791 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 33 [2021-12-06 20:17:27,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:17:27,791 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2021-12-06 20:17:27,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:27,792 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2021-12-06 20:17:27,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 20:17:27,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:17:27,796 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:17:27,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:17:27,796 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:17:27,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:17:27,797 INFO L85 PathProgramCache]: Analyzing trace with hash 435284012, now seen corresponding path program 1 times [2021-12-06 20:17:27,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:17:27,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503828273] [2021-12-06 20:17:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:17:27,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:17:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:17:27,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:17:27,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503828273] [2021-12-06 20:17:27,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503828273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:17:27,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:17:27,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:17:27,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796703922] [2021-12-06 20:17:27,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:17:27,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:17:27,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:17:27,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:17:27,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:17:27,944 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:30,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:17:30,009 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2021-12-06 20:17:30,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:17:30,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-12-06 20:17:30,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:17:30,020 INFO L225 Difference]: With dead ends: 2814 [2021-12-06 20:17:30,021 INFO L226 Difference]: Without dead ends: 1844 [2021-12-06 20:17:30,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:17:30,024 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 458 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 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, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:17:30,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 20:17:30,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-12-06 20:17:30,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2021-12-06 20:17:30,063 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) [2021-12-06 20:17:30,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2021-12-06 20:17:30,068 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 103 [2021-12-06 20:17:30,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:17:30,069 INFO L470 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2021-12-06 20:17:30,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:30,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2021-12-06 20:17:30,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 20:17:30,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:17:30,071 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:17:30,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:17:30,071 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:17:30,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:17:30,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1392867689, now seen corresponding path program 1 times [2021-12-06 20:17:30,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:17:30,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999977382] [2021-12-06 20:17:30,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:17:30,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:17:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:17:30,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:17:30,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999977382] [2021-12-06 20:17:30,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999977382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:17:30,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:17:30,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:17:30,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871333772] [2021-12-06 20:17:30,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:17:30,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:17:30,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:17:30,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:17:30,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:17:30,157 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:31,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:17:31,838 INFO L93 Difference]: Finished difference Result 5395 states and 7326 transitions. [2021-12-06 20:17:31,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:17:31,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-12-06 20:17:31,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:17:31,848 INFO L225 Difference]: With dead ends: 5395 [2021-12-06 20:17:31,848 INFO L226 Difference]: Without dead ends: 2701 [2021-12-06 20:17:31,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:17:31,852 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 368 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:17:31,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 20:17:31,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-12-06 20:17:31,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2701. [2021-12-06 20:17:31,891 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) [2021-12-06 20:17:31,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 3218 transitions. [2021-12-06 20:17:31,896 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 3218 transitions. Word has length 125 [2021-12-06 20:17:31,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:17:31,896 INFO L470 AbstractCegarLoop]: Abstraction has 2701 states and 3218 transitions. [2021-12-06 20:17:31,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:31,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 3218 transitions. [2021-12-06 20:17:31,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-06 20:17:31,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:17:31,900 INFO L514 BasicCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 20:17:31,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 20:17:31,900 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:17:31,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:17:31,901 INFO L85 PathProgramCache]: Analyzing trace with hash -165152522, now seen corresponding path program 1 times [2021-12-06 20:17:31,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:17:31,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947435895] [2021-12-06 20:17:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:17:31,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:17:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:31,999 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:17:32,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:17:32,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947435895] [2021-12-06 20:17:32,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947435895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:17:32,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:17:32,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:17:32,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306627682] [2021-12-06 20:17:32,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:17:32,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:17:32,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:17:32,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:17:32,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:17:32,002 INFO L87 Difference]: Start difference. First operand 2701 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:33,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:17:33,476 INFO L93 Difference]: Finished difference Result 7108 states and 8598 transitions. [2021-12-06 20:17:33,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:17:33,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 185 [2021-12-06 20:17:33,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:17:33,492 INFO L225 Difference]: With dead ends: 7108 [2021-12-06 20:17:33,493 INFO L226 Difference]: Without dead ends: 4409 [2021-12-06 20:17:33,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:17:33,497 INFO L933 BasicCegarLoop]: 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 [2021-12-06 20:17:33,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 20:17:33,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2021-12-06 20:17:33,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 4409. [2021-12-06 20:17:33,559 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) [2021-12-06 20:17:33,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 5160 transitions. [2021-12-06 20:17:33,566 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 5160 transitions. Word has length 185 [2021-12-06 20:17:33,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:17:33,567 INFO L470 AbstractCegarLoop]: Abstraction has 4409 states and 5160 transitions. [2021-12-06 20:17:33,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:33,567 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 5160 transitions. [2021-12-06 20:17:33,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-06 20:17:33,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:17:33,570 INFO L514 BasicCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 20:17:33,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 20:17:33,571 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:17:33,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:17:33,571 INFO L85 PathProgramCache]: Analyzing trace with hash -271732261, now seen corresponding path program 1 times [2021-12-06 20:17:33,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:17:33,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906793029] [2021-12-06 20:17:33,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:17:33,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:17:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 20:17:33,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:17:33,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906793029] [2021-12-06 20:17:33,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906793029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:17:33,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:17:33,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:17:33,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025665681] [2021-12-06 20:17:33,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:17:33,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:17:33,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:17:33,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:17:33,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:17:33,671 INFO L87 Difference]: Start difference. First operand 4409 states and 5160 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:35,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:17:35,328 INFO L93 Difference]: Finished difference Result 10936 states and 12970 transitions. [2021-12-06 20:17:35,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:17:35,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-12-06 20:17:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:17:35,350 INFO L225 Difference]: With dead ends: 10936 [2021-12-06 20:17:35,350 INFO L226 Difference]: Without dead ends: 6528 [2021-12-06 20:17:35,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:17:35,355 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 418 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 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 [2021-12-06 20:17:35,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 20:17:35,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2021-12-06 20:17:35,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 4382. [2021-12-06 20:17:35,415 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) [2021-12-06 20:17:35,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 5119 transitions. [2021-12-06 20:17:35,422 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 5119 transitions. Word has length 187 [2021-12-06 20:17:35,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:17:35,423 INFO L470 AbstractCegarLoop]: Abstraction has 4382 states and 5119 transitions. [2021-12-06 20:17:35,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:35,423 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 5119 transitions. [2021-12-06 20:17:35,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-12-06 20:17:35,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:17:35,426 INFO L514 BasicCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 20:17:35,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 20:17:35,426 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:17:35,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:17:35,427 INFO L85 PathProgramCache]: Analyzing trace with hash -386675243, now seen corresponding path program 1 times [2021-12-06 20:17:35,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:17:35,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090955372] [2021-12-06 20:17:35,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:17:35,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:17:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-06 20:17:35,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:17:35,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090955372] [2021-12-06 20:17:35,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090955372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:17:35,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:17:35,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:17:35,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614609443] [2021-12-06 20:17:35,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:17:35,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:17:35,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:17:35,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:17:35,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:17:35,519 INFO L87 Difference]: Start difference. First operand 4382 states and 5119 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:37,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:17:37,326 INFO L93 Difference]: Finished difference Result 10045 states and 11706 transitions. [2021-12-06 20:17:37,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:17:37,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 253 [2021-12-06 20:17:37,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:17:37,346 INFO L225 Difference]: With dead ends: 10045 [2021-12-06 20:17:37,346 INFO L226 Difference]: Without dead ends: 5665 [2021-12-06 20:17:37,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:17:37,349 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 403 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 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, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:17:37,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 894 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 20:17:37,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2021-12-06 20:17:37,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5234. [2021-12-06 20:17:37,403 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) [2021-12-06 20:17:37,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 6064 transitions. [2021-12-06 20:17:37,411 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 6064 transitions. Word has length 253 [2021-12-06 20:17:37,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:17:37,411 INFO L470 AbstractCegarLoop]: Abstraction has 5234 states and 6064 transitions. [2021-12-06 20:17:37,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 6064 transitions. [2021-12-06 20:17:37,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-12-06 20:17:37,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:17:37,414 INFO L514 BasicCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:17:37,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 20:17:37,415 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:17:37,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:17:37,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2040583175, now seen corresponding path program 1 times [2021-12-06 20:17:37,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:17:37,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730936181] [2021-12-06 20:17:37,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:17:37,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:17:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 20:17:37,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:17:37,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730936181] [2021-12-06 20:17:37,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730936181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:17:37,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:17:37,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:17:37,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267809825] [2021-12-06 20:17:37,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:17:37,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:17:37,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:17:37,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:17:37,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:17:37,504 INFO L87 Difference]: Start difference. First operand 5234 states and 6064 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:39,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:17:39,658 INFO L93 Difference]: Finished difference Result 13049 states and 15222 transitions. [2021-12-06 20:17:39,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:17:39,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 265 [2021-12-06 20:17:39,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:17:39,683 INFO L225 Difference]: With dead ends: 13049 [2021-12-06 20:17:39,683 INFO L226 Difference]: Without dead ends: 6942 [2021-12-06 20:17:39,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:17:39,687 INFO L933 BasicCegarLoop]: 586 mSDtfsCounter, 493 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:17:39,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 630 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 20:17:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6942 states. [2021-12-06 20:17:39,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6942 to 6512. [2021-12-06 20:17:39,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6512 states, 6511 states have (on average 1.1520503762862848) internal successors, (7501), 6511 states have internal predecessors, (7501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:39,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6512 states to 6512 states and 7501 transitions. [2021-12-06 20:17:39,758 INFO L78 Accepts]: Start accepts. Automaton has 6512 states and 7501 transitions. Word has length 265 [2021-12-06 20:17:39,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:17:39,758 INFO L470 AbstractCegarLoop]: Abstraction has 6512 states and 7501 transitions. [2021-12-06 20:17:39,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:39,759 INFO L276 IsEmpty]: Start isEmpty. Operand 6512 states and 7501 transitions. [2021-12-06 20:17:39,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-12-06 20:17:39,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:17:39,762 INFO L514 BasicCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:17:39,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 20:17:39,763 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:17:39,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:17:39,763 INFO L85 PathProgramCache]: Analyzing trace with hash -455120796, now seen corresponding path program 1 times [2021-12-06 20:17:39,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:17:39,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199351037] [2021-12-06 20:17:39,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:17:39,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:17:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:39,865 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-06 20:17:39,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:17:39,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199351037] [2021-12-06 20:17:39,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199351037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:17:39,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:17:39,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:17:39,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616725432] [2021-12-06 20:17:39,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:17:39,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:17:39,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:17:39,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:17:39,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:17:39,867 INFO L87 Difference]: Start difference. First operand 6512 states and 7501 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:41,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:17:41,359 INFO L93 Difference]: Finished difference Result 16010 states and 18477 transitions. [2021-12-06 20:17:41,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:17:41,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 288 [2021-12-06 20:17:41,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:17:41,374 INFO L225 Difference]: With dead ends: 16010 [2021-12-06 20:17:41,374 INFO L226 Difference]: Without dead ends: 9500 [2021-12-06 20:17:41,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:17:41,380 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 416 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:17:41,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 337 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 20:17:41,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9500 states. [2021-12-06 20:17:41,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9500 to 8644. [2021-12-06 20:17:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8644 states, 8643 states have (on average 1.1545759574221914) internal successors, (9979), 8643 states have internal predecessors, (9979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:41,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8644 states to 8644 states and 9979 transitions. [2021-12-06 20:17:41,474 INFO L78 Accepts]: Start accepts. Automaton has 8644 states and 9979 transitions. Word has length 288 [2021-12-06 20:17:41,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:17:41,474 INFO L470 AbstractCegarLoop]: Abstraction has 8644 states and 9979 transitions. [2021-12-06 20:17:41,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:41,475 INFO L276 IsEmpty]: Start isEmpty. Operand 8644 states and 9979 transitions. [2021-12-06 20:17:41,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-12-06 20:17:41,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:17:41,478 INFO L514 BasicCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:17:41,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 20:17:41,478 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:17:41,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:17:41,478 INFO L85 PathProgramCache]: Analyzing trace with hash 777395375, now seen corresponding path program 1 times [2021-12-06 20:17:41,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:17:41,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71796189] [2021-12-06 20:17:41,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:17:41,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:17:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-06 20:17:41,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:17:41,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71796189] [2021-12-06 20:17:41,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71796189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:17:41,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:17:41,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:17:41,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189842775] [2021-12-06 20:17:41,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:17:41,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:17:41,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:17:41,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:17:41,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:17:41,574 INFO L87 Difference]: Start difference. First operand 8644 states and 9979 transitions. Second operand has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:44,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:17:44,553 INFO L93 Difference]: Finished difference Result 30559 states and 35506 transitions. [2021-12-06 20:17:44,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:17:44,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 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 293 [2021-12-06 20:17:44,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:17:44,577 INFO L225 Difference]: With dead ends: 30559 [2021-12-06 20:17:44,577 INFO L226 Difference]: Without dead ends: 21062 [2021-12-06 20:17:44,585 INFO L932 BasicCegarLoop]: 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 [2021-12-06 20:17:44,585 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 890 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2493 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 2951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 2493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:17:44,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 241 Invalid, 2951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 2493 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-06 20:17:44,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21062 states. [2021-12-06 20:17:44,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21062 to 21022. [2021-12-06 20:17:44,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21022 states, 21021 states have (on average 1.142286285143428) internal successors, (24012), 21021 states have internal predecessors, (24012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:44,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21022 states to 21022 states and 24012 transitions. [2021-12-06 20:17:44,775 INFO L78 Accepts]: Start accepts. Automaton has 21022 states and 24012 transitions. Word has length 293 [2021-12-06 20:17:44,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:17:44,775 INFO L470 AbstractCegarLoop]: Abstraction has 21022 states and 24012 transitions. [2021-12-06 20:17:44,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:44,775 INFO L276 IsEmpty]: Start isEmpty. Operand 21022 states and 24012 transitions. [2021-12-06 20:17:44,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-06 20:17:44,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:17:44,779 INFO L514 BasicCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 20:17:44,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 20:17:44,779 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:17:44,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:17:44,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1748178961, now seen corresponding path program 1 times [2021-12-06 20:17:44,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:17:44,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517545661] [2021-12-06 20:17:44,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:17:44,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:17:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 256 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:17:44,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:17:44,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517545661] [2021-12-06 20:17:44,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517545661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:17:44,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345931243] [2021-12-06 20:17:44,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:17:44,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:17:44,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:17:44,894 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:17:44,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:17:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:45,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 20:17:45,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:17:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 248 proven. 82 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 20:17:45,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:17:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 248 proven. 82 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 20:17:46,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345931243] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:17:46,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:17:46,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-12-06 20:17:46,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638161359] [2021-12-06 20:17:46,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:17:46,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 20:17:46,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:17:46,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 20:17:46,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:17:46,601 INFO L87 Difference]: Start difference. First operand 21022 states and 24012 transitions. Second operand has 9 states, 9 states have (on average 90.44444444444444) internal successors, (814), 9 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:00,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:18:00,210 INFO L93 Difference]: Finished difference Result 92412 states and 105636 transitions. [2021-12-06 20:18:00,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 20:18:00,210 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 90.44444444444444) internal successors, (814), 9 states have internal predecessors, (814), 0 states have call successors, (0), 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 328 [2021-12-06 20:18:00,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:18:00,281 INFO L225 Difference]: With dead ends: 92412 [2021-12-06 20:18:00,281 INFO L226 Difference]: Without dead ends: 67985 [2021-12-06 20:18:00,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-12-06 20:18:00,303 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 7049 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 12945 mSolverCounterSat, 2773 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7049 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 15718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2773 IncrementalHoareTripleChecker+Valid, 12945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:18:00,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7049 Valid, 510 Invalid, 15718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2773 Valid, 12945 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2021-12-06 20:18:00,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67985 states. [2021-12-06 20:18:00,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67985 to 53386. [2021-12-06 20:18:00,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53386 states, 53385 states have (on average 1.1439355624239018) internal successors, (61069), 53385 states have internal predecessors, (61069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:00,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53386 states to 53386 states and 61069 transitions. [2021-12-06 20:18:00,916 INFO L78 Accepts]: Start accepts. Automaton has 53386 states and 61069 transitions. Word has length 328 [2021-12-06 20:18:00,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:18:00,916 INFO L470 AbstractCegarLoop]: Abstraction has 53386 states and 61069 transitions. [2021-12-06 20:18:00,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 90.44444444444444) internal successors, (814), 9 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:00,958 INFO L276 IsEmpty]: Start isEmpty. Operand 53386 states and 61069 transitions. [2021-12-06 20:18:00,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2021-12-06 20:18:00,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:18:00,998 INFO L514 BasicCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-06 20:18:01,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:18:01,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 20:18:01,199 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:18:01,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:18:01,200 INFO L85 PathProgramCache]: Analyzing trace with hash -147091403, now seen corresponding path program 1 times [2021-12-06 20:18:01,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:18:01,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831160715] [2021-12-06 20:18:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:01,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:18:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 456 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-06 20:18:01,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:18:01,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831160715] [2021-12-06 20:18:01,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831160715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:18:01,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:18:01,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:18:01,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225792079] [2021-12-06 20:18:01,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:18:01,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:18:01,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:01,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:18:01,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:18:01,326 INFO L87 Difference]: Start difference. First operand 53386 states and 61069 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:03,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:18:03,219 INFO L93 Difference]: Finished difference Result 119091 states and 136469 transitions. [2021-12-06 20:18:03,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:18:03,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 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 396 [2021-12-06 20:18:03,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:18:03,295 INFO L225 Difference]: With dead ends: 119091 [2021-12-06 20:18:03,295 INFO L226 Difference]: Without dead ends: 65707 [2021-12-06 20:18:03,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:18:03,319 INFO L933 BasicCegarLoop]: 724 mSDtfsCounter, 319 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:18:03,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 787 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 20:18:03,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65707 states. [2021-12-06 20:18:03,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65707 to 63582. [2021-12-06 20:18:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63582 states, 63581 states have (on average 1.114483886695711) internal successors, (70860), 63581 states have internal predecessors, (70860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63582 states to 63582 states and 70860 transitions. [2021-12-06 20:18:04,068 INFO L78 Accepts]: Start accepts. Automaton has 63582 states and 70860 transitions. Word has length 396 [2021-12-06 20:18:04,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:18:04,068 INFO L470 AbstractCegarLoop]: Abstraction has 63582 states and 70860 transitions. [2021-12-06 20:18:04,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:04,069 INFO L276 IsEmpty]: Start isEmpty. Operand 63582 states and 70860 transitions. [2021-12-06 20:18:04,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2021-12-06 20:18:04,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:18:04,076 INFO L514 BasicCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:18:04,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 20:18:04,076 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:18:04,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:18:04,076 INFO L85 PathProgramCache]: Analyzing trace with hash 749905159, now seen corresponding path program 1 times [2021-12-06 20:18:04,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:18:04,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384346247] [2021-12-06 20:18:04,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:04,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:18:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 526 proven. 80 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 20:18:04,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:18:04,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384346247] [2021-12-06 20:18:04,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384346247] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:18:04,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881041756] [2021-12-06 20:18:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:04,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:18:04,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:18:04,288 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:18:04,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:18:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:04,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:18:04,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:18:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 606 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 20:18:04,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:18:04,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881041756] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:18:04,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:18:04,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-12-06 20:18:04,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843910177] [2021-12-06 20:18:04,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:18:04,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:18:04,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:04,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:18:04,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:18:04,846 INFO L87 Difference]: Start difference. First operand 63582 states and 70860 transitions. Second operand has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:06,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:18:06,802 INFO L93 Difference]: Finished difference Result 127162 states and 141718 transitions. [2021-12-06 20:18:06,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:18:06,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 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 410 [2021-12-06 20:18:06,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:18:06,861 INFO L225 Difference]: With dead ends: 127162 [2021-12-06 20:18:06,861 INFO L226 Difference]: Without dead ends: 63582 [2021-12-06 20:18:06,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:18:06,884 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 825 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2068 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 2378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:18:06,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 314 Invalid, 2378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2068 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 20:18:06,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63582 states. [2021-12-06 20:18:07,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63582 to 63157. [2021-12-06 20:18:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63157 states, 63156 states have (on average 1.114161758186079) internal successors, (70366), 63156 states have internal predecessors, (70366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:07,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63157 states to 63157 states and 70366 transitions. [2021-12-06 20:18:07,661 INFO L78 Accepts]: Start accepts. Automaton has 63157 states and 70366 transitions. Word has length 410 [2021-12-06 20:18:07,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:18:07,662 INFO L470 AbstractCegarLoop]: Abstraction has 63157 states and 70366 transitions. [2021-12-06 20:18:07,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:07,662 INFO L276 IsEmpty]: Start isEmpty. Operand 63157 states and 70366 transitions. [2021-12-06 20:18:07,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-12-06 20:18:07,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:18:07,670 INFO L514 BasicCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-06 20:18:07,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:18:07,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 20:18:07,870 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:18:07,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:18:07,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1597446720, now seen corresponding path program 1 times [2021-12-06 20:18:07,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:18:07,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088294055] [2021-12-06 20:18:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:07,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:18:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 360 proven. 181 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-06 20:18:08,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:18:08,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088294055] [2021-12-06 20:18:08,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088294055] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:18:08,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577555775] [2021-12-06 20:18:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:08,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:18:08,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:18:08,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:18:08,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:18:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:08,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:18:08,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:18:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 542 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-06 20:18:08,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:18:08,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577555775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:18:08,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:18:08,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-12-06 20:18:08,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722156802] [2021-12-06 20:18:08,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:18:08,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:18:08,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:08,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:18:08,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:18:08,465 INFO L87 Difference]: Start difference. First operand 63157 states and 70366 transitions. Second operand has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:11,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:18:11,515 INFO L93 Difference]: Finished difference Result 163781 states and 182720 transitions. [2021-12-06 20:18:11,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:18:11,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 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 458 [2021-12-06 20:18:11,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:18:11,620 INFO L225 Difference]: With dead ends: 163781 [2021-12-06 20:18:11,620 INFO L226 Difference]: Without dead ends: 100626 [2021-12-06 20:18:11,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:18:11,652 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 762 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:18:11,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 180 Invalid, 2864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 20:18:11,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100626 states. [2021-12-06 20:18:12,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100626 to 98494. [2021-12-06 20:18:12,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98494 states, 98493 states have (on average 1.1112058724985532) internal successors, (109446), 98493 states have internal predecessors, (109446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:12,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98494 states to 98494 states and 109446 transitions. [2021-12-06 20:18:12,906 INFO L78 Accepts]: Start accepts. Automaton has 98494 states and 109446 transitions. Word has length 458 [2021-12-06 20:18:12,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:18:12,907 INFO L470 AbstractCegarLoop]: Abstraction has 98494 states and 109446 transitions. [2021-12-06 20:18:12,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:12,907 INFO L276 IsEmpty]: Start isEmpty. Operand 98494 states and 109446 transitions. [2021-12-06 20:18:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2021-12-06 20:18:12,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:18:12,922 INFO L514 BasicCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-06 20:18:12,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 20:18:13,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 20:18:13,125 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:18:13,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:18:13,126 INFO L85 PathProgramCache]: Analyzing trace with hash 487505026, now seen corresponding path program 1 times [2021-12-06 20:18:13,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:18:13,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502105234] [2021-12-06 20:18:13,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:13,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:18:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-12-06 20:18:13,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:18:13,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502105234] [2021-12-06 20:18:13,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502105234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:18:13,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:18:13,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:18:13,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330555928] [2021-12-06 20:18:13,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:18:13,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:18:13,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:13,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:18:13,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:18:13,307 INFO L87 Difference]: Start difference. First operand 98494 states and 109446 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:15,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:18:15,522 INFO L93 Difference]: Finished difference Result 202509 states and 224564 transitions. [2021-12-06 20:18:15,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:18:15,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 489 [2021-12-06 20:18:15,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:18:15,643 INFO L225 Difference]: With dead ends: 202509 [2021-12-06 20:18:15,643 INFO L226 Difference]: Without dead ends: 100174 [2021-12-06 20:18:15,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:18:15,697 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 487 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:18:15,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 642 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 20:18:15,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100174 states. [2021-12-06 20:18:16,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100174 to 90362. [2021-12-06 20:18:16,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90362 states, 90361 states have (on average 1.102931574462434) internal successors, (99662), 90361 states have internal predecessors, (99662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90362 states to 90362 states and 99662 transitions. [2021-12-06 20:18:16,792 INFO L78 Accepts]: Start accepts. Automaton has 90362 states and 99662 transitions. Word has length 489 [2021-12-06 20:18:16,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:18:16,792 INFO L470 AbstractCegarLoop]: Abstraction has 90362 states and 99662 transitions. [2021-12-06 20:18:16,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand 90362 states and 99662 transitions. [2021-12-06 20:18:16,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2021-12-06 20:18:16,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:18:16,804 INFO L514 BasicCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-06 20:18:16,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 20:18:16,804 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:18:16,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:18:16,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1948426311, now seen corresponding path program 1 times [2021-12-06 20:18:16,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:18:16,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608092622] [2021-12-06 20:18:16,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:16,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:18:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-12-06 20:18:16,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:18:16,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608092622] [2021-12-06 20:18:16,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608092622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:18:16,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:18:16,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:18:16,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635879324] [2021-12-06 20:18:16,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:18:16,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:18:16,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:16,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:18:16,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:18:16,924 INFO L87 Difference]: Start difference. First operand 90362 states and 99662 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:19,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:18:19,136 INFO L93 Difference]: Finished difference Result 199471 states and 220093 transitions. [2021-12-06 20:18:19,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:18:19,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 491 [2021-12-06 20:18:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:18:19,240 INFO L225 Difference]: With dead ends: 199471 [2021-12-06 20:18:19,240 INFO L226 Difference]: Without dead ends: 108686 [2021-12-06 20:18:19,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:18:19,263 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 458 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:18:19,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 638 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 20:18:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108686 states. [2021-12-06 20:18:20,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108686 to 103547. [2021-12-06 20:18:20,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103547 states, 103546 states have (on average 1.0940837888474688) internal successors, (113288), 103546 states have internal predecessors, (113288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:20,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103547 states to 103547 states and 113288 transitions. [2021-12-06 20:18:20,617 INFO L78 Accepts]: Start accepts. Automaton has 103547 states and 113288 transitions. Word has length 491 [2021-12-06 20:18:20,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:18:20,618 INFO L470 AbstractCegarLoop]: Abstraction has 103547 states and 113288 transitions. [2021-12-06 20:18:20,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:20,618 INFO L276 IsEmpty]: Start isEmpty. Operand 103547 states and 113288 transitions. [2021-12-06 20:18:20,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2021-12-06 20:18:20,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:18:20,633 INFO L514 BasicCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-12-06 20:18:20,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 20:18:20,633 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:18:20,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:18:20,633 INFO L85 PathProgramCache]: Analyzing trace with hash 330176941, now seen corresponding path program 1 times [2021-12-06 20:18:20,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:18:20,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163763845] [2021-12-06 20:18:20,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:20,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:18:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 390 proven. 0 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2021-12-06 20:18:20,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:18:20,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163763845] [2021-12-06 20:18:20,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163763845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:18:20,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:18:20,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:18:20,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622061825] [2021-12-06 20:18:20,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:18:20,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:18:20,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:20,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:18:20,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:18:20,782 INFO L87 Difference]: Start difference. First operand 103547 states and 113288 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:22,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:18:22,341 INFO L93 Difference]: Finished difference Result 200692 states and 219132 transitions. [2021-12-06 20:18:22,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:18:22,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 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 493 [2021-12-06 20:18:22,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:18:22,438 INFO L225 Difference]: With dead ends: 200692 [2021-12-06 20:18:22,438 INFO L226 Difference]: Without dead ends: 97143 [2021-12-06 20:18:22,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:18:22,480 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 604 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:18:22,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 94 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 20:18:22,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97143 states. [2021-12-06 20:18:23,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97143 to 95850. [2021-12-06 20:18:23,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95850 states, 95849 states have (on average 1.088514225500527) internal successors, (104333), 95849 states have internal predecessors, (104333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95850 states to 95850 states and 104333 transitions. [2021-12-06 20:18:23,531 INFO L78 Accepts]: Start accepts. Automaton has 95850 states and 104333 transitions. Word has length 493 [2021-12-06 20:18:23,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:18:23,532 INFO L470 AbstractCegarLoop]: Abstraction has 95850 states and 104333 transitions. [2021-12-06 20:18:23,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:23,532 INFO L276 IsEmpty]: Start isEmpty. Operand 95850 states and 104333 transitions. [2021-12-06 20:18:23,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2021-12-06 20:18:23,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:18:23,549 INFO L514 BasicCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 20:18:23,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 20:18:23,550 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:18:23,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:18:23,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1800177179, now seen corresponding path program 1 times [2021-12-06 20:18:23,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:18:23,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355658103] [2021-12-06 20:18:23,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:23,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:18:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 771 proven. 72 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-06 20:18:23,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:18:23,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355658103] [2021-12-06 20:18:23,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355658103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:18:23,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533142421] [2021-12-06 20:18:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:23,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:18:23,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:18:23,705 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:18:23,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:18:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:23,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:18:23,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:18:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 843 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-06 20:18:24,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:18:24,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533142421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:18:24,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:18:24,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-12-06 20:18:24,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947756760] [2021-12-06 20:18:24,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:18:24,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:18:24,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:24,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:18:24,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:18:24,345 INFO L87 Difference]: Start difference. First operand 95850 states and 104333 transitions. Second operand has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:26,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:18:26,640 INFO L93 Difference]: Finished difference Result 194684 states and 211809 transitions. [2021-12-06 20:18:26,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:18:26,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 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 564 [2021-12-06 20:18:26,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:18:26,740 INFO L225 Difference]: With dead ends: 194684 [2021-12-06 20:18:26,741 INFO L226 Difference]: Without dead ends: 98836 [2021-12-06 20:18:26,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:18:26,782 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 845 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2026 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 2333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 2026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:18:26,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 264 Invalid, 2333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 2026 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 20:18:26,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98836 states. [2021-12-06 20:18:27,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98836 to 97985. [2021-12-06 20:18:27,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97985 states, 97984 states have (on average 1.0870856466361856) internal successors, (106517), 97984 states have internal predecessors, (106517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:27,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97985 states to 97985 states and 106517 transitions. [2021-12-06 20:18:27,934 INFO L78 Accepts]: Start accepts. Automaton has 97985 states and 106517 transitions. Word has length 564 [2021-12-06 20:18:27,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:18:27,935 INFO L470 AbstractCegarLoop]: Abstraction has 97985 states and 106517 transitions. [2021-12-06 20:18:27,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:27,935 INFO L276 IsEmpty]: Start isEmpty. Operand 97985 states and 106517 transitions. [2021-12-06 20:18:27,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2021-12-06 20:18:27,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:18:27,953 INFO L514 BasicCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:18:27,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 20:18:28,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:18:28,156 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:18:28,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:18:28,158 INFO L85 PathProgramCache]: Analyzing trace with hash -482078247, now seen corresponding path program 1 times [2021-12-06 20:18:28,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:18:28,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616610326] [2021-12-06 20:18:28,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:28,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:18:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 793 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-12-06 20:18:28,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:18:28,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616610326] [2021-12-06 20:18:28,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616610326] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:18:28,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:18:28,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:18:28,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772271788] [2021-12-06 20:18:28,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:18:28,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:18:28,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:28,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:18:28,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:18:28,353 INFO L87 Difference]: Start difference. First operand 97985 states and 106517 transitions. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:30,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:18:30,718 INFO L93 Difference]: Finished difference Result 209168 states and 227282 transitions. [2021-12-06 20:18:30,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:18:30,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 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 587 [2021-12-06 20:18:30,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:18:30,827 INFO L225 Difference]: With dead ends: 209168 [2021-12-06 20:18:30,827 INFO L226 Difference]: Without dead ends: 111185 [2021-12-06 20:18:30,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:18:30,845 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 322 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:18:30,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 763 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 20:18:30,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111185 states. [2021-12-06 20:18:31,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111185 to 106069. [2021-12-06 20:18:31,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106069 states, 106068 states have (on average 1.084936078741939) internal successors, (115077), 106068 states have internal predecessors, (115077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:32,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106069 states to 106069 states and 115077 transitions. [2021-12-06 20:18:32,045 INFO L78 Accepts]: Start accepts. Automaton has 106069 states and 115077 transitions. Word has length 587 [2021-12-06 20:18:32,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:18:32,045 INFO L470 AbstractCegarLoop]: Abstraction has 106069 states and 115077 transitions. [2021-12-06 20:18:32,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:32,045 INFO L276 IsEmpty]: Start isEmpty. Operand 106069 states and 115077 transitions. [2021-12-06 20:18:32,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2021-12-06 20:18:32,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:18:32,058 INFO L514 BasicCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-06 20:18:32,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 20:18:32,059 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:18:32,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:18:32,059 INFO L85 PathProgramCache]: Analyzing trace with hash 2099697401, now seen corresponding path program 1 times [2021-12-06 20:18:32,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:18:32,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421767383] [2021-12-06 20:18:32,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:32,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:18:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-06 20:18:32,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:18:32,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421767383] [2021-12-06 20:18:32,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421767383] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:18:32,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:18:32,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:18:32,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061935839] [2021-12-06 20:18:32,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:18:32,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:18:32,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:32,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:18:32,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:18:32,214 INFO L87 Difference]: Start difference. First operand 106069 states and 115077 transitions. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:34,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:18:34,202 INFO L93 Difference]: Finished difference Result 221515 states and 240940 transitions. [2021-12-06 20:18:34,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:18:34,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 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 595 [2021-12-06 20:18:34,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:18:34,319 INFO L225 Difference]: With dead ends: 221515 [2021-12-06 20:18:34,319 INFO L226 Difference]: Without dead ends: 115448 [2021-12-06 20:18:34,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:18:34,354 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 426 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:18:34,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 278 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 20:18:34,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115448 states. [2021-12-06 20:18:35,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115448 to 106932. [2021-12-06 20:18:35,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106932 states, 106931 states have (on average 1.087617248506046) internal successors, (116300), 106931 states have internal predecessors, (116300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:35,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106932 states to 106932 states and 116300 transitions. [2021-12-06 20:18:35,798 INFO L78 Accepts]: Start accepts. Automaton has 106932 states and 116300 transitions. Word has length 595 [2021-12-06 20:18:35,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:18:35,799 INFO L470 AbstractCegarLoop]: Abstraction has 106932 states and 116300 transitions. [2021-12-06 20:18:35,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:35,799 INFO L276 IsEmpty]: Start isEmpty. Operand 106932 states and 116300 transitions. [2021-12-06 20:18:35,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2021-12-06 20:18:35,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:18:35,812 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:18:35,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 20:18:35,812 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:18:35,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:18:35,813 INFO L85 PathProgramCache]: Analyzing trace with hash -961990347, now seen corresponding path program 1 times [2021-12-06 20:18:35,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:18:35,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846516297] [2021-12-06 20:18:35,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:35,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:18:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1465 backedges. 1051 proven. 0 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-12-06 20:18:35,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:18:35,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846516297] [2021-12-06 20:18:35,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846516297] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:18:35,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:18:35,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:18:35,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913421724] [2021-12-06 20:18:35,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:18:35,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:18:35,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:35,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:18:35,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:18:35,953 INFO L87 Difference]: Start difference. First operand 106932 states and 116300 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:38,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:18:38,039 INFO L93 Difference]: Finished difference Result 223220 states and 242606 transitions. [2021-12-06 20:18:38,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:18:38,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 598 [2021-12-06 20:18:38,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:18:38,160 INFO L225 Difference]: With dead ends: 223220 [2021-12-06 20:18:38,160 INFO L226 Difference]: Without dead ends: 116290 [2021-12-06 20:18:38,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:18:38,207 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 383 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:18:38,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 343 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 20:18:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116290 states. [2021-12-06 20:18:39,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116290 to 112882. [2021-12-06 20:18:39,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112882 states, 112881 states have (on average 1.0858691896776251) internal successors, (122574), 112881 states have internal predecessors, (122574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:39,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112882 states to 112882 states and 122574 transitions. [2021-12-06 20:18:39,506 INFO L78 Accepts]: Start accepts. Automaton has 112882 states and 122574 transitions. Word has length 598 [2021-12-06 20:18:39,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:18:39,507 INFO L470 AbstractCegarLoop]: Abstraction has 112882 states and 122574 transitions. [2021-12-06 20:18:39,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:39,507 INFO L276 IsEmpty]: Start isEmpty. Operand 112882 states and 122574 transitions. [2021-12-06 20:18:39,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2021-12-06 20:18:39,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:18:39,520 INFO L514 BasicCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-06 20:18:39,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 20:18:39,521 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:18:39,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:18:39,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1573225274, now seen corresponding path program 1 times [2021-12-06 20:18:39,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:18:39,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158016535] [2021-12-06 20:18:39,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:39,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:18:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 430 proven. 72 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 20:18:39,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:18:39,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158016535] [2021-12-06 20:18:39,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158016535] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:18:39,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136447426] [2021-12-06 20:18:39,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:39,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:18:39,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:18:39,690 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:18:39,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 20:18:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:39,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:18:39,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:18:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 307 proven. 31 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-06 20:18:40,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:18:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 338 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-06 20:18:40,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136447426] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 20:18:40,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:18:40,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2021-12-06 20:18:40,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230416844] [2021-12-06 20:18:40,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:18:40,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:18:40,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:40,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:18:40,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:18:40,867 INFO L87 Difference]: Start difference. First operand 112882 states and 122574 transitions. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:18:43,906 INFO L93 Difference]: Finished difference Result 239395 states and 259935 transitions. [2021-12-06 20:18:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:18:43,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 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 600 [2021-12-06 20:18:43,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:18:44,033 INFO L225 Difference]: With dead ends: 239395 [2021-12-06 20:18:44,034 INFO L226 Difference]: Without dead ends: 125238 [2021-12-06 20:18:44,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1203 GetRequests, 1196 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:18:44,083 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 889 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2104 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 2538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 2104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:18:44,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 150 Invalid, 2538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 2104 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 20:18:44,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125238 states. [2021-12-06 20:18:45,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125238 to 120111. [2021-12-06 20:18:45,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120111 states, 120110 states have (on average 1.0878528015985347) internal successors, (130662), 120110 states have internal predecessors, (130662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:45,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120111 states to 120111 states and 130662 transitions. [2021-12-06 20:18:45,658 INFO L78 Accepts]: Start accepts. Automaton has 120111 states and 130662 transitions. Word has length 600 [2021-12-06 20:18:45,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:18:45,659 INFO L470 AbstractCegarLoop]: Abstraction has 120111 states and 130662 transitions. [2021-12-06 20:18:45,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:45,659 INFO L276 IsEmpty]: Start isEmpty. Operand 120111 states and 130662 transitions. [2021-12-06 20:18:45,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2021-12-06 20:18:45,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:18:45,673 INFO L514 BasicCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:18:45,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 20:18:45,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:18:45,875 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:18:45,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:18:45,876 INFO L85 PathProgramCache]: Analyzing trace with hash 531792294, now seen corresponding path program 1 times [2021-12-06 20:18:45,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:18:45,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040553852] [2021-12-06 20:18:45,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:45,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:18:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 240 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:18:46,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:18:46,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040553852] [2021-12-06 20:18:46,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040553852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:18:46,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388299806] [2021-12-06 20:18:46,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:46,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:18:46,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:18:46,192 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:18:46,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 20:18:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:46,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:18:46,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:18:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 194 proven. 82 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 20:18:46,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:18:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 276 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 20:18:47,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388299806] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 20:18:47,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:18:47,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 8 [2021-12-06 20:18:47,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607982770] [2021-12-06 20:18:47,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:18:47,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:18:47,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:47,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:18:47,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:18:47,375 INFO L87 Difference]: Start difference. First operand 120111 states and 130662 transitions. Second operand has 4 states, 4 states have (on average 143.5) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:50,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:18:50,931 INFO L93 Difference]: Finished difference Result 252986 states and 274880 transitions. [2021-12-06 20:18:50,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:18:50,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 143.5) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 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 604 [2021-12-06 20:18:50,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:18:51,065 INFO L225 Difference]: With dead ends: 252986 [2021-12-06 20:18:51,065 INFO L226 Difference]: Without dead ends: 131602 [2021-12-06 20:18:51,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1210 GetRequests, 1204 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:18:51,099 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 545 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 2117 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 2741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 2117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:18:51,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 110 Invalid, 2741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 2117 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-06 20:18:51,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131602 states. [2021-12-06 20:18:52,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131602 to 126489. [2021-12-06 20:18:52,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126489 states, 126488 states have (on average 1.0697615584087028) internal successors, (135312), 126488 states have internal predecessors, (135312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:52,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126489 states to 126489 states and 135312 transitions. [2021-12-06 20:18:52,439 INFO L78 Accepts]: Start accepts. Automaton has 126489 states and 135312 transitions. Word has length 604 [2021-12-06 20:18:52,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:18:52,440 INFO L470 AbstractCegarLoop]: Abstraction has 126489 states and 135312 transitions. [2021-12-06 20:18:52,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.5) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:52,440 INFO L276 IsEmpty]: Start isEmpty. Operand 126489 states and 135312 transitions. [2021-12-06 20:18:52,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2021-12-06 20:18:52,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:18:52,452 INFO L514 BasicCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-06 20:18:52,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 20:18:52,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 20:18:52,654 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:18:52,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:18:52,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1738319825, now seen corresponding path program 1 times [2021-12-06 20:18:52,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:18:52,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729375048] [2021-12-06 20:18:52,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:52,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:18:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 456 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-06 20:18:52,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:18:52,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729375048] [2021-12-06 20:18:52,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729375048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:18:52,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:18:52,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:18:52,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476528055] [2021-12-06 20:18:52,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:18:52,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:18:52,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:52,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:18:52,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:18:52,963 INFO L87 Difference]: Start difference. First operand 126489 states and 135312 transitions. Second operand has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:55,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:18:55,580 INFO L93 Difference]: Finished difference Result 273385 states and 292825 transitions. [2021-12-06 20:18:55,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:18:55,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 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 618 [2021-12-06 20:18:55,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:18:55,822 INFO L225 Difference]: With dead ends: 273385 [2021-12-06 20:18:55,822 INFO L226 Difference]: Without dead ends: 146898 [2021-12-06 20:18:55,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:18:55,840 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 107 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:18:55,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 279 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 20:18:55,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146898 states. [2021-12-06 20:18:57,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146898 to 136678. [2021-12-06 20:18:57,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136678 states, 136677 states have (on average 1.060288124556436) internal successors, (144917), 136677 states have internal predecessors, (144917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136678 states to 136678 states and 144917 transitions. [2021-12-06 20:18:57,236 INFO L78 Accepts]: Start accepts. Automaton has 136678 states and 144917 transitions. Word has length 618 [2021-12-06 20:18:57,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:18:57,237 INFO L470 AbstractCegarLoop]: Abstraction has 136678 states and 144917 transitions. [2021-12-06 20:18:57,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:57,237 INFO L276 IsEmpty]: Start isEmpty. Operand 136678 states and 144917 transitions. [2021-12-06 20:18:57,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2021-12-06 20:18:57,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:18:57,247 INFO L514 BasicCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:18:57,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 20:18:57,247 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:18:57,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:18:57,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2032484293, now seen corresponding path program 1 times [2021-12-06 20:18:57,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:18:57,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579144257] [2021-12-06 20:18:57,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:57,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:18:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1098 backedges. 853 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-06 20:18:57,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:18:57,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579144257] [2021-12-06 20:18:57,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579144257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:18:57,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:18:57,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:18:57,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641017955] [2021-12-06 20:18:57,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:18:57,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:18:57,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:57,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:18:57,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:18:57,423 INFO L87 Difference]: Start difference. First operand 136678 states and 144917 transitions. Second operand has 5 states, 5 states have (on average 92.4) internal successors, (462), 5 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:01,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:19:01,657 INFO L93 Difference]: Finished difference Result 308271 states and 326746 transitions. [2021-12-06 20:19:01,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:19:01,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 92.4) internal successors, (462), 5 states have internal predecessors, (462), 0 states have call successors, (0), 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 624 [2021-12-06 20:19:01,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:19:01,824 INFO L225 Difference]: With dead ends: 308271 [2021-12-06 20:19:01,824 INFO L226 Difference]: Without dead ends: 171595 [2021-12-06 20:19:01,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:19:01,871 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 1152 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 4312 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 4697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 4312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:19:01,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 676 Invalid, 4697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 4312 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-06 20:19:02,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171595 states. [2021-12-06 20:19:03,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171595 to 147764. [2021-12-06 20:19:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147764 states, 147763 states have (on average 1.057917069902479) internal successors, (156321), 147763 states have internal predecessors, (156321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:03,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147764 states to 147764 states and 156321 transitions. [2021-12-06 20:19:03,649 INFO L78 Accepts]: Start accepts. Automaton has 147764 states and 156321 transitions. Word has length 624 [2021-12-06 20:19:03,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:19:03,649 INFO L470 AbstractCegarLoop]: Abstraction has 147764 states and 156321 transitions. [2021-12-06 20:19:03,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.4) internal successors, (462), 5 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:03,649 INFO L276 IsEmpty]: Start isEmpty. Operand 147764 states and 156321 transitions. [2021-12-06 20:19:03,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2021-12-06 20:19:03,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:19:03,660 INFO L514 BasicCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:19:03,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 20:19:03,660 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:19:03,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:19:03,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1188662782, now seen corresponding path program 1 times [2021-12-06 20:19:03,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:19:03,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859021039] [2021-12-06 20:19:03,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:19:03,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:19:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 421 proven. 0 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked. [2021-12-06 20:19:03,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:19:03,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859021039] [2021-12-06 20:19:03,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859021039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:19:03,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:19:03,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:19:03,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485698506] [2021-12-06 20:19:03,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:19:03,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:19:03,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:19:03,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:19:03,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:19:03,825 INFO L87 Difference]: Start difference. First operand 147764 states and 156321 transitions. Second operand has 4 states, 4 states have (on average 81.5) internal successors, (326), 4 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:07,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:19:07,047 INFO L93 Difference]: Finished difference Result 338535 states and 357482 transitions. [2021-12-06 20:19:07,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:19:07,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.5) internal successors, (326), 4 states have internal predecessors, (326), 0 states have call successors, (0), 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 644 [2021-12-06 20:19:07,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:19:07,296 INFO L225 Difference]: With dead ends: 338535 [2021-12-06 20:19:07,296 INFO L226 Difference]: Without dead ends: 190773 [2021-12-06 20:19:07,340 INFO L932 BasicCegarLoop]: 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 [2021-12-06 20:19:07,340 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 902 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 2280 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 2608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 2280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:19:07,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [902 Valid, 160 Invalid, 2608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 2280 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 20:19:07,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190773 states. [2021-12-06 20:19:09,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190773 to 182656. [2021-12-06 20:19:09,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182656 states, 182655 states have (on average 1.0551641071966276) internal successors, (192731), 182655 states have internal predecessors, (192731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:09,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182656 states to 182656 states and 192731 transitions. [2021-12-06 20:19:09,358 INFO L78 Accepts]: Start accepts. Automaton has 182656 states and 192731 transitions. Word has length 644 [2021-12-06 20:19:09,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:19:09,359 INFO L470 AbstractCegarLoop]: Abstraction has 182656 states and 192731 transitions. [2021-12-06 20:19:09,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.5) internal successors, (326), 4 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:09,359 INFO L276 IsEmpty]: Start isEmpty. Operand 182656 states and 192731 transitions. [2021-12-06 20:19:09,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 669 [2021-12-06 20:19:09,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:19:09,371 INFO L514 BasicCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:19:09,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 20:19:09,371 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:19:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:19:09,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1131825898, now seen corresponding path program 1 times [2021-12-06 20:19:09,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:19:09,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129159721] [2021-12-06 20:19:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:19:09,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:19:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 421 proven. 0 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2021-12-06 20:19:09,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:19:09,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129159721] [2021-12-06 20:19:09,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129159721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:19:09,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:19:09,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:19:09,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443943555] [2021-12-06 20:19:09,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:19:09,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:19:09,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:19:09,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:19:09,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:19:09,541 INFO L87 Difference]: Start difference. First operand 182656 states and 192731 transitions. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:13,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:19:13,188 INFO L93 Difference]: Finished difference Result 402363 states and 424149 transitions. [2021-12-06 20:19:13,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:19:13,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 668 [2021-12-06 20:19:13,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:19:13,438 INFO L225 Difference]: With dead ends: 402363 [2021-12-06 20:19:13,438 INFO L226 Difference]: Without dead ends: 219709 [2021-12-06 20:19:13,505 INFO L932 BasicCegarLoop]: 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 [2021-12-06 20:19:13,506 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 902 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 2279 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 2279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:19:13,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [902 Valid, 161 Invalid, 2620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 2279 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 20:19:13,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219709 states. [2021-12-06 20:19:15,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219709 to 183506. [2021-12-06 20:19:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183506 states, 183505 states have (on average 1.0552954960355303) internal successors, (193652), 183505 states have internal predecessors, (193652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183506 states to 183506 states and 193652 transitions. [2021-12-06 20:19:15,750 INFO L78 Accepts]: Start accepts. Automaton has 183506 states and 193652 transitions. Word has length 668 [2021-12-06 20:19:15,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:19:15,751 INFO L470 AbstractCegarLoop]: Abstraction has 183506 states and 193652 transitions. [2021-12-06 20:19:15,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:15,751 INFO L276 IsEmpty]: Start isEmpty. Operand 183506 states and 193652 transitions. [2021-12-06 20:19:15,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2021-12-06 20:19:15,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:19:15,770 INFO L514 BasicCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:19:15,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 20:19:15,771 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:19:15,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:19:15,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1427276477, now seen corresponding path program 1 times [2021-12-06 20:19:15,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:19:15,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21969740] [2021-12-06 20:19:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:19:15,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:19:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 448 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-06 20:19:16,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:19:16,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21969740] [2021-12-06 20:19:16,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21969740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:19:16,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:19:16,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:19:16,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192373909] [2021-12-06 20:19:16,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:19:16,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:19:16,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:19:16,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:19:16,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:19:16,096 INFO L87 Difference]: Start difference. First operand 183506 states and 193652 transitions. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:18,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:19:18,436 INFO L93 Difference]: Finished difference Result 367015 states and 387296 transitions. [2021-12-06 20:19:18,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:19:18,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 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 678 [2021-12-06 20:19:18,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:19:18,640 INFO L225 Difference]: With dead ends: 367015 [2021-12-06 20:19:18,641 INFO L226 Difference]: Without dead ends: 183936 [2021-12-06 20:19:18,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:19:18,726 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 8 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:19:18,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 742 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 20:19:18,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183936 states. [2021-12-06 20:19:20,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183936 to 180956. [2021-12-06 20:19:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180956 states, 180955 states have (on average 1.0555331435992374) internal successors, (191004), 180955 states have internal predecessors, (191004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:20,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180956 states to 180956 states and 191004 transitions. [2021-12-06 20:19:20,720 INFO L78 Accepts]: Start accepts. Automaton has 180956 states and 191004 transitions. Word has length 678 [2021-12-06 20:19:20,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:19:20,720 INFO L470 AbstractCegarLoop]: Abstraction has 180956 states and 191004 transitions. [2021-12-06 20:19:20,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:20,721 INFO L276 IsEmpty]: Start isEmpty. Operand 180956 states and 191004 transitions. [2021-12-06 20:19:20,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2021-12-06 20:19:20,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:19:20,738 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:19:20,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 20:19:20,738 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:19:20,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:19:20,739 INFO L85 PathProgramCache]: Analyzing trace with hash 206465313, now seen corresponding path program 1 times [2021-12-06 20:19:20,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:19:20,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880640532] [2021-12-06 20:19:20,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:19:20,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:19:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 1246 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-12-06 20:19:20,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:19:20,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880640532] [2021-12-06 20:19:20,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880640532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:19:20,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:19:20,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:19:20,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713955746] [2021-12-06 20:19:20,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:19:20,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:19:20,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:19:20,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:19:20,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:19:20,924 INFO L87 Difference]: Start difference. First operand 180956 states and 191004 transitions. Second operand has 4 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:24,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:19:24,458 INFO L93 Difference]: Finished difference Result 409617 states and 432139 transitions. [2021-12-06 20:19:24,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:19:24,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 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 724 [2021-12-06 20:19:24,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:19:24,715 INFO L225 Difference]: With dead ends: 409617 [2021-12-06 20:19:24,715 INFO L226 Difference]: Without dead ends: 229088 [2021-12-06 20:19:24,776 INFO L932 BasicCegarLoop]: 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 [2021-12-06 20:19:24,776 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 717 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2212 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 2600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 2212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:19:24,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 134 Invalid, 2600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 2212 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 20:19:24,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229088 states. [2021-12-06 20:19:27,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229088 to 220149. [2021-12-06 20:19:27,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220149 states, 220148 states have (on average 1.0510520195504842) internal successors, (231387), 220148 states have internal predecessors, (231387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220149 states to 220149 states and 231387 transitions. [2021-12-06 20:19:27,461 INFO L78 Accepts]: Start accepts. Automaton has 220149 states and 231387 transitions. Word has length 724 [2021-12-06 20:19:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:19:27,461 INFO L470 AbstractCegarLoop]: Abstraction has 220149 states and 231387 transitions. [2021-12-06 20:19:27,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 220149 states and 231387 transitions. [2021-12-06 20:19:27,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 768 [2021-12-06 20:19:27,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:19:27,485 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 20:19:27,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 20:19:27,486 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:19:27,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:19:27,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1524258698, now seen corresponding path program 1 times [2021-12-06 20:19:27,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:19:27,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627551187] [2021-12-06 20:19:27,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:19:27,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:19:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 1268 proven. 0 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-12-06 20:19:27,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:19:27,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627551187] [2021-12-06 20:19:27,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627551187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:19:27,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:19:27,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:19:27,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904678237] [2021-12-06 20:19:27,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:19:27,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:19:27,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:19:27,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:19:27,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:19:27,807 INFO L87 Difference]: Start difference. First operand 220149 states and 231387 transitions. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:30,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:19:30,178 INFO L93 Difference]: Finished difference Result 442439 states and 465012 transitions. [2021-12-06 20:19:30,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:19:30,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 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 767 [2021-12-06 20:19:30,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:19:30,447 INFO L225 Difference]: With dead ends: 442439 [2021-12-06 20:19:30,447 INFO L226 Difference]: Without dead ends: 222717 [2021-12-06 20:19:30,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:19:30,526 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 332 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:19:30,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 261 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 20:19:30,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222717 states. [2021-12-06 20:19:33,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222717 to 219724. [2021-12-06 20:19:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219724 states, 219723 states have (on average 1.0510506410343934) internal successors, (230940), 219723 states have internal predecessors, (230940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:33,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219724 states to 219724 states and 230940 transitions. [2021-12-06 20:19:33,304 INFO L78 Accepts]: Start accepts. Automaton has 219724 states and 230940 transitions. Word has length 767 [2021-12-06 20:19:33,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:19:33,304 INFO L470 AbstractCegarLoop]: Abstraction has 219724 states and 230940 transitions. [2021-12-06 20:19:33,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:33,305 INFO L276 IsEmpty]: Start isEmpty. Operand 219724 states and 230940 transitions. [2021-12-06 20:19:33,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 769 [2021-12-06 20:19:33,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:19:33,327 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:19:33,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 20:19:33,327 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:19:33,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:19:33,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1643803192, now seen corresponding path program 1 times [2021-12-06 20:19:33,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:19:33,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326035337] [2021-12-06 20:19:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:19:33,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:19:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 1113 proven. 0 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2021-12-06 20:19:33,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:19:33,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326035337] [2021-12-06 20:19:33,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326035337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:19:33,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:19:33,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:19:33,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875753725] [2021-12-06 20:19:33,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:19:33,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:19:33,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:19:33,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:19:33,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:19:33,544 INFO L87 Difference]: Start difference. First operand 219724 states and 230940 transitions. Second operand has 5 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:37,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:19:37,553 INFO L93 Difference]: Finished difference Result 463708 states and 487343 transitions. [2021-12-06 20:19:37,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:19:37,554 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 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 768 [2021-12-06 20:19:37,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:19:37,889 INFO L225 Difference]: With dead ends: 463708 [2021-12-06 20:19:37,889 INFO L226 Difference]: Without dead ends: 244411 [2021-12-06 20:19:37,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:19:37,931 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1707 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 2917 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1707 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 3452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 2917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:19:37,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1707 Valid, 183 Invalid, 3452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 2917 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-06 20:19:38,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244411 states. [2021-12-06 20:19:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244411 to 204372. [2021-12-06 20:19:40,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204372 states, 204371 states have (on average 1.0517783834301344) internal successors, (214953), 204371 states have internal predecessors, (214953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204372 states to 204372 states and 214953 transitions. [2021-12-06 20:19:40,519 INFO L78 Accepts]: Start accepts. Automaton has 204372 states and 214953 transitions. Word has length 768 [2021-12-06 20:19:40,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:19:40,519 INFO L470 AbstractCegarLoop]: Abstraction has 204372 states and 214953 transitions. [2021-12-06 20:19:40,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:40,519 INFO L276 IsEmpty]: Start isEmpty. Operand 204372 states and 214953 transitions. [2021-12-06 20:19:40,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2021-12-06 20:19:40,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:19:40,543 INFO L514 BasicCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 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] [2021-12-06 20:19:40,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 20:19:40,543 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:19:40,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:19:40,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1228326998, now seen corresponding path program 1 times [2021-12-06 20:19:40,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:19:40,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432622649] [2021-12-06 20:19:40,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:19:40,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:19:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 615 proven. 237 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 20:19:40,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:19:40,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432622649] [2021-12-06 20:19:40,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432622649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:19:40,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861970606] [2021-12-06 20:19:40,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:19:40,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:19:40,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:19:40,919 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:19:40,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 20:19:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:41,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:19:41,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:19:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 522 proven. 330 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 20:19:43,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:19:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2021-12-06 20:19:44,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861970606] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 20:19:44,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:19:44,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 6] total 10 [2021-12-06 20:19:44,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862157808] [2021-12-06 20:19:44,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:19:44,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:19:44,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:19:44,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:19:44,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:19:44,734 INFO L87 Difference]: Start difference. First operand 204372 states and 214953 transitions. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:47,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:19:47,286 INFO L93 Difference]: Finished difference Result 415564 states and 436890 transitions. [2021-12-06 20:19:47,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:19:47,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 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 789 [2021-12-06 20:19:47,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:19:47,550 INFO L225 Difference]: With dead ends: 415564 [2021-12-06 20:19:47,550 INFO L226 Difference]: Without dead ends: 210342 [2021-12-06 20:19:47,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1581 GetRequests, 1573 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:19:47,661 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 421 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:19:47,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 721 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 20:19:47,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210342 states. [2021-12-06 20:19:49,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210342 to 204370. [2021-12-06 20:19:49,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204370 states, 204369 states have (on average 1.0512210756034428) internal successors, (214837), 204369 states have internal predecessors, (214837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204370 states to 204370 states and 214837 transitions. [2021-12-06 20:19:50,217 INFO L78 Accepts]: Start accepts. Automaton has 204370 states and 214837 transitions. Word has length 789 [2021-12-06 20:19:50,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:19:50,218 INFO L470 AbstractCegarLoop]: Abstraction has 204370 states and 214837 transitions. [2021-12-06 20:19:50,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 204370 states and 214837 transitions. [2021-12-06 20:19:50,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 890 [2021-12-06 20:19:50,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:19:50,257 INFO L514 BasicCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 20:19:50,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 20:19:50,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-06 20:19:50,460 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:19:50,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:19:50,461 INFO L85 PathProgramCache]: Analyzing trace with hash 257173569, now seen corresponding path program 1 times [2021-12-06 20:19:50,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:19:50,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355769850] [2021-12-06 20:19:50,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:19:50,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:19:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 452 proven. 288 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 20:19:50,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:19:50,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355769850] [2021-12-06 20:19:50,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355769850] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:19:50,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115380342] [2021-12-06 20:19:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:19:50,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:19:50,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:19:50,799 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:19:50,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 20:19:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:51,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:19:51,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:19:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 452 proven. 288 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 20:19:51,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:19:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 452 proven. 288 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 20:19:53,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115380342] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:19:53,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:19:53,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-12-06 20:19:53,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135535358] [2021-12-06 20:19:53,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:19:53,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:19:53,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:19:53,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:19:53,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:19:53,166 INFO L87 Difference]: Start difference. First operand 204370 states and 214837 transitions. Second operand has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:19:56,919 INFO L93 Difference]: Finished difference Result 417258 states and 438375 transitions. [2021-12-06 20:19:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:19:56,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 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 889 [2021-12-06 20:19:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:19:57,144 INFO L225 Difference]: With dead ends: 417258 [2021-12-06 20:19:57,144 INFO L226 Difference]: Without dead ends: 212890 [2021-12-06 20:19:57,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1780 GetRequests, 1775 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:19:57,212 INFO L933 BasicCegarLoop]: 607 mSDtfsCounter, 543 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 3273 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 3566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 3273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:19:57,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 733 Invalid, 3566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 3273 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 20:19:57,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212890 states. [2021-12-06 20:19:59,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212890 to 204370. [2021-12-06 20:19:59,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204370 states, 204369 states have (on average 1.0506339024020277) internal successors, (214717), 204369 states have internal predecessors, (214717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:59,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204370 states to 204370 states and 214717 transitions. [2021-12-06 20:19:59,610 INFO L78 Accepts]: Start accepts. Automaton has 204370 states and 214717 transitions. Word has length 889 [2021-12-06 20:19:59,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:19:59,611 INFO L470 AbstractCegarLoop]: Abstraction has 204370 states and 214717 transitions. [2021-12-06 20:19:59,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:59,611 INFO L276 IsEmpty]: Start isEmpty. Operand 204370 states and 214717 transitions. [2021-12-06 20:19:59,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 943 [2021-12-06 20:19:59,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:19:59,661 INFO L514 BasicCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:19:59,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 20:19:59,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:19:59,863 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:19:59,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:19:59,865 INFO L85 PathProgramCache]: Analyzing trace with hash 885913285, now seen corresponding path program 1 times [2021-12-06 20:19:59,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:19:59,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396593268] [2021-12-06 20:19:59,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:19:59,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:20:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 704 proven. 0 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2021-12-06 20:20:00,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:20:00,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396593268] [2021-12-06 20:20:00,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396593268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:20:00,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:20:00,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:20:00,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011039554] [2021-12-06 20:20:00,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:20:00,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:20:00,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:20:00,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:20:00,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:20:00,196 INFO L87 Difference]: Start difference. First operand 204370 states and 214717 transitions. Second operand has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:20:02,548 INFO L93 Difference]: Finished difference Result 404046 states and 424333 transitions. [2021-12-06 20:20:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:20:02,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 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 942 [2021-12-06 20:20:02,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:20:02,917 INFO L225 Difference]: With dead ends: 404046 [2021-12-06 20:20:02,917 INFO L226 Difference]: Without dead ends: 199677 [2021-12-06 20:20:02,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:20:02,976 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 117 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:20:02,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 663 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 20:20:03,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199677 states. [2021-12-06 20:20:04,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199677 to 194996. [2021-12-06 20:20:04,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194996 states, 194995 states have (on average 1.04614990127952) internal successors, (203994), 194995 states have internal predecessors, (203994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:05,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194996 states to 194996 states and 203994 transitions. [2021-12-06 20:20:05,221 INFO L78 Accepts]: Start accepts. Automaton has 194996 states and 203994 transitions. Word has length 942 [2021-12-06 20:20:05,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:20:05,221 INFO L470 AbstractCegarLoop]: Abstraction has 194996 states and 203994 transitions. [2021-12-06 20:20:05,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:05,221 INFO L276 IsEmpty]: Start isEmpty. Operand 194996 states and 203994 transitions. [2021-12-06 20:20:05,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 954 [2021-12-06 20:20:05,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:20:05,266 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:20:05,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 20:20:05,266 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:20:05,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:20:05,266 INFO L85 PathProgramCache]: Analyzing trace with hash 626570891, now seen corresponding path program 1 times [2021-12-06 20:20:05,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:20:05,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058593370] [2021-12-06 20:20:05,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:20:05,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:20:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 1063 proven. 0 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2021-12-06 20:20:05,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:20:05,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058593370] [2021-12-06 20:20:05,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058593370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:20:05,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:20:05,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:20:05,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679245537] [2021-12-06 20:20:05,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:20:05,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:20:05,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:20:05,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:20:05,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:20:05,522 INFO L87 Difference]: Start difference. First operand 194996 states and 203994 transitions. Second operand has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:08,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:20:08,045 INFO L93 Difference]: Finished difference Result 388699 states and 406609 transitions. [2021-12-06 20:20:08,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:20:08,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 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 953 [2021-12-06 20:20:08,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:20:08,242 INFO L225 Difference]: With dead ends: 388699 [2021-12-06 20:20:08,243 INFO L226 Difference]: Without dead ends: 193705 [2021-12-06 20:20:08,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:20:08,305 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 200 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:20:08,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 152 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 20:20:08,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193705 states. [2021-12-06 20:20:10,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193705 to 181364. [2021-12-06 20:20:10,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181364 states, 181363 states have (on average 1.044353037830208) internal successors, (189407), 181363 states have internal predecessors, (189407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:10,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181364 states to 181364 states and 189407 transitions. [2021-12-06 20:20:10,396 INFO L78 Accepts]: Start accepts. Automaton has 181364 states and 189407 transitions. Word has length 953 [2021-12-06 20:20:10,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:20:10,397 INFO L470 AbstractCegarLoop]: Abstraction has 181364 states and 189407 transitions. [2021-12-06 20:20:10,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:10,397 INFO L276 IsEmpty]: Start isEmpty. Operand 181364 states and 189407 transitions. [2021-12-06 20:20:10,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 969 [2021-12-06 20:20:10,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:20:10,444 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 20:20:10,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-06 20:20:10,444 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:20:10,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:20:10,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1115149903, now seen corresponding path program 1 times [2021-12-06 20:20:10,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:20:10,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696040288] [2021-12-06 20:20:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:20:10,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:20:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 952 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2021-12-06 20:20:10,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:20:10,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696040288] [2021-12-06 20:20:10,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696040288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:20:10,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:20:10,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:20:10,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562782710] [2021-12-06 20:20:10,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:20:10,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:20:10,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:20:10,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:20:10,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:20:10,721 INFO L87 Difference]: Start difference. First operand 181364 states and 189407 transitions. Second operand has 3 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:12,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:20:12,938 INFO L93 Difference]: Finished difference Result 364427 states and 380626 transitions. [2021-12-06 20:20:12,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:20:12,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 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 968 [2021-12-06 20:20:12,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:20:13,127 INFO L225 Difference]: With dead ends: 364427 [2021-12-06 20:20:13,127 INFO L226 Difference]: Without dead ends: 183065 [2021-12-06 20:20:13,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:20:13,191 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 22 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:20:13,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 707 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 20:20:13,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183065 states. [2021-12-06 20:20:15,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183065 to 174983. [2021-12-06 20:20:15,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174983 states, 174982 states have (on average 1.0432673074944852) internal successors, (182553), 174982 states have internal predecessors, (182553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:15,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174983 states to 174983 states and 182553 transitions. [2021-12-06 20:20:15,276 INFO L78 Accepts]: Start accepts. Automaton has 174983 states and 182553 transitions. Word has length 968 [2021-12-06 20:20:15,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:20:15,277 INFO L470 AbstractCegarLoop]: Abstraction has 174983 states and 182553 transitions. [2021-12-06 20:20:15,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:15,277 INFO L276 IsEmpty]: Start isEmpty. Operand 174983 states and 182553 transitions. [2021-12-06 20:20:15,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2021-12-06 20:20:15,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:20:15,324 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 20:20:15,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-06 20:20:15,324 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:20:15,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:20:15,324 INFO L85 PathProgramCache]: Analyzing trace with hash -818617187, now seen corresponding path program 1 times [2021-12-06 20:20:15,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:20:15,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917797886] [2021-12-06 20:20:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:20:15,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:20:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 953 proven. 72 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked. [2021-12-06 20:20:15,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:20:15,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917797886] [2021-12-06 20:20:15,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917797886] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:20:15,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935250602] [2021-12-06 20:20:15,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:20:15,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:20:15,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:20:15,630 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:20:15,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 20:20:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:15,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:20:15,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:20:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 544 proven. 0 refuted. 0 times theorem prover too weak. 1047 trivial. 0 not checked. [2021-12-06 20:20:16,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:20:16,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935250602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:20:16,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:20:16,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-06 20:20:16,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897650072] [2021-12-06 20:20:16,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:20:16,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:20:16,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:20:16,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:20:16,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:20:16,631 INFO L87 Difference]: Start difference. First operand 174983 states and 182553 transitions. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:18,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:20:18,724 INFO L93 Difference]: Finished difference Result 349964 states and 365104 transitions. [2021-12-06 20:20:18,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:20:18,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 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 977 [2021-12-06 20:20:18,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:20:18,902 INFO L225 Difference]: With dead ends: 349964 [2021-12-06 20:20:18,902 INFO L226 Difference]: Without dead ends: 174983 [2021-12-06 20:20:18,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 977 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:20:18,961 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 353 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:20:18,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 735 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 20:20:19,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174983 states. [2021-12-06 20:20:20,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174983 to 174983. [2021-12-06 20:20:20,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174983 states, 174982 states have (on average 1.0427986878650375) internal successors, (182471), 174982 states have internal predecessors, (182471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:20,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174983 states to 174983 states and 182471 transitions. [2021-12-06 20:20:20,968 INFO L78 Accepts]: Start accepts. Automaton has 174983 states and 182471 transitions. Word has length 977 [2021-12-06 20:20:20,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:20:20,969 INFO L470 AbstractCegarLoop]: Abstraction has 174983 states and 182471 transitions. [2021-12-06 20:20:20,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:20,969 INFO L276 IsEmpty]: Start isEmpty. Operand 174983 states and 182471 transitions. [2021-12-06 20:20:21,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 987 [2021-12-06 20:20:21,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:20:21,028 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:20:21,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 20:20:21,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-06 20:20:21,231 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:20:21,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:20:21,233 INFO L85 PathProgramCache]: Analyzing trace with hash -2136383025, now seen corresponding path program 1 times [2021-12-06 20:20:21,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:20:21,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583155838] [2021-12-06 20:20:21,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:20:21,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:20:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 545 proven. 0 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-06 20:20:21,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:20:21,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583155838] [2021-12-06 20:20:21,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583155838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:20:21,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:20:21,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:20:21,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809872169] [2021-12-06 20:20:21,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:20:21,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:20:21,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:20:21,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:20:21,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:20:21,592 INFO L87 Difference]: Start difference. First operand 174983 states and 182471 transitions. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:24,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:20:24,975 INFO L93 Difference]: Finished difference Result 365324 states and 380811 transitions. [2021-12-06 20:20:24,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:20:24,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 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 986 [2021-12-06 20:20:24,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:20:25,156 INFO L225 Difference]: With dead ends: 365324 [2021-12-06 20:20:25,156 INFO L226 Difference]: Without dead ends: 189918 [2021-12-06 20:20:25,227 INFO L932 BasicCegarLoop]: 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 [2021-12-06 20:20:25,228 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 841 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2315 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 2585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 2315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:20:25,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 170 Invalid, 2585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 2315 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 20:20:25,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189918 states. [2021-12-06 20:20:26,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189918 to 173709. [2021-12-06 20:20:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173709 states, 173708 states have (on average 1.0428477675179035) internal successors, (181151), 173708 states have internal predecessors, (181151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:27,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173709 states to 173709 states and 181151 transitions. [2021-12-06 20:20:27,235 INFO L78 Accepts]: Start accepts. Automaton has 173709 states and 181151 transitions. Word has length 986 [2021-12-06 20:20:27,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:20:27,236 INFO L470 AbstractCegarLoop]: Abstraction has 173709 states and 181151 transitions. [2021-12-06 20:20:27,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:27,236 INFO L276 IsEmpty]: Start isEmpty. Operand 173709 states and 181151 transitions. [2021-12-06 20:20:27,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1058 [2021-12-06 20:20:27,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:20:27,403 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:20:27,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-06 20:20:27,404 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:20:27,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:20:27,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2040624325, now seen corresponding path program 1 times [2021-12-06 20:20:27,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:20:27,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226743153] [2021-12-06 20:20:27,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:20:27,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:20:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1586 backedges. 544 proven. 0 refuted. 0 times theorem prover too weak. 1042 trivial. 0 not checked. [2021-12-06 20:20:27,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:20:27,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226743153] [2021-12-06 20:20:27,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226743153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:20:27,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:20:27,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:20:27,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881041681] [2021-12-06 20:20:27,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:20:27,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:20:27,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:20:27,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:20:27,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:20:27,696 INFO L87 Difference]: Start difference. First operand 173709 states and 181151 transitions. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:31,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:20:31,137 INFO L93 Difference]: Finished difference Result 369149 states and 384606 transitions. [2021-12-06 20:20:31,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:20:31,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 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 1057 [2021-12-06 20:20:31,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:20:31,407 INFO L225 Difference]: With dead ends: 369149 [2021-12-06 20:20:31,407 INFO L226 Difference]: Without dead ends: 195017 [2021-12-06 20:20:31,462 INFO L932 BasicCegarLoop]: 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 [2021-12-06 20:20:31,462 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 848 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2304 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 2660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 2304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:20:31,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 128 Invalid, 2660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 2304 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 20:20:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195017 states. [2021-12-06 20:20:33,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195017 to 174558. [2021-12-06 20:20:33,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174558 states, 174557 states have (on average 1.0417170322588036) internal successors, (181839), 174557 states have internal predecessors, (181839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174558 states to 174558 states and 181839 transitions. [2021-12-06 20:20:33,564 INFO L78 Accepts]: Start accepts. Automaton has 174558 states and 181839 transitions. Word has length 1057 [2021-12-06 20:20:33,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:20:33,565 INFO L470 AbstractCegarLoop]: Abstraction has 174558 states and 181839 transitions. [2021-12-06 20:20:33,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:33,565 INFO L276 IsEmpty]: Start isEmpty. Operand 174558 states and 181839 transitions. [2021-12-06 20:20:33,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1065 [2021-12-06 20:20:33,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:20:33,619 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 20:20:33,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-06 20:20:33,619 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:20:33,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:20:33,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1798943370, now seen corresponding path program 1 times [2021-12-06 20:20:33,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:20:33,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729057064] [2021-12-06 20:20:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:20:33,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:20:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 827 proven. 0 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2021-12-06 20:20:33,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:20:33,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729057064] [2021-12-06 20:20:33,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729057064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:20:33,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:20:33,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:20:33,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255343364] [2021-12-06 20:20:33,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:20:33,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:20:33,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:20:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:20:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:20:33,913 INFO L87 Difference]: Start difference. First operand 174558 states and 181839 transitions. Second operand has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:35,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:20:35,991 INFO L93 Difference]: Finished difference Result 346567 states and 361056 transitions. [2021-12-06 20:20:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:20:35,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 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 1064 [2021-12-06 20:20:35,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:20:36,164 INFO L225 Difference]: With dead ends: 346567 [2021-12-06 20:20:36,165 INFO L226 Difference]: Without dead ends: 172011 [2021-12-06 20:20:36,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:20:36,317 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 266 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:20:36,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 226 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 20:20:36,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172011 states. [2021-12-06 20:20:37,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172011 to 154582. [2021-12-06 20:20:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154582 states, 154581 states have (on average 1.0405871355470595) internal successors, (160855), 154581 states have internal predecessors, (160855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154582 states to 154582 states and 160855 transitions. [2021-12-06 20:20:38,135 INFO L78 Accepts]: Start accepts. Automaton has 154582 states and 160855 transitions. Word has length 1064 [2021-12-06 20:20:38,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:20:38,136 INFO L470 AbstractCegarLoop]: Abstraction has 154582 states and 160855 transitions. [2021-12-06 20:20:38,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:38,136 INFO L276 IsEmpty]: Start isEmpty. Operand 154582 states and 160855 transitions. [2021-12-06 20:20:38,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1070 [2021-12-06 20:20:38,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:20:38,191 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 20:20:38,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-06 20:20:38,191 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:20:38,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:20:38,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2048231989, now seen corresponding path program 1 times [2021-12-06 20:20:38,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:20:38,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593171190] [2021-12-06 20:20:38,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:20:38,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:20:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1879 backedges. 788 proven. 125 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2021-12-06 20:20:38,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:20:38,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593171190] [2021-12-06 20:20:38,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593171190] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:20:38,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370735817] [2021-12-06 20:20:38,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:20:38,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:20:38,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:20:38,665 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:20:38,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 20:20:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:38,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1296 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:20:38,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:20:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1879 backedges. 1064 proven. 288 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2021-12-06 20:20:39,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:20:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1879 backedges. 913 proven. 0 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2021-12-06 20:20:40,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370735817] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 20:20:40,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:20:40,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 10 [2021-12-06 20:20:40,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462028216] [2021-12-06 20:20:40,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:20:40,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:20:40,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:20:40,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:20:40,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:20:40,491 INFO L87 Difference]: Start difference. First operand 154582 states and 160855 transitions. Second operand has 3 states, 3 states have (on average 211.33333333333334) internal successors, (634), 3 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:42,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:20:42,706 INFO L93 Difference]: Finished difference Result 313436 states and 326035 transitions. [2021-12-06 20:20:42,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:20:42,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 211.33333333333334) internal successors, (634), 3 states have internal predecessors, (634), 0 states have call successors, (0), 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 1069 [2021-12-06 20:20:42,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:20:42,868 INFO L225 Difference]: With dead ends: 313436 [2021-12-06 20:20:42,869 INFO L226 Difference]: Without dead ends: 158856 [2021-12-06 20:20:42,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2142 GetRequests, 2134 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:20:42,926 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 188 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:20:42,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 179 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 20:20:43,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158856 states. [2021-12-06 20:20:44,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158856 to 140527. [2021-12-06 20:20:44,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140527 states, 140526 states have (on average 1.0394304256863498) internal successors, (146067), 140526 states have internal predecessors, (146067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140527 states to 140527 states and 146067 transitions. [2021-12-06 20:20:44,751 INFO L78 Accepts]: Start accepts. Automaton has 140527 states and 146067 transitions. Word has length 1069 [2021-12-06 20:20:44,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:20:44,752 INFO L470 AbstractCegarLoop]: Abstraction has 140527 states and 146067 transitions. [2021-12-06 20:20:44,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.33333333333334) internal successors, (634), 3 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:44,752 INFO L276 IsEmpty]: Start isEmpty. Operand 140527 states and 146067 transitions. [2021-12-06 20:20:44,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1081 [2021-12-06 20:20:44,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:20:44,807 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:20:44,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 20:20:45,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 20:20:45,009 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:20:45,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:20:45,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1424905279, now seen corresponding path program 1 times [2021-12-06 20:20:45,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:20:45,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098840428] [2021-12-06 20:20:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:20:45,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:20:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2092 backedges. 1385 proven. 0 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2021-12-06 20:20:45,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:20:45,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098840428] [2021-12-06 20:20:45,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098840428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:20:45,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:20:45,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:20:45,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085033077] [2021-12-06 20:20:45,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:20:45,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:20:45,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:20:45,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:20:45,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:20:45,289 INFO L87 Difference]: Start difference. First operand 140527 states and 146067 transitions. Second operand has 4 states, 4 states have (on average 170.5) internal successors, (682), 4 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:48,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:20:48,123 INFO L93 Difference]: Finished difference Result 286602 states and 297860 transitions. [2021-12-06 20:20:48,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:20:48,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 170.5) internal successors, (682), 4 states have internal predecessors, (682), 0 states have call successors, (0), 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 1080 [2021-12-06 20:20:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:20:48,263 INFO L225 Difference]: With dead ends: 286602 [2021-12-06 20:20:48,263 INFO L226 Difference]: Without dead ends: 146077 [2021-12-06 20:20:48,319 INFO L932 BasicCegarLoop]: 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 [2021-12-06 20:20:48,319 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 786 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2153 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 2153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:20:48,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 200 Invalid, 2392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 2153 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 20:20:48,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146077 states. [2021-12-06 20:20:49,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146077 to 131577. [2021-12-06 20:20:49,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131577 states, 131576 states have (on average 1.0375068401532195) internal successors, (136511), 131576 states have internal predecessors, (136511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131577 states to 131577 states and 136511 transitions. [2021-12-06 20:20:50,005 INFO L78 Accepts]: Start accepts. Automaton has 131577 states and 136511 transitions. Word has length 1080 [2021-12-06 20:20:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:20:50,005 INFO L470 AbstractCegarLoop]: Abstraction has 131577 states and 136511 transitions. [2021-12-06 20:20:50,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.5) internal successors, (682), 4 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:50,006 INFO L276 IsEmpty]: Start isEmpty. Operand 131577 states and 136511 transitions. [2021-12-06 20:20:50,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1208 [2021-12-06 20:20:50,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:20:50,071 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 20:20:50,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-06 20:20:50,071 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:20:50,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:20:50,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2003923678, now seen corresponding path program 1 times [2021-12-06 20:20:50,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:20:50,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977431088] [2021-12-06 20:20:50,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:20:50,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:20:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2436 backedges. 1050 proven. 0 refuted. 0 times theorem prover too weak. 1386 trivial. 0 not checked. [2021-12-06 20:20:50,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:20:50,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977431088] [2021-12-06 20:20:50,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977431088] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:20:50,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:20:50,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:20:50,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475440378] [2021-12-06 20:20:50,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:20:50,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:20:50,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:20:50,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:20:50,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:20:50,416 INFO L87 Difference]: Start difference. First operand 131577 states and 136511 transitions. Second operand has 3 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:52,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:20:52,570 INFO L93 Difference]: Finished difference Result 258875 states and 268449 transitions. [2021-12-06 20:20:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:20:52,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 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 1207 [2021-12-06 20:20:52,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:20:52,679 INFO L225 Difference]: With dead ends: 258875 [2021-12-06 20:20:52,679 INFO L226 Difference]: Without dead ends: 126025 [2021-12-06 20:20:52,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:20:52,720 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 138 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:20:52,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 557 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 20:20:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126025 states. [2021-12-06 20:20:53,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126025 to 120925. [2021-12-06 20:20:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120925 states, 120924 states have (on average 1.035385862194436) internal successors, (125203), 120924 states have internal predecessors, (125203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:54,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120925 states to 120925 states and 125203 transitions. [2021-12-06 20:20:54,141 INFO L78 Accepts]: Start accepts. Automaton has 120925 states and 125203 transitions. Word has length 1207 [2021-12-06 20:20:54,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:20:54,142 INFO L470 AbstractCegarLoop]: Abstraction has 120925 states and 125203 transitions. [2021-12-06 20:20:54,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:54,143 INFO L276 IsEmpty]: Start isEmpty. Operand 120925 states and 125203 transitions. [2021-12-06 20:20:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1583 [2021-12-06 20:20:54,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:20:54,252 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 20:20:54,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-06 20:20:54,252 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:20:54,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:20:54,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2070910351, now seen corresponding path program 1 times [2021-12-06 20:20:54,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:20:54,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651406915] [2021-12-06 20:20:54,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:20:54,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:20:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3098 backedges. 2156 proven. 537 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2021-12-06 20:20:54,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:20:54,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651406915] [2021-12-06 20:20:54,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651406915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:20:54,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497614862] [2021-12-06 20:20:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:20:54,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:20:54,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:20:54,968 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:20:54,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 20:20:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:55,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 1826 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:20:55,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:20:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3098 backedges. 2287 proven. 0 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2021-12-06 20:20:58,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:20:58,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497614862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:20:58,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:20:58,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-12-06 20:20:58,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319252688] [2021-12-06 20:20:58,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:20:58,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:20:58,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:20:58,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:20:58,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:20:58,791 INFO L87 Difference]: Start difference. First operand 120925 states and 125203 transitions. Second operand has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:21:00,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:21:00,892 INFO L93 Difference]: Finished difference Result 248211 states and 256975 transitions. [2021-12-06 20:21:00,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:21:00,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 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 1582 [2021-12-06 20:21:00,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:21:01,003 INFO L225 Difference]: With dead ends: 248211 [2021-12-06 20:21:01,004 INFO L226 Difference]: Without dead ends: 128138 [2021-12-06 20:21:01,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1585 GetRequests, 1581 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:21:01,053 INFO L933 BasicCegarLoop]: 634 mSDtfsCounter, 437 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 2998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1915 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:21:01,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 704 Invalid, 2998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1051 Invalid, 0 Unknown, 1915 Unchecked, 1.5s Time] [2021-12-06 20:21:01,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128138 states. [2021-12-06 20:21:02,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128138 to 123445. [2021-12-06 20:21:02,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123445 states, 123444 states have (on average 1.035700398561291) internal successors, (127851), 123444 states have internal predecessors, (127851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:21:02,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123445 states to 123445 states and 127851 transitions. [2021-12-06 20:21:02,435 INFO L78 Accepts]: Start accepts. Automaton has 123445 states and 127851 transitions. Word has length 1582 [2021-12-06 20:21:02,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:21:02,436 INFO L470 AbstractCegarLoop]: Abstraction has 123445 states and 127851 transitions. [2021-12-06 20:21:02,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:21:02,437 INFO L276 IsEmpty]: Start isEmpty. Operand 123445 states and 127851 transitions. [2021-12-06 20:21:02,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1605 [2021-12-06 20:21:02,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:21:02,547 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 20:21:02,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 20:21:02,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:21:02,749 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:21:02,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:21:02,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1485594144, now seen corresponding path program 1 times [2021-12-06 20:21:02,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:21:02,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793178510] [2021-12-06 20:21:02,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:21:02,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:21:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:21:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3094 backedges. 2272 proven. 469 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2021-12-06 20:21:03,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:21:03,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793178510] [2021-12-06 20:21:03,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793178510] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:21:03,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444298254] [2021-12-06 20:21:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:21:03,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:21:03,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:21:03,289 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:21:03,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 20:21:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:21:03,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 20:21:03,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:21:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3094 backedges. 1166 proven. 1381 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2021-12-06 20:21:11,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:21:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3094 backedges. 2052 proven. 0 refuted. 0 times theorem prover too weak. 1042 trivial. 0 not checked. [2021-12-06 20:21:15,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444298254] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 20:21:15,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:21:15,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 8] total 16 [2021-12-06 20:21:15,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402844914] [2021-12-06 20:21:15,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:21:15,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:21:15,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:21:15,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:21:15,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:21:15,272 INFO L87 Difference]: Start difference. First operand 123445 states and 127851 transitions. Second operand has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:21:18,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:21:18,684 INFO L93 Difference]: Finished difference Result 253293 states and 262214 transitions. [2021-12-06 20:21:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:21:18,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 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 1604 [2021-12-06 20:21:18,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:21:18,686 INFO L225 Difference]: With dead ends: 253293 [2021-12-06 20:21:18,686 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 20:21:18,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3211 GetRequests, 3197 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:21:18,742 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 2018 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2161 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2018 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 2161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:21:18,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2018 Valid, 76 Invalid, 2617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 2161 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 20:21:18,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 20:21:18,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 20:21:18,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:21:18,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 20:21:18,743 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1604 [2021-12-06 20:21:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:21:18,743 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 20:21:18,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:21:18,744 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 20:21:18,744 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 20:21:18,746 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 20:21:18,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 20:21:18,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4e84886-d955-4909-9176-c1f40eb3d144/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:21:18,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.