./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/condn.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/condn.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8 --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 d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 20:05:18,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:05:18,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:05:18,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:05:18,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:05:18,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:05:18,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:05:18,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:05:18,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:05:18,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:05:18,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:05:18,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:05:18,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:05:18,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:05:18,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:05:18,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:05:18,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:05:18,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:05:18,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:05:18,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:05:18,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:05:18,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:05:18,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:05:18,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:05:18,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:05:18,519 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:05:18,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:05:18,520 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:05:18,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:05:18,521 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:05:18,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:05:18,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:05:18,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:05:18,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:05:18,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:05:18,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:05:18,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:05:18,524 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:05:18,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:05:18,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:05:18,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:05:18,526 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 20:05:18,540 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:05:18,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:05:18,540 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:05:18,541 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:05:18,541 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:05:18,541 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:05:18,542 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:05:18,542 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:05:18,542 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:05:18,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:05:18,542 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:05:18,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:05:18,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:05:18,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:05:18,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 20:05:18,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:05:18,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 20:05:18,549 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:05:18,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 20:05:18,549 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:05:18,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 20:05:18,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:05:18,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:05:18,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:05:18,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:05:18,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:05:18,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:05:18,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 20:05:18,550 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 20:05:18,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 20:05:18,550 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:05:18,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 20:05:18,551 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:05:18,551 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:05:18,551 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:05:18,551 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 [2022-12-13 20:05:18,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:05:18,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:05:18,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:05:18,734 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:05:18,734 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:05:18,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-fpi/condn.c [2022-12-13 20:05:21,323 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:05:21,467 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:05:21,467 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/sv-benchmarks/c/array-fpi/condn.c [2022-12-13 20:05:21,471 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/data/cf018d9bf/cbc9c4045b01476fa6c5a73eaffeb55c/FLAGbf7e0974a [2022-12-13 20:05:21,482 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/data/cf018d9bf/cbc9c4045b01476fa6c5a73eaffeb55c [2022-12-13 20:05:21,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:05:21,484 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:05:21,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:05:21,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:05:21,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:05:21,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:05:21" (1/1) ... [2022-12-13 20:05:21,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a872063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:05:21, skipping insertion in model container [2022-12-13 20:05:21,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:05:21" (1/1) ... [2022-12-13 20:05:21,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:05:21,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:05:21,649 WARN L237 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_9932baa0-c109-46ef-9865-a9d84f7513c0/sv-benchmarks/c/array-fpi/condn.c[588,601] [2022-12-13 20:05:21,663 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:05:21,670 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 20:05:21,680 WARN L237 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_9932baa0-c109-46ef-9865-a9d84f7513c0/sv-benchmarks/c/array-fpi/condn.c[588,601] [2022-12-13 20:05:21,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:05:21,694 INFO L208 MainTranslator]: Completed translation [2022-12-13 20:05:21,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:05:21 WrapperNode [2022-12-13 20:05:21,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:05:21,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 20:05:21,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 20:05:21,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 20:05:21,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:05:21" (1/1) ... [2022-12-13 20:05:21,706 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:05:21" (1/1) ... [2022-12-13 20:05:21,719 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2022-12-13 20:05:21,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 20:05:21,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 20:05:21,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 20:05:21,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 20:05:21,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:05:21" (1/1) ... [2022-12-13 20:05:21,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:05:21" (1/1) ... [2022-12-13 20:05:21,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:05:21" (1/1) ... [2022-12-13 20:05:21,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:05:21" (1/1) ... [2022-12-13 20:05:21,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:05:21" (1/1) ... [2022-12-13 20:05:21,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:05:21" (1/1) ... [2022-12-13 20:05:21,734 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:05:21" (1/1) ... [2022-12-13 20:05:21,734 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:05:21" (1/1) ... [2022-12-13 20:05:21,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 20:05:21,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 20:05:21,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 20:05:21,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 20:05:21,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:05:21" (1/1) ... [2022-12-13 20:05:21,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:05:21,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:05:21,760 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 20:05:21,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 20:05:21,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 20:05:21,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 20:05:21,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 20:05:21,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 20:05:21,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 20:05:21,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 20:05:21,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 20:05:21,847 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 20:05:21,849 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 20:05:21,954 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 20:05:21,959 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 20:05:21,959 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 20:05:21,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:05:21 BoogieIcfgContainer [2022-12-13 20:05:21,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 20:05:21,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 20:05:21,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 20:05:21,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 20:05:21,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 08:05:21" (1/3) ... [2022-12-13 20:05:21,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@316b0aea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:05:21, skipping insertion in model container [2022-12-13 20:05:21,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:05:21" (2/3) ... [2022-12-13 20:05:21,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@316b0aea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:05:21, skipping insertion in model container [2022-12-13 20:05:21,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:05:21" (3/3) ... [2022-12-13 20:05:21,967 INFO L112 eAbstractionObserver]: Analyzing ICFG condn.c [2022-12-13 20:05:21,981 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 20:05:21,981 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 20:05:22,016 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:05:22,021 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@23c776db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:05:22,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 20:05:22,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:22,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 20:05:22,046 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:05:22,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:05:22,047 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:05:22,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:05:22,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1828392228, now seen corresponding path program 1 times [2022-12-13 20:05:22,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:05:22,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651645500] [2022-12-13 20:05:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:05:22,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:05:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:05:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:05:22,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:05:22,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651645500] [2022-12-13 20:05:22,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651645500] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:05:22,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:05:22,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:05:22,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227437431] [2022-12-13 20:05:22,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:05:22,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 20:05:22,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:05:22,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 20:05:22,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 20:05:22,204 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 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 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:22,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:05:22,216 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-12-13 20:05:22,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 20:05:22,217 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-13 20:05:22,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:05:22,223 INFO L225 Difference]: With dead ends: 40 [2022-12-13 20:05:22,223 INFO L226 Difference]: Without dead ends: 18 [2022-12-13 20:05:22,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 20:05:22,227 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:05:22,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:05:22,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-13 20:05:22,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-13 20:05:22,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:22,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-12-13 20:05:22,250 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2022-12-13 20:05:22,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:05:22,250 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-12-13 20:05:22,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:22,250 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-12-13 20:05:22,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 20:05:22,251 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:05:22,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:05:22,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 20:05:22,251 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:05:22,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:05:22,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1148333858, now seen corresponding path program 1 times [2022-12-13 20:05:22,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:05:22,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184805104] [2022-12-13 20:05:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:05:22,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:05:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:05:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:05:22,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:05:22,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184805104] [2022-12-13 20:05:22,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184805104] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:05:22,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:05:22,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:05:22,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610251669] [2022-12-13 20:05:22,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:05:22,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:05:22,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:05:22,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:05:22,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:05:22,365 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:22,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:05:22,412 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-12-13 20:05:22,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:05:22,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-13 20:05:22,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:05:22,413 INFO L225 Difference]: With dead ends: 40 [2022-12-13 20:05:22,413 INFO L226 Difference]: Without dead ends: 29 [2022-12-13 20:05:22,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:05:22,415 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:05:22,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 15 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:05:22,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-13 20:05:22,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-12-13 20:05:22,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-12-13 20:05:22,420 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-12-13 20:05:22,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:05:22,421 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-12-13 20:05:22,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:22,421 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-12-13 20:05:22,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 20:05:22,421 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:05:22,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:05:22,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 20:05:22,422 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:05:22,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:05:22,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2142875084, now seen corresponding path program 1 times [2022-12-13 20:05:22,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:05:22,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386377465] [2022-12-13 20:05:22,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:05:22,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:05:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:05:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:05:22,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:05:22,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386377465] [2022-12-13 20:05:22,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386377465] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:05:22,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427524372] [2022-12-13 20:05:22,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:05:22,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:05:22,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:05:22,820 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:05:22,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 20:05:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:05:22,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 20:05:22,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:05:22,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 23 [2022-12-13 20:05:23,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-13 20:05:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:05:23,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:05:23,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-12-13 20:05:23,121 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 20:05:23,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 28 [2022-12-13 20:05:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:05:23,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427524372] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:05:23,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:05:23,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-12-13 20:05:23,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516709639] [2022-12-13 20:05:23,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:05:23,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 20:05:23,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:05:23,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 20:05:23,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:05:23,136 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 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) [2022-12-13 20:05:23,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:05:23,364 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-12-13 20:05:23,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 20:05:23,365 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 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 17 [2022-12-13 20:05:23,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:05:23,365 INFO L225 Difference]: With dead ends: 47 [2022-12-13 20:05:23,366 INFO L226 Difference]: Without dead ends: 45 [2022-12-13 20:05:23,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-12-13 20:05:23,367 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 73 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:05:23,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 68 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:05:23,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-13 20:05:23,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2022-12-13 20:05:23,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-12-13 20:05:23,374 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2022-12-13 20:05:23,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:05:23,375 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-12-13 20:05:23,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 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) [2022-12-13 20:05:23,375 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-12-13 20:05:23,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 20:05:23,375 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:05:23,376 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:05:23,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 20:05:23,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:05:23,577 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:05:23,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:05:23,578 INFO L85 PathProgramCache]: Analyzing trace with hash 2090341226, now seen corresponding path program 1 times [2022-12-13 20:05:23,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:05:23,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093371816] [2022-12-13 20:05:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:05:23,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:05:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:05:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:05:23,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:05:23,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093371816] [2022-12-13 20:05:23,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093371816] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:05:23,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922529921] [2022-12-13 20:05:23,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:05:23,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:05:23,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:05:23,697 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:05:23,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 20:05:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:05:23,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 20:05:23,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:05:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:05:23,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:05:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:05:23,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922529921] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:05:23,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:05:23,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-13 20:05:23,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158347153] [2022-12-13 20:05:23,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:05:23,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 20:05:23,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:05:23,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 20:05:23,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-13 20:05:23,829 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:23,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:05:23,919 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2022-12-13 20:05:23,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:05:23,920 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 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 21 [2022-12-13 20:05:23,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:05:23,920 INFO L225 Difference]: With dead ends: 62 [2022-12-13 20:05:23,920 INFO L226 Difference]: Without dead ends: 38 [2022-12-13 20:05:23,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:05:23,922 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:05:23,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:05:23,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-13 20:05:23,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2022-12-13 20:05:23,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:23,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-12-13 20:05:23,928 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2022-12-13 20:05:23,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:05:23,928 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-12-13 20:05:23,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:23,928 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-12-13 20:05:23,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 20:05:23,929 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:05:23,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:05:23,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 20:05:24,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:05:24,130 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:05:24,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:05:24,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1394926352, now seen corresponding path program 2 times [2022-12-13 20:05:24,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:05:24,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901158803] [2022-12-13 20:05:24,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:05:24,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:05:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:05:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:05:24,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:05:24,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901158803] [2022-12-13 20:05:24,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901158803] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:05:24,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537736180] [2022-12-13 20:05:24,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:05:24,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:05:24,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:05:24,728 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:05:24,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 20:05:24,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:05:24,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:05:24,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 20:05:24,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:05:24,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 24 [2022-12-13 20:05:24,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-13 20:05:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 20:05:24,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:05:25,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-13 20:05:25,024 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 20:05:25,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 28 [2022-12-13 20:05:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 20:05:25,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537736180] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:05:25,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:05:25,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 24 [2022-12-13 20:05:25,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105540417] [2022-12-13 20:05:25,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:05:25,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 20:05:25,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:05:25,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 20:05:25,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-12-13 20:05:25,063 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:25,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:05:25,630 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-12-13 20:05:25,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 20:05:25,631 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-13 20:05:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:05:25,631 INFO L225 Difference]: With dead ends: 61 [2022-12-13 20:05:25,631 INFO L226 Difference]: Without dead ends: 59 [2022-12-13 20:05:25,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=453, Invalid=1709, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 20:05:25,632 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 156 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:05:25,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 85 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:05:25,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-13 20:05:25,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2022-12-13 20:05:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:25,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-12-13 20:05:25,637 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 26 [2022-12-13 20:05:25,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:05:25,638 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-12-13 20:05:25,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:25,638 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-12-13 20:05:25,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 20:05:25,639 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:05:25,639 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:05:25,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 20:05:25,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:05:25,840 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:05:25,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:05:25,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1446324666, now seen corresponding path program 3 times [2022-12-13 20:05:25,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:05:25,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492896233] [2022-12-13 20:05:25,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:05:25,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:05:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:05:25,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 20:05:25,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:05:25,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492896233] [2022-12-13 20:05:25,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492896233] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:05:25,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224476371] [2022-12-13 20:05:25,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:05:25,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:05:25,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:05:25,946 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:05:25,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 20:05:26,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 20:05:26,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:05:26,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 20:05:26,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:05:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 20:05:26,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:05:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 20:05:26,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224476371] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:05:26,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:05:26,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-13 20:05:26,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62946206] [2022-12-13 20:05:26,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:05:26,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 20:05:26,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:05:26,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 20:05:26,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:05:26,129 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:26,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:05:26,254 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2022-12-13 20:05:26,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 20:05:26,254 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 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 30 [2022-12-13 20:05:26,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:05:26,255 INFO L225 Difference]: With dead ends: 82 [2022-12-13 20:05:26,255 INFO L226 Difference]: Without dead ends: 47 [2022-12-13 20:05:26,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-12-13 20:05:26,256 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 52 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:05:26,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 74 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:05:26,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-13 20:05:26,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2022-12-13 20:05:26,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:26,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-12-13 20:05:26,263 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 30 [2022-12-13 20:05:26,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:05:26,263 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-12-13 20:05:26,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:26,263 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-12-13 20:05:26,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 20:05:26,264 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:05:26,264 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:05:26,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 20:05:26,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 20:05:26,466 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:05:26,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:05:26,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1754360412, now seen corresponding path program 4 times [2022-12-13 20:05:26,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:05:26,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338676024] [2022-12-13 20:05:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:05:26,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:05:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:05:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:05:27,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:05:27,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338676024] [2022-12-13 20:05:27,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338676024] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:05:27,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763217093] [2022-12-13 20:05:27,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:05:27,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:05:27,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:05:27,157 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:05:27,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 20:05:27,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:05:27,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:05:27,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 20:05:27,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:05:27,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-12-13 20:05:27,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-12-13 20:05:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:05:27,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:05:27,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-13 20:05:27,485 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 20:05:27,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 28 [2022-12-13 20:05:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:05:27,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763217093] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:05:27,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:05:27,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 32 [2022-12-13 20:05:27,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240174973] [2022-12-13 20:05:27,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:05:27,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 20:05:27,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:05:27,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 20:05:27,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-12-13 20:05:27,506 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:28,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:05:28,285 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-12-13 20:05:28,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-13 20:05:28,286 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 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 35 [2022-12-13 20:05:28,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:05:28,287 INFO L225 Difference]: With dead ends: 75 [2022-12-13 20:05:28,287 INFO L226 Difference]: Without dead ends: 73 [2022-12-13 20:05:28,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=3177, Unknown=0, NotChecked=0, Total=3782 [2022-12-13 20:05:28,290 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 205 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:05:28,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 138 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:05:28,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-12-13 20:05:28,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2022-12-13 20:05:28,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:28,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-12-13 20:05:28,298 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 35 [2022-12-13 20:05:28,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:05:28,298 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-12-13 20:05:28,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:28,299 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-12-13 20:05:28,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 20:05:28,299 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:05:28,299 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:05:28,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 20:05:28,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:05:28,501 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:05:28,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:05:28,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1980833498, now seen corresponding path program 5 times [2022-12-13 20:05:28,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:05:28,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682856557] [2022-12-13 20:05:28,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:05:28,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:05:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:05:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 20:05:28,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:05:28,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682856557] [2022-12-13 20:05:28,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682856557] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:05:28,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073947300] [2022-12-13 20:05:28,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:05:28,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:05:28,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:05:28,630 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:05:28,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 20:05:28,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 20:05:28,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:05:28,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 20:05:28,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:05:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:05:28,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:05:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:05:28,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073947300] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:05:28,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:05:28,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-12-13 20:05:28,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34395109] [2022-12-13 20:05:28,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:05:28,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 20:05:28,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:05:28,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 20:05:28,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-12-13 20:05:28,868 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:28,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:05:28,985 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2022-12-13 20:05:28,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 20:05:28,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 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 39 [2022-12-13 20:05:28,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:05:28,986 INFO L225 Difference]: With dead ends: 102 [2022-12-13 20:05:28,986 INFO L226 Difference]: Without dead ends: 56 [2022-12-13 20:05:28,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-12-13 20:05:28,988 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 96 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:05:28,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 56 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:05:28,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-13 20:05:28,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2022-12-13 20:05:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:28,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-12-13 20:05:28,993 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 39 [2022-12-13 20:05:28,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:05:28,993 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-12-13 20:05:28,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:28,993 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-12-13 20:05:28,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 20:05:28,993 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:05:28,993 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:05:28,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 20:05:29,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:05:29,194 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:05:29,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:05:29,195 INFO L85 PathProgramCache]: Analyzing trace with hash -249765768, now seen corresponding path program 6 times [2022-12-13 20:05:29,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:05:29,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097945373] [2022-12-13 20:05:29,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:05:29,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:05:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:05:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:05:29,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:05:29,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097945373] [2022-12-13 20:05:29,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097945373] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:05:29,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948344576] [2022-12-13 20:05:29,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:05:29,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:05:29,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:05:29,702 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:05:29,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 20:05:29,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 20:05:29,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:05:29,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 20:05:29,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:05:29,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-12-13 20:05:30,216 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-13 20:05:30,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-12-13 20:05:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:05:30,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:05:30,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 62 [2022-12-13 20:05:30,660 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 20:05:30,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 62 [2022-12-13 20:05:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:05:30,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948344576] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:05:30,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:05:30,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 43 [2022-12-13 20:05:30,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997728492] [2022-12-13 20:05:30,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:05:30,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 20:05:30,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:05:30,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 20:05:30,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1539, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 20:05:30,710 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:35,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:05:35,676 INFO L93 Difference]: Finished difference Result 146 states and 164 transitions. [2022-12-13 20:05:35,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-12-13 20:05:35,676 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 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 44 [2022-12-13 20:05:35,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:05:35,677 INFO L225 Difference]: With dead ends: 146 [2022-12-13 20:05:35,677 INFO L226 Difference]: Without dead ends: 105 [2022-12-13 20:05:35,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4769 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2006, Invalid=13000, Unknown=0, NotChecked=0, Total=15006 [2022-12-13 20:05:35,679 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 585 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 204 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:05:35,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 207 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 724 Invalid, 3 Unknown, 0 Unchecked, 2.2s Time] [2022-12-13 20:05:35,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-13 20:05:35,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 59. [2022-12-13 20:05:35,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-12-13 20:05:35,687 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 44 [2022-12-13 20:05:35,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:05:35,687 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-12-13 20:05:35,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:35,687 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-12-13 20:05:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 20:05:35,687 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:05:35,687 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:05:35,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 20:05:35,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 20:05:35,888 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:05:35,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:05:35,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1069344934, now seen corresponding path program 1 times [2022-12-13 20:05:35,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:05:35,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20644114] [2022-12-13 20:05:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:05:35,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:05:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:05:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 20:05:36,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:05:36,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20644114] [2022-12-13 20:05:36,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20644114] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:05:36,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459045507] [2022-12-13 20:05:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:05:36,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:05:36,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:05:36,005 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:05:36,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 20:05:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:05:36,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 20:05:36,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:05:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 20:05:36,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:05:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 20:05:36,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459045507] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:05:36,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:05:36,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-12-13 20:05:36,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975181961] [2022-12-13 20:05:36,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:05:36,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 20:05:36,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:05:36,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 20:05:36,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-12-13 20:05:36,231 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:36,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:05:36,360 INFO L93 Difference]: Finished difference Result 138 states and 159 transitions. [2022-12-13 20:05:36,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 20:05:36,360 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-12-13 20:05:36,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:05:36,361 INFO L225 Difference]: With dead ends: 138 [2022-12-13 20:05:36,361 INFO L226 Difference]: Without dead ends: 91 [2022-12-13 20:05:36,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 77 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-12-13 20:05:36,362 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 129 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:05:36,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 55 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:05:36,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-12-13 20:05:36,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 61. [2022-12-13 20:05:36,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-12-13 20:05:36,369 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 47 [2022-12-13 20:05:36,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:05:36,369 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-12-13 20:05:36,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-12-13 20:05:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 20:05:36,370 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:05:36,370 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:05:36,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 20:05:36,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:05:36,570 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:05:36,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:05:36,571 INFO L85 PathProgramCache]: Analyzing trace with hash 753514012, now seen corresponding path program 2 times [2022-12-13 20:05:36,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:05:36,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708395679] [2022-12-13 20:05:36,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:05:36,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:05:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:05:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:05:37,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:05:37,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708395679] [2022-12-13 20:05:37,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708395679] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:05:37,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241789899] [2022-12-13 20:05:37,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:05:37,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:05:37,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:05:37,036 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:05:37,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 20:05:37,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:05:37,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:05:37,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 20:05:37,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:05:37,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 20:05:37,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:05:37,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 20:05:37,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 20:05:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 20:05:37,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:05:37,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-13 20:05:37,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2022-12-13 20:05:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 20:05:37,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241789899] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:05:37,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:05:37,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 14] total 43 [2022-12-13 20:05:37,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027463852] [2022-12-13 20:05:37,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:05:37,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 20:05:37,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:05:37,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 20:05:37,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1560, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 20:05:37,728 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:38,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:05:38,630 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2022-12-13 20:05:38,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 20:05:38,631 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 states have internal predecessors, (124), 0 states have call successors, (0), 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 49 [2022-12-13 20:05:38,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:05:38,631 INFO L225 Difference]: With dead ends: 116 [2022-12-13 20:05:38,631 INFO L226 Difference]: Without dead ends: 114 [2022-12-13 20:05:38,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=783, Invalid=4767, Unknown=0, NotChecked=0, Total=5550 [2022-12-13 20:05:38,633 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 185 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:05:38,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 451 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 20:05:38,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-12-13 20:05:38,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 66. [2022-12-13 20:05:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2) internal successors, (78), 65 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:38,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2022-12-13 20:05:38,641 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 49 [2022-12-13 20:05:38,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:05:38,641 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2022-12-13 20:05:38,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:38,642 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2022-12-13 20:05:38,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 20:05:38,642 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:05:38,642 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:05:38,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 20:05:38,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 20:05:38,844 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:05:38,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:05:38,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1207788408, now seen corresponding path program 3 times [2022-12-13 20:05:38,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:05:38,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586729101] [2022-12-13 20:05:38,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:05:38,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:05:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:05:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 20:05:39,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:05:39,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586729101] [2022-12-13 20:05:39,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586729101] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:05:39,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43108854] [2022-12-13 20:05:39,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:05:39,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:05:39,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:05:39,017 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:05:39,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 20:05:39,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 20:05:39,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:05:39,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 20:05:39,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:05:39,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-12-13 20:05:39,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-12-13 20:05:39,590 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:05:39,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 38 [2022-12-13 20:05:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 41 proven. 31 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 20:05:39,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:05:40,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 48 [2022-12-13 20:05:40,183 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 20:05:40,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 187 [2022-12-13 20:05:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 20:05:40,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43108854] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:05:40,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:05:40,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 22] total 42 [2022-12-13 20:05:40,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64751275] [2022-12-13 20:05:40,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:05:40,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 20:05:40,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:05:40,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 20:05:40,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1416, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 20:05:40,269 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:44,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:05:44,176 INFO L93 Difference]: Finished difference Result 276 states and 322 transitions. [2022-12-13 20:05:44,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-12-13 20:05:44,176 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-12-13 20:05:44,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:05:44,178 INFO L225 Difference]: With dead ends: 276 [2022-12-13 20:05:44,178 INFO L226 Difference]: Without dead ends: 140 [2022-12-13 20:05:44,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 70 SyntacticMatches, 7 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8560 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3604, Invalid=20888, Unknown=0, NotChecked=0, Total=24492 [2022-12-13 20:05:44,181 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 661 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 20:05:44,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 259 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 20:05:44,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-12-13 20:05:44,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 94. [2022-12-13 20:05:44,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 93 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2022-12-13 20:05:44,194 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 52 [2022-12-13 20:05:44,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:05:44,195 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2022-12-13 20:05:44,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2022-12-13 20:05:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 20:05:44,195 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:05:44,195 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:05:44,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 20:05:44,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 20:05:44,397 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:05:44,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:05:44,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1143624202, now seen corresponding path program 4 times [2022-12-13 20:05:44,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:05:44,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467735288] [2022-12-13 20:05:44,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:05:44,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:05:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:05:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:05:45,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:05:45,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467735288] [2022-12-13 20:05:45,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467735288] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:05:45,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051082344] [2022-12-13 20:05:45,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:05:45,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:05:45,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:05:45,225 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:05:45,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 20:05:45,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:05:45,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:05:45,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 20:05:45,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:05:45,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-12-13 20:05:45,389 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-13 20:05:45,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-12-13 20:05:45,426 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-13 20:05:45,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-12-13 20:05:45,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-12-13 20:05:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 20:05:45,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:06:05,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-12-13 20:06:05,549 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 20:06:05,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 66 [2022-12-13 20:06:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 63 refuted. 5 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-13 20:06:05,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051082344] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:06:05,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:06:05,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 15, 16] total 48 [2022-12-13 20:06:05,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925970618] [2022-12-13 20:06:05,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:06:05,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 20:06:05,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:06:05,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 20:06:05,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=2016, Unknown=8, NotChecked=0, Total=2256 [2022-12-13 20:06:05,586 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand has 48 states, 48 states have (on average 2.4375) internal successors, (117), 48 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:06:16,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:06:16,032 INFO L93 Difference]: Finished difference Result 173 states and 188 transitions. [2022-12-13 20:06:16,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-13 20:06:16,032 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 48 states have internal predecessors, (117), 0 states have call successors, (0), 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 54 [2022-12-13 20:06:16,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:06:16,033 INFO L225 Difference]: With dead ends: 173 [2022-12-13 20:06:16,033 INFO L226 Difference]: Without dead ends: 152 [2022-12-13 20:06:16,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=1132, Invalid=8562, Unknown=8, NotChecked=0, Total=9702 [2022-12-13 20:06:16,034 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 318 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 114 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:06:16,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 322 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1167 Invalid, 1 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 20:06:16,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-12-13 20:06:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 83. [2022-12-13 20:06:16,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:06:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2022-12-13 20:06:16,046 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 54 [2022-12-13 20:06:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:06:16,047 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2022-12-13 20:06:16,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 48 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:06:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2022-12-13 20:06:16,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 20:06:16,047 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:06:16,047 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:06:16,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 20:06:16,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 20:06:16,249 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:06:16,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:06:16,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1496823660, now seen corresponding path program 5 times [2022-12-13 20:06:16,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:06:16,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741844979] [2022-12-13 20:06:16,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:06:16,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:06:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:06:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 16 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 20:06:16,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:06:16,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741844979] [2022-12-13 20:06:16,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741844979] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:06:16,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146404981] [2022-12-13 20:06:16,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:06:16,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:06:16,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:06:16,438 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:06:16,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 20:06:16,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-13 20:06:16,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:06:16,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 20:06:16,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:06:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 20:06:16,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:06:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 20:06:16,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146404981] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:06:16,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:06:16,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-12-13 20:06:16,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186327168] [2022-12-13 20:06:16,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:06:16,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 20:06:16,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:06:16,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 20:06:16,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-12-13 20:06:16,799 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:06:16,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:06:16,999 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2022-12-13 20:06:16,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 20:06:16,999 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 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 55 [2022-12-13 20:06:16,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:06:16,999 INFO L225 Difference]: With dead ends: 101 [2022-12-13 20:06:16,999 INFO L226 Difference]: Without dead ends: 80 [2022-12-13 20:06:17,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 20:06:17,000 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 211 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:06:17,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 104 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:06:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-13 20:06:17,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2022-12-13 20:06:17,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:06:17,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-12-13 20:06:17,009 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 55 [2022-12-13 20:06:17,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:06:17,009 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-12-13 20:06:17,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:06:17,009 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-12-13 20:06:17,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 20:06:17,009 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:06:17,009 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:06:17,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 20:06:17,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 20:06:17,211 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:06:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:06:17,212 INFO L85 PathProgramCache]: Analyzing trace with hash -783512662, now seen corresponding path program 7 times [2022-12-13 20:06:17,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:06:17,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934238145] [2022-12-13 20:06:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:06:17,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:06:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:06:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:06:17,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:06:17,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934238145] [2022-12-13 20:06:17,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934238145] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:06:17,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121808149] [2022-12-13 20:06:17,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:06:17,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:06:17,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:06:17,939 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:06:17,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 20:06:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:06:18,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 20:06:18,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:06:18,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-12-13 20:06:18,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:06:18,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-12-13 20:06:18,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-13 20:06:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 20:06:18,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:06:27,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-12-13 20:06:27,751 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 20:06:27,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 66 [2022-12-13 20:06:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 80 refuted. 3 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 20:06:27,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121808149] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:06:27,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:06:27,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17, 17] total 49 [2022-12-13 20:06:27,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893078761] [2022-12-13 20:06:27,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:06:27,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 20:06:27,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:06:27,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 20:06:27,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2111, Unknown=8, NotChecked=0, Total=2352 [2022-12-13 20:06:27,792 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:06:34,783 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 49 DAG size of output: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:06:39,982 WARN L233 SmtUtils]: Spent 5.09s on a formula simplification. DAG size of input: 51 DAG size of output: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:06:46,101 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 44 DAG size of output: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:06:53,119 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 51 DAG size of output: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:06:59,301 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 52 DAG size of output: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:07:05,434 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 47 DAG size of output: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:07:05,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:07:05,438 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2022-12-13 20:07:05,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-13 20:07:05,439 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-12-13 20:07:05,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:07:05,440 INFO L225 Difference]: With dead ends: 107 [2022-12-13 20:07:05,440 INFO L226 Difference]: Without dead ends: 105 [2022-12-13 20:07:05,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2662 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=1079, Invalid=8615, Unknown=8, NotChecked=0, Total=9702 [2022-12-13 20:07:05,441 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 322 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 20:07:05,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 308 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 20:07:05,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-13 20:07:05,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 63. [2022-12-13 20:07:05,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:05,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2022-12-13 20:07:05,451 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 58 [2022-12-13 20:07:05,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:07:05,451 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2022-12-13 20:07:05,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:05,451 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2022-12-13 20:07:05,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-13 20:07:05,451 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:07:05,451 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:07:05,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 20:07:05,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:07:05,653 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:07:05,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:07:05,654 INFO L85 PathProgramCache]: Analyzing trace with hash 72917472, now seen corresponding path program 8 times [2022-12-13 20:07:05,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:07:05,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938232621] [2022-12-13 20:07:05,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:07:05,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:07:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:07:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:07:06,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:07:06,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938232621] [2022-12-13 20:07:06,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938232621] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:07:06,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257568230] [2022-12-13 20:07:06,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:07:06,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:07:06,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:07:06,110 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:07:06,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 20:07:06,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:07:06,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:07:06,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 20:07:06,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:07:06,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-12-13 20:07:06,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-13 20:07:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:07:06,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:07:06,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-13 20:07:06,826 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 20:07:06,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 28 [2022-12-13 20:07:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 20:07:06,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257568230] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:07:06,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:07:06,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 42 [2022-12-13 20:07:06,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350429739] [2022-12-13 20:07:06,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:07:06,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 20:07:06,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:07:06,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 20:07:06,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1555, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 20:07:06,862 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 42 states, 42 states have (on average 3.5238095238095237) internal successors, (148), 42 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:07:08,019 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2022-12-13 20:07:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 20:07:08,019 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.5238095238095237) internal successors, (148), 42 states have internal predecessors, (148), 0 states have call successors, (0), 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 62 [2022-12-13 20:07:08,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:07:08,020 INFO L225 Difference]: With dead ends: 117 [2022-12-13 20:07:08,020 INFO L226 Difference]: Without dead ends: 115 [2022-12-13 20:07:08,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 100 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=523, Invalid=4879, Unknown=0, NotChecked=0, Total=5402 [2022-12-13 20:07:08,021 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 158 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:07:08,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 330 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 20:07:08,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-13 20:07:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 67. [2022-12-13 20:07:08,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 66 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2022-12-13 20:07:08,032 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 62 [2022-12-13 20:07:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:07:08,032 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2022-12-13 20:07:08,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5238095238095237) internal successors, (148), 42 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:08,032 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2022-12-13 20:07:08,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-13 20:07:08,033 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:07:08,033 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:07:08,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 20:07:08,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 20:07:08,234 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:07:08,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:07:08,235 INFO L85 PathProgramCache]: Analyzing trace with hash 174238998, now seen corresponding path program 9 times [2022-12-13 20:07:08,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:07:08,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885902740] [2022-12-13 20:07:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:07:08,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:07:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:07:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 51 proven. 57 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 20:07:08,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:07:08,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885902740] [2022-12-13 20:07:08,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885902740] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:07:08,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947048799] [2022-12-13 20:07:08,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:07:08,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:07:08,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:07:08,438 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:07:08,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 20:07:08,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 20:07:08,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:07:08,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 20:07:08,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:07:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 20:07:08,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:07:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 20:07:08,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947048799] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:07:08,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:07:08,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-12-13 20:07:08,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074929422] [2022-12-13 20:07:08,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:07:08,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 20:07:08,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:07:08,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 20:07:08,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-12-13 20:07:08,907 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:09,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:07:09,115 INFO L93 Difference]: Finished difference Result 162 states and 183 transitions. [2022-12-13 20:07:09,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 20:07:09,116 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 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 66 [2022-12-13 20:07:09,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:07:09,116 INFO L225 Difference]: With dead ends: 162 [2022-12-13 20:07:09,116 INFO L226 Difference]: Without dead ends: 83 [2022-12-13 20:07:09,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 14 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 20:07:09,117 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 161 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:07:09,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 111 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:07:09,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-12-13 20:07:09,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2022-12-13 20:07:09,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:09,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2022-12-13 20:07:09,129 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 66 [2022-12-13 20:07:09,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:07:09,129 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2022-12-13 20:07:09,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:09,129 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2022-12-13 20:07:09,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 20:07:09,129 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:07:09,129 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:07:09,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 20:07:09,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 20:07:09,331 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:07:09,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:07:09,332 INFO L85 PathProgramCache]: Analyzing trace with hash -695424892, now seen corresponding path program 10 times [2022-12-13 20:07:09,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:07:09,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361514658] [2022-12-13 20:07:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:07:09,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:07:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:07:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:07:09,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:07:09,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361514658] [2022-12-13 20:07:09,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361514658] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:07:09,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72376542] [2022-12-13 20:07:09,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:07:09,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:07:09,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:07:09,903 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:07:09,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 20:07:09,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:07:09,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:07:09,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 20:07:09,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:07:10,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-12-13 20:07:10,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-12-13 20:07:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-13 20:07:10,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:07:10,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-13 20:07:10,409 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 20:07:10,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 28 [2022-12-13 20:07:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-13 20:07:10,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72376542] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:07:10,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:07:10,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 36 [2022-12-13 20:07:10,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580795159] [2022-12-13 20:07:10,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:07:10,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 20:07:10,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:07:10,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 20:07:10,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1144, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 20:07:10,443 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 36 states, 36 states have (on average 3.611111111111111) internal successors, (130), 36 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:11,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:07:11,585 INFO L93 Difference]: Finished difference Result 131 states and 144 transitions. [2022-12-13 20:07:11,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-13 20:07:11,585 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.611111111111111) internal successors, (130), 36 states have internal predecessors, (130), 0 states have call successors, (0), 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 71 [2022-12-13 20:07:11,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:07:11,586 INFO L225 Difference]: With dead ends: 131 [2022-12-13 20:07:11,586 INFO L226 Difference]: Without dead ends: 129 [2022-12-13 20:07:11,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 123 SyntacticMatches, 11 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=392, Invalid=4438, Unknown=0, NotChecked=0, Total=4830 [2022-12-13 20:07:11,587 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 132 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:07:11,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 352 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 20:07:11,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-13 20:07:11,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 76. [2022-12-13 20:07:11,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:11,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2022-12-13 20:07:11,607 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 71 [2022-12-13 20:07:11,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:07:11,607 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2022-12-13 20:07:11,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.611111111111111) internal successors, (130), 36 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:11,608 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2022-12-13 20:07:11,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 20:07:11,608 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:07:11,608 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:07:11,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 20:07:11,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 20:07:11,809 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:07:11,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:07:11,810 INFO L85 PathProgramCache]: Analyzing trace with hash 2802106, now seen corresponding path program 11 times [2022-12-13 20:07:11,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:07:11,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868175033] [2022-12-13 20:07:11,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:07:11,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:07:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:07:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 73 proven. 74 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-13 20:07:12,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:07:12,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868175033] [2022-12-13 20:07:12,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868175033] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:07:12,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831081133] [2022-12-13 20:07:12,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:07:12,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:07:12,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:07:12,079 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:07:12,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 20:07:12,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-12-13 20:07:12,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:07:12,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 20:07:12,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:07:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 98 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-13 20:07:12,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:07:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 98 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-13 20:07:12,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831081133] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:07:12,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:07:12,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-12-13 20:07:12,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321862729] [2022-12-13 20:07:12,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:07:12,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 20:07:12,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:07:12,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 20:07:12,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-12-13 20:07:12,707 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:12,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:07:12,962 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2022-12-13 20:07:12,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 20:07:12,962 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 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 75 [2022-12-13 20:07:12,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:07:12,962 INFO L225 Difference]: With dead ends: 182 [2022-12-13 20:07:12,962 INFO L226 Difference]: Without dead ends: 92 [2022-12-13 20:07:12,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 124 SyntacticMatches, 16 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 20:07:12,963 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 335 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:07:12,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 123 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:07:12,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-12-13 20:07:12,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2022-12-13 20:07:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1375) internal successors, (91), 80 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2022-12-13 20:07:12,977 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 75 [2022-12-13 20:07:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:07:12,977 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2022-12-13 20:07:12,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:12,977 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2022-12-13 20:07:12,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-13 20:07:12,978 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:07:12,978 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:07:12,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 20:07:13,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:07:13,179 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:07:13,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:07:13,181 INFO L85 PathProgramCache]: Analyzing trace with hash 122414920, now seen corresponding path program 12 times [2022-12-13 20:07:13,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:07:13,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676290334] [2022-12-13 20:07:13,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:07:13,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:07:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:07:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:07:14,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:07:14,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676290334] [2022-12-13 20:07:14,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676290334] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:07:14,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007947686] [2022-12-13 20:07:14,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:07:14,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:07:14,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:07:14,404 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:07:14,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 20:07:14,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-12-13 20:07:14,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:07:14,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 20:07:14,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:07:14,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-12-13 20:07:14,977 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:07:14,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 34 [2022-12-13 20:07:15,993 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-12-13 20:07:15,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2022-12-13 20:07:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 131 proven. 72 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 20:07:16,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:07:17,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 67 [2022-12-13 20:07:17,411 INFO L321 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2022-12-13 20:07:17,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 135 treesize of output 96 [2022-12-13 20:07:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 78 proven. 125 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 20:07:17,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007947686] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:07:17,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:07:17,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 29, 29] total 78 [2022-12-13 20:07:17,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224046422] [2022-12-13 20:07:17,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:07:17,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-12-13 20:07:17,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:07:17,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-12-13 20:07:17,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=5252, Unknown=0, NotChecked=0, Total=6006 [2022-12-13 20:07:17,727 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 78 states, 78 states have (on average 2.371794871794872) internal successors, (185), 78 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) [2022-12-13 20:07:19,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:07:46,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 20:08:08,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 20:08:09,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 20:08:12,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 20:08:18,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:08:18,035 INFO L93 Difference]: Finished difference Result 460 states and 536 transitions. [2022-12-13 20:08:18,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2022-12-13 20:08:18,035 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.371794871794872) internal successors, (185), 78 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 80 [2022-12-13 20:08:18,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:08:18,036 INFO L225 Difference]: With dead ends: 460 [2022-12-13 20:08:18,037 INFO L226 Difference]: Without dead ends: 207 [2022-12-13 20:08:18,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 114 SyntacticMatches, 8 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40971 ImplicationChecksByTransitivity, 48.5s TimeCoverageRelationStatistics Valid=13251, Invalid=102676, Unknown=13, NotChecked=0, Total=115940 [2022-12-13 20:08:18,043 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1986 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 2983 mSolverCounterSat, 838 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1986 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 3832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 838 IncrementalHoareTripleChecker+Valid, 2983 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:08:18,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1986 Valid, 786 Invalid, 3832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [838 Valid, 2983 Invalid, 11 Unknown, 0 Unchecked, 14.3s Time] [2022-12-13 20:08:18,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-12-13 20:08:18,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 160. [2022-12-13 20:08:18,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.1635220125786163) internal successors, (185), 159 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) [2022-12-13 20:08:18,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 185 transitions. [2022-12-13 20:08:18,083 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 185 transitions. Word has length 80 [2022-12-13 20:08:18,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:08:18,083 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 185 transitions. [2022-12-13 20:08:18,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.371794871794872) internal successors, (185), 78 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) [2022-12-13 20:08:18,083 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 185 transitions. [2022-12-13 20:08:18,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-13 20:08:18,084 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:08:18,084 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:08:18,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 20:08:18,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:08:18,285 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:08:18,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:08:18,286 INFO L85 PathProgramCache]: Analyzing trace with hash 269912896, now seen corresponding path program 6 times [2022-12-13 20:08:18,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:08:18,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256509022] [2022-12-13 20:08:18,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:08:18,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:08:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:08:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:08:19,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:08:19,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256509022] [2022-12-13 20:08:19,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256509022] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:08:19,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150587396] [2022-12-13 20:08:19,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:08:19,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:08:19,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:08:19,423 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:08:19,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 20:08:20,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-12-13 20:08:20,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:08:20,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-13 20:08:20,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:08:20,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-12-13 20:08:20,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-12-13 20:08:22,822 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2022-12-13 20:08:22,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 15 [2022-12-13 20:08:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 44 proven. 182 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-13 20:08:22,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:08:23,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2022-12-13 20:08:23,660 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 20:08:23,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 147 [2022-12-13 20:08:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 233 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-13 20:08:24,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150587396] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:08:24,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:08:24,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 31, 32] total 86 [2022-12-13 20:08:24,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546719784] [2022-12-13 20:08:24,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:08:24,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-12-13 20:08:24,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:08:24,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-12-13 20:08:24,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=6489, Unknown=1, NotChecked=0, Total=7310 [2022-12-13 20:08:24,246 INFO L87 Difference]: Start difference. First operand 160 states and 185 transitions. Second operand has 86 states, 86 states have (on average 2.244186046511628) internal successors, (193), 86 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:08:26,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:08:35,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:08:59,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:09:17,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:09:21,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:09:35,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:09:47,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:09:47,323 INFO L93 Difference]: Finished difference Result 414 states and 468 transitions. [2022-12-13 20:09:47,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2022-12-13 20:09:47,324 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.244186046511628) internal successors, (193), 86 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-12-13 20:09:47,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:09:47,325 INFO L225 Difference]: With dead ends: 414 [2022-12-13 20:09:47,325 INFO L226 Difference]: Without dead ends: 361 [2022-12-13 20:09:47,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36642 ImplicationChecksByTransitivity, 69.1s TimeCoverageRelationStatistics Valid=8859, Invalid=100333, Unknown=38, NotChecked=0, Total=109230 [2022-12-13 20:09:47,329 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1339 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 3382 mSolverCounterSat, 635 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 4029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 635 IncrementalHoareTripleChecker+Valid, 3382 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2022-12-13 20:09:47,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1339 Valid, 1037 Invalid, 4029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [635 Valid, 3382 Invalid, 12 Unknown, 0 Unchecked, 17.6s Time] [2022-12-13 20:09:47,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-12-13 20:09:47,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 172. [2022-12-13 20:09:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.1578947368421053) internal successors, (198), 171 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:09:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 198 transitions. [2022-12-13 20:09:47,373 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 198 transitions. Word has length 85 [2022-12-13 20:09:47,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:09:47,374 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 198 transitions. [2022-12-13 20:09:47,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.244186046511628) internal successors, (193), 86 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:09:47,374 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 198 transitions. [2022-12-13 20:09:47,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-13 20:09:47,374 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:09:47,374 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:09:47,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 20:09:47,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:09:47,576 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:09:47,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:09:47,577 INFO L85 PathProgramCache]: Analyzing trace with hash -686337868, now seen corresponding path program 7 times [2022-12-13 20:09:47,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:09:47,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378787894] [2022-12-13 20:09:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:09:47,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:09:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:09:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:09:48,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:09:48,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378787894] [2022-12-13 20:09:48,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378787894] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:09:48,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119196331] [2022-12-13 20:09:48,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:09:48,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:09:48,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:09:48,583 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:09:48,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 20:09:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:09:48,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-13 20:09:48,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:09:48,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 20:09:49,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 20:09:49,478 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:09:49,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:09:49,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-13 20:09:49,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-12-13 20:09:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-13 20:09:49,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119196331] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:09:49,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:09:49,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 23, 22] total 57 [2022-12-13 20:09:49,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504417170] [2022-12-13 20:09:49,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:09:49,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 20:09:49,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:09:49,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 20:09:49,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2926, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 20:09:49,629 INFO L87 Difference]: Start difference. First operand 172 states and 198 transitions. Second operand has 57 states, 57 states have (on average 3.7017543859649122) internal successors, (211), 57 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:09:52,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:09:52,299 INFO L93 Difference]: Finished difference Result 317 states and 347 transitions. [2022-12-13 20:09:52,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-12-13 20:09:52,300 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.7017543859649122) internal successors, (211), 57 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-12-13 20:09:52,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:09:52,300 INFO L225 Difference]: With dead ends: 317 [2022-12-13 20:09:52,300 INFO L226 Difference]: Without dead ends: 242 [2022-12-13 20:09:52,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 157 SyntacticMatches, 3 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3844 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1367, Invalid=12675, Unknown=0, NotChecked=0, Total=14042 [2022-12-13 20:09:52,301 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 450 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 2400 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 2507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 20:09:52,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 714 Invalid, 2507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2400 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 20:09:52,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-12-13 20:09:52,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 150. [2022-12-13 20:09:52,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.1409395973154361) internal successors, (170), 149 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:09:52,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2022-12-13 20:09:52,357 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 89 [2022-12-13 20:09:52,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:09:52,357 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2022-12-13 20:09:52,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.7017543859649122) internal successors, (211), 57 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:09:52,357 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2022-12-13 20:09:52,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-13 20:09:52,358 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:09:52,358 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:09:52,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 20:09:52,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:09:52,559 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:09:52,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:09:52,560 INFO L85 PathProgramCache]: Analyzing trace with hash 561416516, now seen corresponding path program 13 times [2022-12-13 20:09:52,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:09:52,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147396563] [2022-12-13 20:09:52,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:09:52,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:09:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:09:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 1 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:09:53,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:09:53,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147396563] [2022-12-13 20:09:53,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147396563] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:09:53,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368989104] [2022-12-13 20:09:53,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:09:53,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:09:53,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:09:53,636 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:09:53,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 20:09:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:09:53,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-13 20:09:53,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:09:54,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-12-13 20:09:54,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:09:54,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-12-13 20:09:54,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:09:54,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-12-13 20:09:54,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-13 20:09:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 2 proven. 332 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:09:54,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:10:46,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-12-13 20:10:46,462 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 20:10:46,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 66 [2022-12-13 20:10:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 227 refuted. 15 times theorem prover too weak. 101 trivial. 0 not checked. [2022-12-13 20:10:46,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368989104] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:10:46,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:10:46,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 24, 24] total 71 [2022-12-13 20:10:46,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124885575] [2022-12-13 20:10:46,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:10:46,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-13 20:10:46,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:10:46,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-13 20:10:46,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=4557, Unknown=24, NotChecked=0, Total=4970 [2022-12-13 20:10:46,532 INFO L87 Difference]: Start difference. First operand 150 states and 170 transitions. Second operand has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:10:53,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:10:53,920 INFO L93 Difference]: Finished difference Result 250 states and 270 transitions. [2022-12-13 20:10:53,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-12-13 20:10:53,921 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-12-13 20:10:53,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:10:53,921 INFO L225 Difference]: With dead ends: 250 [2022-12-13 20:10:53,921 INFO L226 Difference]: Without dead ends: 248 [2022-12-13 20:10:53,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 143 SyntacticMatches, 4 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6430 ImplicationChecksByTransitivity, 58.9s TimeCoverageRelationStatistics Valid=1897, Invalid=20429, Unknown=24, NotChecked=0, Total=22350 [2022-12-13 20:10:53,923 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 529 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 3156 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 3156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:10:53,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 772 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 3156 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 20:10:53,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-12-13 20:10:53,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 105. [2022-12-13 20:10:53,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1442307692307692) internal successors, (119), 104 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:10:53,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2022-12-13 20:10:53,950 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 90 [2022-12-13 20:10:53,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:10:53,950 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2022-12-13 20:10:53,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:10:53,950 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2022-12-13 20:10:53,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-13 20:10:53,950 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:10:53,950 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:10:53,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-13 20:10:54,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:10:54,151 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:10:54,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:10:54,152 INFO L85 PathProgramCache]: Analyzing trace with hash 230048378, now seen corresponding path program 14 times [2022-12-13 20:10:54,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:10:54,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919313690] [2022-12-13 20:10:54,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:10:54,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:10:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:10:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:10:55,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:10:55,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919313690] [2022-12-13 20:10:55,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919313690] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:10:55,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097116970] [2022-12-13 20:10:55,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:10:55,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:10:55,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:10:55,192 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:10:55,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 20:10:55,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:10:55,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:10:55,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-13 20:10:55,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:10:55,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-12-13 20:10:55,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:10:55,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-12-13 20:10:56,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-13 20:10:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 20:10:56,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:11:25,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-12-13 20:11:25,120 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 20:11:25,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 66 [2022-12-13 20:11:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 266 refuted. 7 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-13 20:11:25,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097116970] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:11:25,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:11:25,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 25, 25] total 73 [2022-12-13 20:11:25,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032680349] [2022-12-13 20:11:25,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:11:25,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-13 20:11:25,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:11:25,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-13 20:11:25,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=4857, Unknown=20, NotChecked=0, Total=5256 [2022-12-13 20:11:25,192 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand has 73 states, 73 states have (on average 3.4383561643835616) internal successors, (251), 73 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:11:38,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:11:38,789 INFO L93 Difference]: Finished difference Result 163 states and 177 transitions. [2022-12-13 20:11:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-12-13 20:11:38,790 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.4383561643835616) internal successors, (251), 73 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-12-13 20:11:38,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:11:38,791 INFO L225 Difference]: With dead ends: 163 [2022-12-13 20:11:38,791 INFO L226 Difference]: Without dead ends: 161 [2022-12-13 20:11:38,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 150 SyntacticMatches, 3 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6236 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=1829, Invalid=20800, Unknown=21, NotChecked=0, Total=22650 [2022-12-13 20:11:38,793 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 480 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 3610 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 3748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 3610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:11:38,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 813 Invalid, 3748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 3610 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-13 20:11:38,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-12-13 20:11:38,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 99. [2022-12-13 20:11:38,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1326530612244898) internal successors, (111), 98 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:11:38,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2022-12-13 20:11:38,837 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 94 [2022-12-13 20:11:38,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:11:38,837 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2022-12-13 20:11:38,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.4383561643835616) internal successors, (251), 73 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:11:38,837 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2022-12-13 20:11:38,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-13 20:11:38,837 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:11:38,837 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:11:38,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 20:11:39,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:11:39,039 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:11:39,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:11:39,040 INFO L85 PathProgramCache]: Analyzing trace with hash -194350928, now seen corresponding path program 15 times [2022-12-13 20:11:39,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:11:39,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714201179] [2022-12-13 20:11:39,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:11:39,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:11:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:11:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:11:40,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:11:40,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714201179] [2022-12-13 20:11:40,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714201179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:11:40,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334593829] [2022-12-13 20:11:40,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:11:40,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:11:40,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:11:40,276 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:11:40,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 20:11:40,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-13 20:11:40,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:11:40,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 20:11:40,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:11:41,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-12-13 20:11:42,349 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-13 20:11:42,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-12-13 20:11:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 153 proven. 154 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-13 20:11:42,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:11:43,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 62 [2022-12-13 20:11:43,617 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 20:11:43,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 62 [2022-12-13 20:11:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 144 proven. 163 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-13 20:11:43,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334593829] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:11:43,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:11:43,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 27, 27] total 78 [2022-12-13 20:11:43,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333736262] [2022-12-13 20:11:43,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:11:43,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-12-13 20:11:43,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:11:43,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-12-13 20:11:43,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=5368, Unknown=0, NotChecked=0, Total=6006 [2022-12-13 20:11:43,862 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 78 states, 78 states have (on average 2.7564102564102564) internal successors, (215), 78 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:11:48,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:12:01,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:12:01,509 INFO L93 Difference]: Finished difference Result 289 states and 319 transitions. [2022-12-13 20:12:01,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-12-13 20:12:01,510 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.7564102564102564) internal successors, (215), 78 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-12-13 20:12:01,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:12:01,511 INFO L225 Difference]: With dead ends: 289 [2022-12-13 20:12:01,511 INFO L226 Difference]: Without dead ends: 200 [2022-12-13 20:12:01,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 149 SyntacticMatches, 10 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15759 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=5349, Invalid=48707, Unknown=0, NotChecked=0, Total=54056 [2022-12-13 20:12:01,514 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1178 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 3093 mSolverCounterSat, 331 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 3427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 3093 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:12:01,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1178 Valid, 871 Invalid, 3427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 3093 Invalid, 3 Unknown, 0 Unchecked, 5.2s Time] [2022-12-13 20:12:01,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-12-13 20:12:01,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 113. [2022-12-13 20:12:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 112 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:12:01,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2022-12-13 20:12:01,549 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 98 [2022-12-13 20:12:01,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:12:01,549 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2022-12-13 20:12:01,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.7564102564102564) internal successors, (215), 78 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:12:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2022-12-13 20:12:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-13 20:12:01,550 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:12:01,550 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:12:01,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 20:12:01,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 20:12:01,751 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:12:01,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:12:01,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1161001258, now seen corresponding path program 8 times [2022-12-13 20:12:01,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:12:01,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738327529] [2022-12-13 20:12:01,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:12:01,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:12:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:12:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 148 proven. 128 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-12-13 20:12:02,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:12:02,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738327529] [2022-12-13 20:12:02,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738327529] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:12:02,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417971162] [2022-12-13 20:12:02,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:12:02,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:12:02,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:12:02,086 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:12:02,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 20:12:02,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:12:02,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:12:02,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 20:12:02,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:12:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 176 proven. 100 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-12-13 20:12:02,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:12:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 176 proven. 100 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-12-13 20:12:02,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417971162] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:12:02,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:12:02,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2022-12-13 20:12:02,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80201272] [2022-12-13 20:12:02,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:12:02,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 20:12:02,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:12:02,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 20:12:02,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 20:12:02,596 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 38 states, 38 states have (on average 2.8157894736842106) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:12:02,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:12:02,889 INFO L93 Difference]: Finished difference Result 258 states and 291 transitions. [2022-12-13 20:12:02,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 20:12:02,890 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.8157894736842106) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-12-13 20:12:02,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:12:02,890 INFO L225 Difference]: With dead ends: 258 [2022-12-13 20:12:02,890 INFO L226 Difference]: Without dead ends: 169 [2022-12-13 20:12:02,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 167 SyntacticMatches, 22 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 20:12:02,891 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 236 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:12:02,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 90 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:12:02,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-12-13 20:12:02,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 115. [2022-12-13 20:12:02,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1491228070175439) internal successors, (131), 114 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:12:02,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 131 transitions. [2022-12-13 20:12:02,931 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 131 transitions. Word has length 101 [2022-12-13 20:12:02,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:12:02,931 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 131 transitions. [2022-12-13 20:12:02,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.8157894736842106) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:12:02,931 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 131 transitions. [2022-12-13 20:12:02,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-13 20:12:02,932 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:12:02,932 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:12:02,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 20:12:03,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 20:12:03,133 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:12:03,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:12:03,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1474310764, now seen corresponding path program 9 times [2022-12-13 20:12:03,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:12:03,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294390798] [2022-12-13 20:12:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:12:03,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:12:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:12:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:12:04,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:12:04,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294390798] [2022-12-13 20:12:04,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294390798] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:12:04,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727202319] [2022-12-13 20:12:04,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:12:04,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:12:04,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:12:04,262 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:12:04,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 20:12:04,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-13 20:12:04,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:12:05,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-13 20:12:05,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:12:05,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 20:12:05,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:12:05,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2022-12-13 20:12:06,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:12:06,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:12:06,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-12-13 20:12:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 48 proven. 285 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-12-13 20:12:06,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:12:07,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-13 20:12:07,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-13 20:12:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 333 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-12-13 20:12:08,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727202319] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:12:08,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:12:08,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 33, 33] total 90 [2022-12-13 20:12:08,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052478846] [2022-12-13 20:12:08,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:12:08,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-12-13 20:12:08,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:12:08,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-12-13 20:12:08,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=698, Invalid=7312, Unknown=0, NotChecked=0, Total=8010 [2022-12-13 20:12:08,083 INFO L87 Difference]: Start difference. First operand 115 states and 131 transitions. Second operand has 90 states, 90 states have (on average 2.533333333333333) internal successors, (228), 90 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:12:47,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:12:47,128 INFO L93 Difference]: Finished difference Result 661 states and 724 transitions. [2022-12-13 20:12:47,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 285 states. [2022-12-13 20:12:47,128 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.533333333333333) internal successors, (228), 90 states have internal predecessors, (228), 0 states have call successors, (0), 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 [2022-12-13 20:12:47,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:12:47,129 INFO L225 Difference]: With dead ends: 661 [2022-12-13 20:12:47,129 INFO L226 Difference]: Without dead ends: 659 [2022-12-13 20:12:47,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43560 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=7862, Invalid=114975, Unknown=13, NotChecked=0, Total=122850 [2022-12-13 20:12:47,134 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 1551 mSDsluCounter, 2049 mSDsCounter, 0 mSdLazyCounter, 7525 mSolverCounterSat, 472 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1551 SdHoareTripleChecker+Valid, 2106 SdHoareTripleChecker+Invalid, 8014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 7525 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:12:47,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1551 Valid, 2106 Invalid, 8014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 7525 Invalid, 17 Unknown, 0 Unchecked, 16.0s Time] [2022-12-13 20:12:47,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-12-13 20:12:47,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 155. [2022-12-13 20:12:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.2012987012987013) internal successors, (185), 154 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) [2022-12-13 20:12:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 185 transitions. [2022-12-13 20:12:47,188 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 185 transitions. Word has length 103 [2022-12-13 20:12:47,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:12:47,189 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 185 transitions. [2022-12-13 20:12:47,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.533333333333333) internal successors, (228), 90 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:12:47,189 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 185 transitions. [2022-12-13 20:12:47,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-12-13 20:12:47,189 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:12:47,189 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:12:47,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 20:12:47,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 20:12:47,391 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:12:47,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:12:47,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1409534820, now seen corresponding path program 16 times [2022-12-13 20:12:47,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:12:47,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354410905] [2022-12-13 20:12:47,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:12:47,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:12:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:12:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:12:49,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:12:49,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354410905] [2022-12-13 20:12:49,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354410905] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:12:49,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969652044] [2022-12-13 20:12:49,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:12:49,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:12:49,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:12:49,160 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:12:49,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 20:12:49,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:12:49,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:12:49,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-13 20:12:49,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:12:49,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-12-13 20:12:49,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-12-13 20:12:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-13 20:12:49,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:12:50,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-13 20:12:50,297 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 20:12:50,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 28 [2022-12-13 20:12:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-13 20:12:50,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969652044] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:12:50,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:12:50,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 27, 27] total 67 [2022-12-13 20:12:50,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065103568] [2022-12-13 20:12:50,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:12:50,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-13 20:12:50,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:12:50,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-13 20:12:50,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=4103, Unknown=0, NotChecked=0, Total=4422 [2022-12-13 20:12:50,346 INFO L87 Difference]: Start difference. First operand 155 states and 185 transitions. Second operand has 67 states, 67 states have (on average 3.4477611940298507) internal successors, (231), 67 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) [2022-12-13 20:12:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:12:55,521 INFO L93 Difference]: Finished difference Result 285 states and 319 transitions. [2022-12-13 20:12:55,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-12-13 20:12:55,522 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.4477611940298507) internal successors, (231), 67 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 107 [2022-12-13 20:12:55,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:12:55,522 INFO L225 Difference]: With dead ends: 285 [2022-12-13 20:12:55,522 INFO L226 Difference]: Without dead ends: 283 [2022-12-13 20:12:55,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 195 SyntacticMatches, 4 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5738 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1920, Invalid=21336, Unknown=0, NotChecked=0, Total=23256 [2022-12-13 20:12:55,524 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 571 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 3762 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 3896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 3762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:12:55,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 912 Invalid, 3896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 3762 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-13 20:12:55,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-12-13 20:12:55,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 197. [2022-12-13 20:12:55,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.163265306122449) internal successors, (228), 196 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:12:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 228 transitions. [2022-12-13 20:12:55,606 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 228 transitions. Word has length 107 [2022-12-13 20:12:55,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:12:55,606 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 228 transitions. [2022-12-13 20:12:55,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.4477611940298507) internal successors, (231), 67 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) [2022-12-13 20:12:55,606 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 228 transitions. [2022-12-13 20:12:55,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-13 20:12:55,607 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:12:55,607 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:12:55,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 20:12:55,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 20:12:55,808 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:12:55,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:12:55,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1137779666, now seen corresponding path program 10 times [2022-12-13 20:12:55,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:12:55,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164287533] [2022-12-13 20:12:55,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:12:55,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:12:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:12:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 1 proven. 515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:12:57,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:12:57,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164287533] [2022-12-13 20:12:57,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164287533] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:12:57,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475831486] [2022-12-13 20:12:57,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:12:57,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:12:57,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:12:57,949 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:12:57,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 20:12:58,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:12:58,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:12:58,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-13 20:12:58,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:12:58,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-12-13 20:12:58,218 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-13 20:12:58,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-12-13 20:12:58,291 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-13 20:12:58,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-12-13 20:12:58,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-12-13 20:12:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 2 proven. 370 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-12-13 20:12:58,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:13:46,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-12-13 20:13:46,534 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 20:13:46,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 204 treesize of output 142 [2022-12-13 20:13:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 354 refuted. 17 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-13 20:13:46,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475831486] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:13:46,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:13:46,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 27, 28] total 71 [2022-12-13 20:13:46,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424774342] [2022-12-13 20:13:46,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:13:46,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-13 20:13:46,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:13:46,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-13 20:13:46,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=4562, Unknown=18, NotChecked=0, Total=4970 [2022-12-13 20:13:46,593 INFO L87 Difference]: Start difference. First operand 197 states and 228 transitions. Second operand has 71 states, 71 states have (on average 3.2816901408450705) internal successors, (233), 71 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) [2022-12-13 20:13:54,926 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse2 (+ c_~N~0 1)) (.cse3 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_796| Int) (v_ArrVal_1574 Int) (v_ArrVal_1575 Int)) (or (< (select (store (store .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1574) (+ (* |v_ULTIMATE.start_main_~i~0#1_796| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1575) .cse1) .cse2) (not (<= .cse3 |v_ULTIMATE.start_main_~i~0#1_796|)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_796| Int)) (or (forall ((v_ArrVal_1575 Int)) (< (select (store .cse0 (+ (* |v_ULTIMATE.start_main_~i~0#1_796| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1575) .cse1) .cse2)) (not (<= .cse3 |v_ULTIMATE.start_main_~i~0#1_796|)))))) is different from false [2022-12-13 20:13:59,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:14:01,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:14:21,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:14:32,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:14:34,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:14:46,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:14:47,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:14:50,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:15:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:42,006 INFO L93 Difference]: Finished difference Result 392 states and 431 transitions. [2022-12-13 20:15:42,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2022-12-13 20:15:42,006 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.2816901408450705) internal successors, (233), 71 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 108 [2022-12-13 20:15:42,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:42,007 INFO L225 Difference]: With dead ends: 392 [2022-12-13 20:15:42,007 INFO L226 Difference]: Without dead ends: 390 [2022-12-13 20:15:42,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 203 SyntacticMatches, 6 SemanticMatches, 222 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16345 ImplicationChecksByTransitivity, 137.2s TimeCoverageRelationStatistics Valid=2885, Invalid=46583, Unknown=42, NotChecked=442, Total=49952 [2022-12-13 20:15:42,011 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 624 mSDsluCounter, 1747 mSDsCounter, 0 mSdLazyCounter, 7776 mSolverCounterSat, 270 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 8070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 7776 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 26.8s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:42,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 1802 Invalid, 8070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 7776 Invalid, 21 Unknown, 3 Unchecked, 26.8s Time] [2022-12-13 20:15:42,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-12-13 20:15:42,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 115. [2022-12-13 20:15:42,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.131578947368421) internal successors, (129), 114 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:15:42,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2022-12-13 20:15:42,058 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 108 [2022-12-13 20:15:42,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:42,058 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2022-12-13 20:15:42,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.2816901408450705) internal successors, (233), 71 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) [2022-12-13 20:15:42,059 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2022-12-13 20:15:42,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-13 20:15:42,059 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:42,059 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:42,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-13 20:15:42,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 20:15:42,260 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:15:42,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:42,261 INFO L85 PathProgramCache]: Analyzing trace with hash -711625574, now seen corresponding path program 17 times [2022-12-13 20:15:42,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:42,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206097852] [2022-12-13 20:15:42,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:42,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 201 proven. 162 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-12-13 20:15:42,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:42,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206097852] [2022-12-13 20:15:42,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206097852] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:42,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961565705] [2022-12-13 20:15:42,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:15:42,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:42,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:42,673 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:42,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 20:15:43,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-12-13 20:15:43,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:15:43,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 20:15:43,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 242 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-12-13 20:15:43,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 242 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-12-13 20:15:43,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961565705] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:43,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:43,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2022-12-13 20:15:43,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116830159] [2022-12-13 20:15:43,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:43,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 20:15:43,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:43,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 20:15:43,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 20:15:43,890 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:15:44,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:44,341 INFO L93 Difference]: Finished difference Result 272 states and 305 transitions. [2022-12-13 20:15:44,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 20:15:44,341 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 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 111 [2022-12-13 20:15:44,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:44,342 INFO L225 Difference]: With dead ends: 272 [2022-12-13 20:15:44,342 INFO L226 Difference]: Without dead ends: 133 [2022-12-13 20:15:44,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 184 SyntacticMatches, 24 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 20:15:44,343 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 523 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:44,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 183 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:15:44,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-12-13 20:15:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 117. [2022-12-13 20:15:44,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.1293103448275863) internal successors, (131), 116 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:15:44,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2022-12-13 20:15:44,411 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 111 [2022-12-13 20:15:44,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:44,411 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2022-12-13 20:15:44,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:15:44,411 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2022-12-13 20:15:44,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-13 20:15:44,412 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:44,412 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:44,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 20:15:44,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:44,613 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:15:44,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:44,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1109917208, now seen corresponding path program 18 times [2022-12-13 20:15:44,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:44,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465023843] [2022-12-13 20:15:44,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:44,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:15:46,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:46,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465023843] [2022-12-13 20:15:46,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465023843] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:46,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439140290] [2022-12-13 20:15:46,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:15:46,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:46,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:46,086 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:46,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 20:15:47,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-12-13 20:15:47,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:15:47,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 20:15:47,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:47,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-12-13 20:15:49,539 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-13 20:15:49,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-12-13 20:15:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 231 proven. 221 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-12-13 20:15:49,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:50,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 62 [2022-12-13 20:15:50,964 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 20:15:50,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 62 [2022-12-13 20:15:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 220 proven. 232 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-12-13 20:15:51,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439140290] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:51,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:51,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 31, 31] total 90 [2022-12-13 20:15:51,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685765047] [2022-12-13 20:15:51,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:51,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-12-13 20:15:51,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:51,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-12-13 20:15:51,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=7185, Unknown=1, NotChecked=0, Total=8010 [2022-12-13 20:15:51,317 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand has 90 states, 90 states have (on average 2.8333333333333335) internal successors, (255), 90 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:16:00,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:16:16,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:16:16,338 INFO L93 Difference]: Finished difference Result 337 states and 371 transitions. [2022-12-13 20:16:16,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-12-13 20:16:16,338 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.8333333333333335) internal successors, (255), 90 states have internal predecessors, (255), 0 states have call successors, (0), 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 116 [2022-12-13 20:16:16,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:16:16,339 INFO L225 Difference]: With dead ends: 337 [2022-12-13 20:16:16,339 INFO L226 Difference]: Without dead ends: 232 [2022-12-13 20:16:16,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 177 SyntacticMatches, 12 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21735 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=6838, Invalid=67417, Unknown=1, NotChecked=0, Total=74256 [2022-12-13 20:16:16,342 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1595 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 3602 mSolverCounterSat, 457 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1595 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 4070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 3602 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-12-13 20:16:16,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1595 Valid, 975 Invalid, 4070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 3602 Invalid, 11 Unknown, 0 Unchecked, 12.7s Time] [2022-12-13 20:16:16,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-12-13 20:16:16,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 131. [2022-12-13 20:16:16,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.146153846153846) internal successors, (149), 130 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:16:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2022-12-13 20:16:16,408 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 116 [2022-12-13 20:16:16,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:16:16,408 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2022-12-13 20:16:16,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.8333333333333335) internal successors, (255), 90 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:16:16,408 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2022-12-13 20:16:16,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-12-13 20:16:16,408 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:16:16,408 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:16:16,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 20:16:16,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:16:16,609 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:16:16,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:16:16,609 INFO L85 PathProgramCache]: Analyzing trace with hash 5715738, now seen corresponding path program 11 times [2022-12-13 20:16:16,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:16:16,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679336325] [2022-12-13 20:16:16,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:16:16,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:16:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:16:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 213 proven. 178 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-12-13 20:16:16,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:16:16,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679336325] [2022-12-13 20:16:16,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679336325] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:16:16,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743704473] [2022-12-13 20:16:16,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:16:16,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:16:16,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:16:16,962 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:16:16,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 20:16:17,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-12-13 20:16:17,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:16:17,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 20:16:17,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:16:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 247 proven. 144 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-12-13 20:16:17,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:16:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 247 proven. 144 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-12-13 20:16:18,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743704473] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:16:18,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:16:18,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2022-12-13 20:16:18,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431001306] [2022-12-13 20:16:18,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:16:18,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 20:16:18,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:16:18,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 20:16:18,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 20:16:18,116 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 44 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:16:18,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:16:18,595 INFO L93 Difference]: Finished difference Result 298 states and 335 transitions. [2022-12-13 20:16:18,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 20:16:18,595 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 44 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-12-13 20:16:18,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:16:18,596 INFO L225 Difference]: With dead ends: 298 [2022-12-13 20:16:18,596 INFO L226 Difference]: Without dead ends: 195 [2022-12-13 20:16:18,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 197 SyntacticMatches, 26 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=765, Invalid=2427, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 20:16:18,597 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 256 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:16:18,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 107 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:16:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-12-13 20:16:18,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 133. [2022-12-13 20:16:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.143939393939394) internal successors, (151), 132 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:16:18,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 151 transitions. [2022-12-13 20:16:18,657 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 151 transitions. Word has length 119 [2022-12-13 20:16:18,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:16:18,657 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 151 transitions. [2022-12-13 20:16:18,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 44 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:16:18,657 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 151 transitions. [2022-12-13 20:16:18,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-13 20:16:18,657 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:16:18,657 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:16:18,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 20:16:18,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:16:18,859 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:16:18,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:16:18,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1721033692, now seen corresponding path program 12 times [2022-12-13 20:16:18,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:16:18,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243134230] [2022-12-13 20:16:18,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:16:18,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:16:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:16:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:16:20,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:16:20,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243134230] [2022-12-13 20:16:20,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243134230] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:16:20,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062434705] [2022-12-13 20:16:20,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:16:20,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:16:20,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:16:20,280 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:16:20,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 20:16:21,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-12-13 20:16:21,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:16:21,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-13 20:16:21,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:16:22,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 20:16:22,467 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:16:22,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2022-12-13 20:16:24,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:16:24,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:16:24,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-12-13 20:16:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 53 proven. 450 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-12-13 20:16:24,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:16:25,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-13 20:16:25,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-13 20:16:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 471 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-12-13 20:16:25,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062434705] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:16:25,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:16:25,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 38, 37] total 103 [2022-12-13 20:16:25,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578042014] [2022-12-13 20:16:25,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:16:25,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-12-13 20:16:25,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:16:25,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-12-13 20:16:25,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=862, Invalid=9644, Unknown=0, NotChecked=0, Total=10506 [2022-12-13 20:16:25,649 INFO L87 Difference]: Start difference. First operand 133 states and 151 transitions. Second operand has 103 states, 103 states have (on average 2.6116504854368934) internal successors, (269), 103 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:16:29,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:17:08,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:17:08,430 INFO L93 Difference]: Finished difference Result 765 states and 836 transitions. [2022-12-13 20:17:08,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2022-12-13 20:17:08,431 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.6116504854368934) internal successors, (269), 103 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-12-13 20:17:08,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:17:08,432 INFO L225 Difference]: With dead ends: 765 [2022-12-13 20:17:08,432 INFO L226 Difference]: Without dead ends: 763 [2022-12-13 20:17:08,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 182 SyntacticMatches, 7 SemanticMatches, 397 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56758 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=9207, Invalid=149580, Unknown=15, NotChecked=0, Total=158802 [2022-12-13 20:17:08,438 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 1884 mSDsluCounter, 2781 mSDsCounter, 0 mSdLazyCounter, 10368 mSolverCounterSat, 634 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1884 SdHoareTripleChecker+Valid, 2846 SdHoareTripleChecker+Invalid, 11017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 10368 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:17:08,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1884 Valid, 2846 Invalid, 11017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 10368 Invalid, 15 Unknown, 0 Unchecked, 15.1s Time] [2022-12-13 20:17:08,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-12-13 20:17:08,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 179. [2022-12-13 20:17:08,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.196629213483146) internal successors, (213), 178 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:17:08,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 213 transitions. [2022-12-13 20:17:08,522 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 213 transitions. Word has length 121 [2022-12-13 20:17:08,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:17:08,522 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 213 transitions. [2022-12-13 20:17:08,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.6116504854368934) internal successors, (269), 103 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:17:08,522 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 213 transitions. [2022-12-13 20:17:08,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-13 20:17:08,523 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:17:08,523 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:17:08,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 20:17:08,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 20:17:08,724 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:17:08,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:17:08,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1989894868, now seen corresponding path program 19 times [2022-12-13 20:17:08,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:17:08,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357902849] [2022-12-13 20:17:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:17:08,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:17:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:17:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:17:10,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:17:10,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357902849] [2022-12-13 20:17:10,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357902849] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:17:10,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071231323] [2022-12-13 20:17:10,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:17:10,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:17:10,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:17:10,741 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:17:10,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 20:17:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:17:10,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 92 conjunts are in the unsatisfiable core [2022-12-13 20:17:10,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:17:11,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-12-13 20:17:11,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-12-13 20:17:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:17:11,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:17:12,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-13 20:17:12,184 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 20:17:12,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 28 [2022-12-13 20:17:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-12-13 20:17:12,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071231323] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:17:12,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:17:12,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 32, 31] total 79 [2022-12-13 20:17:12,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031503674] [2022-12-13 20:17:12,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:17:12,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-12-13 20:17:12,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:17:12,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-12-13 20:17:12,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=5712, Unknown=0, NotChecked=0, Total=6162 [2022-12-13 20:17:12,648 INFO L87 Difference]: Start difference. First operand 179 states and 213 transitions. Second operand has 79 states, 79 states have (on average 3.3797468354430378) internal successors, (267), 79 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:17:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:17:18,282 INFO L93 Difference]: Finished difference Result 329 states and 367 transitions. [2022-12-13 20:17:18,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-12-13 20:17:18,282 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.3797468354430378) internal successors, (267), 79 states have internal predecessors, (267), 0 states have call successors, (0), 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 [2022-12-13 20:17:18,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:17:18,283 INFO L225 Difference]: With dead ends: 329 [2022-12-13 20:17:18,283 INFO L226 Difference]: Without dead ends: 327 [2022-12-13 20:17:18,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 225 SyntacticMatches, 6 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9058 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2576, Invalid=29286, Unknown=0, NotChecked=0, Total=31862 [2022-12-13 20:17:18,284 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 569 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 5121 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 5286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 5121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:17:18,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 1225 Invalid, 5286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 5121 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-13 20:17:18,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-12-13 20:17:18,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 229. [2022-12-13 20:17:18,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.1578947368421053) internal successors, (264), 228 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:17:18,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 264 transitions. [2022-12-13 20:17:18,413 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 264 transitions. Word has length 125 [2022-12-13 20:17:18,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:17:18,414 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 264 transitions. [2022-12-13 20:17:18,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.3797468354430378) internal successors, (267), 79 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:17:18,414 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 264 transitions. [2022-12-13 20:17:18,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-13 20:17:18,414 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:17:18,414 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:17:18,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 20:17:18,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-13 20:17:18,615 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:17:18,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:17:18,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1458670698, now seen corresponding path program 13 times [2022-12-13 20:17:18,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:17:18,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626647534] [2022-12-13 20:17:18,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:17:18,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:17:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:17:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 1 proven. 724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:17:21,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:17:21,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626647534] [2022-12-13 20:17:21,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626647534] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:17:21,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394665524] [2022-12-13 20:17:21,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:17:21,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:17:21,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:17:21,300 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:17:21,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 20:17:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:17:21,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 92 conjunts are in the unsatisfiable core [2022-12-13 20:17:21,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:17:22,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-12-13 20:17:22,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:17:22,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-12-13 20:17:22,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:17:22,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-12-13 20:17:22,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-13 20:17:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 2 proven. 714 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:17:22,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:18:43,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-12-13 20:18:43,258 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 20:18:43,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 66 [2022-12-13 20:18:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 508 refuted. 20 times theorem prover too weak. 197 trivial. 0 not checked. [2022-12-13 20:18:43,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394665524] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:18:43,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:18:43,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 32, 32] total 96 [2022-12-13 20:18:43,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448499294] [2022-12-13 20:18:43,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:18:43,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-12-13 20:18:43,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:18:43,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-12-13 20:18:43,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=562, Invalid=8530, Unknown=28, NotChecked=0, Total=9120 [2022-12-13 20:18:43,357 INFO L87 Difference]: Start difference. First operand 229 states and 264 transitions. Second operand has 96 states, 96 states have (on average 3.5104166666666665) internal successors, (337), 96 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:19:12,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:19:12,168 INFO L93 Difference]: Finished difference Result 444 states and 485 transitions. [2022-12-13 20:19:12,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2022-12-13 20:19:12,169 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.5104166666666665) internal successors, (337), 96 states have internal predecessors, (337), 0 states have call successors, (0), 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 126 [2022-12-13 20:19:12,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:19:12,170 INFO L225 Difference]: With dead ends: 444 [2022-12-13 20:19:12,170 INFO L226 Difference]: Without dead ends: 442 [2022-12-13 20:19:12,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 226 SyntacticMatches, 4 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23734 ImplicationChecksByTransitivity, 105.7s TimeCoverageRelationStatistics Valid=3987, Invalid=71335, Unknown=28, NotChecked=0, Total=75350 [2022-12-13 20:19:12,173 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 823 mSDsluCounter, 2832 mSDsCounter, 0 mSdLazyCounter, 11718 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 2895 SdHoareTripleChecker+Invalid, 11986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 11718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-13 20:19:12,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 2895 Invalid, 11986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 11718 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-13 20:19:12,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-12-13 20:19:12,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 133. [2022-12-13 20:19:12,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.128787878787879) internal successors, (149), 132 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:19:12,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 149 transitions. [2022-12-13 20:19:12,262 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 149 transitions. Word has length 126 [2022-12-13 20:19:12,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:19:12,262 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 149 transitions. [2022-12-13 20:19:12,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.5104166666666665) internal successors, (337), 96 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:19:12,263 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 149 transitions. [2022-12-13 20:19:12,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-13 20:19:12,263 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:19:12,263 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:19:12,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 20:19:12,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 20:19:12,464 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:19:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:19:12,466 INFO L85 PathProgramCache]: Analyzing trace with hash 716428298, now seen corresponding path program 20 times [2022-12-13 20:19:12,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:19:12,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638978985] [2022-12-13 20:19:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:19:12,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:19:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:19:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 289 proven. 218 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-12-13 20:19:13,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:19:13,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638978985] [2022-12-13 20:19:13,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638978985] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:19:13,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521262955] [2022-12-13 20:19:13,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:19:13,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:19:13,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:19:13,002 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:19:13,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 20:19:13,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:19:13,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:19:13,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 20:19:13,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:19:13,486 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 338 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-12-13 20:19:13,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:19:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 338 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-12-13 20:19:13,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521262955] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:19:13,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:19:13,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2022-12-13 20:19:13,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307498617] [2022-12-13 20:19:13,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:19:13,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 20:19:13,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:19:13,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 20:19:13,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 20:19:13,764 INFO L87 Difference]: Start difference. First operand 133 states and 149 transitions. Second operand has 47 states, 47 states have (on average 3.297872340425532) internal successors, (155), 47 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:19:14,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:19:14,477 INFO L93 Difference]: Finished difference Result 312 states and 349 transitions. [2022-12-13 20:19:14,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 20:19:14,478 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.297872340425532) internal successors, (155), 47 states have internal predecessors, (155), 0 states have call successors, (0), 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 129 [2022-12-13 20:19:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:19:14,479 INFO L225 Difference]: With dead ends: 312 [2022-12-13 20:19:14,479 INFO L226 Difference]: Without dead ends: 151 [2022-12-13 20:19:14,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 214 SyntacticMatches, 28 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 20:19:14,480 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 762 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:19:14,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 238 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 20:19:14,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-12-13 20:19:14,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 135. [2022-12-13 20:19:14,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.126865671641791) internal successors, (151), 134 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:19:14,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 151 transitions. [2022-12-13 20:19:14,623 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 151 transitions. Word has length 129 [2022-12-13 20:19:14,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:19:14,623 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 151 transitions. [2022-12-13 20:19:14,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.297872340425532) internal successors, (155), 47 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:19:14,623 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 151 transitions. [2022-12-13 20:19:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-13 20:19:14,624 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:19:14,624 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:19:14,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-13 20:19:14,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 20:19:14,825 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:19:14,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:19:14,826 INFO L85 PathProgramCache]: Analyzing trace with hash -554152064, now seen corresponding path program 21 times [2022-12-13 20:19:14,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:19:14,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022782770] [2022-12-13 20:19:14,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:19:14,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:19:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:19:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 821 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:19:16,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:19:16,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022782770] [2022-12-13 20:19:16,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022782770] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:19:16,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734614084] [2022-12-13 20:19:16,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:19:16,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:19:16,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:19:16,925 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:19:16,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9932baa0-c109-46ef-9865-a9d84f7513c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 20:19:18,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-13 20:19:18,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:19:18,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 20:19:18,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:19:18,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-12-13 20:19:20,549 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-13 20:19:20,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-12-13 20:19:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-12-13 20:19:20,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:19:22,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 62 [2022-12-13 20:19:22,572 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 20:19:22,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 62 [2022-12-13 20:19:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 312 proven. 313 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-12-13 20:19:22,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734614084] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:19:22,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:19:22,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 35, 35] total 102 [2022-12-13 20:19:22,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427034970] [2022-12-13 20:19:22,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:19:22,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-12-13 20:19:22,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:19:22,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-12-13 20:19:22,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1034, Invalid=9268, Unknown=0, NotChecked=0, Total=10302 [2022-12-13 20:19:22,973 INFO L87 Difference]: Start difference. First operand 135 states and 151 transitions. Second operand has 102 states, 102 states have (on average 2.892156862745098) internal successors, (295), 102 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:19:25,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:19:27,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:19:30,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:19:32,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:19:36,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:19:37,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:19:40,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:19:42,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]