./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label42.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label42.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN --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 43b1e2ddb5478e4d8ee38477d15f5851a49b7cf223d0a089a3fdb9014fd7706f --- 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-6b4ec56 [2022-11-20 12:18:25,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:18:25,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:18:25,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:18:25,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:18:25,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:18:25,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:18:25,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:18:25,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:18:25,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:18:25,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:18:25,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:18:25,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:18:25,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:18:25,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:18:25,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:18:25,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:18:25,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:18:25,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:18:25,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:18:25,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:18:25,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:18:25,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:18:25,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:18:25,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:18:25,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:18:25,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:18:25,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:18:25,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:18:25,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:18:25,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:18:25,891 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:18:25,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:18:25,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:18:25,895 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:18:25,895 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:18:25,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:18:25,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:18:25,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:18:25,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:18:25,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:18:25,907 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:18:25,950 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:18:25,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:18:25,951 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:18:25,951 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:18:25,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:18:25,953 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:18:25,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:18:25,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:18:25,954 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:18:25,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:18:25,955 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:18:25,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:18:25,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:18:25,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:18:25,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:18:25,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:18:25,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:18:25,957 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:18:25,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:18:25,958 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:18:25,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:18:25,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:18:25,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:18:25,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:18:25,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:18:25,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:18:25,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:18:25,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:18:25,961 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:18:25,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:18:25,961 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:18:25,961 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:18:25,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:18:25,962 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43b1e2ddb5478e4d8ee38477d15f5851a49b7cf223d0a089a3fdb9014fd7706f [2022-11-20 12:18:26,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:18:26,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:18:26,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:18:26,340 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:18:26,342 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:18:26,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/eca-rers2012/Problem03_label42.c [2022-11-20 12:18:29,390 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:18:29,947 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:18:29,948 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/sv-benchmarks/c/eca-rers2012/Problem03_label42.c [2022-11-20 12:18:29,971 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/data/7bc9beab7/9ffd50874b104db2ac01a59bc4207a0a/FLAGc68f66e03 [2022-11-20 12:18:29,997 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/data/7bc9beab7/9ffd50874b104db2ac01a59bc4207a0a [2022-11-20 12:18:30,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:18:30,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:18:30,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:18:30,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:18:30,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:18:30,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:18:29" (1/1) ... [2022-11-20 12:18:30,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43edf8a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:30, skipping insertion in model container [2022-11-20 12:18:30,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:18:29" (1/1) ... [2022-11-20 12:18:30,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:18:30,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:18:30,868 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_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/sv-benchmarks/c/eca-rers2012/Problem03_label42.c[60691,60704] [2022-11-20 12:18:30,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:18:30,915 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:18:31,270 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_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/sv-benchmarks/c/eca-rers2012/Problem03_label42.c[60691,60704] [2022-11-20 12:18:31,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:18:31,304 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:18:31,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:31 WrapperNode [2022-11-20 12:18:31,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:18:31,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:18:31,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:18:31,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:18:31,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:31" (1/1) ... [2022-11-20 12:18:31,380 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:31" (1/1) ... [2022-11-20 12:18:31,491 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-20 12:18:31,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:18:31,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:18:31,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:18:31,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:18:31,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:31" (1/1) ... [2022-11-20 12:18:31,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:31" (1/1) ... [2022-11-20 12:18:31,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:31" (1/1) ... [2022-11-20 12:18:31,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:31" (1/1) ... [2022-11-20 12:18:31,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:31" (1/1) ... [2022-11-20 12:18:31,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:31" (1/1) ... [2022-11-20 12:18:31,589 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:31" (1/1) ... [2022-11-20 12:18:31,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:31" (1/1) ... [2022-11-20 12:18:31,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:18:31,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:18:31,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:18:31,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:18:31,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:31" (1/1) ... [2022-11-20 12:18:31,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:18:31,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:18:31,673 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:18:31,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:18:31,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:18:31,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:18:31,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:18:31,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:18:31,830 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:18:31,832 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:18:34,141 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:18:34,166 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:18:34,167 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 12:18:34,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:18:34 BoogieIcfgContainer [2022-11-20 12:18:34,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:18:34,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:18:34,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:18:34,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:18:34,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:18:29" (1/3) ... [2022-11-20 12:18:34,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@681d0f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:18:34, skipping insertion in model container [2022-11-20 12:18:34,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:31" (2/3) ... [2022-11-20 12:18:34,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@681d0f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:18:34, skipping insertion in model container [2022-11-20 12:18:34,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:18:34" (3/3) ... [2022-11-20 12:18:34,191 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label42.c [2022-11-20 12:18:34,216 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:18:34,217 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:18:34,310 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:18:34,317 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;@44b470cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:18:34,317 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 12:18:34,324 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:34,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-20 12:18:34,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:18:34,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:18:34,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:18:34,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:18:34,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1065786898, now seen corresponding path program 1 times [2022-11-20 12:18:34,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:18:34,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352967311] [2022-11-20 12:18:34,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:34,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:18:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:18:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:18:35,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:18:35,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352967311] [2022-11-20 12:18:35,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352967311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:18:35,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:18:35,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:18:35,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115263989] [2022-11-20 12:18:35,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:18:35,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:18:35,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:18:35,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:18:35,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:18:35,817 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:37,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:18:37,378 INFO L93 Difference]: Finished difference Result 833 states and 1474 transitions. [2022-11-20 12:18:37,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:18:37,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 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 196 [2022-11-20 12:18:37,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:18:37,396 INFO L225 Difference]: With dead ends: 833 [2022-11-20 12:18:37,396 INFO L226 Difference]: Without dead ends: 454 [2022-11-20 12:18:37,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:18:37,404 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 95 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:18:37,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 163 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 12:18:37,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-11-20 12:18:37,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 450. [2022-11-20 12:18:37,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.55902004454343) internal successors, (700), 449 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:37,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 700 transitions. [2022-11-20 12:18:37,488 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 700 transitions. Word has length 196 [2022-11-20 12:18:37,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:18:37,490 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 700 transitions. [2022-11-20 12:18:37,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 700 transitions. [2022-11-20 12:18:37,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-20 12:18:37,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:18:37,501 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:18:37,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:18:37,502 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:18:37,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:18:37,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1852788322, now seen corresponding path program 1 times [2022-11-20 12:18:37,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:18:37,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93363226] [2022-11-20 12:18:37,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:37,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:18:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:18:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:18:38,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:18:38,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93363226] [2022-11-20 12:18:38,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93363226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:18:38,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:18:38,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:18:38,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668801882] [2022-11-20 12:18:38,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:18:38,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:18:38,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:18:38,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:18:38,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:18:38,048 INFO L87 Difference]: Start difference. First operand 450 states and 700 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:39,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:18:39,089 INFO L93 Difference]: Finished difference Result 1337 states and 2085 transitions. [2022-11-20 12:18:39,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:18:39,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 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 202 [2022-11-20 12:18:39,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:18:39,096 INFO L225 Difference]: With dead ends: 1337 [2022-11-20 12:18:39,097 INFO L226 Difference]: Without dead ends: 889 [2022-11-20 12:18:39,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:18:39,100 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:18:39,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 104 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:18:39,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-11-20 12:18:39,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 885. [2022-11-20 12:18:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 1.5429864253393666) internal successors, (1364), 884 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:39,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1364 transitions. [2022-11-20 12:18:39,186 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1364 transitions. Word has length 202 [2022-11-20 12:18:39,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:18:39,189 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 1364 transitions. [2022-11-20 12:18:39,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:39,190 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1364 transitions. [2022-11-20 12:18:39,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-20 12:18:39,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:18:39,205 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:18:39,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:18:39,209 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:18:39,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:18:39,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1185748617, now seen corresponding path program 1 times [2022-11-20 12:18:39,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:18:39,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918227774] [2022-11-20 12:18:39,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:39,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:18:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:18:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:18:39,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:18:39,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918227774] [2022-11-20 12:18:39,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918227774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:18:39,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:18:39,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:18:39,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219992748] [2022-11-20 12:18:39,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:18:39,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:18:39,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:18:39,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:18:39,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:18:39,531 INFO L87 Difference]: Start difference. First operand 885 states and 1364 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:18:40,690 INFO L93 Difference]: Finished difference Result 2599 states and 4012 transitions. [2022-11-20 12:18:40,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:18:40,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 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 209 [2022-11-20 12:18:40,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:18:40,697 INFO L225 Difference]: With dead ends: 2599 [2022-11-20 12:18:40,698 INFO L226 Difference]: Without dead ends: 1716 [2022-11-20 12:18:40,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:18:40,703 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 256 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:18:40,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 136 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 12:18:40,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-11-20 12:18:40,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1714. [2022-11-20 12:18:40,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 1.4676007005253942) internal successors, (2514), 1713 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2514 transitions. [2022-11-20 12:18:40,754 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2514 transitions. Word has length 209 [2022-11-20 12:18:40,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:18:40,754 INFO L495 AbstractCegarLoop]: Abstraction has 1714 states and 2514 transitions. [2022-11-20 12:18:40,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:40,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2514 transitions. [2022-11-20 12:18:40,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-20 12:18:40,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:18:40,761 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:18:40,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:18:40,761 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:18:40,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:18:40,762 INFO L85 PathProgramCache]: Analyzing trace with hash -515189889, now seen corresponding path program 1 times [2022-11-20 12:18:40,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:18:40,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965201058] [2022-11-20 12:18:40,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:40,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:18:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:18:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 12:18:41,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:18:41,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965201058] [2022-11-20 12:18:41,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965201058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:18:41,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:18:41,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:18:41,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415598804] [2022-11-20 12:18:41,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:18:41,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:18:41,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:18:41,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:18:41,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:18:41,014 INFO L87 Difference]: Start difference. First operand 1714 states and 2514 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:42,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:18:42,233 INFO L93 Difference]: Finished difference Result 5090 states and 7487 transitions. [2022-11-20 12:18:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:18:42,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2022-11-20 12:18:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:18:42,247 INFO L225 Difference]: With dead ends: 5090 [2022-11-20 12:18:42,248 INFO L226 Difference]: Without dead ends: 3378 [2022-11-20 12:18:42,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:18:42,263 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:18:42,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 119 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 12:18:42,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3378 states. [2022-11-20 12:18:42,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3378 to 3345. [2022-11-20 12:18:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3345 states, 3344 states have (on average 1.4342105263157894) internal successors, (4796), 3344 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:42,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3345 states to 3345 states and 4796 transitions. [2022-11-20 12:18:42,353 INFO L78 Accepts]: Start accepts. Automaton has 3345 states and 4796 transitions. Word has length 210 [2022-11-20 12:18:42,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:18:42,353 INFO L495 AbstractCegarLoop]: Abstraction has 3345 states and 4796 transitions. [2022-11-20 12:18:42,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:42,354 INFO L276 IsEmpty]: Start isEmpty. Operand 3345 states and 4796 transitions. [2022-11-20 12:18:42,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-11-20 12:18:42,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:18:42,364 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:18:42,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 12:18:42,364 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:18:42,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:18:42,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1167965794, now seen corresponding path program 1 times [2022-11-20 12:18:42,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:18:42,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119054158] [2022-11-20 12:18:42,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:42,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:18:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:18:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 12:18:42,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:18:42,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119054158] [2022-11-20 12:18:42,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119054158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:18:42,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:18:42,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:18:42,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455079342] [2022-11-20 12:18:42,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:18:42,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:18:42,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:18:42,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:18:42,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:18:42,727 INFO L87 Difference]: Start difference. First operand 3345 states and 4796 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:43,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:18:43,869 INFO L93 Difference]: Finished difference Result 9144 states and 13135 transitions. [2022-11-20 12:18:43,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:18:43,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2022-11-20 12:18:43,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:18:43,891 INFO L225 Difference]: With dead ends: 9144 [2022-11-20 12:18:43,892 INFO L226 Difference]: Without dead ends: 5801 [2022-11-20 12:18:43,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:18:43,903 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 243 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:18:43,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 166 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:18:43,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5801 states. [2022-11-20 12:18:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5801 to 5795. [2022-11-20 12:18:44,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5795 states, 5794 states have (on average 1.387124611667242) internal successors, (8037), 5794 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 8037 transitions. [2022-11-20 12:18:44,060 INFO L78 Accepts]: Start accepts. Automaton has 5795 states and 8037 transitions. Word has length 223 [2022-11-20 12:18:44,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:18:44,063 INFO L495 AbstractCegarLoop]: Abstraction has 5795 states and 8037 transitions. [2022-11-20 12:18:44,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:44,068 INFO L276 IsEmpty]: Start isEmpty. Operand 5795 states and 8037 transitions. [2022-11-20 12:18:44,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-11-20 12:18:44,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:18:44,084 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:18:44,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:18:44,085 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:18:44,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:18:44,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1965311044, now seen corresponding path program 1 times [2022-11-20 12:18:44,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:18:44,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661857634] [2022-11-20 12:18:44,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:44,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:18:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:18:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:18:44,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:18:44,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661857634] [2022-11-20 12:18:44,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661857634] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:18:44,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:18:44,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:18:44,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085835639] [2022-11-20 12:18:44,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:18:44,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:18:44,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:18:44,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:18:44,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:18:44,767 INFO L87 Difference]: Start difference. First operand 5795 states and 8037 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:46,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:18:46,034 INFO L93 Difference]: Finished difference Result 14453 states and 19967 transitions. [2022-11-20 12:18:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:18:46,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 224 [2022-11-20 12:18:46,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:18:46,066 INFO L225 Difference]: With dead ends: 14453 [2022-11-20 12:18:46,066 INFO L226 Difference]: Without dead ends: 8660 [2022-11-20 12:18:46,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:18:46,076 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:18:46,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 385 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 12:18:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8660 states. [2022-11-20 12:18:46,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8660 to 8637. [2022-11-20 12:18:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8637 states, 8636 states have (on average 1.3243399722093563) internal successors, (11437), 8636 states have internal predecessors, (11437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8637 states to 8637 states and 11437 transitions. [2022-11-20 12:18:46,387 INFO L78 Accepts]: Start accepts. Automaton has 8637 states and 11437 transitions. Word has length 224 [2022-11-20 12:18:46,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:18:46,391 INFO L495 AbstractCegarLoop]: Abstraction has 8637 states and 11437 transitions. [2022-11-20 12:18:46,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:46,391 INFO L276 IsEmpty]: Start isEmpty. Operand 8637 states and 11437 transitions. [2022-11-20 12:18:46,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-11-20 12:18:46,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:18:46,409 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:18:46,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 12:18:46,410 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:18:46,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:18:46,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1623070180, now seen corresponding path program 1 times [2022-11-20 12:18:46,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:18:46,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266028240] [2022-11-20 12:18:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:46,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:18:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:18:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 12:18:46,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:18:46,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266028240] [2022-11-20 12:18:46,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266028240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:18:46,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:18:46,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:18:46,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373762806] [2022-11-20 12:18:46,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:18:46,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:18:46,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:18:46,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:18:46,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:18:46,837 INFO L87 Difference]: Start difference. First operand 8637 states and 11437 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:48,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:18:48,153 INFO L93 Difference]: Finished difference Result 23583 states and 31178 transitions. [2022-11-20 12:18:48,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:18:48,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 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 237 [2022-11-20 12:18:48,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:18:48,216 INFO L225 Difference]: With dead ends: 23583 [2022-11-20 12:18:48,217 INFO L226 Difference]: Without dead ends: 14948 [2022-11-20 12:18:48,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:18:48,230 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 216 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:18:48,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 407 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 12:18:48,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14948 states. [2022-11-20 12:18:48,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14948 to 14535. [2022-11-20 12:18:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14535 states, 14534 states have (on average 1.2664097977157012) internal successors, (18406), 14534 states have internal predecessors, (18406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14535 states to 14535 states and 18406 transitions. [2022-11-20 12:18:48,729 INFO L78 Accepts]: Start accepts. Automaton has 14535 states and 18406 transitions. Word has length 237 [2022-11-20 12:18:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:18:48,729 INFO L495 AbstractCegarLoop]: Abstraction has 14535 states and 18406 transitions. [2022-11-20 12:18:48,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:48,731 INFO L276 IsEmpty]: Start isEmpty. Operand 14535 states and 18406 transitions. [2022-11-20 12:18:48,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-11-20 12:18:48,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:18:48,754 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:18:48,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 12:18:48,754 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:18:48,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:18:48,755 INFO L85 PathProgramCache]: Analyzing trace with hash 452388191, now seen corresponding path program 1 times [2022-11-20 12:18:48,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:18:48,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772932151] [2022-11-20 12:18:48,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:48,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:18:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:18:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:18:49,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:18:49,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772932151] [2022-11-20 12:18:49,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772932151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:18:49,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:18:49,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:18:49,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441924607] [2022-11-20 12:18:49,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:18:49,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:18:49,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:18:49,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:18:49,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:18:49,384 INFO L87 Difference]: Start difference. First operand 14535 states and 18406 transitions. Second operand has 4 states, 4 states have (on average 60.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:18:51,269 INFO L93 Difference]: Finished difference Result 28298 states and 35915 transitions. [2022-11-20 12:18:51,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:18:51,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 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 240 [2022-11-20 12:18:51,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:18:51,384 INFO L225 Difference]: With dead ends: 28298 [2022-11-20 12:18:51,384 INFO L226 Difference]: Without dead ends: 14577 [2022-11-20 12:18:51,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:18:51,397 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 410 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:18:51,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 163 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 12:18:51,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14577 states. [2022-11-20 12:18:51,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14577 to 13926. [2022-11-20 12:18:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13926 states, 13925 states have (on average 1.2690843806104128) internal successors, (17672), 13925 states have internal predecessors, (17672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:51,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13926 states to 13926 states and 17672 transitions. [2022-11-20 12:18:51,662 INFO L78 Accepts]: Start accepts. Automaton has 13926 states and 17672 transitions. Word has length 240 [2022-11-20 12:18:51,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:18:51,663 INFO L495 AbstractCegarLoop]: Abstraction has 13926 states and 17672 transitions. [2022-11-20 12:18:51,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:51,664 INFO L276 IsEmpty]: Start isEmpty. Operand 13926 states and 17672 transitions. [2022-11-20 12:18:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-11-20 12:18:51,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:18:51,687 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:18:51,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 12:18:51,688 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:18:51,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:18:51,689 INFO L85 PathProgramCache]: Analyzing trace with hash -7650806, now seen corresponding path program 1 times [2022-11-20 12:18:51,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:18:51,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112481004] [2022-11-20 12:18:51,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:51,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:18:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:18:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 12:18:52,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:18:52,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112481004] [2022-11-20 12:18:52,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112481004] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:18:52,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061258605] [2022-11-20 12:18:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:52,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:18:52,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:18:52,267 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:18:52,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:18:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:18:52,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:18:52,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:18:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 12:18:53,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:18:53,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061258605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:18:53,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:18:53,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 12:18:53,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734245921] [2022-11-20 12:18:53,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:18:53,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:18:53,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:18:53,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:18:53,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:18:53,100 INFO L87 Difference]: Start difference. First operand 13926 states and 17672 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:54,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:18:54,589 INFO L93 Difference]: Finished difference Result 37395 states and 47512 transitions. [2022-11-20 12:18:54,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:18:54,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 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 247 [2022-11-20 12:18:54,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:18:54,647 INFO L225 Difference]: With dead ends: 37395 [2022-11-20 12:18:54,648 INFO L226 Difference]: Without dead ends: 23471 [2022-11-20 12:18:54,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:18:54,729 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 39 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:18:54,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 417 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 12:18:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23471 states. [2022-11-20 12:18:55,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23471 to 21843. [2022-11-20 12:18:55,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21843 states, 21842 states have (on average 1.1970057687024998) internal successors, (26145), 21842 states have internal predecessors, (26145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:55,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21843 states to 21843 states and 26145 transitions. [2022-11-20 12:18:55,172 INFO L78 Accepts]: Start accepts. Automaton has 21843 states and 26145 transitions. Word has length 247 [2022-11-20 12:18:55,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:18:55,173 INFO L495 AbstractCegarLoop]: Abstraction has 21843 states and 26145 transitions. [2022-11-20 12:18:55,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:55,173 INFO L276 IsEmpty]: Start isEmpty. Operand 21843 states and 26145 transitions. [2022-11-20 12:18:55,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-11-20 12:18:55,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:18:55,209 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:18:55,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:18:55,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 12:18:55,418 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:18:55,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:18:55,418 INFO L85 PathProgramCache]: Analyzing trace with hash 760934303, now seen corresponding path program 1 times [2022-11-20 12:18:55,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:18:55,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974389412] [2022-11-20 12:18:55,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:55,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:18:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:18:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 12:18:56,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:18:56,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974389412] [2022-11-20 12:18:56,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974389412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:18:56,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:18:56,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:18:56,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310983624] [2022-11-20 12:18:56,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:18:56,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:18:56,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:18:56,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:18:56,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:18:56,075 INFO L87 Difference]: Start difference. First operand 21843 states and 26145 transitions. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 2 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:57,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:18:57,498 INFO L93 Difference]: Finished difference Result 46954 states and 56019 transitions. [2022-11-20 12:18:57,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:18:57,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 2 states have internal predecessors, (238), 0 states have call successors, (0), 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 250 [2022-11-20 12:18:57,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:18:57,564 INFO L225 Difference]: With dead ends: 46954 [2022-11-20 12:18:57,564 INFO L226 Difference]: Without dead ends: 26331 [2022-11-20 12:18:57,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:18:57,601 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 186 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:18:57,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 181 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 12:18:57,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26331 states. [2022-11-20 12:18:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26331 to 25916. [2022-11-20 12:18:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25916 states, 25915 states have (on average 1.1864171329345938) internal successors, (30746), 25915 states have internal predecessors, (30746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:58,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25916 states to 25916 states and 30746 transitions. [2022-11-20 12:18:58,112 INFO L78 Accepts]: Start accepts. Automaton has 25916 states and 30746 transitions. Word has length 250 [2022-11-20 12:18:58,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:18:58,113 INFO L495 AbstractCegarLoop]: Abstraction has 25916 states and 30746 transitions. [2022-11-20 12:18:58,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 2 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:58,114 INFO L276 IsEmpty]: Start isEmpty. Operand 25916 states and 30746 transitions. [2022-11-20 12:18:58,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-11-20 12:18:58,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:18:58,155 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:18:58,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 12:18:58,155 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:18:58,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:18:58,156 INFO L85 PathProgramCache]: Analyzing trace with hash 233812618, now seen corresponding path program 1 times [2022-11-20 12:18:58,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:18:58,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427695878] [2022-11-20 12:18:58,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:58,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:18:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:18:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:18:58,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:18:58,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427695878] [2022-11-20 12:18:58,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427695878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:18:58,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:18:58,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:18:58,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149051825] [2022-11-20 12:18:58,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:18:58,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:18:58,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:18:58,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:18:58,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:18:58,506 INFO L87 Difference]: Start difference. First operand 25916 states and 30746 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:59,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:18:59,273 INFO L93 Difference]: Finished difference Result 47906 states and 56582 transitions. [2022-11-20 12:18:59,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:18:59,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 257 [2022-11-20 12:18:59,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:18:59,322 INFO L225 Difference]: With dead ends: 47906 [2022-11-20 12:18:59,323 INFO L226 Difference]: Without dead ends: 23616 [2022-11-20 12:18:59,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:18:59,338 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:18:59,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 12:18:59,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23616 states. [2022-11-20 12:18:59,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23616 to 23616. [2022-11-20 12:18:59,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23616 states, 23615 states have (on average 1.1614651704425154) internal successors, (27428), 23615 states have internal predecessors, (27428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:59,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23616 states to 23616 states and 27428 transitions. [2022-11-20 12:18:59,779 INFO L78 Accepts]: Start accepts. Automaton has 23616 states and 27428 transitions. Word has length 257 [2022-11-20 12:18:59,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:18:59,780 INFO L495 AbstractCegarLoop]: Abstraction has 23616 states and 27428 transitions. [2022-11-20 12:18:59,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:59,780 INFO L276 IsEmpty]: Start isEmpty. Operand 23616 states and 27428 transitions. [2022-11-20 12:18:59,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-11-20 12:18:59,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:18:59,812 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:18:59,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 12:18:59,812 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:18:59,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:18:59,813 INFO L85 PathProgramCache]: Analyzing trace with hash 638284128, now seen corresponding path program 1 times [2022-11-20 12:18:59,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:18:59,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630169718] [2022-11-20 12:18:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:59,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:18:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:19:00,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:19:00,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630169718] [2022-11-20 12:19:00,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630169718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:19:00,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:19:00,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:19:00,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988412988] [2022-11-20 12:19:00,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:19:00,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:19:00,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:19:00,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:19:00,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:19:00,472 INFO L87 Difference]: Start difference. First operand 23616 states and 27428 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 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) [2022-11-20 12:19:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:19:01,860 INFO L93 Difference]: Finished difference Result 55171 states and 63944 transitions. [2022-11-20 12:19:01,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:19:01,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 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 285 [2022-11-20 12:19:01,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:19:01,946 INFO L225 Difference]: With dead ends: 55171 [2022-11-20 12:19:01,946 INFO L226 Difference]: Without dead ends: 33181 [2022-11-20 12:19:01,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:19:01,968 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 217 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:19:01,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 119 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:19:02,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33181 states. [2022-11-20 12:19:02,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33181 to 33177. [2022-11-20 12:19:02,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33177 states, 33176 states have (on average 1.1559561128526645) internal successors, (38350), 33176 states have internal predecessors, (38350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:02,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33177 states to 33177 states and 38350 transitions. [2022-11-20 12:19:02,743 INFO L78 Accepts]: Start accepts. Automaton has 33177 states and 38350 transitions. Word has length 285 [2022-11-20 12:19:02,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:19:02,743 INFO L495 AbstractCegarLoop]: Abstraction has 33177 states and 38350 transitions. [2022-11-20 12:19:02,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 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) [2022-11-20 12:19:02,744 INFO L276 IsEmpty]: Start isEmpty. Operand 33177 states and 38350 transitions. [2022-11-20 12:19:02,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-20 12:19:02,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:19:02,801 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:19:02,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 12:19:02,801 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:19:02,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:19:02,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1028161034, now seen corresponding path program 1 times [2022-11-20 12:19:02,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:19:02,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865042786] [2022-11-20 12:19:02,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:02,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:19:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:19:03,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:19:03,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865042786] [2022-11-20 12:19:03,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865042786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:19:03,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:19:03,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:19:03,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161417420] [2022-11-20 12:19:03,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:19:03,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:19:03,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:19:03,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:19:03,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:19:03,248 INFO L87 Difference]: Start difference. First operand 33177 states and 38350 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:04,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:19:04,617 INFO L93 Difference]: Finished difference Result 69797 states and 81566 transitions. [2022-11-20 12:19:04,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:19:04,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 286 [2022-11-20 12:19:04,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:19:04,685 INFO L225 Difference]: With dead ends: 69797 [2022-11-20 12:19:04,686 INFO L226 Difference]: Without dead ends: 36825 [2022-11-20 12:19:04,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:19:04,708 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 127 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:19:04,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 149 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:19:04,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36825 states. [2022-11-20 12:19:05,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36825 to 32968. [2022-11-20 12:19:05,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32968 states, 32967 states have (on average 1.1297964631297965) internal successors, (37246), 32967 states have internal predecessors, (37246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:05,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32968 states to 32968 states and 37246 transitions. [2022-11-20 12:19:05,421 INFO L78 Accepts]: Start accepts. Automaton has 32968 states and 37246 transitions. Word has length 286 [2022-11-20 12:19:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:19:05,422 INFO L495 AbstractCegarLoop]: Abstraction has 32968 states and 37246 transitions. [2022-11-20 12:19:05,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:05,423 INFO L276 IsEmpty]: Start isEmpty. Operand 32968 states and 37246 transitions. [2022-11-20 12:19:05,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-11-20 12:19:05,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:19:05,466 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:19:05,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 12:19:05,467 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:19:05,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:19:05,468 INFO L85 PathProgramCache]: Analyzing trace with hash 664285702, now seen corresponding path program 1 times [2022-11-20 12:19:05,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:19:05,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556001098] [2022-11-20 12:19:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:05,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:19:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-20 12:19:05,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:19:05,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556001098] [2022-11-20 12:19:05,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556001098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:19:05,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:19:05,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:19:05,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414463833] [2022-11-20 12:19:05,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:19:05,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:19:05,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:19:05,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:19:05,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:19:05,988 INFO L87 Difference]: Start difference. First operand 32968 states and 37246 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:07,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:19:07,288 INFO L93 Difference]: Finished difference Result 64723 states and 73505 transitions. [2022-11-20 12:19:07,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:19:07,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 332 [2022-11-20 12:19:07,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:19:07,363 INFO L225 Difference]: With dead ends: 64723 [2022-11-20 12:19:07,363 INFO L226 Difference]: Without dead ends: 39284 [2022-11-20 12:19:07,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:19:07,383 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 158 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:19:07,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 148 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:19:07,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39284 states. [2022-11-20 12:19:08,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39284 to 37850. [2022-11-20 12:19:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37850 states, 37849 states have (on average 1.1412718962191868) internal successors, (43196), 37849 states have internal predecessors, (43196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37850 states to 37850 states and 43196 transitions. [2022-11-20 12:19:08,124 INFO L78 Accepts]: Start accepts. Automaton has 37850 states and 43196 transitions. Word has length 332 [2022-11-20 12:19:08,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:19:08,125 INFO L495 AbstractCegarLoop]: Abstraction has 37850 states and 43196 transitions. [2022-11-20 12:19:08,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:08,125 INFO L276 IsEmpty]: Start isEmpty. Operand 37850 states and 43196 transitions. [2022-11-20 12:19:08,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2022-11-20 12:19:08,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:19:08,169 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:19:08,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 12:19:08,169 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:19:08,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:19:08,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1040535542, now seen corresponding path program 1 times [2022-11-20 12:19:08,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:19:08,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892095586] [2022-11-20 12:19:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:08,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:19:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:19:08,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:19:08,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892095586] [2022-11-20 12:19:08,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892095586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:19:08,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:19:08,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:19:08,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434014530] [2022-11-20 12:19:08,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:19:08,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:19:08,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:19:08,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:19:08,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:19:08,729 INFO L87 Difference]: Start difference. First operand 37850 states and 43196 transitions. Second operand has 4 states, 4 states have (on average 74.75) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:10,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:19:10,727 INFO L93 Difference]: Finished difference Result 71439 states and 81588 transitions. [2022-11-20 12:19:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:19:10,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.75) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 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 353 [2022-11-20 12:19:10,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:19:10,785 INFO L225 Difference]: With dead ends: 71439 [2022-11-20 12:19:10,785 INFO L226 Difference]: Without dead ends: 41933 [2022-11-20 12:19:10,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:19:10,806 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 335 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:19:10,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 107 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 12:19:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41933 states. [2022-11-20 12:19:11,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41933 to 38463. [2022-11-20 12:19:11,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38463 states, 38462 states have (on average 1.1416722999324007) internal successors, (43911), 38462 states have internal predecessors, (43911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38463 states to 38463 states and 43911 transitions. [2022-11-20 12:19:11,471 INFO L78 Accepts]: Start accepts. Automaton has 38463 states and 43911 transitions. Word has length 353 [2022-11-20 12:19:11,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:19:11,471 INFO L495 AbstractCegarLoop]: Abstraction has 38463 states and 43911 transitions. [2022-11-20 12:19:11,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.75) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:11,472 INFO L276 IsEmpty]: Start isEmpty. Operand 38463 states and 43911 transitions. [2022-11-20 12:19:11,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2022-11-20 12:19:11,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:19:11,509 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:19:11,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 12:19:11,509 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:19:11,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:19:11,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1499436243, now seen corresponding path program 1 times [2022-11-20 12:19:11,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:19:11,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585369415] [2022-11-20 12:19:11,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:11,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:19:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-20 12:19:12,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:19:12,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585369415] [2022-11-20 12:19:12,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585369415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:19:12,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:19:12,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:19:12,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812779158] [2022-11-20 12:19:12,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:19:12,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:19:12,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:19:12,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:19:12,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:19:12,302 INFO L87 Difference]: Start difference. First operand 38463 states and 43911 transitions. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:13,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:19:13,720 INFO L93 Difference]: Finished difference Result 71234 states and 81180 transitions. [2022-11-20 12:19:13,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:19:13,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 360 [2022-11-20 12:19:13,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:19:13,765 INFO L225 Difference]: With dead ends: 71234 [2022-11-20 12:19:13,765 INFO L226 Difference]: Without dead ends: 35630 [2022-11-20 12:19:13,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:19:13,791 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 739 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:19:13,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 50 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 12:19:13,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35630 states. [2022-11-20 12:19:14,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35630 to 31762. [2022-11-20 12:19:14,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31762 states, 31761 states have (on average 1.092408929189887) internal successors, (34696), 31761 states have internal predecessors, (34696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:14,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31762 states to 31762 states and 34696 transitions. [2022-11-20 12:19:14,492 INFO L78 Accepts]: Start accepts. Automaton has 31762 states and 34696 transitions. Word has length 360 [2022-11-20 12:19:14,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:19:14,492 INFO L495 AbstractCegarLoop]: Abstraction has 31762 states and 34696 transitions. [2022-11-20 12:19:14,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:14,493 INFO L276 IsEmpty]: Start isEmpty. Operand 31762 states and 34696 transitions. [2022-11-20 12:19:14,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-11-20 12:19:14,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:19:14,599 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:19:14,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 12:19:14,600 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:19:14,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:19:14,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1123440841, now seen corresponding path program 1 times [2022-11-20 12:19:14,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:19:14,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090169213] [2022-11-20 12:19:14,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:14,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:19:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 188 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:19:15,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:19:15,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090169213] [2022-11-20 12:19:15,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090169213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:19:15,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591359822] [2022-11-20 12:19:15,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:15,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:19:15,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:19:15,149 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:19:15,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:19:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:15,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:19:15,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:19:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-20 12:19:15,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:19:15,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591359822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:19:15,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:19:15,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-20 12:19:15,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264977446] [2022-11-20 12:19:15,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:19:15,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:19:15,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:19:15,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:19:15,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:19:15,671 INFO L87 Difference]: Start difference. First operand 31762 states and 34696 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 2 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:16,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:19:16,248 INFO L93 Difference]: Finished difference Result 82863 states and 90363 transitions. [2022-11-20 12:19:16,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:19:16,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 2 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 381 [2022-11-20 12:19:16,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:19:16,300 INFO L225 Difference]: With dead ends: 82863 [2022-11-20 12:19:16,301 INFO L226 Difference]: Without dead ends: 52324 [2022-11-20 12:19:16,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:19:16,323 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 179 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:19:16,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 474 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:19:16,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52324 states. [2022-11-20 12:19:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52324 to 49470. [2022-11-20 12:19:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49470 states, 49469 states have (on average 1.0892680264408012) internal successors, (53885), 49469 states have internal predecessors, (53885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:17,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49470 states to 49470 states and 53885 transitions. [2022-11-20 12:19:17,147 INFO L78 Accepts]: Start accepts. Automaton has 49470 states and 53885 transitions. Word has length 381 [2022-11-20 12:19:17,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:19:17,147 INFO L495 AbstractCegarLoop]: Abstraction has 49470 states and 53885 transitions. [2022-11-20 12:19:17,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 2 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:17,148 INFO L276 IsEmpty]: Start isEmpty. Operand 49470 states and 53885 transitions. [2022-11-20 12:19:17,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-11-20 12:19:17,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:19:17,166 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:19:17,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:19:17,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 12:19:17,368 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:19:17,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:19:17,368 INFO L85 PathProgramCache]: Analyzing trace with hash 851386247, now seen corresponding path program 1 times [2022-11-20 12:19:17,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:19:17,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559428934] [2022-11-20 12:19:17,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:17,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:19:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 182 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:19:19,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:19:19,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559428934] [2022-11-20 12:19:19,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559428934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:19:19,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733082399] [2022-11-20 12:19:19,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:19,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:19:19,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:19:19,660 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:19:19,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:19:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:20,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:19:20,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:19:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-20 12:19:20,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:19:20,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733082399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:19:20,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:19:20,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-11-20 12:19:20,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351903065] [2022-11-20 12:19:20,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:19:20,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:19:20,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:19:20,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:19:20,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:19:20,532 INFO L87 Difference]: Start difference. First operand 49470 states and 53885 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:19:21,700 INFO L93 Difference]: Finished difference Result 95085 states and 103732 transitions. [2022-11-20 12:19:21,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:19:21,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 381 [2022-11-20 12:19:21,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:19:21,772 INFO L225 Difference]: With dead ends: 95085 [2022-11-20 12:19:21,772 INFO L226 Difference]: Without dead ends: 48666 [2022-11-20 12:19:21,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:19:21,797 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 67 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:19:21,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 275 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 12:19:21,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48666 states. [2022-11-20 12:19:22,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48666 to 47643. [2022-11-20 12:19:22,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47643 states, 47642 states have (on average 1.0824482599387095) internal successors, (51570), 47642 states have internal predecessors, (51570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:22,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47643 states to 47643 states and 51570 transitions. [2022-11-20 12:19:22,560 INFO L78 Accepts]: Start accepts. Automaton has 47643 states and 51570 transitions. Word has length 381 [2022-11-20 12:19:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:19:22,561 INFO L495 AbstractCegarLoop]: Abstraction has 47643 states and 51570 transitions. [2022-11-20 12:19:22,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:22,561 INFO L276 IsEmpty]: Start isEmpty. Operand 47643 states and 51570 transitions. [2022-11-20 12:19:22,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-11-20 12:19:22,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:19:22,588 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:19:22,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:19:22,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 12:19:22,791 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:19:22,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:19:22,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1902302396, now seen corresponding path program 1 times [2022-11-20 12:19:22,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:19:22,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142630812] [2022-11-20 12:19:22,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:22,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:19:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-20 12:19:23,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:19:23,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142630812] [2022-11-20 12:19:23,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142630812] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:19:23,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:19:23,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:19:23,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749155715] [2022-11-20 12:19:23,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:19:23,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:19:23,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:19:23,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:19:23,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:19:23,542 INFO L87 Difference]: Start difference. First operand 47643 states and 51570 transitions. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 2 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:24,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:19:24,950 INFO L93 Difference]: Finished difference Result 111799 states and 121356 transitions. [2022-11-20 12:19:24,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:19:24,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 2 states have internal predecessors, (314), 0 states have call successors, (0), 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 447 [2022-11-20 12:19:24,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:19:25,015 INFO L225 Difference]: With dead ends: 111799 [2022-11-20 12:19:25,015 INFO L226 Difference]: Without dead ends: 67613 [2022-11-20 12:19:25,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:19:25,030 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 111 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:19:25,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 119 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:19:25,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67613 states. [2022-11-20 12:19:25,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67613 to 61318. [2022-11-20 12:19:26,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61318 states, 61317 states have (on average 1.0908720257024969) internal successors, (66889), 61317 states have internal predecessors, (66889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:26,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61318 states to 61318 states and 66889 transitions. [2022-11-20 12:19:26,108 INFO L78 Accepts]: Start accepts. Automaton has 61318 states and 66889 transitions. Word has length 447 [2022-11-20 12:19:26,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:19:26,109 INFO L495 AbstractCegarLoop]: Abstraction has 61318 states and 66889 transitions. [2022-11-20 12:19:26,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 2 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:26,109 INFO L276 IsEmpty]: Start isEmpty. Operand 61318 states and 66889 transitions. [2022-11-20 12:19:26,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2022-11-20 12:19:26,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:19:26,157 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:19:26,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 12:19:26,157 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:19:26,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:19:26,158 INFO L85 PathProgramCache]: Analyzing trace with hash -41546951, now seen corresponding path program 1 times [2022-11-20 12:19:26,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:19:26,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608201410] [2022-11-20 12:19:26,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:26,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:19:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 242 proven. 6 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-20 12:19:27,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:19:27,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608201410] [2022-11-20 12:19:27,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608201410] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:19:27,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914628821] [2022-11-20 12:19:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:27,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:19:27,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:19:27,210 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:19:27,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:19:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:27,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 12:19:27,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:19:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-20 12:19:28,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:19:28,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914628821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:19:28,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:19:28,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-20 12:19:28,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166749579] [2022-11-20 12:19:28,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:19:28,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:19:28,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:19:28,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:19:28,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:19:28,007 INFO L87 Difference]: Start difference. First operand 61318 states and 66889 transitions. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 2 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:28,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:19:28,879 INFO L93 Difference]: Finished difference Result 151962 states and 166488 transitions. [2022-11-20 12:19:28,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:19:28,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 2 states have internal predecessors, (335), 0 states have call successors, (0), 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 454 [2022-11-20 12:19:28,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:19:28,980 INFO L225 Difference]: With dead ends: 151962 [2022-11-20 12:19:28,980 INFO L226 Difference]: Without dead ends: 94304 [2022-11-20 12:19:29,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:19:29,012 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 158 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:19:29,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 389 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:19:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94304 states. [2022-11-20 12:19:30,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94304 to 93894. [2022-11-20 12:19:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93894 states, 93893 states have (on average 1.0963330599725218) internal successors, (102938), 93893 states have internal predecessors, (102938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:30,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93894 states to 93894 states and 102938 transitions. [2022-11-20 12:19:30,979 INFO L78 Accepts]: Start accepts. Automaton has 93894 states and 102938 transitions. Word has length 454 [2022-11-20 12:19:30,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:19:30,980 INFO L495 AbstractCegarLoop]: Abstraction has 93894 states and 102938 transitions. [2022-11-20 12:19:30,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 2 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:30,981 INFO L276 IsEmpty]: Start isEmpty. Operand 93894 states and 102938 transitions. [2022-11-20 12:19:31,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2022-11-20 12:19:31,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:19:31,032 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:19:31,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:19:31,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:19:31,233 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:19:31,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:19:31,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1606815490, now seen corresponding path program 1 times [2022-11-20 12:19:31,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:19:31,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15368399] [2022-11-20 12:19:31,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:31,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:19:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 265 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:19:34,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:19:34,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15368399] [2022-11-20 12:19:34,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15368399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:19:34,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828353950] [2022-11-20 12:19:34,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:34,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:19:34,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:19:34,461 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:19:34,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:19:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:34,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:19:34,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:19:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-20 12:19:35,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:19:35,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828353950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:19:35,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:19:35,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-11-20 12:19:35,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879204948] [2022-11-20 12:19:35,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:19:35,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:19:35,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:19:35,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:19:35,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:19:35,379 INFO L87 Difference]: Start difference. First operand 93894 states and 102938 transitions. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:36,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:19:36,995 INFO L93 Difference]: Finished difference Result 216300 states and 237902 transitions. [2022-11-20 12:19:36,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:19:36,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 462 [2022-11-20 12:19:36,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:19:36,997 INFO L225 Difference]: With dead ends: 216300 [2022-11-20 12:19:36,997 INFO L226 Difference]: Without dead ends: 0 [2022-11-20 12:19:37,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:19:37,052 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 113 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:19:37,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 92 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:19:37,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-20 12:19:37,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-20 12:19:37,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:37,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-20 12:19:37,053 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 462 [2022-11-20 12:19:37,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:19:37,054 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 12:19:37,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:37,054 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-20 12:19:37,055 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-20 12:19:37,058 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 12:19:37,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:19:37,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de257c8-f5ab-4951-b5ef-0fbaf02c2a1c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:19:37,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-20 12:19:47,584 WARN L233 SmtUtils]: Spent 10.30s on a formula simplification that was a NOOP. DAG size: 966 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)