./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label51.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label51.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 31805de0830de2b1932982a70f950995cd5cf878b2a5369c2a4d1555e822907c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 21:23:40,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:23:40,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:23:40,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:23:40,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:23:40,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:23:40,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:23:40,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:23:40,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:23:40,213 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:23:40,214 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:23:40,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:23:40,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:23:40,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:23:40,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:23:40,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:23:40,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:23:40,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:23:40,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:23:40,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:23:40,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:23:40,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:23:40,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:23:40,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:23:40,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:23:40,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:23:40,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:23:40,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:23:40,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:23:40,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:23:40,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:23:40,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:23:40,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:23:40,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:23:40,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:23:40,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:23:40,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:23:40,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:23:40,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:23:40,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:23:40,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:23:40,238 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 21:23:40,263 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:23:40,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:23:40,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:23:40,264 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:23:40,264 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:23:40,265 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:23:40,265 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:23:40,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:23:40,266 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:23:40,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:23:40,266 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:23:40,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:23:40,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:23:40,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:23:40,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 21:23:40,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:23:40,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 21:23:40,267 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:23:40,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 21:23:40,267 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:23:40,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 21:23:40,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:23:40,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:23:40,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:23:40,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:23:40,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:23:40,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:23:40,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 21:23:40,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 21:23:40,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 21:23:40,269 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:23:40,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 21:23:40,270 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:23:40,270 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:23:40,270 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:23:40,270 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31805de0830de2b1932982a70f950995cd5cf878b2a5369c2a4d1555e822907c [2022-12-13 21:23:40,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:23:40,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:23:40,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:23:40,466 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:23:40,467 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:23:40,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/eca-rers2012/Problem19_label51.c [2022-12-13 21:23:43,068 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:23:43,491 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:23:43,491 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/sv-benchmarks/c/eca-rers2012/Problem19_label51.c [2022-12-13 21:23:43,523 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/data/752f2a538/bd12ce7d4aa542e4bec80d644eab5c25/FLAGa54e574d0 [2022-12-13 21:23:43,537 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/data/752f2a538/bd12ce7d4aa542e4bec80d644eab5c25 [2022-12-13 21:23:43,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:23:43,540 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:23:43,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:23:43,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:23:43,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:23:43,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:23:43" (1/1) ... [2022-12-13 21:23:43,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@691bb28b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:43, skipping insertion in model container [2022-12-13 21:23:43,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:23:43" (1/1) ... [2022-12-13 21:23:43,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:23:43,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:23:43,974 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_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/sv-benchmarks/c/eca-rers2012/Problem19_label51.c[2619,2632] [2022-12-13 21:23:44,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:23:44,976 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:23:44,987 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_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/sv-benchmarks/c/eca-rers2012/Problem19_label51.c[2619,2632] [2022-12-13 21:23:45,625 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:23:45,647 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:23:45,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:45 WrapperNode [2022-12-13 21:23:45,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:23:45,649 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:23:45,649 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:23:45,649 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:23:45,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:45" (1/1) ... [2022-12-13 21:23:45,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:45" (1/1) ... [2022-12-13 21:23:46,265 INFO L138 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2022-12-13 21:23:46,265 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:23:46,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:23:46,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:23:46,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:23:46,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:45" (1/1) ... [2022-12-13 21:23:46,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:45" (1/1) ... [2022-12-13 21:23:46,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:45" (1/1) ... [2022-12-13 21:23:46,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:45" (1/1) ... [2022-12-13 21:23:46,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:45" (1/1) ... [2022-12-13 21:23:46,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:45" (1/1) ... [2022-12-13 21:23:46,751 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:45" (1/1) ... [2022-12-13 21:23:46,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:45" (1/1) ... [2022-12-13 21:23:46,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:23:46,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:23:46,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:23:46,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:23:46,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:45" (1/1) ... [2022-12-13 21:23:46,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:23:46,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:23:46,934 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:23:46,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:23:46,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:23:46,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 21:23:46,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:23:46,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:23:47,040 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:23:47,042 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:23:53,950 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:23:53,967 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:23:53,967 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 21:23:53,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:23:53 BoogieIcfgContainer [2022-12-13 21:23:53,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:23:53,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:23:53,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:23:53,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:23:53,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:23:43" (1/3) ... [2022-12-13 21:23:53,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7e31d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:23:53, skipping insertion in model container [2022-12-13 21:23:53,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:45" (2/3) ... [2022-12-13 21:23:53,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7e31d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:23:53, skipping insertion in model container [2022-12-13 21:23:53,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:23:53" (3/3) ... [2022-12-13 21:23:53,976 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label51.c [2022-12-13 21:23:53,990 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:23:53,990 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 21:23:54,048 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:23:54,053 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;@65ce9908, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:23:54,053 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 21:23:54,062 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 21:23:54,067 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:23:54,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:54,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:23:54,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:54,072 INFO L85 PathProgramCache]: Analyzing trace with hash 156847385, now seen corresponding path program 1 times [2022-12-13 21:23:54,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:54,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559422506] [2022-12-13 21:23:54,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:54,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:54,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:54,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559422506] [2022-12-13 21:23:54,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559422506] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:54,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:54,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:23:54,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621617607] [2022-12-13 21:23:54,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:54,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:23:54,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:54,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:23:54,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:23:54,268 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:01,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:24:01,193 INFO L93 Difference]: Finished difference Result 4957 states and 9398 transitions. [2022-12-13 21:24:01,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:24:01,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-13 21:24:01,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:24:01,228 INFO L225 Difference]: With dead ends: 4957 [2022-12-13 21:24:01,228 INFO L226 Difference]: Without dead ends: 3129 [2022-12-13 21:24:01,236 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 [2022-12-13 21:24:01,240 INFO L413 NwaCegarLoop]: 1373 mSDtfsCounter, 1609 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 4344 mSolverCounterSat, 1517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1609 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 5861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 4344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-12-13 21:24:01,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1609 Valid, 1595 Invalid, 5861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1517 Valid, 4344 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-12-13 21:24:01,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2022-12-13 21:24:01,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3108. [2022-12-13 21:24:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 1.6012230447376892) internal successors, (4975), 3107 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4975 transitions. [2022-12-13 21:24:01,387 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4975 transitions. Word has length 17 [2022-12-13 21:24:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:24:01,388 INFO L495 AbstractCegarLoop]: Abstraction has 3108 states and 4975 transitions. [2022-12-13 21:24:01,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:01,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4975 transitions. [2022-12-13 21:24:01,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-13 21:24:01,392 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:24:01,392 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:24:01,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 21:24:01,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:24:01,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:24:01,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1541486348, now seen corresponding path program 1 times [2022-12-13 21:24:01,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:24:01,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198483410] [2022-12-13 21:24:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:24:01,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:24:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:24:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:24:01,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:24:01,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198483410] [2022-12-13 21:24:01,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198483410] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:24:01,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:24:01,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:24:01,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449219945] [2022-12-13 21:24:01,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:24:01,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:24:01,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:24:01,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:24:01,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:24:01,760 INFO L87 Difference]: Start difference. First operand 3108 states and 4975 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:11,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:24:11,869 INFO L93 Difference]: Finished difference Result 10359 states and 16187 transitions. [2022-12-13 21:24:11,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:24:11,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-12-13 21:24:11,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:24:11,885 INFO L225 Difference]: With dead ends: 10359 [2022-12-13 21:24:11,885 INFO L226 Difference]: Without dead ends: 7253 [2022-12-13 21:24:11,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:24:11,889 INFO L413 NwaCegarLoop]: 1024 mSDtfsCounter, 4323 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 9504 mSolverCounterSat, 1498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4323 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 11002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1498 IncrementalHoareTripleChecker+Valid, 9504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-12-13 21:24:11,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4323 Valid, 1292 Invalid, 11002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1498 Valid, 9504 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-12-13 21:24:11,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7253 states. [2022-12-13 21:24:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7253 to 7249. [2022-12-13 21:24:11,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7249 states, 7248 states have (on average 1.4503311258278146) internal successors, (10512), 7248 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:11,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 10512 transitions. [2022-12-13 21:24:11,981 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 10512 transitions. Word has length 84 [2022-12-13 21:24:11,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:24:11,981 INFO L495 AbstractCegarLoop]: Abstraction has 7249 states and 10512 transitions. [2022-12-13 21:24:11,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:11,982 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 10512 transitions. [2022-12-13 21:24:11,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-12-13 21:24:11,986 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:24:11,986 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:24:11,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 21:24:11,987 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:24:11,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:24:11,987 INFO L85 PathProgramCache]: Analyzing trace with hash 592344978, now seen corresponding path program 1 times [2022-12-13 21:24:11,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:24:11,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675450621] [2022-12-13 21:24:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:24:11,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:24:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:24:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 21:24:12,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:24:12,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675450621] [2022-12-13 21:24:12,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675450621] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:24:12,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:24:12,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:24:12,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489728887] [2022-12-13 21:24:12,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:24:12,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:24:12,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:24:12,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:24:12,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:24:12,725 INFO L87 Difference]: Start difference. First operand 7249 states and 10512 transitions. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:24:22,052 INFO L93 Difference]: Finished difference Result 17269 states and 24867 transitions. [2022-12-13 21:24:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:24:22,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 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 291 [2022-12-13 21:24:22,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:24:22,070 INFO L225 Difference]: With dead ends: 17269 [2022-12-13 21:24:22,070 INFO L226 Difference]: Without dead ends: 11387 [2022-12-13 21:24:22,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:24:22,075 INFO L413 NwaCegarLoop]: 1803 mSDtfsCounter, 3756 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 9455 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3756 SdHoareTripleChecker+Valid, 2157 SdHoareTripleChecker+Invalid, 9885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 9455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-12-13 21:24:22,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3756 Valid, 2157 Invalid, 9885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 9455 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-12-13 21:24:22,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11387 states. [2022-12-13 21:24:22,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11387 to 11367. [2022-12-13 21:24:22,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11367 states, 11366 states have (on average 1.3286116487770543) internal successors, (15101), 11366 states have internal predecessors, (15101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:22,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 15101 transitions. [2022-12-13 21:24:22,213 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 15101 transitions. Word has length 291 [2022-12-13 21:24:22,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:24:22,213 INFO L495 AbstractCegarLoop]: Abstraction has 11367 states and 15101 transitions. [2022-12-13 21:24:22,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:22,214 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 15101 transitions. [2022-12-13 21:24:22,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-12-13 21:24:22,216 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:24:22,216 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:24:22,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 21:24:22,216 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:24:22,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:24:22,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1298696468, now seen corresponding path program 1 times [2022-12-13 21:24:22,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:24:22,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264245423] [2022-12-13 21:24:22,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:24:22,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:24:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:24:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:24:22,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:24:22,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264245423] [2022-12-13 21:24:22,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264245423] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:24:22,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:24:22,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:24:22,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757858316] [2022-12-13 21:24:22,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:24:22,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:24:22,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:24:22,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:24:22,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:24:22,647 INFO L87 Difference]: Start difference. First operand 11367 states and 15101 transitions. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:29,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:24:29,548 INFO L93 Difference]: Finished difference Result 20033 states and 27483 transitions. [2022-12-13 21:24:29,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:24:29,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 319 [2022-12-13 21:24:29,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:24:29,566 INFO L225 Difference]: With dead ends: 20033 [2022-12-13 21:24:29,566 INFO L226 Difference]: Without dead ends: 11367 [2022-12-13 21:24:29,571 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 [2022-12-13 21:24:29,572 INFO L413 NwaCegarLoop]: 1775 mSDtfsCounter, 1138 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7325 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 7333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-12-13 21:24:29,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1138 Valid, 2117 Invalid, 7333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 7325 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-12-13 21:24:29,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11367 states. [2022-12-13 21:24:29,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11367 to 11367. [2022-12-13 21:24:29,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11367 states, 11366 states have (on average 1.3274678866795706) internal successors, (15088), 11366 states have internal predecessors, (15088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 15088 transitions. [2022-12-13 21:24:29,689 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 15088 transitions. Word has length 319 [2022-12-13 21:24:29,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:24:29,689 INFO L495 AbstractCegarLoop]: Abstraction has 11367 states and 15088 transitions. [2022-12-13 21:24:29,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:29,690 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 15088 transitions. [2022-12-13 21:24:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2022-12-13 21:24:29,695 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:24:29,696 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:24:29,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 21:24:29,696 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:24:29,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:24:29,696 INFO L85 PathProgramCache]: Analyzing trace with hash -461234360, now seen corresponding path program 1 times [2022-12-13 21:24:29,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:24:29,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759336904] [2022-12-13 21:24:29,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:24:29,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:24:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:24:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:24:30,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:24:30,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759336904] [2022-12-13 21:24:30,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759336904] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:24:30,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273338923] [2022-12-13 21:24:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:24:30,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:24:30,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:24:30,321 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:24:30,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 21:24:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:24:30,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 21:24:30,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:24:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 21:24:31,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:24:31,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273338923] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:24:31,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:24:31,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-13 21:24:31,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371224768] [2022-12-13 21:24:31,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:24:31,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:24:31,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:24:31,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:24:31,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:24:31,044 INFO L87 Difference]: Start difference. First operand 11367 states and 15088 transitions. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:36,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:24:36,386 INFO L93 Difference]: Finished difference Result 24133 states and 33157 transitions. [2022-12-13 21:24:36,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:24:36,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 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 504 [2022-12-13 21:24:36,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:24:36,405 INFO L225 Difference]: With dead ends: 24133 [2022-12-13 21:24:36,406 INFO L226 Difference]: Without dead ends: 15498 [2022-12-13 21:24:36,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:24:36,413 INFO L413 NwaCegarLoop]: 1207 mSDtfsCounter, 1058 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4576 mSolverCounterSat, 809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 5385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 4576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-12-13 21:24:36,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1058 Valid, 1384 Invalid, 5385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [809 Valid, 4576 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-12-13 21:24:36,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15498 states. [2022-12-13 21:24:36,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15498 to 15496. [2022-12-13 21:24:36,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15496 states, 15495 states have (on average 1.2933849628912553) internal successors, (20041), 15495 states have internal predecessors, (20041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:36,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15496 states to 15496 states and 20041 transitions. [2022-12-13 21:24:36,555 INFO L78 Accepts]: Start accepts. Automaton has 15496 states and 20041 transitions. Word has length 504 [2022-12-13 21:24:36,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:24:36,556 INFO L495 AbstractCegarLoop]: Abstraction has 15496 states and 20041 transitions. [2022-12-13 21:24:36,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:36,556 INFO L276 IsEmpty]: Start isEmpty. Operand 15496 states and 20041 transitions. [2022-12-13 21:24:36,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2022-12-13 21:24:36,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:24:36,565 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:24:36,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 21:24:36,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:24:36,767 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:24:36,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:24:36,768 INFO L85 PathProgramCache]: Analyzing trace with hash 656512723, now seen corresponding path program 1 times [2022-12-13 21:24:36,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:24:36,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724545518] [2022-12-13 21:24:36,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:24:36,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:24:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:24:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 51 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:24:37,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:24:37,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724545518] [2022-12-13 21:24:37,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724545518] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:24:37,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899912350] [2022-12-13 21:24:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:24:37,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:24:37,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:24:37,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:24:37,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 21:24:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:24:37,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 21:24:37,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:24:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:24:37,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:24:37,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899912350] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:24:37,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:24:37,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-13 21:24:37,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070121747] [2022-12-13 21:24:37,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:24:37,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:24:37,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:24:37,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:24:37,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:24:37,683 INFO L87 Difference]: Start difference. First operand 15496 states and 20041 transitions. Second operand has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:43,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:24:43,758 INFO L93 Difference]: Finished difference Result 40540 states and 53991 transitions. [2022-12-13 21:24:43,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:24:43,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 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 573 [2022-12-13 21:24:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:24:43,787 INFO L225 Difference]: With dead ends: 40540 [2022-12-13 21:24:43,787 INFO L226 Difference]: Without dead ends: 27776 [2022-12-13 21:24:43,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:24:43,795 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 2531 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4053 mSolverCounterSat, 1472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2531 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 5525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1472 IncrementalHoareTripleChecker+Valid, 4053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-12-13 21:24:43,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2531 Valid, 814 Invalid, 5525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1472 Valid, 4053 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-12-13 21:24:43,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27776 states. [2022-12-13 21:24:44,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27776 to 27772. [2022-12-13 21:24:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27772 states, 27771 states have (on average 1.2915271326203595) internal successors, (35867), 27771 states have internal predecessors, (35867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:44,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27772 states to 27772 states and 35867 transitions. [2022-12-13 21:24:44,061 INFO L78 Accepts]: Start accepts. Automaton has 27772 states and 35867 transitions. Word has length 573 [2022-12-13 21:24:44,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:24:44,062 INFO L495 AbstractCegarLoop]: Abstraction has 27772 states and 35867 transitions. [2022-12-13 21:24:44,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:44,062 INFO L276 IsEmpty]: Start isEmpty. Operand 27772 states and 35867 transitions. [2022-12-13 21:24:44,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2022-12-13 21:24:44,065 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:24:44,065 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:24:44,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 21:24:44,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 21:24:44,267 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:24:44,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:24:44,268 INFO L85 PathProgramCache]: Analyzing trace with hash 2035154074, now seen corresponding path program 1 times [2022-12-13 21:24:44,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:24:44,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491025371] [2022-12-13 21:24:44,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:24:44,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:24:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:24:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-13 21:24:44,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:24:44,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491025371] [2022-12-13 21:24:44,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491025371] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:24:44,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:24:44,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:24:44,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104248325] [2022-12-13 21:24:44,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:24:44,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:24:44,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:24:44,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:24:44,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:24:44,575 INFO L87 Difference]: Start difference. First operand 27772 states and 35867 transitions. Second operand has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 2 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:49,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:24:49,452 INFO L93 Difference]: Finished difference Result 58285 states and 75896 transitions. [2022-12-13 21:24:49,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:24:49,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 2 states have internal predecessors, (506), 0 states have call successors, (0), 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 578 [2022-12-13 21:24:49,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:24:49,488 INFO L225 Difference]: With dead ends: 58285 [2022-12-13 21:24:49,489 INFO L226 Difference]: Without dead ends: 33245 [2022-12-13 21:24:49,504 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 [2022-12-13 21:24:49,505 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 1383 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3925 mSolverCounterSat, 1660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 5585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1660 IncrementalHoareTripleChecker+Valid, 3925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-12-13 21:24:49,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1383 Valid, 733 Invalid, 5585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1660 Valid, 3925 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-12-13 21:24:49,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33245 states. [2022-12-13 21:24:49,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33245 to 33235. [2022-12-13 21:24:49,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33235 states, 33234 states have (on average 1.228771739784558) internal successors, (40837), 33234 states have internal predecessors, (40837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:49,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33235 states to 33235 states and 40837 transitions. [2022-12-13 21:24:49,792 INFO L78 Accepts]: Start accepts. Automaton has 33235 states and 40837 transitions. Word has length 578 [2022-12-13 21:24:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:24:49,793 INFO L495 AbstractCegarLoop]: Abstraction has 33235 states and 40837 transitions. [2022-12-13 21:24:49,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 2 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:49,793 INFO L276 IsEmpty]: Start isEmpty. Operand 33235 states and 40837 transitions. [2022-12-13 21:24:49,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2022-12-13 21:24:49,797 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:24:49,797 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:24:49,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 21:24:49,797 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:24:49,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:24:49,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1313395776, now seen corresponding path program 1 times [2022-12-13 21:24:49,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:24:49,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992376046] [2022-12-13 21:24:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:24:49,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:24:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:24:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-13 21:24:50,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:24:50,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992376046] [2022-12-13 21:24:50,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992376046] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:24:50,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:24:50,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:24:50,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488777835] [2022-12-13 21:24:50,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:24:50,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:24:50,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:24:50,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:24:50,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:24:50,142 INFO L87 Difference]: Start difference. First operand 33235 states and 40837 transitions. Second operand has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 2 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:56,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:24:56,608 INFO L93 Difference]: Finished difference Result 91260 states and 113481 transitions. [2022-12-13 21:24:56,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:24:56,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 2 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 595 [2022-12-13 21:24:56,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:24:56,672 INFO L225 Difference]: With dead ends: 91260 [2022-12-13 21:24:56,672 INFO L226 Difference]: Without dead ends: 60757 [2022-12-13 21:24:56,695 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 [2022-12-13 21:24:56,695 INFO L413 NwaCegarLoop]: 1747 mSDtfsCounter, 1350 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 4280 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 5710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-12-13 21:24:56,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1350 Valid, 2013 Invalid, 5710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4280 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-12-13 21:24:56,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60757 states. [2022-12-13 21:24:57,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60757 to 55276. [2022-12-13 21:24:57,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55276 states, 55275 states have (on average 1.1672003618272275) internal successors, (64517), 55275 states have internal predecessors, (64517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:57,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55276 states to 55276 states and 64517 transitions. [2022-12-13 21:24:57,241 INFO L78 Accepts]: Start accepts. Automaton has 55276 states and 64517 transitions. Word has length 595 [2022-12-13 21:24:57,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:24:57,242 INFO L495 AbstractCegarLoop]: Abstraction has 55276 states and 64517 transitions. [2022-12-13 21:24:57,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 2 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:57,242 INFO L276 IsEmpty]: Start isEmpty. Operand 55276 states and 64517 transitions. [2022-12-13 21:24:57,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2022-12-13 21:24:57,247 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:24:57,247 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:24:57,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 21:24:57,248 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:24:57,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:24:57,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2084702932, now seen corresponding path program 1 times [2022-12-13 21:24:57,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:24:57,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517826537] [2022-12-13 21:24:57,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:24:57,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:24:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:24:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 29 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:24:58,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:24:58,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517826537] [2022-12-13 21:24:58,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517826537] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:24:58,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325100570] [2022-12-13 21:24:58,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:24:58,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:24:58,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:24:58,784 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:24:58,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 21:24:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:24:59,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 21:24:59,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:24:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-12-13 21:24:59,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:24:59,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325100570] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:24:59,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:24:59,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-12-13 21:24:59,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442880106] [2022-12-13 21:24:59,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:24:59,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:24:59,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:24:59,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:24:59,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:24:59,086 INFO L87 Difference]: Start difference. First operand 55276 states and 64517 transitions. Second operand has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:06,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:25:06,003 INFO L93 Difference]: Finished difference Result 139320 states and 165177 transitions. [2022-12-13 21:25:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:25:06,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 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 711 [2022-12-13 21:25:06,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:25:06,113 INFO L225 Difference]: With dead ends: 139320 [2022-12-13 21:25:06,113 INFO L226 Difference]: Without dead ends: 86776 [2022-12-13 21:25:06,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 710 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:25:06,128 INFO L413 NwaCegarLoop]: 2809 mSDtfsCounter, 1502 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 4089 mSolverCounterSat, 1787 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 2978 SdHoareTripleChecker+Invalid, 5876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1787 IncrementalHoareTripleChecker+Valid, 4089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-12-13 21:25:06,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1502 Valid, 2978 Invalid, 5876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1787 Valid, 4089 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-12-13 21:25:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86776 states. [2022-12-13 21:25:06,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86776 to 85338. [2022-12-13 21:25:06,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85338 states, 85337 states have (on average 1.1431032260332563) internal successors, (97549), 85337 states have internal predecessors, (97549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:06,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85338 states to 85338 states and 97549 transitions. [2022-12-13 21:25:06,824 INFO L78 Accepts]: Start accepts. Automaton has 85338 states and 97549 transitions. Word has length 711 [2022-12-13 21:25:06,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:25:06,824 INFO L495 AbstractCegarLoop]: Abstraction has 85338 states and 97549 transitions. [2022-12-13 21:25:06,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:06,824 INFO L276 IsEmpty]: Start isEmpty. Operand 85338 states and 97549 transitions. [2022-12-13 21:25:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2022-12-13 21:25:06,829 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:25:06,829 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:25:06,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 21:25:07,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:25:07,031 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:25:07,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:25:07,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2009224438, now seen corresponding path program 1 times [2022-12-13 21:25:07,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:25:07,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051621746] [2022-12-13 21:25:07,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:25:07,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:25:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:25:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 29 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:25:08,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:25:08,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051621746] [2022-12-13 21:25:08,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051621746] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:25:08,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671686145] [2022-12-13 21:25:08,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:25:08,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:25:08,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:25:08,560 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:25:08,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 21:25:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:25:08,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 21:25:08,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:25:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-12-13 21:25:08,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:25:08,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671686145] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:25:08,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:25:08,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-12-13 21:25:08,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904288687] [2022-12-13 21:25:08,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:25:08,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:25:08,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:25:08,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:25:08,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:25:08,812 INFO L87 Difference]: Start difference. First operand 85338 states and 97549 transitions. Second operand has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:16,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:25:16,508 INFO L93 Difference]: Finished difference Result 209000 states and 241237 transitions. [2022-12-13 21:25:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:25:16,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 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 723 [2022-12-13 21:25:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:25:16,630 INFO L225 Difference]: With dead ends: 209000 [2022-12-13 21:25:16,630 INFO L226 Difference]: Without dead ends: 126394 [2022-12-13 21:25:16,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 722 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:25:16,663 INFO L413 NwaCegarLoop]: 3161 mSDtfsCounter, 1464 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 5068 mSolverCounterSat, 990 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 3334 SdHoareTripleChecker+Invalid, 6058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 990 IncrementalHoareTripleChecker+Valid, 5068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-12-13 21:25:16,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1464 Valid, 3334 Invalid, 6058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [990 Valid, 5068 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-12-13 21:25:16,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126394 states. [2022-12-13 21:25:17,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126394 to 124940. [2022-12-13 21:25:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124940 states, 124939 states have (on average 1.1232521470477592) internal successors, (140338), 124939 states have internal predecessors, (140338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:17,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124940 states to 124940 states and 140338 transitions. [2022-12-13 21:25:17,913 INFO L78 Accepts]: Start accepts. Automaton has 124940 states and 140338 transitions. Word has length 723 [2022-12-13 21:25:17,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:25:17,914 INFO L495 AbstractCegarLoop]: Abstraction has 124940 states and 140338 transitions. [2022-12-13 21:25:17,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:17,914 INFO L276 IsEmpty]: Start isEmpty. Operand 124940 states and 140338 transitions. [2022-12-13 21:25:17,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2022-12-13 21:25:17,919 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:25:17,920 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:25:17,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 21:25:18,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:25:18,120 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:25:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:25:18,121 INFO L85 PathProgramCache]: Analyzing trace with hash -635314399, now seen corresponding path program 1 times [2022-12-13 21:25:18,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:25:18,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887313974] [2022-12-13 21:25:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:25:18,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:25:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:25:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-12-13 21:25:18,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:25:18,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887313974] [2022-12-13 21:25:18,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887313974] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:25:18,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:25:18,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:25:18,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791234736] [2022-12-13 21:25:18,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:25:18,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:25:18,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:25:18,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:25:18,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:25:18,612 INFO L87 Difference]: Start difference. First operand 124940 states and 140338 transitions. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:25,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:25:25,999 INFO L93 Difference]: Finished difference Result 288122 states and 327838 transitions. [2022-12-13 21:25:25,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:25:25,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 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 810 [2022-12-13 21:25:26,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:25:26,152 INFO L225 Difference]: With dead ends: 288122 [2022-12-13 21:25:26,152 INFO L226 Difference]: Without dead ends: 165914 [2022-12-13 21:25:26,185 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 [2022-12-13 21:25:26,186 INFO L413 NwaCegarLoop]: 1548 mSDtfsCounter, 1513 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 4037 mSolverCounterSat, 1672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 5709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1672 IncrementalHoareTripleChecker+Valid, 4037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-12-13 21:25:26,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1513 Valid, 1742 Invalid, 5709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1672 Valid, 4037 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-12-13 21:25:26,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165914 states. [2022-12-13 21:25:27,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165914 to 130334. [2022-12-13 21:25:27,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130334 states, 130333 states have (on average 1.1208059355650526) internal successors, (146078), 130333 states have internal predecessors, (146078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:27,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130334 states to 130334 states and 146078 transitions. [2022-12-13 21:25:27,603 INFO L78 Accepts]: Start accepts. Automaton has 130334 states and 146078 transitions. Word has length 810 [2022-12-13 21:25:27,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:25:27,604 INFO L495 AbstractCegarLoop]: Abstraction has 130334 states and 146078 transitions. [2022-12-13 21:25:27,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:27,604 INFO L276 IsEmpty]: Start isEmpty. Operand 130334 states and 146078 transitions. [2022-12-13 21:25:27,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 877 [2022-12-13 21:25:27,611 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:25:27,611 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:25:27,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 21:25:27,611 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:25:27,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:25:27,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1022836581, now seen corresponding path program 1 times [2022-12-13 21:25:27,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:25:27,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641911373] [2022-12-13 21:25:27,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:25:27,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:25:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:25:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 363 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-12-13 21:25:28,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:25:28,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641911373] [2022-12-13 21:25:28,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641911373] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:25:28,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:25:28,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:25:28,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083611614] [2022-12-13 21:25:28,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:25:28,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:25:28,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:25:28,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:25:28,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:25:28,913 INFO L87 Difference]: Start difference. First operand 130334 states and 146078 transitions. Second operand has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:34,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:25:34,804 INFO L93 Difference]: Finished difference Result 258003 states and 289527 transitions. [2022-12-13 21:25:34,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:25:34,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 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 876 [2022-12-13 21:25:34,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:25:34,927 INFO L225 Difference]: With dead ends: 258003 [2022-12-13 21:25:34,927 INFO L226 Difference]: Without dead ends: 130401 [2022-12-13 21:25:34,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:25:34,963 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 1594 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 4240 mSolverCounterSat, 1589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1594 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 5829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1589 IncrementalHoareTripleChecker+Valid, 4240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-12-13 21:25:34,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1594 Valid, 612 Invalid, 5829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1589 Valid, 4240 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-12-13 21:25:35,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130401 states. [2022-12-13 21:25:36,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130401 to 130327. [2022-12-13 21:25:36,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130327 states, 130326 states have (on average 1.1173902367908168) internal successors, (145625), 130326 states have internal predecessors, (145625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:36,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130327 states to 130327 states and 145625 transitions. [2022-12-13 21:25:36,511 INFO L78 Accepts]: Start accepts. Automaton has 130327 states and 145625 transitions. Word has length 876 [2022-12-13 21:25:36,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:25:36,512 INFO L495 AbstractCegarLoop]: Abstraction has 130327 states and 145625 transitions. [2022-12-13 21:25:36,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:36,512 INFO L276 IsEmpty]: Start isEmpty. Operand 130327 states and 145625 transitions. [2022-12-13 21:25:36,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2022-12-13 21:25:36,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:25:36,518 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:25:36,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 21:25:36,518 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:25:36,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:25:36,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1682646548, now seen corresponding path program 1 times [2022-12-13 21:25:36,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:25:36,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466944863] [2022-12-13 21:25:36,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:25:36,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:25:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:25:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 45 proven. 380 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-12-13 21:25:37,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:25:37,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466944863] [2022-12-13 21:25:37,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466944863] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:25:37,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921248927] [2022-12-13 21:25:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:25:37,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:25:37,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:25:37,746 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:25:37,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 21:25:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:25:37,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 21:25:37,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:25:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2022-12-13 21:25:38,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:25:38,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921248927] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:25:38,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:25:38,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-13 21:25:38,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687443910] [2022-12-13 21:25:38,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:25:38,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:25:38,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:25:38,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:25:38,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:25:38,053 INFO L87 Difference]: Start difference. First operand 130327 states and 145625 transitions. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:44,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:25:44,692 INFO L93 Difference]: Finished difference Result 294898 states and 333187 transitions. [2022-12-13 21:25:44,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:25:44,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 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 877 [2022-12-13 21:25:44,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:25:44,850 INFO L225 Difference]: With dead ends: 294898 [2022-12-13 21:25:44,850 INFO L226 Difference]: Without dead ends: 167303 [2022-12-13 21:25:44,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 877 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:25:44,889 INFO L413 NwaCegarLoop]: 1230 mSDtfsCounter, 1537 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4200 mSolverCounterSat, 1772 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 5972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1772 IncrementalHoareTripleChecker+Valid, 4200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-12-13 21:25:44,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1537 Valid, 1356 Invalid, 5972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1772 Valid, 4200 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-12-13 21:25:45,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167303 states. [2022-12-13 21:25:46,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167303 to 165820. [2022-12-13 21:25:46,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165820 states, 165819 states have (on average 1.1230739541307089) internal successors, (186227), 165819 states have internal predecessors, (186227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:46,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165820 states to 165820 states and 186227 transitions. [2022-12-13 21:25:46,937 INFO L78 Accepts]: Start accepts. Automaton has 165820 states and 186227 transitions. Word has length 877 [2022-12-13 21:25:46,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:25:46,937 INFO L495 AbstractCegarLoop]: Abstraction has 165820 states and 186227 transitions. [2022-12-13 21:25:46,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:46,938 INFO L276 IsEmpty]: Start isEmpty. Operand 165820 states and 186227 transitions. [2022-12-13 21:25:46,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2022-12-13 21:25:46,944 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:25:46,945 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:25:46,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 21:25:47,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 21:25:47,147 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:25:47,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:25:47,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1654257014, now seen corresponding path program 1 times [2022-12-13 21:25:47,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:25:47,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835900324] [2022-12-13 21:25:47,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:25:47,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:25:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:25:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-12-13 21:25:47,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:25:47,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835900324] [2022-12-13 21:25:47,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835900324] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:25:47,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:25:47,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:25:47,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175499606] [2022-12-13 21:25:47,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:25:47,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:25:47,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:25:47,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:25:47,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:25:47,686 INFO L87 Difference]: Start difference. First operand 165820 states and 186227 transitions. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:53,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:25:53,349 INFO L93 Difference]: Finished difference Result 335735 states and 376722 transitions. [2022-12-13 21:25:53,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:25:53,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 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 907 [2022-12-13 21:25:53,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:25:53,513 INFO L225 Difference]: With dead ends: 335735 [2022-12-13 21:25:53,513 INFO L226 Difference]: Without dead ends: 172647 [2022-12-13 21:25:53,567 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 [2022-12-13 21:25:53,568 INFO L413 NwaCegarLoop]: 2881 mSDtfsCounter, 1503 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 3666 mSolverCounterSat, 1464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1503 SdHoareTripleChecker+Valid, 3057 SdHoareTripleChecker+Invalid, 5130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1464 IncrementalHoareTripleChecker+Valid, 3666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-13 21:25:53,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1503 Valid, 3057 Invalid, 5130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1464 Valid, 3666 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-13 21:25:53,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172647 states. [2022-12-13 21:25:55,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172647 to 167180. [2022-12-13 21:25:55,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167180 states, 167179 states have (on average 1.0890482656314489) internal successors, (182066), 167179 states have internal predecessors, (182066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167180 states to 167180 states and 182066 transitions. [2022-12-13 21:25:55,324 INFO L78 Accepts]: Start accepts. Automaton has 167180 states and 182066 transitions. Word has length 907 [2022-12-13 21:25:55,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:25:55,325 INFO L495 AbstractCegarLoop]: Abstraction has 167180 states and 182066 transitions. [2022-12-13 21:25:55,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 167180 states and 182066 transitions. [2022-12-13 21:25:55,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 925 [2022-12-13 21:25:55,337 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:25:55,338 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:25:55,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 21:25:55,338 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:25:55,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:25:55,339 INFO L85 PathProgramCache]: Analyzing trace with hash 47899381, now seen corresponding path program 1 times [2022-12-13 21:25:55,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:25:55,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774242499] [2022-12-13 21:25:55,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:25:55,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:25:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:25:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 543 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-12-13 21:25:56,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:25:56,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774242499] [2022-12-13 21:25:56,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774242499] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:25:56,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:25:56,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:25:56,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017098183] [2022-12-13 21:25:56,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:25:56,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:25:56,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:25:56,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:25:56,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:25:56,052 INFO L87 Difference]: Start difference. First operand 167180 states and 182066 transitions. Second operand has 4 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:26:08,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:26:08,244 INFO L93 Difference]: Finished difference Result 470992 states and 516103 transitions. [2022-12-13 21:26:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:26:08,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 0 states have call successors, (0), 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 924 [2022-12-13 21:26:08,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:26:08,572 INFO L225 Difference]: With dead ends: 470992 [2022-12-13 21:26:08,572 INFO L226 Difference]: Without dead ends: 306544 [2022-12-13 21:26:08,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:26:08,643 INFO L413 NwaCegarLoop]: 1208 mSDtfsCounter, 3174 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 9276 mSolverCounterSat, 2378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3174 SdHoareTripleChecker+Valid, 1532 SdHoareTripleChecker+Invalid, 11654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2378 IncrementalHoareTripleChecker+Valid, 9276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-12-13 21:26:08,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3174 Valid, 1532 Invalid, 11654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2378 Valid, 9276 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2022-12-13 21:26:08,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306544 states. [2022-12-13 21:26:11,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306544 to 287332. [2022-12-13 21:26:11,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287332 states, 287331 states have (on average 1.090185187118689) internal successors, (313244), 287331 states have internal predecessors, (313244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:26:11,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287332 states to 287332 states and 313244 transitions. [2022-12-13 21:26:11,727 INFO L78 Accepts]: Start accepts. Automaton has 287332 states and 313244 transitions. Word has length 924 [2022-12-13 21:26:11,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:26:11,727 INFO L495 AbstractCegarLoop]: Abstraction has 287332 states and 313244 transitions. [2022-12-13 21:26:11,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:26:11,728 INFO L276 IsEmpty]: Start isEmpty. Operand 287332 states and 313244 transitions. [2022-12-13 21:26:11,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 994 [2022-12-13 21:26:11,736 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:26:11,736 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:26:11,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 21:26:11,736 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:26:11,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:26:11,736 INFO L85 PathProgramCache]: Analyzing trace with hash 368340053, now seen corresponding path program 1 times [2022-12-13 21:26:11,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:26:11,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271913205] [2022-12-13 21:26:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:26:11,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:26:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:26:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 464 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-12-13 21:26:12,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:26:12,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271913205] [2022-12-13 21:26:12,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271913205] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:26:12,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:26:12,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:26:12,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892820497] [2022-12-13 21:26:12,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:26:12,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:26:12,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:26:12,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:26:12,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:26:12,560 INFO L87 Difference]: Start difference. First operand 287332 states and 313244 transitions. Second operand has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:26:23,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:26:23,631 INFO L93 Difference]: Finished difference Result 758939 states and 835291 transitions. [2022-12-13 21:26:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:26:23,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 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 993 [2022-12-13 21:26:23,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:26:24,170 INFO L225 Difference]: With dead ends: 758939 [2022-12-13 21:26:24,170 INFO L226 Difference]: Without dead ends: 474339 [2022-12-13 21:26:24,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:26:24,273 INFO L413 NwaCegarLoop]: 1044 mSDtfsCounter, 3125 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 7680 mSolverCounterSat, 2424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3125 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 10104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2424 IncrementalHoareTripleChecker+Valid, 7680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-12-13 21:26:24,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3125 Valid, 1244 Invalid, 10104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2424 Valid, 7680 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-12-13 21:26:24,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474339 states. [2022-12-13 21:26:27,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474339 to 392409. [2022-12-13 21:26:28,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392409 states, 392408 states have (on average 1.0869707039611833) internal successors, (426536), 392408 states have internal predecessors, (426536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:26:28,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392409 states to 392409 states and 426536 transitions. [2022-12-13 21:26:28,590 INFO L78 Accepts]: Start accepts. Automaton has 392409 states and 426536 transitions. Word has length 993 [2022-12-13 21:26:28,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:26:28,591 INFO L495 AbstractCegarLoop]: Abstraction has 392409 states and 426536 transitions. [2022-12-13 21:26:28,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:26:28,591 INFO L276 IsEmpty]: Start isEmpty. Operand 392409 states and 426536 transitions. [2022-12-13 21:26:28,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1394 [2022-12-13 21:26:28,621 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:26:28,621 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-13 21:26:28,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 21:26:28,622 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:26:28,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:26:28,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1590401808, now seen corresponding path program 1 times [2022-12-13 21:26:28,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:26:28,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018940785] [2022-12-13 21:26:28,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:26:28,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:26:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:26:29,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 333 proven. 0 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2022-12-13 21:26:29,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:26:29,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018940785] [2022-12-13 21:26:29,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018940785] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:26:29,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:26:29,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:26:29,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979330929] [2022-12-13 21:26:29,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:26:29,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:26:29,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:26:29,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:26:29,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:26:29,551 INFO L87 Difference]: Start difference. First operand 392409 states and 426536 transitions. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:26:36,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:26:36,734 INFO L93 Difference]: Finished difference Result 782092 states and 850343 transitions. [2022-12-13 21:26:36,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:26:36,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 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 1393 [2022-12-13 21:26:36,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:26:37,222 INFO L225 Difference]: With dead ends: 782092 [2022-12-13 21:26:37,222 INFO L226 Difference]: Without dead ends: 392415 [2022-12-13 21:26:37,467 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 [2022-12-13 21:26:37,468 INFO L413 NwaCegarLoop]: 2842 mSDtfsCounter, 1349 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 4403 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1349 SdHoareTripleChecker+Valid, 3031 SdHoareTripleChecker+Invalid, 4790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 4403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-12-13 21:26:37,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1349 Valid, 3031 Invalid, 4790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 4403 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-12-13 21:26:37,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392415 states. [2022-12-13 21:26:40,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392415 to 378758. [2022-12-13 21:26:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378758 states, 378757 states have (on average 1.0774929572258731) internal successors, (408108), 378757 states have internal predecessors, (408108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:26:41,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378758 states to 378758 states and 408108 transitions. [2022-12-13 21:26:41,385 INFO L78 Accepts]: Start accepts. Automaton has 378758 states and 408108 transitions. Word has length 1393 [2022-12-13 21:26:41,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:26:41,386 INFO L495 AbstractCegarLoop]: Abstraction has 378758 states and 408108 transitions. [2022-12-13 21:26:41,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:26:41,386 INFO L276 IsEmpty]: Start isEmpty. Operand 378758 states and 408108 transitions. [2022-12-13 21:26:41,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1430 [2022-12-13 21:26:41,405 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:26:41,405 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-13 21:26:41,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 21:26:41,405 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:26:41,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:26:41,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1420030255, now seen corresponding path program 1 times [2022-12-13 21:26:41,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:26:41,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521302631] [2022-12-13 21:26:41,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:26:41,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:26:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:26:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1277 backedges. 646 proven. 485 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-12-13 21:26:44,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:26:44,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521302631] [2022-12-13 21:26:44,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521302631] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:26:44,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525133028] [2022-12-13 21:26:44,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:26:44,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:26:44,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:26:44,531 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:26:44,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 21:26:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:26:45,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 1617 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 21:26:45,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:26:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1277 backedges. 406 proven. 0 refuted. 0 times theorem prover too weak. 871 trivial. 0 not checked. [2022-12-13 21:26:45,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:26:45,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525133028] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:26:45,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:26:45,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-12-13 21:26:45,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054891658] [2022-12-13 21:26:45,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:26:45,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:26:45,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:26:45,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:26:45,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:26:45,100 INFO L87 Difference]: Start difference. First operand 378758 states and 408108 transitions. Second operand has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:26:52,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:26:52,311 INFO L93 Difference]: Finished difference Result 833960 states and 902336 transitions. [2022-12-13 21:26:52,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:26:52,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 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 1429 [2022-12-13 21:26:52,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:26:52,920 INFO L225 Difference]: With dead ends: 833960 [2022-12-13 21:26:52,921 INFO L226 Difference]: Without dead ends: 453839 [2022-12-13 21:26:53,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1434 GetRequests, 1428 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:26:53,078 INFO L413 NwaCegarLoop]: 2640 mSDtfsCounter, 1572 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 3703 mSolverCounterSat, 1566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 2767 SdHoareTripleChecker+Invalid, 5269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1566 IncrementalHoareTripleChecker+Valid, 3703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-12-13 21:26:53,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1572 Valid, 2767 Invalid, 5269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1566 Valid, 3703 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-12-13 21:26:53,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453839 states. [2022-12-13 21:26:57,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453839 to 437447. [2022-12-13 21:26:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437447 states, 437446 states have (on average 1.0678438024350434) internal successors, (467124), 437446 states have internal predecessors, (467124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:26:57,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437447 states to 437447 states and 467124 transitions. [2022-12-13 21:26:57,930 INFO L78 Accepts]: Start accepts. Automaton has 437447 states and 467124 transitions. Word has length 1429 [2022-12-13 21:26:57,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:26:57,931 INFO L495 AbstractCegarLoop]: Abstraction has 437447 states and 467124 transitions. [2022-12-13 21:26:57,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:26:57,931 INFO L276 IsEmpty]: Start isEmpty. Operand 437447 states and 467124 transitions. [2022-12-13 21:26:57,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1477 [2022-12-13 21:26:57,955 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:26:57,955 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:26:57,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 21:26:58,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 21:26:58,157 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:26:58,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:26:58,159 INFO L85 PathProgramCache]: Analyzing trace with hash -524649259, now seen corresponding path program 1 times [2022-12-13 21:26:58,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:26:58,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952331895] [2022-12-13 21:26:58,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:26:58,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:26:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:26:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1810 backedges. 1585 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-12-13 21:26:59,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:26:59,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952331895] [2022-12-13 21:26:59,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952331895] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:26:59,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:26:59,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:26:59,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487979015] [2022-12-13 21:26:59,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:26:59,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:26:59,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:26:59,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:26:59,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:26:59,489 INFO L87 Difference]: Start difference. First operand 437447 states and 467124 transitions. Second operand has 3 states, 3 states have (on average 417.6666666666667) internal successors, (1253), 3 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:27:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:27:08,765 INFO L93 Difference]: Finished difference Result 933638 states and 998858 transitions. [2022-12-13 21:27:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:27:08,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 417.6666666666667) internal successors, (1253), 3 states have internal predecessors, (1253), 0 states have call successors, (0), 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 1476 [2022-12-13 21:27:08,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:27:09,464 INFO L225 Difference]: With dead ends: 933638 [2022-12-13 21:27:09,464 INFO L226 Difference]: Without dead ends: 497557 [2022-12-13 21:27:09,567 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 [2022-12-13 21:27:09,567 INFO L413 NwaCegarLoop]: 2904 mSDtfsCounter, 1085 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 4857 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 3061 SdHoareTripleChecker+Invalid, 5741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 4857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:27:09,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1085 Valid, 3061 Invalid, 5741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 4857 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-12-13 21:27:09,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497557 states. [2022-12-13 21:27:13,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497557 to 490663. [2022-12-13 21:27:13,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490663 states, 490662 states have (on average 1.0591282797526607) internal successors, (519674), 490662 states have internal predecessors, (519674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:27:14,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490663 states to 490663 states and 519674 transitions. [2022-12-13 21:27:14,652 INFO L78 Accepts]: Start accepts. Automaton has 490663 states and 519674 transitions. Word has length 1476 [2022-12-13 21:27:14,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:27:14,653 INFO L495 AbstractCegarLoop]: Abstraction has 490663 states and 519674 transitions. [2022-12-13 21:27:14,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 417.6666666666667) internal successors, (1253), 3 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:27:14,653 INFO L276 IsEmpty]: Start isEmpty. Operand 490663 states and 519674 transitions. [2022-12-13 21:27:14,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1538 [2022-12-13 21:27:14,678 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:27:14,679 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:27:14,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 21:27:14,679 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:27:14,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:27:14,679 INFO L85 PathProgramCache]: Analyzing trace with hash -841687013, now seen corresponding path program 1 times [2022-12-13 21:27:14,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:27:14,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131381394] [2022-12-13 21:27:14,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:27:14,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:27:15,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:27:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 931 proven. 485 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-12-13 21:27:18,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:27:18,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131381394] [2022-12-13 21:27:18,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131381394] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:27:18,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547725994] [2022-12-13 21:27:18,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:27:18,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:27:18,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:27:18,326 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:27:18,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 21:27:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:27:18,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 1725 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 21:27:18,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:27:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 1479 trivial. 0 not checked. [2022-12-13 21:27:18,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:27:18,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547725994] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:27:18,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:27:18,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-12-13 21:27:18,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467724629] [2022-12-13 21:27:18,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:27:18,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:27:18,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:27:18,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:27:18,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:27:18,754 INFO L87 Difference]: Start difference. First operand 490663 states and 519674 transitions. Second operand has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:27:27,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:27:27,727 INFO L93 Difference]: Finished difference Result 1105570 states and 1171602 transitions. [2022-12-13 21:27:27,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:27:27,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 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 1537 [2022-12-13 21:27:27,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:27:28,480 INFO L225 Difference]: With dead ends: 1105570 [2022-12-13 21:27:28,480 INFO L226 Difference]: Without dead ends: 617639 [2022-12-13 21:27:28,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1542 GetRequests, 1536 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:27:28,710 INFO L413 NwaCegarLoop]: 1190 mSDtfsCounter, 1630 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 4110 mSolverCounterSat, 1471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1630 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 5581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1471 IncrementalHoareTripleChecker+Valid, 4110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:27:28,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1630 Valid, 1329 Invalid, 5581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1471 Valid, 4110 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-12-13 21:27:29,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617639 states. [2022-12-13 21:27:34,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617639 to 603960. [2022-12-13 21:27:35,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603960 states, 603959 states have (on average 1.0552239473209275) internal successors, (637312), 603959 states have internal predecessors, (637312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:27:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603960 states to 603960 states and 637312 transitions. [2022-12-13 21:27:35,849 INFO L78 Accepts]: Start accepts. Automaton has 603960 states and 637312 transitions. Word has length 1537 [2022-12-13 21:27:35,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:27:35,850 INFO L495 AbstractCegarLoop]: Abstraction has 603960 states and 637312 transitions. [2022-12-13 21:27:35,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:27:35,850 INFO L276 IsEmpty]: Start isEmpty. Operand 603960 states and 637312 transitions. [2022-12-13 21:27:35,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1563 [2022-12-13 21:27:35,870 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:27:35,871 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:27:35,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 21:27:36,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:27:36,073 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:27:36,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:27:36,074 INFO L85 PathProgramCache]: Analyzing trace with hash -612856778, now seen corresponding path program 1 times [2022-12-13 21:27:36,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:27:36,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878267832] [2022-12-13 21:27:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:27:36,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:27:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:27:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1613 backedges. 981 proven. 485 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-12-13 21:27:39,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:27:39,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878267832] [2022-12-13 21:27:39,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878267832] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:27:39,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665223280] [2022-12-13 21:27:39,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:27:39,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:27:39,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:27:39,701 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:27:39,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 21:27:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:27:40,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 1751 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 21:27:40,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:27:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1613 backedges. 1466 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-12-13 21:27:41,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:27:41,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665223280] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:27:41,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:27:41,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-12-13 21:27:41,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128695889] [2022-12-13 21:27:41,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:27:41,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:27:41,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:27:41,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:27:41,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:27:41,674 INFO L87 Difference]: Start difference. First operand 603960 states and 637312 transitions. Second operand has 4 states, 4 states have (on average 358.0) internal successors, (1432), 3 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:27:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:27:52,154 INFO L93 Difference]: Finished difference Result 1212084 states and 1278913 transitions. [2022-12-13 21:27:52,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:27:52,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 358.0) internal successors, (1432), 3 states have internal predecessors, (1432), 0 states have call successors, (0), 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 1562 [2022-12-13 21:27:52,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:27:52,903 INFO L225 Difference]: With dead ends: 1212084 [2022-12-13 21:27:52,903 INFO L226 Difference]: Without dead ends: 610856 [2022-12-13 21:27:53,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1567 GetRequests, 1560 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:27:53,356 INFO L413 NwaCegarLoop]: 689 mSDtfsCounter, 2110 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 7675 mSolverCounterSat, 1403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2110 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 9078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1403 IncrementalHoareTripleChecker+Valid, 7675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-12-13 21:27:53,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2110 Valid, 888 Invalid, 9078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1403 Valid, 7675 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-12-13 21:27:53,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610856 states. [2022-12-13 21:27:58,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610856 to 602595. [2022-12-13 21:27:58,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602595 states, 602594 states have (on average 1.0548113655296933) internal successors, (635623), 602594 states have internal predecessors, (635623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:27:59,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602595 states to 602595 states and 635623 transitions. [2022-12-13 21:27:59,599 INFO L78 Accepts]: Start accepts. Automaton has 602595 states and 635623 transitions. Word has length 1562 [2022-12-13 21:27:59,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:27:59,599 INFO L495 AbstractCegarLoop]: Abstraction has 602595 states and 635623 transitions. [2022-12-13 21:27:59,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 358.0) internal successors, (1432), 3 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:27:59,600 INFO L276 IsEmpty]: Start isEmpty. Operand 602595 states and 635623 transitions. [2022-12-13 21:27:59,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1705 [2022-12-13 21:27:59,626 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:27:59,627 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-13 21:27:59,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 21:27:59,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:27:59,829 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:27:59,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:27:59,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1778296589, now seen corresponding path program 1 times [2022-12-13 21:27:59,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:27:59,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087011551] [2022-12-13 21:27:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:27:59,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:28:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:28:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 1186 proven. 485 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2022-12-13 21:28:04,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:28:04,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087011551] [2022-12-13 21:28:04,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087011551] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:28:04,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050316937] [2022-12-13 21:28:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:28:04,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:28:04,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:28:04,326 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:28:04,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 21:28:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:28:04,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 1949 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 21:28:04,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:28:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 1137 proven. 0 refuted. 0 times theorem prover too weak. 1269 trivial. 0 not checked. [2022-12-13 21:28:04,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:28:04,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050316937] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:28:04,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:28:04,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-12-13 21:28:04,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712446650] [2022-12-13 21:28:04,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:28:04,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:28:04,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:28:04,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:28:04,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:28:04,808 INFO L87 Difference]: Start difference. First operand 602595 states and 635623 transitions. Second operand has 3 states, 3 states have (on average 269.3333333333333) internal successors, (808), 3 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:28:13,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:28:13,601 INFO L93 Difference]: Finished difference Result 1240672 states and 1308242 transitions. [2022-12-13 21:28:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:28:13,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 269.3333333333333) internal successors, (808), 3 states have internal predecessors, (808), 0 states have call successors, (0), 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 1704 [2022-12-13 21:28:13,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:28:14,364 INFO L225 Difference]: With dead ends: 1240672 [2022-12-13 21:28:14,364 INFO L226 Difference]: Without dead ends: 640809 [2022-12-13 21:28:14,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1709 GetRequests, 1703 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:28:14,557 INFO L413 NwaCegarLoop]: 2897 mSDtfsCounter, 1395 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 4473 mSolverCounterSat, 543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1395 SdHoareTripleChecker+Valid, 3141 SdHoareTripleChecker+Invalid, 5016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 543 IncrementalHoareTripleChecker+Valid, 4473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-12-13 21:28:14,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1395 Valid, 3141 Invalid, 5016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [543 Valid, 4473 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-12-13 21:28:15,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640809 states. [2022-12-13 21:28:20,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640809 to 627155. [2022-12-13 21:28:20,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627155 states, 627154 states have (on average 1.052526173794634) internal successors, (660096), 627154 states have internal predecessors, (660096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:28:21,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627155 states to 627155 states and 660096 transitions. [2022-12-13 21:28:21,125 INFO L78 Accepts]: Start accepts. Automaton has 627155 states and 660096 transitions. Word has length 1704 [2022-12-13 21:28:21,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:28:21,126 INFO L495 AbstractCegarLoop]: Abstraction has 627155 states and 660096 transitions. [2022-12-13 21:28:21,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.3333333333333) internal successors, (808), 3 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:28:21,126 INFO L276 IsEmpty]: Start isEmpty. Operand 627155 states and 660096 transitions. [2022-12-13 21:28:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1732 [2022-12-13 21:28:21,154 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:28:21,154 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-13 21:28:21,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 21:28:21,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:28:21,356 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:28:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:28:21,358 INFO L85 PathProgramCache]: Analyzing trace with hash -258260941, now seen corresponding path program 1 times [2022-12-13 21:28:21,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:28:21,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640049664] [2022-12-13 21:28:21,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:28:21,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:28:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:28:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2224 backedges. 1248 proven. 485 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-12-13 21:28:25,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:28:25,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640049664] [2022-12-13 21:28:25,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640049664] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:28:25,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023912042] [2022-12-13 21:28:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:28:25,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:28:25,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:28:26,000 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:28:26,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 21:28:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:28:26,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 1955 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 21:28:26,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:28:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2224 backedges. 1733 proven. 0 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-12-13 21:28:28,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:28:28,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023912042] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:28:28,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:28:28,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-12-13 21:28:28,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677243644] [2022-12-13 21:28:28,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:28:28,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:28:28,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:28:28,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:28:28,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:28:28,088 INFO L87 Difference]: Start difference. First operand 627155 states and 660096 transitions. Second operand has 4 states, 4 states have (on average 349.75) internal successors, (1399), 3 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:28:38,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:28:38,539 INFO L93 Difference]: Finished difference Result 1285713 states and 1353892 transitions. [2022-12-13 21:28:38,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:28:38,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 349.75) internal successors, (1399), 3 states have internal predecessors, (1399), 0 states have call successors, (0), 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 1731 [2022-12-13 21:28:38,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:28:39,267 INFO L225 Difference]: With dead ends: 1285713 [2022-12-13 21:28:39,268 INFO L226 Difference]: Without dead ends: 659921 [2022-12-13 21:28:39,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1736 GetRequests, 1729 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:28:39,624 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 2097 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 7053 mSolverCounterSat, 1750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2097 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 8803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1750 IncrementalHoareTripleChecker+Valid, 7053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-12-13 21:28:39,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2097 Valid, 840 Invalid, 8803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1750 Valid, 7053 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-12-13 21:28:40,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659921 states. [2022-12-13 21:28:45,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659921 to 650362. [2022-12-13 21:28:45,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650362 states, 650361 states have (on average 1.0306798839413802) internal successors, (670314), 650361 states have internal predecessors, (670314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:28:46,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650362 states to 650362 states and 670314 transitions. [2022-12-13 21:28:46,563 INFO L78 Accepts]: Start accepts. Automaton has 650362 states and 670314 transitions. Word has length 1731 [2022-12-13 21:28:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:28:46,564 INFO L495 AbstractCegarLoop]: Abstraction has 650362 states and 670314 transitions. [2022-12-13 21:28:46,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 349.75) internal successors, (1399), 3 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:28:46,564 INFO L276 IsEmpty]: Start isEmpty. Operand 650362 states and 670314 transitions. [2022-12-13 21:28:46,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2006 [2022-12-13 21:28:46,597 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:28:46,598 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:28:46,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 21:28:46,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e82736-9f72-4c01-9ee3-46fb3aa625c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 21:28:46,799 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:28:46,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:28:46,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1642725138, now seen corresponding path program 1 times [2022-12-13 21:28:46,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:28:46,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314486216] [2022-12-13 21:28:46,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:28:46,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:28:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:28:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3781 backedges. 1861 proven. 0 refuted. 0 times theorem prover too weak. 1920 trivial. 0 not checked. [2022-12-13 21:28:48,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:28:48,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314486216] [2022-12-13 21:28:48,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314486216] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:28:48,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:28:48,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:28:48,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521100672] [2022-12-13 21:28:48,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:28:48,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:28:48,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:28:48,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:28:48,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:28:48,289 INFO L87 Difference]: Start difference. First operand 650362 states and 670314 transitions. Second operand has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:28:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:28:57,488 INFO L93 Difference]: Finished difference Result 1356681 states and 1399960 transitions. [2022-12-13 21:28:57,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:28:57,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 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 2005 [2022-12-13 21:28:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:28:58,298 INFO L225 Difference]: With dead ends: 1356681 [2022-12-13 21:28:58,298 INFO L226 Difference]: Without dead ends: 707686 [2022-12-13 21:28:58,484 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 [2022-12-13 21:28:58,484 INFO L413 NwaCegarLoop]: 2367 mSDtfsCounter, 1182 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 3972 mSolverCounterSat, 686 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 2573 SdHoareTripleChecker+Invalid, 4658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 3972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-12-13 21:28:58,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1182 Valid, 2573 Invalid, 4658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [686 Valid, 3972 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-12-13 21:28:59,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707686 states. [2022-12-13 21:29:04,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707686 to 695394. [2022-12-13 21:29:05,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695394 states, 695393 states have (on average 1.0274923676252135) internal successors, (714511), 695393 states have internal predecessors, (714511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:29:05,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695394 states to 695394 states and 714511 transitions. [2022-12-13 21:29:05,919 INFO L78 Accepts]: Start accepts. Automaton has 695394 states and 714511 transitions. Word has length 2005 [2022-12-13 21:29:05,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:29:05,920 INFO L495 AbstractCegarLoop]: Abstraction has 695394 states and 714511 transitions. [2022-12-13 21:29:05,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:29:05,920 INFO L276 IsEmpty]: Start isEmpty. Operand 695394 states and 714511 transitions. [2022-12-13 21:29:05,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2044 [2022-12-13 21:29:05,951 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:29:05,951 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-13 21:29:05,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 21:29:05,952 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:29:05,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:29:05,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1565571978, now seen corresponding path program 1 times [2022-12-13 21:29:05,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:29:05,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792223654] [2022-12-13 21:29:05,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:29:05,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:29:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:29:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4013 backedges. 751 proven. 0 refuted. 0 times theorem prover too weak. 3262 trivial. 0 not checked. [2022-12-13 21:29:07,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:29:07,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792223654] [2022-12-13 21:29:07,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792223654] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:29:07,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:29:07,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:29:07,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854930351] [2022-12-13 21:29:07,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:29:07,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:29:07,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:29:07,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:29:07,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:29:07,814 INFO L87 Difference]: Start difference. First operand 695394 states and 714511 transitions. Second operand has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:29:16,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:29:16,352 INFO L93 Difference]: Finished difference Result 1430409 states and 1469894 transitions. [2022-12-13 21:29:16,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:29:16,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2043 [2022-12-13 21:29:16,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:29:17,356 INFO L225 Difference]: With dead ends: 1430409 [2022-12-13 21:29:17,356 INFO L226 Difference]: Without dead ends: 736382 [2022-12-13 21:29:17,529 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 [2022-12-13 21:29:17,529 INFO L413 NwaCegarLoop]: 2598 mSDtfsCounter, 1295 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 4061 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1295 SdHoareTripleChecker+Valid, 2804 SdHoareTripleChecker+Invalid, 4454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 4061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-12-13 21:29:17,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1295 Valid, 2804 Invalid, 4454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 4061 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-12-13 21:29:18,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736382 states. [2022-12-13 21:29:24,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736382 to 736362. [2022-12-13 21:29:24,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736362 states, 736361 states have (on average 1.0259723152095237) internal successors, (755486), 736361 states have internal predecessors, (755486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:29:25,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736362 states to 736362 states and 755486 transitions. [2022-12-13 21:29:25,185 INFO L78 Accepts]: Start accepts. Automaton has 736362 states and 755486 transitions. Word has length 2043 [2022-12-13 21:29:25,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:29:25,186 INFO L495 AbstractCegarLoop]: Abstraction has 736362 states and 755486 transitions. [2022-12-13 21:29:25,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:29:25,186 INFO L276 IsEmpty]: Start isEmpty. Operand 736362 states and 755486 transitions. [2022-12-13 21:29:25,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2054 [2022-12-13 21:29:25,218 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:29:25,219 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-13 21:29:25,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 21:29:25,219 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:29:25,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:29:25,219 INFO L85 PathProgramCache]: Analyzing trace with hash 385196266, now seen corresponding path program 1 times [2022-12-13 21:29:25,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:29:25,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457801296] [2022-12-13 21:29:25,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:29:25,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:29:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:29:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3073 backedges. 540 proven. 0 refuted. 0 times theorem prover too weak. 2533 trivial. 0 not checked. [2022-12-13 21:29:28,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:29:28,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457801296] [2022-12-13 21:29:28,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457801296] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:29:28,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:29:28,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:29:28,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584319610] [2022-12-13 21:29:28,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:29:28,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:29:28,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:29:28,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:29:28,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:29:28,468 INFO L87 Difference]: Start difference. First operand 736362 states and 755486 transitions. Second operand has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)