./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/eureka_05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/eureka_05.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS --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 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab --- 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-4e7fbc6 [2022-11-23 03:38:47,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:38:47,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:38:47,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:38:47,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:38:47,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:38:47,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:38:47,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:38:47,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:38:47,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:38:47,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:38:47,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:38:47,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:38:47,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:38:47,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:38:47,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:38:47,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:38:47,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:38:47,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:38:47,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:38:47,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:38:47,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:38:47,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:38:47,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:38:47,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:38:47,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:38:47,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:38:47,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:38:47,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:38:47,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:38:47,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:38:47,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:38:47,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:38:47,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:38:47,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:38:47,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:38:47,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:38:47,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:38:47,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:38:47,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:38:47,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:38:47,515 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 03:38:47,557 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:38:47,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:38:47,559 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:38:47,559 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:38:47,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:38:47,560 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:38:47,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:38:47,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:38:47,561 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:38:47,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:38:47,563 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:38:47,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:38:47,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:38:47,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:38:47,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 03:38:47,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:38:47,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 03:38:47,564 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:38:47,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 03:38:47,565 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:38:47,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 03:38:47,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:38:47,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:38:47,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:38:47,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:38:47,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:38:47,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:38:47,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 03:38:47,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:38:47,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:38:47,568 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:38:47,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 03:38:47,568 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:38:47,568 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:38:47,569 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_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab [2022-11-23 03:38:47,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:38:47,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:38:47,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:38:47,925 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:38:47,926 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:38:47,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/loops/eureka_05.i [2022-11-23 03:38:50,965 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:38:51,187 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:38:51,188 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/sv-benchmarks/c/loops/eureka_05.i [2022-11-23 03:38:51,195 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/data/d8141c29f/fb0aab81ce604f599af3c19b7983ac6e/FLAG76dfcf399 [2022-11-23 03:38:51,209 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/data/d8141c29f/fb0aab81ce604f599af3c19b7983ac6e [2022-11-23 03:38:51,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:38:51,213 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:38:51,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:38:51,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:38:51,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:38:51,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:38:51" (1/1) ... [2022-11-23 03:38:51,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@404486e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:51, skipping insertion in model container [2022-11-23 03:38:51,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:38:51" (1/1) ... [2022-11-23 03:38:51,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:38:51,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:38:51,413 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_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/sv-benchmarks/c/loops/eureka_05.i[810,823] [2022-11-23 03:38:51,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:38:51,480 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:38:51,492 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_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/sv-benchmarks/c/loops/eureka_05.i[810,823] [2022-11-23 03:38:51,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:38:51,514 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:38:51,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:51 WrapperNode [2022-11-23 03:38:51,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:38:51,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:38:51,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:38:51,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:38:51,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:51" (1/1) ... [2022-11-23 03:38:51,530 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:51" (1/1) ... [2022-11-23 03:38:51,550 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2022-11-23 03:38:51,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:38:51,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:38:51,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:38:51,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:38:51,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:51" (1/1) ... [2022-11-23 03:38:51,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:51" (1/1) ... [2022-11-23 03:38:51,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:51" (1/1) ... [2022-11-23 03:38:51,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:51" (1/1) ... [2022-11-23 03:38:51,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:51" (1/1) ... [2022-11-23 03:38:51,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:51" (1/1) ... [2022-11-23 03:38:51,575 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:51" (1/1) ... [2022-11-23 03:38:51,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:51" (1/1) ... [2022-11-23 03:38:51,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:38:51,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:38:51,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:38:51,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:38:51,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:51" (1/1) ... [2022-11-23 03:38:51,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:38:51,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:38:51,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:38:51,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:38:51,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:38:51,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:38:51,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:38:51,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:38:51,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:38:51,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:38:51,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 03:38:51,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:38:51,739 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:38:51,741 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:38:51,900 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:38:51,906 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:38:51,907 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 03:38:51,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:38:51 BoogieIcfgContainer [2022-11-23 03:38:51,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:38:51,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:38:51,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:38:51,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:38:51,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:38:51" (1/3) ... [2022-11-23 03:38:51,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c947f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:38:51, skipping insertion in model container [2022-11-23 03:38:51,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:51" (2/3) ... [2022-11-23 03:38:51,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c947f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:38:51, skipping insertion in model container [2022-11-23 03:38:51,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:38:51" (3/3) ... [2022-11-23 03:38:51,920 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_05.i [2022-11-23 03:38:51,941 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:38:51,942 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 03:38:52,021 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:38:52,028 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;@293866ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:38:52,029 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 03:38:52,033 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:52,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 03:38:52,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:38:52,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:38:52,041 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:38:52,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:38:52,047 INFO L85 PathProgramCache]: Analyzing trace with hash -2015864939, now seen corresponding path program 1 times [2022-11-23 03:38:52,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:38:52,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670829433] [2022-11-23 03:38:52,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:38:52,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:38:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:38:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:38:52,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:38:52,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670829433] [2022-11-23 03:38:52,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670829433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:38:52,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:38:52,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:38:52,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905456588] [2022-11-23 03:38:52,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:38:52,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:38:52,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:38:52,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:38:52,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:38:52,323 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:52,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:38:52,361 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2022-11-23 03:38:52,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:38:52,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-23 03:38:52,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:38:52,372 INFO L225 Difference]: With dead ends: 42 [2022-11-23 03:38:52,373 INFO L226 Difference]: Without dead ends: 20 [2022-11-23 03:38:52,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:38:52,382 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:38:52,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 39 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:38:52,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-23 03:38:52,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-11-23 03:38:52,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-23 03:38:52,428 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2022-11-23 03:38:52,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:38:52,429 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-23 03:38:52,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:52,429 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-23 03:38:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 03:38:52,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:38:52,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:38:52,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:38:52,431 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:38:52,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:38:52,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1565230291, now seen corresponding path program 1 times [2022-11-23 03:38:52,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:38:52,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321497564] [2022-11-23 03:38:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:38:52,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:38:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:38:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:38:52,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:38:52,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321497564] [2022-11-23 03:38:52,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321497564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:38:52,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655730778] [2022-11-23 03:38:52,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:38:52,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:38:52,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:38:52,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:38:52,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:38:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:38:52,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 03:38:52,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:38:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:38:52,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:38:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:38:52,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655730778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:38:52,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:38:52,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-11-23 03:38:52,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197092487] [2022-11-23 03:38:52,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:38:52,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:38:52,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:38:52,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:38:52,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:38:52,750 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:52,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:38:52,811 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-11-23 03:38:52,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:38:52,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 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 11 [2022-11-23 03:38:52,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:38:52,816 INFO L225 Difference]: With dead ends: 45 [2022-11-23 03:38:52,816 INFO L226 Difference]: Without dead ends: 31 [2022-11-23 03:38:52,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:38:52,819 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:38:52,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 56 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:38:52,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-23 03:38:52,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2022-11-23 03:38:52,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:52,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-23 03:38:52,840 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2022-11-23 03:38:52,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:38:52,841 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-23 03:38:52,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:52,842 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-23 03:38:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 03:38:52,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:38:52,843 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:38:52,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:38:53,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:38:53,047 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:38:53,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:38:53,048 INFO L85 PathProgramCache]: Analyzing trace with hash -7962739, now seen corresponding path program 2 times [2022-11-23 03:38:53,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:38:53,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909066620] [2022-11-23 03:38:53,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:38:53,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:38:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:38:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 03:38:53,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:38:53,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909066620] [2022-11-23 03:38:53,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909066620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:38:53,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:38:53,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:38:53,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635832069] [2022-11-23 03:38:53,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:38:53,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:38:53,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:38:53,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:38:53,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:38:53,220 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:53,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:38:53,249 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-11-23 03:38:53,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:38:53,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-23 03:38:53,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:38:53,252 INFO L225 Difference]: With dead ends: 38 [2022-11-23 03:38:53,252 INFO L226 Difference]: Without dead ends: 31 [2022-11-23 03:38:53,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:38:53,254 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:38:53,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:38:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-23 03:38:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2022-11-23 03:38:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-23 03:38:53,266 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-11-23 03:38:53,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:38:53,267 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-23 03:38:53,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:53,268 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-23 03:38:53,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 03:38:53,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:38:53,270 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:38:53,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 03:38:53,271 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:38:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:38:53,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1148715813, now seen corresponding path program 1 times [2022-11-23 03:38:53,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:38:53,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074576198] [2022-11-23 03:38:53,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:38:53,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:38:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:38:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 03:38:53,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:38:53,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074576198] [2022-11-23 03:38:53,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074576198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:38:53,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:38:53,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:38:53,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763813180] [2022-11-23 03:38:53,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:38:53,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:38:53,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:38:53,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:38:53,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:38:53,473 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:53,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:38:53,589 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-11-23 03:38:53,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:38:53,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-23 03:38:53,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:38:53,591 INFO L225 Difference]: With dead ends: 47 [2022-11-23 03:38:53,591 INFO L226 Difference]: Without dead ends: 34 [2022-11-23 03:38:53,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:38:53,593 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:38:53,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 40 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:38:53,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-23 03:38:53,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2022-11-23 03:38:53,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:53,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-23 03:38:53,605 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2022-11-23 03:38:53,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:38:53,605 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-23 03:38:53,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:53,606 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-23 03:38:53,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 03:38:53,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:38:53,607 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:38:53,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 03:38:53,607 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:38:53,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:38:53,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1025080129, now seen corresponding path program 1 times [2022-11-23 03:38:53,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:38:53,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051514770] [2022-11-23 03:38:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:38:53,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:38:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:38:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 03:38:53,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:38:53,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051514770] [2022-11-23 03:38:53,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051514770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:38:53,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923949208] [2022-11-23 03:38:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:38:53,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:38:53,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:38:53,823 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:38:53,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:38:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:38:53,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:38:53,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:38:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:38:54,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:38:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:38:54,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923949208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:38:54,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:38:54,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2022-11-23 03:38:54,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262500748] [2022-11-23 03:38:54,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:38:54,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:38:54,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:38:54,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:38:54,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:38:54,126 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:54,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:38:54,311 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-11-23 03:38:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 03:38:54,311 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 24 [2022-11-23 03:38:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:38:54,315 INFO L225 Difference]: With dead ends: 80 [2022-11-23 03:38:54,315 INFO L226 Difference]: Without dead ends: 64 [2022-11-23 03:38:54,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-23 03:38:54,319 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 77 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:38:54,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 109 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:38:54,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-23 03:38:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 35. [2022-11-23 03:38:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:54,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-11-23 03:38:54,342 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2022-11-23 03:38:54,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:38:54,342 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-11-23 03:38:54,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:54,343 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-11-23 03:38:54,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 03:38:54,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:38:54,345 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:38:54,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:38:54,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:38:54,551 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:38:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:38:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash -2070168231, now seen corresponding path program 2 times [2022-11-23 03:38:54,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:38:54,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666170026] [2022-11-23 03:38:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:38:54,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:38:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:38:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 03:38:54,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:38:54,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666170026] [2022-11-23 03:38:54,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666170026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:38:54,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120134660] [2022-11-23 03:38:54,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:38:54,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:38:54,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:38:54,692 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:38:54,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 03:38:54,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:38:54,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:38:54,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 03:38:54,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:38:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 03:38:54,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:38:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 03:38:54,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120134660] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:38:54,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:38:54,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-11-23 03:38:54,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354532999] [2022-11-23 03:38:54,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:38:54,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 03:38:54,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:38:54,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 03:38:54,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:38:54,975 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:55,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:38:55,255 INFO L93 Difference]: Finished difference Result 82 states and 110 transitions. [2022-11-23 03:38:55,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 03:38:55,255 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-23 03:38:55,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:38:55,259 INFO L225 Difference]: With dead ends: 82 [2022-11-23 03:38:55,259 INFO L226 Difference]: Without dead ends: 66 [2022-11-23 03:38:55,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2022-11-23 03:38:55,262 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 200 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:38:55,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 76 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:38:55,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-23 03:38:55,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2022-11-23 03:38:55,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.25) internal successors, (75), 60 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2022-11-23 03:38:55,289 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 30 [2022-11-23 03:38:55,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:38:55,289 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2022-11-23 03:38:55,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:55,290 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2022-11-23 03:38:55,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-23 03:38:55,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:38:55,294 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:38:55,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 03:38:55,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 03:38:55,501 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:38:55,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:38:55,501 INFO L85 PathProgramCache]: Analyzing trace with hash 271285953, now seen corresponding path program 3 times [2022-11-23 03:38:55,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:38:55,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135877053] [2022-11-23 03:38:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:38:55,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:38:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:38:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-23 03:38:55,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:38:55,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135877053] [2022-11-23 03:38:55,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135877053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:38:55,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307061275] [2022-11-23 03:38:55,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:38:55,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:38:55,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:38:55,730 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:38:55,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 03:38:55,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 03:38:55,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:38:55,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 03:38:55,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:38:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 64 proven. 3 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-23 03:38:55,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:38:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 63 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-23 03:38:55,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307061275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:38:55,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:38:55,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 12 [2022-11-23 03:38:55,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295147674] [2022-11-23 03:38:55,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:38:56,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 03:38:56,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:38:56,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 03:38:56,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:38:56,004 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:56,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:38:56,272 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2022-11-23 03:38:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 03:38:56,272 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-23 03:38:56,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:38:56,273 INFO L225 Difference]: With dead ends: 79 [2022-11-23 03:38:56,273 INFO L226 Difference]: Without dead ends: 72 [2022-11-23 03:38:56,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2022-11-23 03:38:56,274 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 132 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:38:56,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 56 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:38:56,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-23 03:38:56,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-11-23 03:38:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:56,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2022-11-23 03:38:56,287 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 58 [2022-11-23 03:38:56,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:38:56,287 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2022-11-23 03:38:56,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:56,288 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2022-11-23 03:38:56,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-23 03:38:56,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:38:56,288 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:38:56,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 03:38:56,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:38:56,495 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:38:56,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:38:56,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1550484977, now seen corresponding path program 4 times [2022-11-23 03:38:56,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:38:56,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388592104] [2022-11-23 03:38:56,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:38:56,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:38:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:38:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 33 proven. 123 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-23 03:38:56,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:38:56,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388592104] [2022-11-23 03:38:56,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388592104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:38:56,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939016965] [2022-11-23 03:38:56,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:38:56,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:38:56,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:38:56,778 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:38:56,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 03:38:56,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:38:56,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:38:56,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 03:38:56,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:38:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 48 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 03:38:57,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:38:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 48 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 03:38:57,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939016965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:38:57,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:38:57,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 13 [2022-11-23 03:38:57,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219667241] [2022-11-23 03:38:57,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:38:57,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 03:38:57,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:38:57,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 03:38:57,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:38:57,216 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:57,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:38:57,656 INFO L93 Difference]: Finished difference Result 137 states and 179 transitions. [2022-11-23 03:38:57,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 03:38:57,656 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-23 03:38:57,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:38:57,658 INFO L225 Difference]: With dead ends: 137 [2022-11-23 03:38:57,658 INFO L226 Difference]: Without dead ends: 113 [2022-11-23 03:38:57,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 117 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 03:38:57,661 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 128 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:38:57,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 111 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:38:57,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-23 03:38:57,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2022-11-23 03:38:57,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.2980769230769231) internal successors, (135), 104 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2022-11-23 03:38:57,694 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 66 [2022-11-23 03:38:57,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:38:57,694 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2022-11-23 03:38:57,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:38:57,695 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2022-11-23 03:38:57,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-23 03:38:57,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:38:57,698 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:38:57,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 03:38:57,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:38:57,907 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:38:57,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:38:57,907 INFO L85 PathProgramCache]: Analyzing trace with hash 96032675, now seen corresponding path program 5 times [2022-11-23 03:38:57,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:38:57,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121366450] [2022-11-23 03:38:57,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:38:57,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:38:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:38:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-11-23 03:38:58,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:38:58,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121366450] [2022-11-23 03:38:58,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121366450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:38:58,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911412874] [2022-11-23 03:38:58,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 03:38:58,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:38:58,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:38:58,799 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:38:58,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 03:38:58,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-23 03:38:58,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:38:58,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-23 03:38:58,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:38:59,376 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:38:59,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 44 [2022-11-23 03:38:59,649 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:38:59,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 17 [2022-11-23 03:38:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 158 proven. 43 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-23 03:38:59,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:39:01,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 125 [2022-11-23 03:39:01,276 INFO L321 Elim1Store]: treesize reduction 5, result has 95.9 percent of original size [2022-11-23 03:39:01,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 233 treesize of output 274 [2022-11-23 03:39:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 163 proven. 28 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-23 03:39:02,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911412874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:39:02,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:39:02,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 20, 18] total 42 [2022-11-23 03:39:02,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423484409] [2022-11-23 03:39:02,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:39:02,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-23 03:39:02,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:39:02,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-23 03:39:02,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1560, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 03:39:02,717 INFO L87 Difference]: Start difference. First operand 105 states and 135 transitions. Second operand has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:39:36,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:39:37,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:39:37,050 INFO L93 Difference]: Finished difference Result 511 states and 684 transitions. [2022-11-23 03:39:37,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-11-23 03:39:37,051 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-23 03:39:37,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:39:37,054 INFO L225 Difference]: With dead ends: 511 [2022-11-23 03:39:37,054 INFO L226 Difference]: Without dead ends: 423 [2022-11-23 03:39:37,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12007 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=3865, Invalid=32806, Unknown=1, NotChecked=0, Total=36672 [2022-11-23 03:39:37,066 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 499 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 176 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-23 03:39:37,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 252 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1283 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-11-23 03:39:37,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-11-23 03:39:37,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 269. [2022-11-23 03:39:37,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.3507462686567164) internal successors, (362), 268 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:39:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 362 transitions. [2022-11-23 03:39:37,116 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 362 transitions. Word has length 69 [2022-11-23 03:39:37,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:39:37,116 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 362 transitions. [2022-11-23 03:39:37,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:39:37,116 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 362 transitions. [2022-11-23 03:39:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-23 03:39:37,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:39:37,118 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:39:37,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 03:39:37,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 03:39:37,325 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:39:37,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:39:37,326 INFO L85 PathProgramCache]: Analyzing trace with hash 962635175, now seen corresponding path program 1 times [2022-11-23 03:39:37,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:39:37,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914684559] [2022-11-23 03:39:37,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:39:37,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:39:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:39:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 115 proven. 101 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 03:39:40,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:39:40,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914684559] [2022-11-23 03:39:40,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914684559] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:39:40,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523391042] [2022-11-23 03:39:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:39:40,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:39:40,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:39:40,221 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:39:40,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 03:39:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:39:40,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-23 03:39:40,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:39:41,351 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:39:41,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 44 [2022-11-23 03:39:41,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:39:41,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:39:41,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:39:41,711 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:39:41,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 53 [2022-11-23 03:39:41,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:39:41,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2022-11-23 03:39:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 55 proven. 190 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 03:39:41,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:39:43,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2022-11-23 03:39:43,357 INFO L321 Elim1Store]: treesize reduction 5, result has 94.6 percent of original size [2022-11-23 03:39:43,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 134 treesize of output 175 [2022-11-23 03:39:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 148 proven. 53 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-23 03:39:43,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523391042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:39:43,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:39:43,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 16] total 60 [2022-11-23 03:39:43,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672656388] [2022-11-23 03:39:43,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:39:43,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-23 03:39:43,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:39:43,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-23 03:39:43,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=3294, Unknown=0, NotChecked=0, Total=3540 [2022-11-23 03:39:43,845 INFO L87 Difference]: Start difference. First operand 269 states and 362 transitions. Second operand has 60 states, 60 states have (on average 2.4166666666666665) internal successors, (145), 60 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:40:00,013 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse8 (* |c_ULTIMATE.start_SelectionSort_~lh~0#1| 4))) (let ((.cse4 (select |c_#memory_int| |c_~#array~0.base|)) (.cse5 (+ .cse8 |c_~#array~0.offset|)) (.cse9 (* |c_ULTIMATE.start_SelectionSort_~rh~0#1| 4)) (.cse10 (* |c_ULTIMATE.start_SelectionSort_~i~0#1| 4))) (let ((.cse6 (+ |c_~#array~0.offset| .cse10)) (.cse2 (+ .cse8 |c_~#array~0.offset| 4)) (.cse3 (+ .cse8 |c_~#array~0.offset| 12)) (.cse7 (+ .cse9 |c_~#array~0.offset|)) (.cse0 (select .cse4 .cse5))) (and (= |c_~#array~0.offset| 0) (forall ((v_ArrVal_305 Int) (v_ArrVal_304 Int)) (or (< v_ArrVal_304 .cse0) (let ((.cse1 (store (store .cse4 .cse5 v_ArrVal_305) .cse6 v_ArrVal_304))) (< (select .cse1 .cse2) (+ (select .cse1 .cse3) 1))))) (< (select .cse4 .cse7) (+ (select .cse4 .cse6) 1)) (or (and (= .cse8 .cse9) (= (+ .cse8 4) .cse10)) (= .cse9 .cse10)) (forall ((v_ArrVal_305 Int) (v_ArrVal_304 Int)) (or (let ((.cse11 (store (store .cse4 .cse5 v_ArrVal_305) .cse7 v_ArrVal_304))) (< (select .cse11 .cse2) (+ (select .cse11 .cse3) 1))) (< v_ArrVal_304 .cse0))))))) is different from false [2022-11-23 03:40:02,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:40:04,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:40:06,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:40:08,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:40:10,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:40:46,597 WARN L233 SmtUtils]: Spent 34.28s on a formula simplification. DAG size of input: 82 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:40:48,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:40:50,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:40:52,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:40:54,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:40:57,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:41:04,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:41:06,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:41:09,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:41:21,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:41:24,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:41:27,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:43:03,032 WARN L233 SmtUtils]: Spent 34.61s on a formula simplification. DAG size of input: 55 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:43:07,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:43:12,036 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse8 (* |c_ULTIMATE.start_SelectionSort_~lh~0#1| 4))) (let ((.cse4 (select |c_#memory_int| |c_~#array~0.base|)) (.cse5 (+ .cse8 |c_~#array~0.offset|)) (.cse9 (* |c_ULTIMATE.start_SelectionSort_~rh~0#1| 4)) (.cse10 (* |c_ULTIMATE.start_SelectionSort_~i~0#1| 4))) (let ((.cse6 (+ |c_~#array~0.offset| .cse10)) (.cse2 (+ .cse8 |c_~#array~0.offset| 4)) (.cse3 (+ .cse8 |c_~#array~0.offset| 12)) (.cse7 (+ .cse9 |c_~#array~0.offset|)) (.cse0 (select .cse4 .cse5))) (and (forall ((v_ArrVal_305 Int) (v_ArrVal_304 Int)) (or (< v_ArrVal_304 .cse0) (let ((.cse1 (store (store .cse4 .cse5 v_ArrVal_305) .cse6 v_ArrVal_304))) (< (select .cse1 .cse2) (+ (select .cse1 .cse3) 1))))) (< (select .cse4 .cse7) (+ (select .cse4 .cse6) 1)) (or (and (= .cse8 .cse9) (= (+ .cse8 4) .cse10)) (= .cse9 .cse10)) (forall ((v_ArrVal_305 Int) (v_ArrVal_304 Int)) (or (let ((.cse11 (store (store .cse4 .cse5 v_ArrVal_305) .cse7 v_ArrVal_304))) (< (select .cse11 .cse2) (+ (select .cse11 .cse3) 1))) (< v_ArrVal_304 .cse0))))))) is different from false [2022-11-23 03:43:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:43:12,292 INFO L93 Difference]: Finished difference Result 1002 states and 1371 transitions. [2022-11-23 03:43:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-11-23 03:43:12,293 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.4166666666666665) internal successors, (145), 60 states have internal predecessors, (145), 0 states have call successors, (0), 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 69 [2022-11-23 03:43:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:43:12,296 INFO L225 Difference]: With dead ends: 1002 [2022-11-23 03:43:12,296 INFO L226 Difference]: Without dead ends: 785 [2022-11-23 03:43:12,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 7582 ImplicationChecksByTransitivity, 172.4s TimeCoverageRelationStatistics Valid=1519, Invalid=22023, Unknown=28, NotChecked=610, Total=24180 [2022-11-23 03:43:12,304 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 567 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 2713 mSolverCounterSat, 96 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 2851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2713 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 38.6s IncrementalHoareTripleChecker+Time [2022-11-23 03:43:12,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 619 Invalid, 2851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2713 Invalid, 17 Unknown, 25 Unchecked, 38.6s Time] [2022-11-23 03:43:12,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-11-23 03:43:12,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 390. [2022-11-23 03:43:12,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.3419023136246786) internal successors, (522), 389 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:43:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 522 transitions. [2022-11-23 03:43:12,394 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 522 transitions. Word has length 69 [2022-11-23 03:43:12,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:43:12,395 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 522 transitions. [2022-11-23 03:43:12,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.4166666666666665) internal successors, (145), 60 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:43:12,395 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 522 transitions. [2022-11-23 03:43:12,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-23 03:43:12,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:43:12,397 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:43:12,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 03:43:12,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 03:43:12,607 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:43:12,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:43:12,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1415361629, now seen corresponding path program 2 times [2022-11-23 03:43:12,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:43:12,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213686046] [2022-11-23 03:43:12,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:43:12,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:43:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:43:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-11-23 03:43:14,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:43:14,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213686046] [2022-11-23 03:43:14,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213686046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:43:14,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035704433] [2022-11-23 03:43:14,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:43:14,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:43:14,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:43:14,703 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:43:14,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 03:43:14,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:43:14,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:43:14,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 03:43:14,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:43:15,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:43:15,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:43:15,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:43:15,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:43:15,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 52 [2022-11-23 03:43:15,850 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:43:15,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2022-11-23 03:43:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 121 proven. 47 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-23 03:43:15,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:43:18,370 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_SelectionSort_~rh~0#1_58| Int)) (or (forall ((v_ArrVal_365 Int) (v_ArrVal_364 Int)) (let ((.cse1 (* |c_ULTIMATE.start_SelectionSort_~lh~0#1| 4))) (let ((.cse0 (store (store (select |c_#memory_int| |c_~#array~0.base|) (+ .cse1 |c_~#array~0.offset|) v_ArrVal_365) (+ (* |v_ULTIMATE.start_SelectionSort_~rh~0#1_58| 4) |c_~#array~0.offset|) v_ArrVal_364))) (< (select .cse0 (+ .cse1 |c_~#array~0.offset| 12)) (select .cse0 (+ .cse1 |c_~#array~0.offset| 8)))))) (not (<= |c_ULTIMATE.start_SelectionSort_~i~0#1| |v_ULTIMATE.start_SelectionSort_~rh~0#1_58|)))) is different from false [2022-11-23 03:43:29,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 63 [2022-11-23 03:43:30,031 INFO L321 Elim1Store]: treesize reduction 5, result has 92.8 percent of original size [2022-11-23 03:43:30,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 131 [2022-11-23 03:43:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 122 proven. 35 refuted. 0 times theorem prover too weak. 87 trivial. 11 not checked. [2022-11-23 03:43:30,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035704433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:43:30,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:43:30,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 16] total 40 [2022-11-23 03:43:30,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314847637] [2022-11-23 03:43:30,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:43:30,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-23 03:43:30,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:43:30,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-23 03:43:30,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1331, Unknown=5, NotChecked=74, Total=1560 [2022-11-23 03:43:30,475 INFO L87 Difference]: Start difference. First operand 390 states and 522 transitions. Second operand has 40 states, 40 states have (on average 2.05) internal successors, (82), 40 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:43:33,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:43:35,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:43:37,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:43:38,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:43:40,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:43:42,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:43:44,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:43:46,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:43:48,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:43:53,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:43:55,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:44:27,716 WARN L233 SmtUtils]: Spent 10.52s on a formula simplification. DAG size of input: 47 DAG size of output: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:44:29,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:44:31,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:44:33,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:44:35,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:44:37,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:44:39,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:44:44,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:44:46,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:44:49,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:44:51,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:44:53,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:44:55,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:13,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:15,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:17,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:19,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:21,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:23,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:25,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:27,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:29,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:31,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:34,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:36,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:39,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:45,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:46,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:48,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:50,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:52,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:54,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:45:56,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:46:03,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:46:05,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:46:12,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:46:14,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:46:26,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:46:28,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:46:30,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:46:32,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:46:34,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:46:36,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:46:37,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:46:37,029 INFO L93 Difference]: Finished difference Result 915 states and 1228 transitions. [2022-11-23 03:46:37,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-23 03:46:37,029 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 40 states have internal predecessors, (82), 0 states have call successors, (0), 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 69 [2022-11-23 03:46:37,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:46:37,035 INFO L225 Difference]: With dead ends: 915 [2022-11-23 03:46:37,035 INFO L226 Difference]: Without dead ends: 545 [2022-11-23 03:46:37,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1626 ImplicationChecksByTransitivity, 91.7s TimeCoverageRelationStatistics Valid=547, Invalid=5135, Unknown=22, NotChecked=148, Total=5852 [2022-11-23 03:46:37,039 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 150 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 14 mSolverCounterUnsat, 50 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 109.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 50 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 109.8s IncrementalHoareTripleChecker+Time [2022-11-23 03:46:37,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 292 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1318 Invalid, 50 Unknown, 91 Unchecked, 109.8s Time] [2022-11-23 03:46:37,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-23 03:46:37,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 439. [2022-11-23 03:46:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.3538812785388128) internal successors, (593), 438 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:46:37,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 593 transitions. [2022-11-23 03:46:37,141 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 593 transitions. Word has length 69 [2022-11-23 03:46:37,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:46:37,141 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 593 transitions. [2022-11-23 03:46:37,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 40 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:46:37,147 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 593 transitions. [2022-11-23 03:46:37,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-23 03:46:37,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:46:37,149 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:46:37,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 03:46:37,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 03:46:37,355 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:46:37,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:46:37,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1896441887, now seen corresponding path program 3 times [2022-11-23 03:46:37,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:46:37,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946216302] [2022-11-23 03:46:37,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:46:37,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:46:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:46:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-11-23 03:46:38,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:46:38,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946216302] [2022-11-23 03:46:38,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946216302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:46:38,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908443699] [2022-11-23 03:46:38,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:46:38,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:46:38,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:46:38,369 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:46:38,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 03:46:38,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-23 03:46:38,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:46:38,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 03:46:38,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:46:38,793 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 03:46:38,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-23 03:46:38,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 03:46:38,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 03:46:38,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 03:46:38,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 03:46:39,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 03:46:39,505 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:46:39,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 36 [2022-11-23 03:46:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 78 proven. 16 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-11-23 03:46:39,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:46:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 78 proven. 16 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-11-23 03:46:40,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908443699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:46:40,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:46:40,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2022-11-23 03:46:40,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899906706] [2022-11-23 03:46:40,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:46:40,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 03:46:40,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:46:40,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 03:46:40,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=711, Unknown=1, NotChecked=0, Total=812 [2022-11-23 03:46:40,341 INFO L87 Difference]: Start difference. First operand 439 states and 593 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:46:41,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:46:41,813 INFO L93 Difference]: Finished difference Result 799 states and 1088 transitions. [2022-11-23 03:46:41,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 03:46:41,814 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 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 69 [2022-11-23 03:46:41,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:46:41,816 INFO L225 Difference]: With dead ends: 799 [2022-11-23 03:46:41,816 INFO L226 Difference]: Without dead ends: 385 [2022-11-23 03:46:41,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=332, Invalid=1389, Unknown=1, NotChecked=0, Total=1722 [2022-11-23 03:46:41,817 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 157 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 03:46:41,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 228 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 03:46:41,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-23 03:46:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 378. [2022-11-23 03:46:41,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.363395225464191) internal successors, (514), 377 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:46:41,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 514 transitions. [2022-11-23 03:46:41,918 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 514 transitions. Word has length 69 [2022-11-23 03:46:41,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:46:41,918 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 514 transitions. [2022-11-23 03:46:41,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:46:41,918 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 514 transitions. [2022-11-23 03:46:41,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-23 03:46:41,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:46:41,920 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:46:41,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 03:46:42,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 03:46:42,123 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:46:42,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:46:42,124 INFO L85 PathProgramCache]: Analyzing trace with hash -882650715, now seen corresponding path program 4 times [2022-11-23 03:46:42,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:46:42,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215062154] [2022-11-23 03:46:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:46:42,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:46:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:46:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 94 proven. 24 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-23 03:46:43,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:46:43,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215062154] [2022-11-23 03:46:43,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215062154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:46:43,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947881417] [2022-11-23 03:46:43,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:46:43,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:46:43,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:46:43,083 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:46:43,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 03:46:43,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:46:43,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:46:43,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 03:46:43,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:46:43,320 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 03:46:43,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-23 03:46:43,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 03:46:43,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-23 03:46:44,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-23 03:46:44,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-23 03:46:44,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-23 03:46:44,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-23 03:46:44,673 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 03:46:44,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2022-11-23 03:46:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-11-23 03:46:44,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:46:44,853 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_485 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_485) |c_ULTIMATE.start_main_~#array~1#1.base|) |c_ULTIMATE.start_main_~#array~1#1.offset|) 0)) is different from false [2022-11-23 03:46:45,180 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:46:45,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-23 03:46:45,189 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:46:45,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 26 [2022-11-23 03:46:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 237 trivial. 9 not checked. [2022-11-23 03:46:45,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947881417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:46:45,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:46:45,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2022-11-23 03:46:45,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721613574] [2022-11-23 03:46:45,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:46:45,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 03:46:45,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:46:45,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 03:46:45,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=4, NotChecked=52, Total=812 [2022-11-23 03:46:45,278 INFO L87 Difference]: Start difference. First operand 378 states and 514 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:46:47,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:46:47,622 INFO L93 Difference]: Finished difference Result 737 states and 1010 transitions. [2022-11-23 03:46:47,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 03:46:47,623 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 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 69 [2022-11-23 03:46:47,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:46:47,625 INFO L225 Difference]: With dead ends: 737 [2022-11-23 03:46:47,625 INFO L226 Difference]: Without dead ends: 384 [2022-11-23 03:46:47,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=326, Invalid=1650, Unknown=8, NotChecked=86, Total=2070 [2022-11-23 03:46:47,626 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 154 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 20 mSolverCounterUnsat, 31 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 31 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 03:46:47,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 162 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 248 Invalid, 31 Unknown, 15 Unchecked, 0.5s Time] [2022-11-23 03:46:47,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-11-23 03:46:47,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 381. [2022-11-23 03:46:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.3605263157894736) internal successors, (517), 380 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:46:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 517 transitions. [2022-11-23 03:46:47,742 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 517 transitions. Word has length 69 [2022-11-23 03:46:47,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:46:47,742 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 517 transitions. [2022-11-23 03:46:47,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:46:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 517 transitions. [2022-11-23 03:46:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 03:46:47,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:46:47,744 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:46:47,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 03:46:47,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 03:46:47,950 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:46:47,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:46:47,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1757098617, now seen corresponding path program 1 times [2022-11-23 03:46:47,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:46:47,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694340409] [2022-11-23 03:46:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:46:47,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:46:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:46:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 117 proven. 73 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-23 03:46:49,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:46:49,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694340409] [2022-11-23 03:46:49,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694340409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:46:49,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443069238] [2022-11-23 03:46:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:46:49,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:46:49,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:46:49,430 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:46:49,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 03:46:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:46:49,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-23 03:46:49,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:46:49,652 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 03:46:49,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-23 03:46:49,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-23 03:46:49,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-23 03:46:49,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-23 03:46:49,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-23 03:46:49,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-23 03:46:50,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:46:50,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:46:50,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:46:50,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:46:50,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-11-23 03:46:51,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:46:51,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:46:51,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:46:51,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:46:51,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 18 [2022-11-23 03:46:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 117 proven. 86 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-23 03:46:51,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:46:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 127 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-23 03:46:54,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443069238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:46:54,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:46:54,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 20] total 58 [2022-11-23 03:46:54,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650938219] [2022-11-23 03:46:54,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:46:54,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-23 03:46:54,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:46:54,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-23 03:46:54,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=3075, Unknown=2, NotChecked=0, Total=3422 [2022-11-23 03:46:54,336 INFO L87 Difference]: Start difference. First operand 381 states and 517 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:04,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:47:04,365 INFO L93 Difference]: Finished difference Result 913 states and 1255 transitions. [2022-11-23 03:47:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-23 03:47:04,366 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-23 03:47:04,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:47:04,368 INFO L225 Difference]: With dead ends: 913 [2022-11-23 03:47:04,368 INFO L226 Difference]: Without dead ends: 583 [2022-11-23 03:47:04,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2418 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1590, Invalid=8710, Unknown=2, NotChecked=0, Total=10302 [2022-11-23 03:47:04,370 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 749 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 115 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-23 03:47:04,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [749 Valid, 285 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 967 Invalid, 4 Unknown, 0 Unchecked, 1.9s Time] [2022-11-23 03:47:04,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-11-23 03:47:04,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 427. [2022-11-23 03:47:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 1.3474178403755868) internal successors, (574), 426 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:04,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 574 transitions. [2022-11-23 03:47:04,517 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 574 transitions. Word has length 73 [2022-11-23 03:47:04,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:47:04,517 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 574 transitions. [2022-11-23 03:47:04,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:04,518 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 574 transitions. [2022-11-23 03:47:04,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 03:47:04,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:47:04,519 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:47:04,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 03:47:04,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 03:47:04,726 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:47:04,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:47:04,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1737329913, now seen corresponding path program 2 times [2022-11-23 03:47:04,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:47:04,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582999888] [2022-11-23 03:47:04,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:47:04,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:47:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:47:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 119 proven. 29 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-23 03:47:06,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:47:06,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582999888] [2022-11-23 03:47:06,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582999888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:47:06,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975475339] [2022-11-23 03:47:06,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:47:06,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:47:06,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:47:06,025 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:47:06,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 03:47:06,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:47:06,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:47:06,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-23 03:47:06,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:47:06,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 24 [2022-11-23 03:47:06,870 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:47:06,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 44 [2022-11-23 03:47:07,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:47:07,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2022-11-23 03:47:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 55 proven. 142 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-23 03:47:07,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:47:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-23 03:47:07,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975475339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:47:07,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:47:07,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 11] total 36 [2022-11-23 03:47:07,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134013032] [2022-11-23 03:47:07,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:47:07,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-23 03:47:07,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:47:07,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-23 03:47:07,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2022-11-23 03:47:07,955 INFO L87 Difference]: Start difference. First operand 427 states and 574 transitions. Second operand has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:17,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:47:25,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:47:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:47:29,720 INFO L93 Difference]: Finished difference Result 1059 states and 1456 transitions. [2022-11-23 03:47:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-23 03:47:29,721 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 0 states have call successors, (0), 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 73 [2022-11-23 03:47:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:47:29,724 INFO L225 Difference]: With dead ends: 1059 [2022-11-23 03:47:29,724 INFO L226 Difference]: Without dead ends: 709 [2022-11-23 03:47:29,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=904, Invalid=6751, Unknown=1, NotChecked=0, Total=7656 [2022-11-23 03:47:29,728 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 446 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 51 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-23 03:47:29,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 296 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1061 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2022-11-23 03:47:29,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-11-23 03:47:29,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 435. [2022-11-23 03:47:29,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.3571428571428572) internal successors, (589), 434 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:29,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 589 transitions. [2022-11-23 03:47:29,855 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 589 transitions. Word has length 73 [2022-11-23 03:47:29,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:47:29,855 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 589 transitions. [2022-11-23 03:47:29,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:29,856 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 589 transitions. [2022-11-23 03:47:29,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 03:47:29,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:47:29,857 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:47:29,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 03:47:30,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:47:30,063 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:47:30,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:47:30,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1196191227, now seen corresponding path program 3 times [2022-11-23 03:47:30,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:47:30,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598805825] [2022-11-23 03:47:30,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:47:30,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:47:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:47:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 90 proven. 131 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 03:47:32,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:47:32,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598805825] [2022-11-23 03:47:32,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598805825] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:47:32,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393516014] [2022-11-23 03:47:32,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:47:32,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:47:32,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:47:32,112 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:47:32,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 03:47:32,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-23 03:47:32,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:47:32,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-23 03:47:32,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:47:32,536 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 03:47:32,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-23 03:47:32,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 03:47:32,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-23 03:47:35,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-11-23 03:47:35,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-11-23 03:47:35,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-11-23 03:47:35,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-11-23 03:47:35,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-11-23 03:47:36,187 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 03:47:36,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 25 [2022-11-23 03:47:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-11-23 03:47:36,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:47:36,442 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_670 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_670) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 4)) 1)) is different from false [2022-11-23 03:47:36,959 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:47:36,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2022-11-23 03:47:36,972 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:47:36,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2022-11-23 03:47:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 230 trivial. 9 not checked. [2022-11-23 03:47:37,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393516014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:47:37,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:47:37,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 12] total 42 [2022-11-23 03:47:37,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91126916] [2022-11-23 03:47:37,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:47:37,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-23 03:47:37,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:47:37,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-23 03:47:37,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1567, Unknown=6, NotChecked=80, Total=1806 [2022-11-23 03:47:37,110 INFO L87 Difference]: Start difference. First operand 435 states and 589 transitions. Second operand has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:39,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-23 03:47:44,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:47:44,735 INFO L93 Difference]: Finished difference Result 727 states and 1004 transitions. [2022-11-23 03:47:44,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-23 03:47:44,735 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 states have internal predecessors, (113), 0 states have call successors, (0), 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 73 [2022-11-23 03:47:44,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:47:44,738 INFO L225 Difference]: With dead ends: 727 [2022-11-23 03:47:44,738 INFO L226 Difference]: Without dead ends: 514 [2022-11-23 03:47:44,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=851, Invalid=4403, Unknown=6, NotChecked=142, Total=5402 [2022-11-23 03:47:44,740 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 638 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:47:44,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 298 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 820 Invalid, 1 Unknown, 19 Unchecked, 3.1s Time] [2022-11-23 03:47:44,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-11-23 03:47:44,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 458. [2022-11-23 03:47:44,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.3479212253829322) internal successors, (616), 457 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:44,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 616 transitions. [2022-11-23 03:47:44,883 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 616 transitions. Word has length 73 [2022-11-23 03:47:44,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:47:44,883 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 616 transitions. [2022-11-23 03:47:44,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:47:44,883 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 616 transitions. [2022-11-23 03:47:44,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-23 03:47:44,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:47:44,885 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:47:44,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 03:47:45,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 03:47:45,091 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:47:45,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:47:45,092 INFO L85 PathProgramCache]: Analyzing trace with hash 498123733, now seen corresponding path program 4 times [2022-11-23 03:47:45,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:47:45,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240506606] [2022-11-23 03:47:45,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:47:45,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:47:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:47:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 108 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 03:47:47,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:47:47,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240506606] [2022-11-23 03:47:47,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240506606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:47:47,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494517494] [2022-11-23 03:47:47,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:47:47,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:47:47,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:47:47,394 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:47:47,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b05f57a0-05d4-4ff3-bf56-f6a5cf0deac9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 03:47:47,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:47:47,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:47:47,549 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-23 03:47:47,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:47:47,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 03:47:47,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-23 03:47:47,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:47:47,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 46 [2022-11-23 03:47:47,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:47:47,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 63 [2022-11-23 03:47:48,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:47:48,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 80 [2022-11-23 03:47:49,781 INFO L321 Elim1Store]: treesize reduction 336, result has 15.2 percent of original size [2022-11-23 03:47:49,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 91 treesize of output 94 [2022-11-23 03:47:51,628 INFO L321 Elim1Store]: treesize reduction 541, result has 32.9 percent of original size [2022-11-23 03:47:51,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 26 case distinctions, treesize of input 113 treesize of output 316 [2022-11-23 03:48:11,815 WARN L233 SmtUtils]: Spent 10.64s on a formula simplification. DAG size of input: 896 DAG size of output: 292 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 03:48:11,817 INFO L321 Elim1Store]: treesize reduction 5764, result has 18.0 percent of original size [2022-11-23 03:48:11,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 23 select indices, 23 select index equivalence classes, 0 disjoint index pairs (out of 253 index pairs), introduced 23 new quantified variables, introduced 275 case distinctions, treesize of input 764 treesize of output 1678 [2022-11-23 03:51:52,645 WARN L233 SmtUtils]: Spent 17.85s on a formula simplification. DAG size of input: 652 DAG size of output: 198 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:52:38,829 WARN L233 SmtUtils]: Spent 33.88s on a formula simplification. DAG size of input: 1563 DAG size of output: 355 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 03:52:38,830 INFO L321 Elim1Store]: treesize reduction 8889, result has 16.7 percent of original size [2022-11-23 03:52:38,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 30 select indices, 30 select index equivalence classes, 0 disjoint index pairs (out of 435 index pairs), introduced 30 new quantified variables, introduced 463 case distinctions, treesize of input 834 treesize of output 2239