./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/mapavg2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/mapavg2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6d7fe9c34679d798c6b36a6da45b624905fd34eacba0ad01b9dbff2dd0ff5bf6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 22:20:09,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 22:20:09,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 22:20:09,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 22:20:09,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 22:20:09,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 22:20:09,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 22:20:09,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 22:20:09,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 22:20:09,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 22:20:09,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 22:20:09,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 22:20:09,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 22:20:09,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 22:20:09,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 22:20:09,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 22:20:09,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 22:20:09,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 22:20:09,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 22:20:09,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 22:20:09,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 22:20:09,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 22:20:09,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 22:20:09,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 22:20:09,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 22:20:09,434 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 22:20:09,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 22:20:09,435 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 22:20:09,435 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 22:20:09,436 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 22:20:09,436 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 22:20:09,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 22:20:09,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 22:20:09,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 22:20:09,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 22:20:09,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 22:20:09,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 22:20:09,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 22:20:09,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 22:20:09,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 22:20:09,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 22:20:09,440 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 22:20:09,454 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 22:20:09,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 22:20:09,454 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 22:20:09,454 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 22:20:09,455 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 22:20:09,455 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 22:20:09,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 22:20:09,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 22:20:09,456 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 22:20:09,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 22:20:09,456 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 22:20:09,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 22:20:09,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 22:20:09,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 22:20:09,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 22:20:09,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 22:20:09,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 22:20:09,456 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 22:20:09,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 22:20:09,457 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 22:20:09,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 22:20:09,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 22:20:09,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 22:20:09,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 22:20:09,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:20:09,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 22:20:09,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 22:20:09,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 22:20:09,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 22:20:09,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 22:20:09,458 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 22:20:09,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 22:20:09,458 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 22:20:09,458 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 22:20:09,458 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 22:20:09,458 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_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d7fe9c34679d798c6b36a6da45b624905fd34eacba0ad01b9dbff2dd0ff5bf6 [2022-12-13 22:20:09,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 22:20:09,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 22:20:09,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 22:20:09,635 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 22:20:09,635 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 22:20:09,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-crafted/mapavg2.i [2022-12-13 22:20:12,229 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 22:20:12,373 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 22:20:12,374 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/sv-benchmarks/c/array-crafted/mapavg2.i [2022-12-13 22:20:12,379 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/data/88c13f7c2/dd5a5a5bba5e408b92b5f790af996537/FLAG2fa526c13 [2022-12-13 22:20:12,393 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/data/88c13f7c2/dd5a5a5bba5e408b92b5f790af996537 [2022-12-13 22:20:12,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 22:20:12,397 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 22:20:12,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 22:20:12,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 22:20:12,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 22:20:12,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:20:12" (1/1) ... [2022-12-13 22:20:12,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f1d409c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:20:12, skipping insertion in model container [2022-12-13 22:20:12,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:20:12" (1/1) ... [2022-12-13 22:20:12,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 22:20:12,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 22:20:12,559 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_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/sv-benchmarks/c/array-crafted/mapavg2.i[1313,1326] [2022-12-13 22:20:12,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:20:12,572 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 22:20:12,592 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_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/sv-benchmarks/c/array-crafted/mapavg2.i[1313,1326] [2022-12-13 22:20:12,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:20:12,606 INFO L208 MainTranslator]: Completed translation [2022-12-13 22:20:12,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:20:12 WrapperNode [2022-12-13 22:20:12,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 22:20:12,608 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 22:20:12,608 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 22:20:12,608 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 22:20:12,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:20:12" (1/1) ... [2022-12-13 22:20:12,622 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:20:12" (1/1) ... [2022-12-13 22:20:12,640 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-12-13 22:20:12,640 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 22:20:12,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 22:20:12,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 22:20:12,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 22:20:12,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:20:12" (1/1) ... [2022-12-13 22:20:12,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:20:12" (1/1) ... [2022-12-13 22:20:12,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:20:12" (1/1) ... [2022-12-13 22:20:12,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:20:12" (1/1) ... [2022-12-13 22:20:12,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:20:12" (1/1) ... [2022-12-13 22:20:12,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:20:12" (1/1) ... [2022-12-13 22:20:12,661 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:20:12" (1/1) ... [2022-12-13 22:20:12,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:20:12" (1/1) ... [2022-12-13 22:20:12,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 22:20:12,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 22:20:12,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 22:20:12,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 22:20:12,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:20:12" (1/1) ... [2022-12-13 22:20:12,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:20:12,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:20:12,691 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 22:20:12,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 22:20:12,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 22:20:12,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 22:20:12,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 22:20:12,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 22:20:12,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 22:20:12,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 22:20:12,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 22:20:12,724 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2022-12-13 22:20:12,724 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2022-12-13 22:20:12,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 22:20:12,784 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 22:20:12,786 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 22:20:12,914 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 22:20:12,921 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 22:20:12,921 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 22:20:12,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:20:12 BoogieIcfgContainer [2022-12-13 22:20:12,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 22:20:12,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 22:20:12,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 22:20:12,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 22:20:12,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:20:12" (1/3) ... [2022-12-13 22:20:12,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5234dbdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:20:12, skipping insertion in model container [2022-12-13 22:20:12,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:20:12" (2/3) ... [2022-12-13 22:20:12,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5234dbdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:20:12, skipping insertion in model container [2022-12-13 22:20:12,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:20:12" (3/3) ... [2022-12-13 22:20:12,932 INFO L112 eAbstractionObserver]: Analyzing ICFG mapavg2.i [2022-12-13 22:20:12,952 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 22:20:12,953 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 22:20:13,002 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:20:13,010 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;@6727323, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:20:13,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 22:20:13,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 22:20:13,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 22:20:13,025 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:20:13,025 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:20:13,026 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:20:13,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:20:13,031 INFO L85 PathProgramCache]: Analyzing trace with hash -141219973, now seen corresponding path program 1 times [2022-12-13 22:20:13,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:20:13,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750014779] [2022-12-13 22:20:13,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:20:13,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:20:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:13,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 22:20:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:13,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 22:20:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:13,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 22:20:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 22:20:13,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:20:13,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750014779] [2022-12-13 22:20:13,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750014779] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:20:13,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215124219] [2022-12-13 22:20:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:20:13,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:13,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:20:13,312 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:20:13,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 22:20:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:13,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 22:20:13,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:20:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 22:20:13,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:20:13,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215124219] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:20:13,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 22:20:13,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-13 22:20:13,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199987559] [2022-12-13 22:20:13,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:20:13,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:20:13,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:20:13,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:20:13,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:20:13,449 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 22:20:13,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:20:13,479 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-12-13 22:20:13,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:20:13,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-12-13 22:20:13,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:20:13,488 INFO L225 Difference]: With dead ends: 50 [2022-12-13 22:20:13,489 INFO L226 Difference]: Without dead ends: 24 [2022-12-13 22:20:13,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:20:13,495 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:20:13,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:20:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-13 22:20:13,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-12-13 22:20:13,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 22:20:13,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-12-13 22:20:13,531 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-12-13 22:20:13,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:20:13,532 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-12-13 22:20:13,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 22:20:13,532 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-12-13 22:20:13,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 22:20:13,534 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:20:13,534 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:20:13,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 22:20:13,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-13 22:20:13,735 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:20:13,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:20:13,736 INFO L85 PathProgramCache]: Analyzing trace with hash -618478211, now seen corresponding path program 1 times [2022-12-13 22:20:13,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:20:13,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403703983] [2022-12-13 22:20:13,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:20:13,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:20:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:13,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 22:20:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:13,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 22:20:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:13,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-12-13 22:20:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 22:20:13,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:20:13,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403703983] [2022-12-13 22:20:13,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403703983] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:20:13,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155726990] [2022-12-13 22:20:13,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:20:13,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:13,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:20:13,881 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:20:13,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 22:20:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:13,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 22:20:13,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:20:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 22:20:13,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:20:13,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155726990] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:20:13,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 22:20:13,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-13 22:20:13,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111710559] [2022-12-13 22:20:13,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:20:13,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:20:13,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:20:13,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:20:13,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:20:13,952 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 22:20:13,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:20:13,962 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-12-13 22:20:13,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:20:13,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-12-13 22:20:13,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:20:13,964 INFO L225 Difference]: With dead ends: 42 [2022-12-13 22:20:13,964 INFO L226 Difference]: Without dead ends: 25 [2022-12-13 22:20:13,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:20:13,965 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:20:13,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:20:13,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-13 22:20:13,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-12-13 22:20:13,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 22:20:13,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-12-13 22:20:13,970 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2022-12-13 22:20:13,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:20:13,971 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-12-13 22:20:13,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 22:20:13,971 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-12-13 22:20:13,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 22:20:13,972 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:20:13,972 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:20:13,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 22:20:14,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:14,174 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:20:14,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:20:14,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1511029509, now seen corresponding path program 1 times [2022-12-13 22:20:14,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:20:14,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995920134] [2022-12-13 22:20:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:20:14,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:20:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:14,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 22:20:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:14,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 22:20:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:14,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-12-13 22:20:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 22:20:14,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:20:14,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995920134] [2022-12-13 22:20:14,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995920134] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:20:14,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331029026] [2022-12-13 22:20:14,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:20:14,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:14,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:20:14,407 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:20:14,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 22:20:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:14,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 22:20:14,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:20:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 22:20:14,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:20:14,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331029026] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:20:14,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 22:20:14,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-13 22:20:14,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202599297] [2022-12-13 22:20:14,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:20:14,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:20:14,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:20:14,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:20:14,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:20:14,481 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 22:20:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:20:14,489 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-12-13 22:20:14,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:20:14,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-12-13 22:20:14,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:20:14,491 INFO L225 Difference]: With dead ends: 39 [2022-12-13 22:20:14,491 INFO L226 Difference]: Without dead ends: 26 [2022-12-13 22:20:14,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:20:14,492 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:20:14,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:20:14,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-13 22:20:14,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-12-13 22:20:14,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 22:20:14,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-12-13 22:20:14,495 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2022-12-13 22:20:14,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:20:14,496 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-12-13 22:20:14,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 22:20:14,496 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-12-13 22:20:14,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-13 22:20:14,497 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:20:14,497 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:20:14,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 22:20:14,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-13 22:20:14,698 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:20:14,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:20:14,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1553738215, now seen corresponding path program 1 times [2022-12-13 22:20:14,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:20:14,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996326425] [2022-12-13 22:20:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:20:14,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:20:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:14,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 22:20:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:14,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 22:20:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:14,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-12-13 22:20:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 22:20:14,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:20:14,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996326425] [2022-12-13 22:20:14,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996326425] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:20:14,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646633478] [2022-12-13 22:20:14,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:20:14,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:14,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:20:14,859 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:20:14,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 22:20:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:14,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 22:20:14,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:20:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 22:20:14,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:20:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 22:20:14,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646633478] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:20:14,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:20:14,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-12-13 22:20:14,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734770343] [2022-12-13 22:20:14,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:20:14,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 22:20:14,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:20:14,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 22:20:14,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 22:20:14,982 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 22:20:15,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:20:15,013 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-12-13 22:20:15,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:20:15,014 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-12-13 22:20:15,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:20:15,014 INFO L225 Difference]: With dead ends: 54 [2022-12-13 22:20:15,014 INFO L226 Difference]: Without dead ends: 34 [2022-12-13 22:20:15,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 22:20:15,015 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:20:15,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 102 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:20:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-13 22:20:15,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-12-13 22:20:15,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 22:20:15,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-12-13 22:20:15,019 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2022-12-13 22:20:15,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:20:15,019 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-12-13 22:20:15,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 22:20:15,019 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-12-13 22:20:15,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 22:20:15,020 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:20:15,020 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:20:15,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 22:20:15,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:15,221 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:20:15,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:20:15,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1124150243, now seen corresponding path program 2 times [2022-12-13 22:20:15,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:20:15,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999405640] [2022-12-13 22:20:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:20:15,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:20:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:15,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 22:20:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:15,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 22:20:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:15,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-12-13 22:20:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-13 22:20:15,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:20:15,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999405640] [2022-12-13 22:20:15,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999405640] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:20:15,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856366576] [2022-12-13 22:20:15,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:20:15,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:15,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:20:15,345 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:20:15,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 22:20:15,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:20:15,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:20:15,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 22:20:15,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:20:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-13 22:20:15,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:20:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-13 22:20:15,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856366576] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:20:15,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:20:15,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-12-13 22:20:15,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164425866] [2022-12-13 22:20:15,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:20:15,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 22:20:15,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:20:15,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 22:20:15,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-13 22:20:15,527 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-13 22:20:15,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:20:15,575 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-12-13 22:20:15,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 22:20:15,575 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-12-13 22:20:15,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:20:15,576 INFO L225 Difference]: With dead ends: 70 [2022-12-13 22:20:15,576 INFO L226 Difference]: Without dead ends: 48 [2022-12-13 22:20:15,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-13 22:20:15,578 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:20:15,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:20:15,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-13 22:20:15,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-12-13 22:20:15,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 22:20:15,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-12-13 22:20:15,585 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2022-12-13 22:20:15,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:20:15,585 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-12-13 22:20:15,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-13 22:20:15,585 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-12-13 22:20:15,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 22:20:15,587 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:20:15,587 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:20:15,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 22:20:15,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:15,788 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:20:15,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:20:15,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1238744391, now seen corresponding path program 3 times [2022-12-13 22:20:15,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:20:15,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388595712] [2022-12-13 22:20:15,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:20:15,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:20:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:16,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 22:20:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:16,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-12-13 22:20:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:16,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 22:20:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-12-13 22:20:16,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:20:16,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388595712] [2022-12-13 22:20:16,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388595712] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:20:16,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640750693] [2022-12-13 22:20:16,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:20:16,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:16,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:20:16,111 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:20:16,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 22:20:16,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 22:20:16,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:20:16,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 22:20:16,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:20:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-12-13 22:20:16,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:20:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-12-13 22:20:16,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640750693] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:20:16,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:20:16,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-12-13 22:20:16,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714553637] [2022-12-13 22:20:16,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:20:16,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 22:20:16,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:20:16,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 22:20:16,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-12-13 22:20:16,261 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 22:20:16,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:20:16,309 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2022-12-13 22:20:16,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 22:20:16,310 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2022-12-13 22:20:16,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:20:16,311 INFO L225 Difference]: With dead ends: 82 [2022-12-13 22:20:16,311 INFO L226 Difference]: Without dead ends: 58 [2022-12-13 22:20:16,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-12-13 22:20:16,312 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:20:16,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 102 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:20:16,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-13 22:20:16,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-12-13 22:20:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 22:20:16,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-12-13 22:20:16,320 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 64 [2022-12-13 22:20:16,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:20:16,320 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-12-13 22:20:16,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 22:20:16,321 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-12-13 22:20:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-13 22:20:16,322 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:20:16,322 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:20:16,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 22:20:16,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 22:20:16,524 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:20:16,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:20:16,526 INFO L85 PathProgramCache]: Analyzing trace with hash 85970241, now seen corresponding path program 4 times [2022-12-13 22:20:16,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:20:16,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538808157] [2022-12-13 22:20:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:20:16,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:20:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:16,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-12-13 22:20:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:16,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 22:20:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:16,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-12-13 22:20:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-12-13 22:20:16,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:20:16,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538808157] [2022-12-13 22:20:16,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538808157] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:20:16,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643977756] [2022-12-13 22:20:16,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:20:16,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:16,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:20:16,906 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:20:16,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 22:20:17,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:20:17,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:20:17,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 22:20:17,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:20:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-12-13 22:20:17,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:20:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-12-13 22:20:17,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643977756] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:20:17,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:20:17,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-12-13 22:20:17,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424313393] [2022-12-13 22:20:17,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:20:17,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 22:20:17,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:20:17,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 22:20:17,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-12-13 22:20:17,088 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 22:20:17,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:20:17,139 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-12-13 22:20:17,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 22:20:17,140 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2022-12-13 22:20:17,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:20:17,141 INFO L225 Difference]: With dead ends: 100 [2022-12-13 22:20:17,141 INFO L226 Difference]: Without dead ends: 68 [2022-12-13 22:20:17,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-12-13 22:20:17,143 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:20:17,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 81 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:20:17,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-13 22:20:17,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-12-13 22:20:17,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 22:20:17,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-12-13 22:20:17,152 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 90 [2022-12-13 22:20:17,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:20:17,153 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-12-13 22:20:17,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 22:20:17,153 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-12-13 22:20:17,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-13 22:20:17,155 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:20:17,155 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:20:17,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 22:20:17,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 22:20:17,356 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:20:17,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:20:17,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2002416443, now seen corresponding path program 5 times [2022-12-13 22:20:17,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:20:17,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834903390] [2022-12-13 22:20:17,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:20:17,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:20:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:17,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-12-13 22:20:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:17,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 22:20:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:17,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-12-13 22:20:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2022-12-13 22:20:17,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:20:17,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834903390] [2022-12-13 22:20:17,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834903390] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:20:17,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025473986] [2022-12-13 22:20:17,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 22:20:17,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:17,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:20:17,726 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:20:17,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 22:20:18,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-12-13 22:20:18,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:20:18,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 22:20:18,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:20:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-12-13 22:20:18,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:20:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-12-13 22:20:18,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025473986] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:20:18,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:20:18,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-12-13 22:20:18,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440177437] [2022-12-13 22:20:18,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:20:18,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 22:20:18,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:20:18,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 22:20:18,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-12-13 22:20:18,949 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 22:20:19,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:20:19,033 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2022-12-13 22:20:19,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 22:20:19,033 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 100 [2022-12-13 22:20:19,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:20:19,033 INFO L225 Difference]: With dead ends: 126 [2022-12-13 22:20:19,034 INFO L226 Difference]: Without dead ends: 86 [2022-12-13 22:20:19,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-12-13 22:20:19,035 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:20:19,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:20:19,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-12-13 22:20:19,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-12-13 22:20:19,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 22:20:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-12-13 22:20:19,040 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 100 [2022-12-13 22:20:19,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:20:19,040 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-12-13 22:20:19,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 22:20:19,040 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-12-13 22:20:19,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-13 22:20:19,042 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:20:19,042 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 13, 13, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:20:19,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 22:20:19,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:19,243 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:20:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:20:19,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1921824045, now seen corresponding path program 6 times [2022-12-13 22:20:19,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:20:19,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895855320] [2022-12-13 22:20:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:20:19,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:20:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:19,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-12-13 22:20:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:19,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-12-13 22:20:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:19,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-12-13 22:20:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-12-13 22:20:19,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:20:19,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895855320] [2022-12-13 22:20:19,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895855320] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:20:19,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951936958] [2022-12-13 22:20:19,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 22:20:19,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:19,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:20:19,633 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:20:19,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 22:20:20,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-12-13 22:20:20,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:20:20,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 22:20:20,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:20:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2022-12-13 22:20:20,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:20:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2022-12-13 22:20:20,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951936958] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:20:20,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:20:20,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2022-12-13 22:20:20,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694300403] [2022-12-13 22:20:20,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:20:20,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 22:20:20,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:20:20,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 22:20:20,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-12-13 22:20:20,380 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 22:20:20,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:20:20,459 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2022-12-13 22:20:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 22:20:20,459 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2022-12-13 22:20:20,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:20:20,460 INFO L225 Difference]: With dead ends: 160 [2022-12-13 22:20:20,460 INFO L226 Difference]: Without dead ends: 104 [2022-12-13 22:20:20,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-12-13 22:20:20,462 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:20:20,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 120 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:20:20,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-13 22:20:20,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-12-13 22:20:20,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 22:20:20,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2022-12-13 22:20:20,467 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 150 [2022-12-13 22:20:20,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:20:20,467 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2022-12-13 22:20:20,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 22:20:20,468 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2022-12-13 22:20:20,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-13 22:20:20,469 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:20:20,469 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:20:20,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 22:20:20,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 22:20:20,671 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:20:20,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:20:20,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1322781599, now seen corresponding path program 7 times [2022-12-13 22:20:20,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:20:20,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865464451] [2022-12-13 22:20:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:20:20,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:20:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:21,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-12-13 22:20:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:21,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-12-13 22:20:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:21,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 22:20:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-12-13 22:20:21,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:20:21,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865464451] [2022-12-13 22:20:21,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865464451] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:20:21,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699655476] [2022-12-13 22:20:21,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 22:20:21,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:21,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:20:21,075 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:20:21,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 22:20:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:21,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 22:20:21,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:20:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-12-13 22:20:21,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:20:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-12-13 22:20:21,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699655476] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:20:21,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:20:21,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-12-13 22:20:21,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336482828] [2022-12-13 22:20:21,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:20:21,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 22:20:21,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:20:21,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 22:20:21,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 22:20:21,511 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 22:20:21,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:20:21,578 INFO L93 Difference]: Finished difference Result 207 states and 230 transitions. [2022-12-13 22:20:21,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 22:20:21,579 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 168 [2022-12-13 22:20:21,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:20:21,580 INFO L225 Difference]: With dead ends: 207 [2022-12-13 22:20:21,580 INFO L226 Difference]: Without dead ends: 135 [2022-12-13 22:20:21,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 22:20:21,582 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:20:21,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 112 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:20:21,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-13 22:20:21,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-12-13 22:20:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 22:20:21,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2022-12-13 22:20:21,596 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 168 [2022-12-13 22:20:21,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:20:21,597 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2022-12-13 22:20:21,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 22:20:21,597 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2022-12-13 22:20:21,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-12-13 22:20:21,599 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:20:21,599 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 30, 30, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:20:21,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 22:20:21,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:21,800 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:20:21,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:20:21,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1725939777, now seen corresponding path program 8 times [2022-12-13 22:20:21,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:20:21,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225792616] [2022-12-13 22:20:21,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:20:21,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:20:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:22,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-12-13 22:20:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:22,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-12-13 22:20:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:22,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-12-13 22:20:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-12-13 22:20:22,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:20:22,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225792616] [2022-12-13 22:20:22,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225792616] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:20:22,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153246319] [2022-12-13 22:20:22,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:20:22,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:22,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:20:22,540 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:20:22,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 22:20:22,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:20:22,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:20:22,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 22:20:22,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:20:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-12-13 22:20:22,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:20:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-12-13 22:20:23,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153246319] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:20:23,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:20:23,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-12-13 22:20:23,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026328873] [2022-12-13 22:20:23,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:20:23,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-13 22:20:23,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:20:23,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-13 22:20:23,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 22:20:23,679 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 22:20:23,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:20:23,808 INFO L93 Difference]: Finished difference Result 271 states and 310 transitions. [2022-12-13 22:20:23,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-13 22:20:23,809 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 200 [2022-12-13 22:20:23,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:20:23,810 INFO L225 Difference]: With dead ends: 271 [2022-12-13 22:20:23,810 INFO L226 Difference]: Without dead ends: 199 [2022-12-13 22:20:23,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 22:20:23,812 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:20:23,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 178 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:20:23,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-12-13 22:20:23,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-12-13 22:20:23,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 22:20:23,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2022-12-13 22:20:23,823 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 200 [2022-12-13 22:20:23,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:20:23,824 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2022-12-13 22:20:23,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 22:20:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2022-12-13 22:20:23,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-12-13 22:20:23,827 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:20:23,828 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:20:23,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 22:20:24,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:24,029 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:20:24,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:20:24,030 INFO L85 PathProgramCache]: Analyzing trace with hash -148428801, now seen corresponding path program 9 times [2022-12-13 22:20:24,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:20:24,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93431497] [2022-12-13 22:20:24,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:20:24,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:20:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:26,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-12-13 22:20:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:26,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-12-13 22:20:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:26,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2022-12-13 22:20:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-12-13 22:20:26,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:20:26,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93431497] [2022-12-13 22:20:26,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93431497] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:20:26,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920108989] [2022-12-13 22:20:26,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:20:26,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:26,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:20:26,165 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:20:26,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 22:20:29,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-13 22:20:29,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:20:29,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 22:20:29,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:20:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4859 trivial. 0 not checked. [2022-12-13 22:20:29,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:20:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4859 trivial. 0 not checked. [2022-12-13 22:20:30,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920108989] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:20:30,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:20:30,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 17, 17] total 95 [2022-12-13 22:20:30,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029820744] [2022-12-13 22:20:30,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:20:30,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-12-13 22:20:30,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:20:30,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-12-13 22:20:30,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2575, Invalid=6355, Unknown=0, NotChecked=0, Total=8930 [2022-12-13 22:20:30,194 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 22:20:30,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:20:30,393 INFO L93 Difference]: Finished difference Result 306 states and 333 transitions. [2022-12-13 22:20:30,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-12-13 22:20:30,393 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 264 [2022-12-13 22:20:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:20:30,395 INFO L225 Difference]: With dead ends: 306 [2022-12-13 22:20:30,395 INFO L226 Difference]: Without dead ends: 234 [2022-12-13 22:20:30,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2575, Invalid=6355, Unknown=0, NotChecked=0, Total=8930 [2022-12-13 22:20:30,398 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:20:30,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 122 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:20:30,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-12-13 22:20:30,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2022-12-13 22:20:30,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.013157894736842) internal successors, (231), 228 states have internal predecessors, (231), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 22:20:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 237 transitions. [2022-12-13 22:20:30,410 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 237 transitions. Word has length 264 [2022-12-13 22:20:30,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:20:30,410 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 237 transitions. [2022-12-13 22:20:30,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 22:20:30,411 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 237 transitions. [2022-12-13 22:20:30,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-12-13 22:20:30,417 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:20:30,417 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 63, 63, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:20:30,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 22:20:30,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 22:20:30,619 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:20:30,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:20:30,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2022869279, now seen corresponding path program 10 times [2022-12-13 22:20:30,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:20:30,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591135198] [2022-12-13 22:20:30,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:20:30,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:20:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:32,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-12-13 22:20:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:32,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-12-13 22:20:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:32,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2022-12-13 22:20:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 8491 trivial. 0 not checked. [2022-12-13 22:20:32,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:20:32,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591135198] [2022-12-13 22:20:32,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591135198] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:20:32,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345146141] [2022-12-13 22:20:32,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:20:32,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:32,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:20:32,778 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:20:32,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 22:20:33,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:20:33,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:20:33,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 22:20:33,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:20:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 5591 proven. 900 refuted. 0 times theorem prover too weak. 5969 trivial. 0 not checked. [2022-12-13 22:20:33,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:20:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 1864 proven. 2764 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2022-12-13 22:20:35,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345146141] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:20:35,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:20:35,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 33, 33] total 128 [2022-12-13 22:20:35,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022374451] [2022-12-13 22:20:35,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:20:35,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-12-13 22:20:35,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:20:35,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-12-13 22:20:35,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2022-12-13 22:20:35,295 INFO L87 Difference]: Start difference. First operand 233 states and 237 transitions. Second operand has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 22:20:35,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:20:35,558 INFO L93 Difference]: Finished difference Result 404 states and 447 transitions. [2022-12-13 22:20:35,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-12-13 22:20:35,559 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 362 [2022-12-13 22:20:35,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:20:35,560 INFO L225 Difference]: With dead ends: 404 [2022-12-13 22:20:35,560 INFO L226 Difference]: Without dead ends: 300 [2022-12-13 22:20:35,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 668 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3906 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2022-12-13 22:20:35,562 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 22:20:35,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 202 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 22:20:35,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-12-13 22:20:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2022-12-13 22:20:35,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.010204081632653) internal successors, (297), 294 states have internal predecessors, (297), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 22:20:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 303 transitions. [2022-12-13 22:20:35,569 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 303 transitions. Word has length 362 [2022-12-13 22:20:35,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:20:35,570 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 303 transitions. [2022-12-13 22:20:35,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 22:20:35,570 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 303 transitions. [2022-12-13 22:20:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2022-12-13 22:20:35,572 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:20:35,572 INFO L195 NwaCegarLoop]: trace histogram [186, 186, 64, 64, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:20:35,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 22:20:35,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 22:20:35,774 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:20:35,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:20:35,775 INFO L85 PathProgramCache]: Analyzing trace with hash 686301475, now seen corresponding path program 11 times [2022-12-13 22:20:35,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:20:35,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931309856] [2022-12-13 22:20:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:20:35,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:20:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:38,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 22:20:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:38,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2022-12-13 22:20:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:38,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 423 [2022-12-13 22:20:38,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 39275 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 35179 trivial. 0 not checked. [2022-12-13 22:20:38,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:20:38,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931309856] [2022-12-13 22:20:38,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931309856] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:20:38,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93187160] [2022-12-13 22:20:38,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 22:20:38,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:38,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:20:38,316 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:20:38,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed71824-3d4e-44a0-8dc5-2ebf8066c608/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process