./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array24_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array24_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 b41c571dabcbc4670dde65107f8da5b879f13435b678b4e9a9cdcc7ef0066cf6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:44:32,834 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:44:32,958 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:44:32,965 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:44:32,966 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:44:33,004 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:44:33,005 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:44:33,005 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:44:33,007 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:44:33,011 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:44:33,012 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:44:33,013 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:44:33,013 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:44:33,015 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:44:33,016 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:44:33,016 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:44:33,017 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:44:33,017 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:44:33,017 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:44:33,018 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:44:33,018 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:44:33,019 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:44:33,019 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:44:33,020 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:44:33,020 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:44:33,021 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:44:33,022 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:44:33,022 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:44:33,023 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:44:33,023 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:44:33,024 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:44:33,025 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:44:33,025 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:44:33,025 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:44:33,026 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:44:33,026 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:44:33,026 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:44:33,026 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:44:33,027 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:44:33,027 INFO L153 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_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b41c571dabcbc4670dde65107f8da5b879f13435b678b4e9a9cdcc7ef0066cf6 [2023-11-19 07:44:33,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:44:33,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:44:33,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:44:33,408 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:44:33,409 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:44:33,410 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/array-patterns/array24_pattern.c [2023-11-19 07:44:36,599 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:44:36,843 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:44:36,844 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/sv-benchmarks/c/array-patterns/array24_pattern.c [2023-11-19 07:44:36,854 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/data/edb5bd8e8/9c68bfaca7bc4cbda99f90cf467033c2/FLAGefd86d5be [2023-11-19 07:44:36,872 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/data/edb5bd8e8/9c68bfaca7bc4cbda99f90cf467033c2 [2023-11-19 07:44:36,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:44:36,877 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:44:36,878 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:36,879 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:44:36,886 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:44:36,887 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:36" (1/1) ... [2023-11-19 07:44:36,888 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15267c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:36, skipping insertion in model container [2023-11-19 07:44:36,889 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:36" (1/1) ... [2023-11-19 07:44:36,918 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:44:37,097 WARN L240 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_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/sv-benchmarks/c/array-patterns/array24_pattern.c[1359,1372] [2023-11-19 07:44:37,126 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:37,137 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:44:37,151 WARN L240 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_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/sv-benchmarks/c/array-patterns/array24_pattern.c[1359,1372] [2023-11-19 07:44:37,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:37,181 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:44:37,182 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:37 WrapperNode [2023-11-19 07:44:37,182 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:37,183 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:37,183 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:44:37,184 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:44:37,192 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:37" (1/1) ... [2023-11-19 07:44:37,218 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:37" (1/1) ... [2023-11-19 07:44:37,258 INFO L138 Inliner]: procedures = 17, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2023-11-19 07:44:37,258 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:37,259 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:44:37,260 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:44:37,260 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:44:37,273 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:37" (1/1) ... [2023-11-19 07:44:37,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:37" (1/1) ... [2023-11-19 07:44:37,282 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:37" (1/1) ... [2023-11-19 07:44:37,282 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:37" (1/1) ... [2023-11-19 07:44:37,304 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:37" (1/1) ... [2023-11-19 07:44:37,309 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:37" (1/1) ... [2023-11-19 07:44:37,311 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:37" (1/1) ... [2023-11-19 07:44:37,324 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:37" (1/1) ... [2023-11-19 07:44:37,327 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:44:37,328 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:44:37,328 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:44:37,328 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:44:37,329 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:37" (1/1) ... [2023-11-19 07:44:37,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:44:37,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:37,374 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:37,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:44:37,427 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2023-11-19 07:44:37,427 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2023-11-19 07:44:37,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:44:37,428 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:44:37,428 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:44:37,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:44:37,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:44:37,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:44:37,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:44:37,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:44:37,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:44:37,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:44:37,542 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:44:37,545 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:44:37,833 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:44:37,844 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:44:37,844 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-19 07:44:37,849 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:37 BoogieIcfgContainer [2023-11-19 07:44:37,849 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:44:37,855 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:44:37,856 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:44:37,860 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:44:37,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:44:36" (1/3) ... [2023-11-19 07:44:37,861 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b9975b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:37, skipping insertion in model container [2023-11-19 07:44:37,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:37" (2/3) ... [2023-11-19 07:44:37,862 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b9975b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:37, skipping insertion in model container [2023-11-19 07:44:37,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:37" (3/3) ... [2023-11-19 07:44:37,864 INFO L112 eAbstractionObserver]: Analyzing ICFG array24_pattern.c [2023-11-19 07:44:37,889 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:44:37,890 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:44:37,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:44:37,970 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=LoopHeads, 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;@58043645, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:44:37,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:44:37,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:44:37,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 07:44:37,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:37,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:37,990 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:38,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:38,009 INFO L85 PathProgramCache]: Analyzing trace with hash 2136211159, now seen corresponding path program 1 times [2023-11-19 07:44:38,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:38,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993125485] [2023-11-19 07:44:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:38,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:38,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:38,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:38,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993125485] [2023-11-19 07:44:38,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:44:38,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402336806] [2023-11-19 07:44:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:38,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:38,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:38,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:38,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:44:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:38,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:44:38,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:38,393 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:38,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402336806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:38,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:38,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:44:38,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949843370] [2023-11-19 07:44:38,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:38,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:44:38,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:38,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:44:38,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:44:38,448 INFO L87 Difference]: Start difference. First operand has 40 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:44:38,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:38,477 INFO L93 Difference]: Finished difference Result 77 states and 115 transitions. [2023-11-19 07:44:38,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:44:38,480 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-19 07:44:38,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:38,489 INFO L225 Difference]: With dead ends: 77 [2023-11-19 07:44:38,489 INFO L226 Difference]: Without dead ends: 36 [2023-11-19 07:44:38,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:44:38,498 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:38,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:44:38,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-19 07:44:38,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-19 07:44:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:44:38,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-11-19 07:44:38,564 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 15 [2023-11-19 07:44:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:38,565 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-11-19 07:44:38,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:44:38,566 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-11-19 07:44:38,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 07:44:38,569 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:38,569 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:38,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:38,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:44:38,793 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:38,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:38,794 INFO L85 PathProgramCache]: Analyzing trace with hash -699940082, now seen corresponding path program 1 times [2023-11-19 07:44:38,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:38,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543924087] [2023-11-19 07:44:38,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:38,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:38,834 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:38,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550129071] [2023-11-19 07:44:38,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:38,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:38,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:38,837 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:38,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:44:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:38,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:44:38,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:44:39,098 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:39,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:39,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543924087] [2023-11-19 07:44:39,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:39,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550129071] [2023-11-19 07:44:39,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550129071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:39,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:39,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:44:39,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7631096] [2023-11-19 07:44:39,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:39,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:44:39,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:39,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:44:39,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:44:39,104 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 07:44:39,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:39,283 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2023-11-19 07:44:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:44:39,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2023-11-19 07:44:39,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:39,288 INFO L225 Difference]: With dead ends: 82 [2023-11-19 07:44:39,289 INFO L226 Difference]: Without dead ends: 48 [2023-11-19 07:44:39,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:44:39,295 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 19 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:39,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 106 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:44:39,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-19 07:44:39,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2023-11-19 07:44:39,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:44:39,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-11-19 07:44:39,321 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 35 [2023-11-19 07:44:39,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:39,323 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-11-19 07:44:39,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 07:44:39,324 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-11-19 07:44:39,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 07:44:39,328 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:39,328 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:39,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:39,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:39,541 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:39,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:39,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1511137102, now seen corresponding path program 1 times [2023-11-19 07:44:39,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:39,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34433098] [2023-11-19 07:44:39,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:39,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:39,582 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:39,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167564591] [2023-11-19 07:44:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:39,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:39,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:39,592 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:39,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:44:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:39,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:44:39,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:44:39,720 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:39,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:39,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34433098] [2023-11-19 07:44:39,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:39,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167564591] [2023-11-19 07:44:39,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167564591] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:39,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:39,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:44:39,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152992276] [2023-11-19 07:44:39,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:39,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:44:39,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:39,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:44:39,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:44:39,725 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 07:44:39,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:39,802 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2023-11-19 07:44:39,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:44:39,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-11-19 07:44:39,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:39,804 INFO L225 Difference]: With dead ends: 73 [2023-11-19 07:44:39,804 INFO L226 Difference]: Without dead ends: 41 [2023-11-19 07:44:39,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:44:39,807 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 29 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:39,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 73 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:44:39,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-19 07:44:39,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2023-11-19 07:44:39,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:44:39,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2023-11-19 07:44:39,818 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 38 [2023-11-19 07:44:39,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:39,819 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2023-11-19 07:44:39,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 07:44:39,819 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2023-11-19 07:44:39,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-19 07:44:39,822 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:39,822 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:39,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:40,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 07:44:40,047 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:40,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:40,048 INFO L85 PathProgramCache]: Analyzing trace with hash -50149008, now seen corresponding path program 1 times [2023-11-19 07:44:40,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:40,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479678430] [2023-11-19 07:44:40,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:40,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:40,088 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:40,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159069740] [2023-11-19 07:44:40,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:40,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:40,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:40,091 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:40,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:44:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:40,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:44:40,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:44:40,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 07:44:40,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:40,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479678430] [2023-11-19 07:44:40,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:40,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159069740] [2023-11-19 07:44:40,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159069740] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:40,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:44:40,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-11-19 07:44:40,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056049124] [2023-11-19 07:44:40,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:40,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:44:40,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:40,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:44:40,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:44:40,476 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:44:40,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:40,645 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2023-11-19 07:44:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:44:40,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 40 [2023-11-19 07:44:40,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:40,654 INFO L225 Difference]: With dead ends: 52 [2023-11-19 07:44:40,654 INFO L226 Difference]: Without dead ends: 48 [2023-11-19 07:44:40,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:44:40,662 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 57 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:40,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 83 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:44:40,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-19 07:44:40,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2023-11-19 07:44:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:44:40,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2023-11-19 07:44:40,686 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 40 [2023-11-19 07:44:40,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:40,687 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2023-11-19 07:44:40,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:44:40,687 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2023-11-19 07:44:40,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 07:44:40,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:40,690 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:40,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:40,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:40,905 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:40,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:40,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1300942485, now seen corresponding path program 1 times [2023-11-19 07:44:40,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:40,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230390118] [2023-11-19 07:44:40,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:40,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:40,927 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:40,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438855405] [2023-11-19 07:44:40,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:40,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:40,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:40,936 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:40,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:44:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:41,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:44:41,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:44:41,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:44:41,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:41,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230390118] [2023-11-19 07:44:41,301 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:41,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438855405] [2023-11-19 07:44:41,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438855405] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:41,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:44:41,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-19 07:44:41,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234293901] [2023-11-19 07:44:41,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:41,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:44:41,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:41,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:44:41,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:44:41,305 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 07:44:41,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:41,619 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2023-11-19 07:44:41,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:44:41,623 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2023-11-19 07:44:41,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:41,625 INFO L225 Difference]: With dead ends: 85 [2023-11-19 07:44:41,625 INFO L226 Difference]: Without dead ends: 50 [2023-11-19 07:44:41,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:44:41,627 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 125 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:41,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 97 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:44:41,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-19 07:44:41,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2023-11-19 07:44:41,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:44:41,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2023-11-19 07:44:41,659 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 45 [2023-11-19 07:44:41,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:41,660 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2023-11-19 07:44:41,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 07:44:41,662 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2023-11-19 07:44:41,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 07:44:41,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:41,664 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:41,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:41,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:41,885 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:41,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:41,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1544610617, now seen corresponding path program 2 times [2023-11-19 07:44:41,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:41,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708241546] [2023-11-19 07:44:41,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:41,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:41,923 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:41,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435373766] [2023-11-19 07:44:41,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:44:41,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:41,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:41,941 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:41,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:44:42,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:44:42,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:42,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:44:42,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 07:44:42,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 07:44:42,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:42,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708241546] [2023-11-19 07:44:42,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:42,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435373766] [2023-11-19 07:44:42,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435373766] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:42,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:44:42,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-19 07:44:42,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920658837] [2023-11-19 07:44:42,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:42,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:44:42,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:42,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:44:42,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:44:42,233 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:44:42,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:42,490 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2023-11-19 07:44:42,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:44:42,491 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 49 [2023-11-19 07:44:42,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:42,494 INFO L225 Difference]: With dead ends: 106 [2023-11-19 07:44:42,494 INFO L226 Difference]: Without dead ends: 74 [2023-11-19 07:44:42,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:44:42,496 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 54 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:42,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 160 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:44:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-19 07:44:42,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2023-11-19 07:44:42,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:44:42,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2023-11-19 07:44:42,514 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 49 [2023-11-19 07:44:42,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:42,514 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2023-11-19 07:44:42,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:44:42,515 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2023-11-19 07:44:42,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 07:44:42,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:42,516 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:42,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:42,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:42,740 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:42,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:42,740 INFO L85 PathProgramCache]: Analyzing trace with hash -725408594, now seen corresponding path program 3 times [2023-11-19 07:44:42,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:42,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274947536] [2023-11-19 07:44:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:42,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:42,758 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:44:42,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539364048] [2023-11-19 07:44:42,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:44:42,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:42,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:42,760 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:42,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:44:43,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-19 07:44:43,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:43,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-19 07:44:43,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:43,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 07:44:43,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-19 07:44:43,728 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-11-19 07:44:43,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2023-11-19 07:44:43,875 INFO L349 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2023-11-19 07:44:43,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2023-11-19 07:44:45,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:44:45,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:44:45,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:44:46,707 INFO L349 Elim1Store]: treesize reduction 756, result has 12.0 percent of original size [2023-11-19 07:44:46,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 5 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 90 case distinctions, treesize of input 134 treesize of output 154 [2023-11-19 07:44:48,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:44:48,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:44:48,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:44:48,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:44:48,488 INFO L349 Elim1Store]: treesize reduction 96, result has 1.0 percent of original size [2023-11-19 07:44:48,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 103 treesize of output 37 [2023-11-19 07:44:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:44:48,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:51,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 170 [2023-11-19 07:44:51,662 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:44:51,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87677 treesize of output 80509 [2023-11-19 07:44:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 07:44:53,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:53,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274947536] [2023-11-19 07:44:53,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:44:53,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539364048] [2023-11-19 07:44:53,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539364048] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:53,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:44:53,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 28] total 60 [2023-11-19 07:44:53,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345453266] [2023-11-19 07:44:53,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:53,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-19 07:44:53,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:53,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-19 07:44:53,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=3023, Unknown=0, NotChecked=0, Total=3540 [2023-11-19 07:44:53,165 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 60 states, 59 states have (on average 1.6610169491525424) internal successors, (98), 58 states have internal predecessors, (98), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 07:45:22,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-19 07:45:22,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:22,804 INFO L93 Difference]: Finished difference Result 367 states and 475 transitions. [2023-11-19 07:45:22,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2023-11-19 07:45:22,806 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.6610169491525424) internal successors, (98), 58 states have internal predecessors, (98), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 63 [2023-11-19 07:45:22,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:22,814 INFO L225 Difference]: With dead ends: 367 [2023-11-19 07:45:22,814 INFO L226 Difference]: Without dead ends: 309 [2023-11-19 07:45:22,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11590 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=5437, Invalid=27505, Unknown=0, NotChecked=0, Total=32942 [2023-11-19 07:45:22,841 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 719 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 2409 mSolverCounterSat, 562 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 2972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 562 IncrementalHoareTripleChecker+Valid, 2409 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:22,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 922 Invalid, 2972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [562 Valid, 2409 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2023-11-19 07:45:22,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-11-19 07:45:22,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 160. [2023-11-19 07:45:22,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 135 states have (on average 1.2222222222222223) internal successors, (165), 135 states have internal predecessors, (165), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (22), 18 states have call predecessors, (22), 18 states have call successors, (22) [2023-11-19 07:45:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 205 transitions. [2023-11-19 07:45:22,938 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 205 transitions. Word has length 63 [2023-11-19 07:45:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:22,952 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 205 transitions. [2023-11-19 07:45:22,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.6610169491525424) internal successors, (98), 58 states have internal predecessors, (98), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 07:45:22,953 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 205 transitions. [2023-11-19 07:45:22,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 07:45:22,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:22,955 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:22,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:23,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:23,159 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:23,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash -506553876, now seen corresponding path program 1 times [2023-11-19 07:45:23,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:23,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159051466] [2023-11-19 07:45:23,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:23,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:23,188 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:23,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942604232] [2023-11-19 07:45:23,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:23,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:23,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:23,192 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:23,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:45:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:23,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:45:23,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-19 07:45:23,314 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:45:23,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:23,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159051466] [2023-11-19 07:45:23,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:23,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942604232] [2023-11-19 07:45:23,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942604232] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:23,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:23,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:45:23,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430260868] [2023-11-19 07:45:23,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:23,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:23,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:23,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:23,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:23,318 INFO L87 Difference]: Start difference. First operand 160 states and 205 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 07:45:23,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:23,406 INFO L93 Difference]: Finished difference Result 204 states and 261 transitions. [2023-11-19 07:45:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:23,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2023-11-19 07:45:23,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:23,410 INFO L225 Difference]: With dead ends: 204 [2023-11-19 07:45:23,410 INFO L226 Difference]: Without dead ends: 165 [2023-11-19 07:45:23,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:23,413 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 1 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:23,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 83 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:45:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-19 07:45:23,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2023-11-19 07:45:23,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 139 states have (on average 1.2158273381294964) internal successors, (169), 139 states have internal predecessors, (169), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (22), 18 states have call predecessors, (22), 18 states have call successors, (22) [2023-11-19 07:45:23,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 209 transitions. [2023-11-19 07:45:23,511 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 209 transitions. Word has length 63 [2023-11-19 07:45:23,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:23,511 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 209 transitions. [2023-11-19 07:45:23,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 07:45:23,512 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 209 transitions. [2023-11-19 07:45:23,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-19 07:45:23,514 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:23,515 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:23,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:23,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:23,731 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:23,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:23,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1297779633, now seen corresponding path program 1 times [2023-11-19 07:45:23,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:23,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779260953] [2023-11-19 07:45:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:23,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:23,759 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:23,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34671002] [2023-11-19 07:45:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:23,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:23,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:23,762 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:23,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:45:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:23,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:45:23,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 17 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-19 07:45:23,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-19 07:45:24,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:24,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779260953] [2023-11-19 07:45:24,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:24,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34671002] [2023-11-19 07:45:24,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34671002] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:24,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:45:24,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-19 07:45:24,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535998364] [2023-11-19 07:45:24,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:24,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:45:24,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:24,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:45:24,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:45:24,047 INFO L87 Difference]: Start difference. First operand 164 states and 209 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:45:24,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:24,496 INFO L93 Difference]: Finished difference Result 479 states and 626 transitions. [2023-11-19 07:45:24,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:45:24,497 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2023-11-19 07:45:24,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:24,501 INFO L225 Difference]: With dead ends: 479 [2023-11-19 07:45:24,501 INFO L226 Difference]: Without dead ends: 332 [2023-11-19 07:45:24,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:45:24,504 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 208 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:24,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 138 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:45:24,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-11-19 07:45:24,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 249. [2023-11-19 07:45:24,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 206 states have (on average 1.203883495145631) internal successors, (248), 207 states have internal predecessors, (248), 31 states have call successors, (31), 10 states have call predecessors, (31), 11 states have return successors, (38), 31 states have call predecessors, (38), 31 states have call successors, (38) [2023-11-19 07:45:24,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 317 transitions. [2023-11-19 07:45:24,617 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 317 transitions. Word has length 67 [2023-11-19 07:45:24,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:24,618 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 317 transitions. [2023-11-19 07:45:24,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:45:24,618 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 317 transitions. [2023-11-19 07:45:24,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-19 07:45:24,621 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:24,621 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:24,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:24,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:24,835 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:24,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:24,836 INFO L85 PathProgramCache]: Analyzing trace with hash -615703001, now seen corresponding path program 1 times [2023-11-19 07:45:24,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:24,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088574903] [2023-11-19 07:45:24,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:24,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:24,853 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:24,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777169336] [2023-11-19 07:45:24,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:24,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:24,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:24,856 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:24,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:45:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:24,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:45:24,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-19 07:45:24,972 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:45:24,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:24,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088574903] [2023-11-19 07:45:24,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:24,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777169336] [2023-11-19 07:45:24,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777169336] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:24,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:24,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:45:24,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803044401] [2023-11-19 07:45:24,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:24,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:45:24,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:24,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:45:24,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:45:24,980 INFO L87 Difference]: Start difference. First operand 249 states and 317 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:45:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:25,127 INFO L93 Difference]: Finished difference Result 470 states and 604 transitions. [2023-11-19 07:45:25,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:45:25,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2023-11-19 07:45:25,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:25,137 INFO L225 Difference]: With dead ends: 470 [2023-11-19 07:45:25,137 INFO L226 Difference]: Without dead ends: 269 [2023-11-19 07:45:25,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:45:25,140 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:25,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 164 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:45:25,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-11-19 07:45:25,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 257. [2023-11-19 07:45:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 214 states have (on average 1.1775700934579438) internal successors, (252), 212 states have internal predecessors, (252), 29 states have call successors, (29), 10 states have call predecessors, (29), 13 states have return successors, (42), 34 states have call predecessors, (42), 29 states have call successors, (42) [2023-11-19 07:45:25,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 323 transitions. [2023-11-19 07:45:25,250 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 323 transitions. Word has length 69 [2023-11-19 07:45:25,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:25,250 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 323 transitions. [2023-11-19 07:45:25,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:45:25,251 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 323 transitions. [2023-11-19 07:45:25,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-19 07:45:25,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:25,253 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:25,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:25,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:25,459 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:25,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:25,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1495587368, now seen corresponding path program 1 times [2023-11-19 07:45:25,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:25,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027547698] [2023-11-19 07:45:25,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:25,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:25,472 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:25,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684844364] [2023-11-19 07:45:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:25,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:25,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:25,474 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:25,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:45:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:25,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:45:25,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-19 07:45:25,595 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:45:25,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:25,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027547698] [2023-11-19 07:45:25,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:25,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684844364] [2023-11-19 07:45:25,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684844364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:25,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:25,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:45:25,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731706101] [2023-11-19 07:45:25,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:25,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:45:25,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:25,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:45:25,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:45:25,598 INFO L87 Difference]: Start difference. First operand 257 states and 323 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 07:45:25,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:25,704 INFO L93 Difference]: Finished difference Result 360 states and 449 transitions. [2023-11-19 07:45:25,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:45:25,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2023-11-19 07:45:25,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:25,707 INFO L225 Difference]: With dead ends: 360 [2023-11-19 07:45:25,707 INFO L226 Difference]: Without dead ends: 246 [2023-11-19 07:45:25,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:45:25,709 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:25,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 168 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:45:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-11-19 07:45:25,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2023-11-19 07:45:25,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 197 states have (on average 1.1725888324873097) internal successors, (231), 193 states have internal predecessors, (231), 25 states have call successors, (25), 9 states have call predecessors, (25), 13 states have return successors, (37), 33 states have call predecessors, (37), 25 states have call successors, (37) [2023-11-19 07:45:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 293 transitions. [2023-11-19 07:45:25,807 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 293 transitions. Word has length 69 [2023-11-19 07:45:25,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:25,808 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 293 transitions. [2023-11-19 07:45:25,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 07:45:25,809 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 293 transitions. [2023-11-19 07:45:25,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-19 07:45:25,810 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:25,811 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:25,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:26,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:45:26,025 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:26,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:26,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1078830605, now seen corresponding path program 2 times [2023-11-19 07:45:26,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:26,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299673981] [2023-11-19 07:45:26,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:26,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:26,038 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:26,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300806037] [2023-11-19 07:45:26,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:45:26,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:26,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:26,040 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:26,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:45:26,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:45:26,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:45:26,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:45:26,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-19 07:45:26,150 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:45:26,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:26,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299673981] [2023-11-19 07:45:26,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:26,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300806037] [2023-11-19 07:45:26,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300806037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:26,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:26,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:45:26,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721361981] [2023-11-19 07:45:26,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:26,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:45:26,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:26,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:45:26,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:45:26,152 INFO L87 Difference]: Start difference. First operand 236 states and 293 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 07:45:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:26,241 INFO L93 Difference]: Finished difference Result 381 states and 476 transitions. [2023-11-19 07:45:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:45:26,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 69 [2023-11-19 07:45:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:26,244 INFO L225 Difference]: With dead ends: 381 [2023-11-19 07:45:26,244 INFO L226 Difference]: Without dead ends: 246 [2023-11-19 07:45:26,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:45:26,246 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:26,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 178 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:45:26,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-11-19 07:45:26,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2023-11-19 07:45:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 197 states have (on average 1.1421319796954315) internal successors, (225), 193 states have internal predecessors, (225), 25 states have call successors, (25), 9 states have call predecessors, (25), 13 states have return successors, (37), 33 states have call predecessors, (37), 25 states have call successors, (37) [2023-11-19 07:45:26,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 287 transitions. [2023-11-19 07:45:26,324 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 287 transitions. Word has length 69 [2023-11-19 07:45:26,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:26,324 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 287 transitions. [2023-11-19 07:45:26,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 07:45:26,325 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 287 transitions. [2023-11-19 07:45:26,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-19 07:45:26,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:26,326 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:26,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:26,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:26,540 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:26,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:26,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1478551406, now seen corresponding path program 4 times [2023-11-19 07:45:26,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:26,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497864268] [2023-11-19 07:45:26,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:26,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:26,552 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:26,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191711471] [2023-11-19 07:45:26,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:45:26,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:26,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:26,554 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:26,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:45:26,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:45:26,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:45:26,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:45:26,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 52 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 07:45:26,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-19 07:45:26,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:26,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497864268] [2023-11-19 07:45:26,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:26,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191711471] [2023-11-19 07:45:26,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191711471] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:26,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:45:26,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-19 07:45:26,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774258238] [2023-11-19 07:45:26,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:26,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:45:26,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:26,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:45:26,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:45:26,943 INFO L87 Difference]: Start difference. First operand 236 states and 287 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:45:27,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:27,411 INFO L93 Difference]: Finished difference Result 278 states and 334 transitions. [2023-11-19 07:45:27,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 07:45:27,411 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 71 [2023-11-19 07:45:27,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:27,414 INFO L225 Difference]: With dead ends: 278 [2023-11-19 07:45:27,414 INFO L226 Difference]: Without dead ends: 274 [2023-11-19 07:45:27,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 126 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2023-11-19 07:45:27,415 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 95 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:27,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 137 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:45:27,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2023-11-19 07:45:27,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 196. [2023-11-19 07:45:27,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 165 states have (on average 1.1333333333333333) internal successors, (187), 165 states have internal predecessors, (187), 17 states have call successors, (17), 9 states have call predecessors, (17), 13 states have return successors, (25), 21 states have call predecessors, (25), 17 states have call successors, (25) [2023-11-19 07:45:27,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 229 transitions. [2023-11-19 07:45:27,502 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 229 transitions. Word has length 71 [2023-11-19 07:45:27,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:27,502 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 229 transitions. [2023-11-19 07:45:27,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:45:27,503 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 229 transitions. [2023-11-19 07:45:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-19 07:45:27,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:27,504 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:27,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:27,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:27,725 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:27,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:27,725 INFO L85 PathProgramCache]: Analyzing trace with hash 947766939, now seen corresponding path program 5 times [2023-11-19 07:45:27,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:27,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534043065] [2023-11-19 07:45:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:27,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:27,738 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:27,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164297951] [2023-11-19 07:45:27,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:45:27,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:27,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:27,740 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:27,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 07:45:27,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-19 07:45:27,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:45:27,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:45:27,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 95 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 07:45:27,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 69 proven. 27 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-19 07:45:28,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:28,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534043065] [2023-11-19 07:45:28,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:28,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164297951] [2023-11-19 07:45:28,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164297951] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:28,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:45:28,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-19 07:45:28,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238875367] [2023-11-19 07:45:28,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:28,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:45:28,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:28,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:45:28,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:45:28,043 INFO L87 Difference]: Start difference. First operand 196 states and 229 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:45:28,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:28,350 INFO L93 Difference]: Finished difference Result 204 states and 236 transitions. [2023-11-19 07:45:28,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:45:28,351 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 76 [2023-11-19 07:45:28,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:28,352 INFO L225 Difference]: With dead ends: 204 [2023-11-19 07:45:28,353 INFO L226 Difference]: Without dead ends: 123 [2023-11-19 07:45:28,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 141 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:45:28,354 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 62 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:28,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 158 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:45:28,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-19 07:45:28,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 85. [2023-11-19 07:45:28,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 74 states have internal predecessors, (85), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 07:45:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2023-11-19 07:45:28,395 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 76 [2023-11-19 07:45:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:28,395 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2023-11-19 07:45:28,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:45:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2023-11-19 07:45:28,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-19 07:45:28,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:28,397 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:28,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:28,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:28,598 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:28,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:28,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1239401189, now seen corresponding path program 6 times [2023-11-19 07:45:28,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:28,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577956740] [2023-11-19 07:45:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:28,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:28,634 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:28,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259016084] [2023-11-19 07:45:28,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:45:28,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:28,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:28,637 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:28,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 07:45:28,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-19 07:45:28,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:45:28,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:45:28,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 91 proven. 29 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-19 07:45:29,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 65 proven. 47 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-19 07:45:29,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:29,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577956740] [2023-11-19 07:45:29,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:29,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259016084] [2023-11-19 07:45:29,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259016084] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:29,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:45:29,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-19 07:45:29,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799646409] [2023-11-19 07:45:29,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:29,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:45:29,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:29,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:45:29,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:45:29,207 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:45:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:29,552 INFO L93 Difference]: Finished difference Result 168 states and 193 transitions. [2023-11-19 07:45:29,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:45:29,553 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 80 [2023-11-19 07:45:29,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:29,554 INFO L225 Difference]: With dead ends: 168 [2023-11-19 07:45:29,554 INFO L226 Difference]: Without dead ends: 110 [2023-11-19 07:45:29,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 144 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:45:29,556 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 119 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:29,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 166 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:45:29,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-19 07:45:29,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 94. [2023-11-19 07:45:29,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 84 states have (on average 1.130952380952381) internal successors, (95), 83 states have internal predecessors, (95), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 07:45:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2023-11-19 07:45:29,604 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 80 [2023-11-19 07:45:29,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:29,605 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2023-11-19 07:45:29,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:45:29,605 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2023-11-19 07:45:29,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-19 07:45:29,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:29,606 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:29,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5a6414-0ab7-4100-be0d-19ef2b9c2fd3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0