./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-p_file-80.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-p_file-80.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme --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 f77e8c9f93ca54d94eb905f2ce3291ad784a62b1b2b1f919a3731c7174a0c943 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:45:15,705 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:45:15,825 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:45:15,836 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:45:15,836 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:45:15,876 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:45:15,877 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:45:15,878 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:45:15,879 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:45:15,879 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:45:15,880 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:45:15,880 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:45:15,883 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:45:15,888 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:45:15,889 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:45:15,890 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:45:15,891 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:45:15,892 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:45:15,893 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:45:15,894 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:45:15,894 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:45:15,895 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:45:15,895 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:45:15,895 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:45:15,896 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:45:15,896 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:45:15,896 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:45:15,897 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:45:15,898 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:45:15,898 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:45:15,900 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:45:15,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:45:15,900 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:45:15,900 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:45:15,901 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:45:15,901 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:45:15,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:45:15,901 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:45:15,901 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:45:15,902 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:45:15,902 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:45:15,902 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:45:15,902 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_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f77e8c9f93ca54d94eb905f2ce3291ad784a62b1b2b1f919a3731c7174a0c943 [2023-11-26 10:45:16,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:45:16,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:45:16,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:45:16,283 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:45:16,284 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:45:16,285 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-p_file-80.i [2023-11-26 10:45:19,518 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:45:19,824 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:45:19,824 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-p_file-80.i [2023-11-26 10:45:19,845 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/data/f1752b25d/49e33ce884884b6c982003a3849be39f/FLAG8e57d116e [2023-11-26 10:45:19,863 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/data/f1752b25d/49e33ce884884b6c982003a3849be39f [2023-11-26 10:45:19,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:45:19,875 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:45:19,880 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:45:19,880 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:45:19,889 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:45:19,890 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:45:19" (1/1) ... [2023-11-26 10:45:19,891 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e5283f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:19, skipping insertion in model container [2023-11-26 10:45:19,892 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:45:19" (1/1) ... [2023-11-26 10:45:19,946 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:45:20,151 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_266139bf-5607-4ef1-883e-50b5800a7d57/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-p_file-80.i[916,929] [2023-11-26 10:45:20,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:45:20,264 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:45:20,281 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_266139bf-5607-4ef1-883e-50b5800a7d57/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-p_file-80.i[916,929] [2023-11-26 10:45:20,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:45:20,396 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:45:20,396 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:20 WrapperNode [2023-11-26 10:45:20,396 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:45:20,398 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:45:20,398 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:45:20,398 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:45:20,407 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:20" (1/1) ... [2023-11-26 10:45:20,427 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:20" (1/1) ... [2023-11-26 10:45:20,528 INFO L138 Inliner]: procedures = 29, calls = 244, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 722 [2023-11-26 10:45:20,528 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:45:20,529 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:45:20,530 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:45:20,530 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:45:20,547 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:20" (1/1) ... [2023-11-26 10:45:20,547 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:20" (1/1) ... [2023-11-26 10:45:20,557 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:20" (1/1) ... [2023-11-26 10:45:20,595 INFO L175 MemorySlicer]: Split 199 memory accesses to 18 slices as follows [2, 3, 11, 8, 12, 13, 6, 14, 5, 22, 22, 14, 16, 8, 8, 3, 23, 9]. 12 percent of accesses are in the largest equivalence class. The 19 initializations are split as follows [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]. The 19 writes are split as follows [0, 1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1]. [2023-11-26 10:45:20,595 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:20" (1/1) ... [2023-11-26 10:45:20,596 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:20" (1/1) ... [2023-11-26 10:45:20,647 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:20" (1/1) ... [2023-11-26 10:45:20,667 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:20" (1/1) ... [2023-11-26 10:45:20,677 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:20" (1/1) ... [2023-11-26 10:45:20,700 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:20" (1/1) ... [2023-11-26 10:45:20,730 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:45:20,731 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:45:20,731 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:45:20,731 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:45:20,733 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:20" (1/1) ... [2023-11-26 10:45:20,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:45:20,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:20,781 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:45:20,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:45:20,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:45:20,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:45:20,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:45:20,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:45:20,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:45:20,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 10:45:20,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-26 10:45:20,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-26 10:45:20,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-11-26 10:45:20,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2023-11-26 10:45:20,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2023-11-26 10:45:20,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2023-11-26 10:45:20,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2023-11-26 10:45:20,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2023-11-26 10:45:20,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#13 [2023-11-26 10:45:20,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#14 [2023-11-26 10:45:20,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#15 [2023-11-26 10:45:20,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#16 [2023-11-26 10:45:20,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#17 [2023-11-26 10:45:20,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#0 [2023-11-26 10:45:20,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#1 [2023-11-26 10:45:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#2 [2023-11-26 10:45:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#3 [2023-11-26 10:45:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#4 [2023-11-26 10:45:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#5 [2023-11-26 10:45:20,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#6 [2023-11-26 10:45:20,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#7 [2023-11-26 10:45:20,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#8 [2023-11-26 10:45:20,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#9 [2023-11-26 10:45:20,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#10 [2023-11-26 10:45:20,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#11 [2023-11-26 10:45:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#12 [2023-11-26 10:45:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#13 [2023-11-26 10:45:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#14 [2023-11-26 10:45:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#15 [2023-11-26 10:45:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#16 [2023-11-26 10:45:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#17 [2023-11-26 10:45:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#0 [2023-11-26 10:45:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#1 [2023-11-26 10:45:20,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#2 [2023-11-26 10:45:20,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#3 [2023-11-26 10:45:20,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#4 [2023-11-26 10:45:20,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#5 [2023-11-26 10:45:20,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#6 [2023-11-26 10:45:20,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#7 [2023-11-26 10:45:20,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#8 [2023-11-26 10:45:20,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#9 [2023-11-26 10:45:20,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#10 [2023-11-26 10:45:20,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#11 [2023-11-26 10:45:20,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#12 [2023-11-26 10:45:20,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#13 [2023-11-26 10:45:20,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#14 [2023-11-26 10:45:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#15 [2023-11-26 10:45:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#16 [2023-11-26 10:45:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#17 [2023-11-26 10:45:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:45:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:45:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:45:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:45:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 10:45:20,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-26 10:45:20,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-26 10:45:20,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-11-26 10:45:20,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2023-11-26 10:45:20,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2023-11-26 10:45:20,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2023-11-26 10:45:20,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2023-11-26 10:45:20,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2023-11-26 10:45:20,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#13 [2023-11-26 10:45:20,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#14 [2023-11-26 10:45:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#15 [2023-11-26 10:45:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#16 [2023-11-26 10:45:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#17 [2023-11-26 10:45:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#0 [2023-11-26 10:45:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#1 [2023-11-26 10:45:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#2 [2023-11-26 10:45:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#3 [2023-11-26 10:45:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#4 [2023-11-26 10:45:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#5 [2023-11-26 10:45:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#6 [2023-11-26 10:45:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#7 [2023-11-26 10:45:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#8 [2023-11-26 10:45:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#9 [2023-11-26 10:45:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#10 [2023-11-26 10:45:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#11 [2023-11-26 10:45:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#12 [2023-11-26 10:45:20,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#13 [2023-11-26 10:45:20,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#14 [2023-11-26 10:45:20,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#15 [2023-11-26 10:45:20,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#16 [2023-11-26 10:45:20,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#17 [2023-11-26 10:45:20,883 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 10:45:20,883 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 10:45:20,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:45:20,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:45:20,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:45:20,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:45:20,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 10:45:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-26 10:45:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-26 10:45:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-26 10:45:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-26 10:45:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-11-26 10:45:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-11-26 10:45:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-11-26 10:45:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2023-11-26 10:45:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#13 [2023-11-26 10:45:20,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#14 [2023-11-26 10:45:20,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#15 [2023-11-26 10:45:20,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#16 [2023-11-26 10:45:20,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#17 [2023-11-26 10:45:20,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:45:20,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:45:21,271 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:45:21,274 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:45:22,231 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:45:22,406 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:45:22,421 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:45:22,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:45:22 BoogieIcfgContainer [2023-11-26 10:45:22,422 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:45:22,426 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:45:22,428 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:45:22,432 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:45:22,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:45:19" (1/3) ... [2023-11-26 10:45:22,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad8ed8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:45:22, skipping insertion in model container [2023-11-26 10:45:22,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:20" (2/3) ... [2023-11-26 10:45:22,456 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad8ed8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:45:22, skipping insertion in model container [2023-11-26 10:45:22,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:45:22" (3/3) ... [2023-11-26 10:45:22,458 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_variablewrapping_wrapper-p_file-80.i [2023-11-26 10:45:22,491 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:45:22,491 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:45:22,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:45:22,576 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;@5d57bd4b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:45:22,576 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:45:22,584 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 127 states have (on average 1.4803149606299213) internal successors, (188), 128 states have internal predecessors, (188), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-26 10:45:22,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-26 10:45:22,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:22,606 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:22,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:22,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:22,613 INFO L85 PathProgramCache]: Analyzing trace with hash 206751335, now seen corresponding path program 1 times [2023-11-26 10:45:22,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:22,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870353026] [2023-11-26 10:45:22,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:22,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:23,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:23,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870353026] [2023-11-26 10:45:23,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 10:45:23,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559973441] [2023-11-26 10:45:23,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:23,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:23,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:23,046 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:23,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:45:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:23,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 10:45:23,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2023-11-26 10:45:23,625 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:23,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559973441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:23,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:23,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:45:23,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304841380] [2023-11-26 10:45:23,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:23,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:45:23,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:23,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:45:23,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:45:23,682 INFO L87 Difference]: Start difference. First operand has 147 states, 127 states have (on average 1.4803149606299213) internal successors, (188), 128 states have internal predecessors, (188), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-26 10:45:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:23,792 INFO L93 Difference]: Finished difference Result 291 states and 459 transitions. [2023-11-26 10:45:23,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:45:23,795 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 2 states have call successors, (17) Word has length 148 [2023-11-26 10:45:23,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:23,838 INFO L225 Difference]: With dead ends: 291 [2023-11-26 10:45:23,839 INFO L226 Difference]: Without dead ends: 145 [2023-11-26 10:45:23,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:45:23,848 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:23,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 213 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:45:23,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-26 10:45:23,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-26 10:45:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 126 states have (on average 1.4523809523809523) internal successors, (183), 126 states have internal predecessors, (183), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-26 10:45:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 217 transitions. [2023-11-26 10:45:23,921 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 217 transitions. Word has length 148 [2023-11-26 10:45:23,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:23,922 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 217 transitions. [2023-11-26 10:45:23,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-26 10:45:23,923 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 217 transitions. [2023-11-26 10:45:23,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-26 10:45:23,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:23,934 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:23,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:24,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 10:45:24,143 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:24,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:24,144 INFO L85 PathProgramCache]: Analyzing trace with hash 953343569, now seen corresponding path program 1 times [2023-11-26 10:45:24,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:24,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373381267] [2023-11-26 10:45:24,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:24,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:24,323 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:24,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096436495] [2023-11-26 10:45:24,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:24,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:24,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:24,331 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:24,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:45:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:24,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:45:24,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-26 10:45:24,826 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:24,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:24,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373381267] [2023-11-26 10:45:24,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:24,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096436495] [2023-11-26 10:45:24,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096436495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:24,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:24,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:45:24,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507953143] [2023-11-26 10:45:24,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:24,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:45:24,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:24,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:45:24,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:45:24,833 INFO L87 Difference]: Start difference. First operand 145 states and 217 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-26 10:45:24,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:24,928 INFO L93 Difference]: Finished difference Result 295 states and 442 transitions. [2023-11-26 10:45:24,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:45:24,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 148 [2023-11-26 10:45:24,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:24,936 INFO L225 Difference]: With dead ends: 295 [2023-11-26 10:45:24,936 INFO L226 Difference]: Without dead ends: 151 [2023-11-26 10:45:24,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:45:24,938 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 10 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:24,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 632 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:24,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-26 10:45:24,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2023-11-26 10:45:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 128 states have (on average 1.4453125) internal successors, (185), 128 states have internal predecessors, (185), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-26 10:45:24,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 219 transitions. [2023-11-26 10:45:24,958 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 219 transitions. Word has length 148 [2023-11-26 10:45:24,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:24,959 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 219 transitions. [2023-11-26 10:45:24,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-26 10:45:24,960 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 219 transitions. [2023-11-26 10:45:24,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-26 10:45:24,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:24,963 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:24,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:25,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:25,167 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:25,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:25,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1797349071, now seen corresponding path program 1 times [2023-11-26 10:45:25,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:25,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372358646] [2023-11-26 10:45:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:25,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:25,297 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:25,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336340237] [2023-11-26 10:45:25,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:25,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:25,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:25,306 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:25,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:45:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:25,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:45:25,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-26 10:45:25,726 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:25,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:25,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372358646] [2023-11-26 10:45:25,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:25,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336340237] [2023-11-26 10:45:25,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336340237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:25,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:25,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:45:25,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233074806] [2023-11-26 10:45:25,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:25,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:45:25,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:25,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:45:25,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:45:25,730 INFO L87 Difference]: Start difference. First operand 147 states and 219 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:25,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:25,783 INFO L93 Difference]: Finished difference Result 305 states and 454 transitions. [2023-11-26 10:45:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:45:25,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 148 [2023-11-26 10:45:25,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:25,787 INFO L225 Difference]: With dead ends: 305 [2023-11-26 10:45:25,787 INFO L226 Difference]: Without dead ends: 159 [2023-11-26 10:45:25,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:45:25,790 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 21 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:25,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 630 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:45:25,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-26 10:45:25,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 149. [2023-11-26 10:45:25,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 130 states have (on average 1.4384615384615385) internal successors, (187), 130 states have internal predecessors, (187), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-26 10:45:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 221 transitions. [2023-11-26 10:45:25,806 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 221 transitions. Word has length 148 [2023-11-26 10:45:25,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:25,807 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 221 transitions. [2023-11-26 10:45:25,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:25,807 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 221 transitions. [2023-11-26 10:45:25,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-26 10:45:25,810 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:25,810 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:25,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:26,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:26,018 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:26,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:26,019 INFO L85 PathProgramCache]: Analyzing trace with hash 988002445, now seen corresponding path program 1 times [2023-11-26 10:45:26,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:26,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410324123] [2023-11-26 10:45:26,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:26,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:26,105 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:26,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080043263] [2023-11-26 10:45:26,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:26,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:26,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:26,107 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:26,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:45:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:26,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:45:26,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-26 10:45:26,558 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:26,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:26,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410324123] [2023-11-26 10:45:26,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:26,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080043263] [2023-11-26 10:45:26,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080043263] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:26,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:26,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:45:26,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162592198] [2023-11-26 10:45:26,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:26,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:45:26,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:26,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:45:26,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:45:26,562 INFO L87 Difference]: Start difference. First operand 149 states and 221 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:26,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:26,614 INFO L93 Difference]: Finished difference Result 305 states and 452 transitions. [2023-11-26 10:45:26,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:45:26,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 148 [2023-11-26 10:45:26,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:26,618 INFO L225 Difference]: With dead ends: 305 [2023-11-26 10:45:26,618 INFO L226 Difference]: Without dead ends: 157 [2023-11-26 10:45:26,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:45:26,620 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 12 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:26,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 628 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:45:26,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-26 10:45:26,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 151. [2023-11-26 10:45:26,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 132 states have (on average 1.4318181818181819) internal successors, (189), 132 states have internal predecessors, (189), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-26 10:45:26,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 223 transitions. [2023-11-26 10:45:26,636 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 223 transitions. Word has length 148 [2023-11-26 10:45:26,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:26,637 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 223 transitions. [2023-11-26 10:45:26,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:26,638 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 223 transitions. [2023-11-26 10:45:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-26 10:45:26,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:26,641 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:26,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:26,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:26,850 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:26,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:26,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1045260747, now seen corresponding path program 1 times [2023-11-26 10:45:26,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:26,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441429949] [2023-11-26 10:45:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:26,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:26,924 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:26,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63563572] [2023-11-26 10:45:26,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:26,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:26,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:26,937 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:26,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:45:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:27,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:45:27,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-26 10:45:27,348 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:27,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:27,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441429949] [2023-11-26 10:45:27,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:27,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63563572] [2023-11-26 10:45:27,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63563572] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:27,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:27,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:45:27,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579348588] [2023-11-26 10:45:27,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:27,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:45:27,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:27,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:45:27,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:45:27,353 INFO L87 Difference]: Start difference. First operand 151 states and 223 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:27,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:27,407 INFO L93 Difference]: Finished difference Result 305 states and 450 transitions. [2023-11-26 10:45:27,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:45:27,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 148 [2023-11-26 10:45:27,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:27,410 INFO L225 Difference]: With dead ends: 305 [2023-11-26 10:45:27,410 INFO L226 Difference]: Without dead ends: 155 [2023-11-26 10:45:27,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:45:27,412 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 3 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:27,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 628 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:45:27,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-26 10:45:27,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2023-11-26 10:45:27,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 134 states have (on average 1.4253731343283582) internal successors, (191), 134 states have internal predecessors, (191), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-26 10:45:27,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 225 transitions. [2023-11-26 10:45:27,427 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 225 transitions. Word has length 148 [2023-11-26 10:45:27,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:27,428 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 225 transitions. [2023-11-26 10:45:27,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:27,428 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 225 transitions. [2023-11-26 10:45:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-26 10:45:27,431 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:27,431 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:27,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:27,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:27,647 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:27,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:27,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1045320329, now seen corresponding path program 1 times [2023-11-26 10:45:27,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:27,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130561555] [2023-11-26 10:45:27,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:27,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:27,765 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:27,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014982675] [2023-11-26 10:45:27,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:27,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:27,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:27,770 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:27,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:45:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:28,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:45:28,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-26 10:45:28,251 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:28,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:28,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130561555] [2023-11-26 10:45:28,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:28,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014982675] [2023-11-26 10:45:28,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014982675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:28,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:28,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:45:28,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289633842] [2023-11-26 10:45:28,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:28,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:45:28,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:28,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:45:28,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:45:28,256 INFO L87 Difference]: Start difference. First operand 153 states and 225 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:28,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:28,321 INFO L93 Difference]: Finished difference Result 346 states and 508 transitions. [2023-11-26 10:45:28,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:45:28,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 148 [2023-11-26 10:45:28,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:28,324 INFO L225 Difference]: With dead ends: 346 [2023-11-26 10:45:28,325 INFO L226 Difference]: Without dead ends: 194 [2023-11-26 10:45:28,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:45:28,328 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 66 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:28,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 701 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:45:28,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-11-26 10:45:28,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 155. [2023-11-26 10:45:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 136 states have (on average 1.4191176470588236) internal successors, (193), 136 states have internal predecessors, (193), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-26 10:45:28,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 227 transitions. [2023-11-26 10:45:28,354 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 227 transitions. Word has length 148 [2023-11-26 10:45:28,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:28,355 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 227 transitions. [2023-11-26 10:45:28,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:28,356 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 227 transitions. [2023-11-26 10:45:28,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-26 10:45:28,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:28,358 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:28,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:28,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 10:45:28,567 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:28,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:28,567 INFO L85 PathProgramCache]: Analyzing trace with hash -675206354, now seen corresponding path program 1 times [2023-11-26 10:45:28,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:28,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446640203] [2023-11-26 10:45:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:28,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:28,627 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:28,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957937974] [2023-11-26 10:45:28,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:28,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:28,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:28,629 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:28,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:45:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:29,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 10:45:29,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-26 10:45:29,081 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:29,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:29,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446640203] [2023-11-26 10:45:29,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:29,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957937974] [2023-11-26 10:45:29,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957937974] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:29,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:29,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:45:29,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320812638] [2023-11-26 10:45:29,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:29,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:45:29,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:29,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:45:29,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:45:29,085 INFO L87 Difference]: Start difference. First operand 155 states and 227 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:29,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:29,124 INFO L93 Difference]: Finished difference Result 313 states and 460 transitions. [2023-11-26 10:45:29,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:45:29,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 150 [2023-11-26 10:45:29,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:29,127 INFO L225 Difference]: With dead ends: 313 [2023-11-26 10:45:29,128 INFO L226 Difference]: Without dead ends: 159 [2023-11-26 10:45:29,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:45:29,129 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 1 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:29,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 420 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:45:29,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-26 10:45:29,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2023-11-26 10:45:29,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 139 states have (on average 1.4172661870503598) internal successors, (197), 139 states have internal predecessors, (197), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-26 10:45:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 231 transitions. [2023-11-26 10:45:29,139 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 231 transitions. Word has length 150 [2023-11-26 10:45:29,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:29,140 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 231 transitions. [2023-11-26 10:45:29,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:29,141 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 231 transitions. [2023-11-26 10:45:29,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-26 10:45:29,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:29,144 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:29,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-26 10:45:29,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 10:45:29,356 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:29,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:29,356 INFO L85 PathProgramCache]: Analyzing trace with hash -456351636, now seen corresponding path program 1 times [2023-11-26 10:45:29,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:29,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684757518] [2023-11-26 10:45:29,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:29,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:29,438 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:29,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924631094] [2023-11-26 10:45:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:29,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:29,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:29,441 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:29,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:45:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:29,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-26 10:45:29,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:30,378 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 15 treesize of output 1 [2023-11-26 10:45:30,720 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 15 treesize of output 11 [2023-11-26 10:45:30,751 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 15 treesize of output 11 [2023-11-26 10:45:30,755 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 30 treesize of output 18 [2023-11-26 10:45:30,796 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 19 treesize of output 11 [2023-11-26 10:45:30,807 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 15 treesize of output 7 [2023-11-26 10:45:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 7 proven. 309 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2023-11-26 10:45:30,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:31,137 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 32 treesize of output 28 [2023-11-26 10:45:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-11-26 10:45:31,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:31,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684757518] [2023-11-26 10:45:31,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:31,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924631094] [2023-11-26 10:45:31,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924631094] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:31,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:45:31,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2023-11-26 10:45:31,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432334483] [2023-11-26 10:45:31,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:31,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 10:45:31,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:31,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 10:45:31,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-11-26 10:45:31,269 INFO L87 Difference]: Start difference. First operand 158 states and 231 transitions. Second operand has 18 states, 16 states have (on average 7.625) internal successors, (122), 17 states have internal predecessors, (122), 6 states have call successors, (34), 4 states have call predecessors, (34), 5 states have return successors, (34), 4 states have call predecessors, (34), 6 states have call successors, (34) [2023-11-26 10:45:33,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:33,325 INFO L93 Difference]: Finished difference Result 567 states and 815 transitions. [2023-11-26 10:45:33,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-26 10:45:33,326 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 7.625) internal successors, (122), 17 states have internal predecessors, (122), 6 states have call successors, (34), 4 states have call predecessors, (34), 5 states have return successors, (34), 4 states have call predecessors, (34), 6 states have call successors, (34) Word has length 150 [2023-11-26 10:45:33,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:33,330 INFO L225 Difference]: With dead ends: 567 [2023-11-26 10:45:33,330 INFO L226 Difference]: Without dead ends: 410 [2023-11-26 10:45:33,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=639, Invalid=2117, Unknown=0, NotChecked=0, Total=2756 [2023-11-26 10:45:33,335 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 1301 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1301 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:33,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1301 Valid, 1506 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 10:45:33,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-11-26 10:45:33,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 261. [2023-11-26 10:45:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 221 states have (on average 1.3891402714932126) internal successors, (307), 222 states have internal predecessors, (307), 34 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-26 10:45:33,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 375 transitions. [2023-11-26 10:45:33,375 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 375 transitions. Word has length 150 [2023-11-26 10:45:33,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:33,376 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 375 transitions. [2023-11-26 10:45:33,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 7.625) internal successors, (122), 17 states have internal predecessors, (122), 6 states have call successors, (34), 4 states have call predecessors, (34), 5 states have return successors, (34), 4 states have call predecessors, (34), 6 states have call successors, (34) [2023-11-26 10:45:33,376 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 375 transitions. [2023-11-26 10:45:33,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-26 10:45:33,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:33,379 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:33,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:33,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:33,587 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:33,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:33,588 INFO L85 PathProgramCache]: Analyzing trace with hash -809219860, now seen corresponding path program 1 times [2023-11-26 10:45:33,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:33,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593056770] [2023-11-26 10:45:33,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:33,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:33,670 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:33,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911876523] [2023-11-26 10:45:33,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:33,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:33,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:33,672 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:33,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:45:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:34,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:45:34,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:34,170 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 15 treesize of output 7 [2023-11-26 10:45:34,175 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 15 treesize of output 7 [2023-11-26 10:45:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-26 10:45:34,188 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:34,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:34,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593056770] [2023-11-26 10:45:34,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:34,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911876523] [2023-11-26 10:45:34,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911876523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:34,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:34,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:45:34,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181911492] [2023-11-26 10:45:34,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:34,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:45:34,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:34,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:45:34,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:45:34,191 INFO L87 Difference]: Start difference. First operand 261 states and 375 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:34,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:34,460 INFO L93 Difference]: Finished difference Result 585 states and 838 transitions. [2023-11-26 10:45:34,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:45:34,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 150 [2023-11-26 10:45:34,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:34,466 INFO L225 Difference]: With dead ends: 585 [2023-11-26 10:45:34,467 INFO L226 Difference]: Without dead ends: 399 [2023-11-26 10:45:34,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:45:34,468 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 235 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:34,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 1357 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:45:34,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2023-11-26 10:45:34,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 264. [2023-11-26 10:45:34,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 224 states have (on average 1.3883928571428572) internal successors, (311), 225 states have internal predecessors, (311), 34 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-26 10:45:34,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 379 transitions. [2023-11-26 10:45:34,498 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 379 transitions. Word has length 150 [2023-11-26 10:45:34,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:34,499 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 379 transitions. [2023-11-26 10:45:34,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:34,499 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 379 transitions. [2023-11-26 10:45:34,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-26 10:45:34,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:34,502 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:34,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:34,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:34,711 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:34,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:34,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1796803694, now seen corresponding path program 1 times [2023-11-26 10:45:34,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:34,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600681550] [2023-11-26 10:45:34,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:34,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:34,779 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:34,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221971663] [2023-11-26 10:45:34,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:34,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:34,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:34,781 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:34,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:45:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:35,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 10:45:35,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:35,388 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 15 treesize of output 7 [2023-11-26 10:45:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-26 10:45:35,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:35,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:35,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600681550] [2023-11-26 10:45:35,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:35,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221971663] [2023-11-26 10:45:35,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221971663] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:35,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:35,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 10:45:35,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433932014] [2023-11-26 10:45:35,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:35,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:45:35,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:35,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:45:35,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:45:35,422 INFO L87 Difference]: Start difference. First operand 264 states and 379 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:35,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:35,726 INFO L93 Difference]: Finished difference Result 630 states and 901 transitions. [2023-11-26 10:45:35,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:45:35,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 150 [2023-11-26 10:45:35,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:35,733 INFO L225 Difference]: With dead ends: 630 [2023-11-26 10:45:35,734 INFO L226 Difference]: Without dead ends: 441 [2023-11-26 10:45:35,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:45:35,735 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 294 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:35,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 1474 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:45:35,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-11-26 10:45:35,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 267. [2023-11-26 10:45:35,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 227 states have (on average 1.3876651982378854) internal successors, (315), 228 states have internal predecessors, (315), 34 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-26 10:45:35,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 383 transitions. [2023-11-26 10:45:35,774 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 383 transitions. Word has length 150 [2023-11-26 10:45:35,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:35,775 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 383 transitions. [2023-11-26 10:45:35,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:35,775 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 383 transitions. [2023-11-26 10:45:35,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-26 10:45:35,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:35,778 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:35,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:35,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:35,986 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:35,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:35,987 INFO L85 PathProgramCache]: Analyzing trace with hash 208455792, now seen corresponding path program 1 times [2023-11-26 10:45:35,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:35,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187689527] [2023-11-26 10:45:35,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:35,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:36,041 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:36,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90703327] [2023-11-26 10:45:36,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:36,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:36,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:36,043 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:36,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:45:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:36,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-26 10:45:36,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:36,526 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 15 treesize of output 1 [2023-11-26 10:45:36,536 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 27 treesize of output 19 [2023-11-26 10:45:36,541 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 15 treesize of output 1 [2023-11-26 10:45:36,560 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 19 treesize of output 11 [2023-11-26 10:45:36,912 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 28 treesize of output 16 [2023-11-26 10:45:36,919 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 17 treesize of output 9 [2023-11-26 10:45:36,927 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 15 treesize of output 7 [2023-11-26 10:45:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-26 10:45:36,973 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:36,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:36,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187689527] [2023-11-26 10:45:36,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:36,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90703327] [2023-11-26 10:45:36,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90703327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:36,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:36,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 10:45:36,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633333511] [2023-11-26 10:45:36,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:36,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:45:36,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:36,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:45:36,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:45:36,977 INFO L87 Difference]: Start difference. First operand 267 states and 383 transitions. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:37,978 INFO L93 Difference]: Finished difference Result 649 states and 924 transitions. [2023-11-26 10:45:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:45:37,979 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 150 [2023-11-26 10:45:37,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:37,984 INFO L225 Difference]: With dead ends: 649 [2023-11-26 10:45:37,984 INFO L226 Difference]: Without dead ends: 457 [2023-11-26 10:45:37,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:45:37,986 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 601 mSDsluCounter, 1772 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 2103 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:37,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 2103 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 10:45:37,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2023-11-26 10:45:38,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 274. [2023-11-26 10:45:38,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 234 states have (on average 1.3846153846153846) internal successors, (324), 235 states have internal predecessors, (324), 34 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-26 10:45:38,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 392 transitions. [2023-11-26 10:45:38,017 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 392 transitions. Word has length 150 [2023-11-26 10:45:38,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:38,018 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 392 transitions. [2023-11-26 10:45:38,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:38,018 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 392 transitions. [2023-11-26 10:45:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-26 10:45:38,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:38,021 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:38,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:38,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:38,231 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:38,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:38,232 INFO L85 PathProgramCache]: Analyzing trace with hash -590365142, now seen corresponding path program 1 times [2023-11-26 10:45:38,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:38,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368917795] [2023-11-26 10:45:38,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:38,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:38,314 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:38,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702264878] [2023-11-26 10:45:38,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:38,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:38,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:38,316 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:38,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:45:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:38,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 10:45:38,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:38,873 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 15 treesize of output 7 [2023-11-26 10:45:38,878 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 15 treesize of output 7 [2023-11-26 10:45:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-26 10:45:38,891 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:38,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:38,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368917795] [2023-11-26 10:45:38,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:38,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702264878] [2023-11-26 10:45:38,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702264878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:38,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:38,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:45:38,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780993351] [2023-11-26 10:45:38,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:38,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:45:38,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:38,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:45:38,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:45:38,895 INFO L87 Difference]: Start difference. First operand 274 states and 392 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:39,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:39,125 INFO L93 Difference]: Finished difference Result 612 states and 873 transitions. [2023-11-26 10:45:39,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:45:39,126 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 150 [2023-11-26 10:45:39,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:39,130 INFO L225 Difference]: With dead ends: 612 [2023-11-26 10:45:39,130 INFO L226 Difference]: Without dead ends: 413 [2023-11-26 10:45:39,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:45:39,131 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 247 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:39,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 754 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:45:39,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2023-11-26 10:45:39,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 279. [2023-11-26 10:45:39,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 239 states have (on average 1.3849372384937237) internal successors, (331), 240 states have internal predecessors, (331), 34 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-26 10:45:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 399 transitions. [2023-11-26 10:45:39,157 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 399 transitions. Word has length 150 [2023-11-26 10:45:39,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:39,158 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 399 transitions. [2023-11-26 10:45:39,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:39,158 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 399 transitions. [2023-11-26 10:45:39,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-26 10:45:39,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:39,160 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:39,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:39,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:39,374 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:39,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:39,374 INFO L85 PathProgramCache]: Analyzing trace with hash 2015658412, now seen corresponding path program 1 times [2023-11-26 10:45:39,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:39,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252245142] [2023-11-26 10:45:39,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:39,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:39,430 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:39,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936409585] [2023-11-26 10:45:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:39,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:39,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:39,432 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:39,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 10:45:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:39,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-26 10:45:39,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:39,998 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 15 treesize of output 1 [2023-11-26 10:45:40,638 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 15 treesize of output 1 [2023-11-26 10:45:40,696 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 27 treesize of output 19 [2023-11-26 10:45:40,704 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 15 treesize of output 1 [2023-11-26 10:45:41,176 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 38 treesize of output 26 [2023-11-26 10:45:41,240 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 35 treesize of output 23 [2023-11-26 10:45:41,246 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 31 treesize of output 19 [2023-11-26 10:45:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 14 proven. 162 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2023-11-26 10:45:41,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:43,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:43,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252245142] [2023-11-26 10:45:43,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:43,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936409585] [2023-11-26 10:45:43,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936409585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:43,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:45:43,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-26 10:45:43,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107668116] [2023-11-26 10:45:43,755 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:43,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 10:45:43,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:43,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 10:45:43,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2023-11-26 10:45:43,758 INFO L87 Difference]: Start difference. First operand 279 states and 399 transitions. Second operand has 17 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-26 10:45:47,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:47,271 INFO L93 Difference]: Finished difference Result 651 states and 918 transitions. [2023-11-26 10:45:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 10:45:47,272 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 150 [2023-11-26 10:45:47,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:47,275 INFO L225 Difference]: With dead ends: 651 [2023-11-26 10:45:47,275 INFO L226 Difference]: Without dead ends: 447 [2023-11-26 10:45:47,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2023-11-26 10:45:47,278 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 984 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 1846 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:47,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 1846 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-26 10:45:47,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2023-11-26 10:45:47,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 287. [2023-11-26 10:45:47,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 245 states have (on average 1.3755102040816327) internal successors, (337), 246 states have internal predecessors, (337), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-26 10:45:47,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 405 transitions. [2023-11-26 10:45:47,307 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 405 transitions. Word has length 150 [2023-11-26 10:45:47,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:47,308 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 405 transitions. [2023-11-26 10:45:47,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-26 10:45:47,308 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 405 transitions. [2023-11-26 10:45:47,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-26 10:45:47,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:47,310 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:47,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:47,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:47,519 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:47,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:47,519 INFO L85 PathProgramCache]: Analyzing trace with hash 427310510, now seen corresponding path program 1 times [2023-11-26 10:45:47,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:47,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906506743] [2023-11-26 10:45:47,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:47,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:47,564 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:47,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218025627] [2023-11-26 10:45:47,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:47,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:47,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:47,566 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:47,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 10:45:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:48,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-26 10:45:48,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:48,081 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 15 treesize of output 1 [2023-11-26 10:45:48,090 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 27 treesize of output 19 [2023-11-26 10:45:48,094 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 15 treesize of output 1 [2023-11-26 10:45:48,118 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 15 treesize of output 7 [2023-11-26 10:45:48,398 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 45 treesize of output 29 [2023-11-26 10:45:48,495 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 87 treesize of output 63 [2023-11-26 10:45:48,499 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 60 treesize of output 36 [2023-11-26 10:45:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-26 10:45:48,658 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:48,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:48,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906506743] [2023-11-26 10:45:48,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:48,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218025627] [2023-11-26 10:45:48,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218025627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:48,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:48,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 10:45:48,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326032617] [2023-11-26 10:45:48,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:48,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:45:48,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:48,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:45:48,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:45:48,662 INFO L87 Difference]: Start difference. First operand 287 states and 405 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:53,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-26 10:45:54,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:54,342 INFO L93 Difference]: Finished difference Result 729 states and 1023 transitions. [2023-11-26 10:45:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:45:54,343 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 150 [2023-11-26 10:45:54,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:54,348 INFO L225 Difference]: With dead ends: 729 [2023-11-26 10:45:54,348 INFO L226 Difference]: Without dead ends: 521 [2023-11-26 10:45:54,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-11-26 10:45:54,349 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 615 mSDsluCounter, 1800 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:54,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 2188 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 504 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2023-11-26 10:45:54,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2023-11-26 10:45:54,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 292. [2023-11-26 10:45:54,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 250 states have (on average 1.376) internal successors, (344), 251 states have internal predecessors, (344), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-26 10:45:54,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 412 transitions. [2023-11-26 10:45:54,384 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 412 transitions. Word has length 150 [2023-11-26 10:45:54,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:54,384 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 412 transitions. [2023-11-26 10:45:54,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:54,385 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 412 transitions. [2023-11-26 10:45:54,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-26 10:45:54,386 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:54,387 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:54,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:54,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:54,597 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:54,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:54,598 INFO L85 PathProgramCache]: Analyzing trace with hash 232825485, now seen corresponding path program 1 times [2023-11-26 10:45:54,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:54,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614441850] [2023-11-26 10:45:54,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:54,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:54,646 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:54,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833694319] [2023-11-26 10:45:54,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:54,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:54,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:54,648 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:54,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 10:45:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:55,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:45:55,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-26 10:45:55,091 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:55,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:55,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614441850] [2023-11-26 10:45:55,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:55,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833694319] [2023-11-26 10:45:55,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833694319] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:55,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:55,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:45:55,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915735627] [2023-11-26 10:45:55,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:55,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:45:55,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:55,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:45:55,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:55,094 INFO L87 Difference]: Start difference. First operand 292 states and 412 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:55,139 INFO L93 Difference]: Finished difference Result 541 states and 764 transitions. [2023-11-26 10:45:55,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:45:55,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 151 [2023-11-26 10:45:55,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:55,142 INFO L225 Difference]: With dead ends: 541 [2023-11-26 10:45:55,142 INFO L226 Difference]: Without dead ends: 328 [2023-11-26 10:45:55,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:55,144 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 46 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:55,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 458 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:45:55,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-11-26 10:45:55,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 293. [2023-11-26 10:45:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 251 states have (on average 1.3745019920318724) internal successors, (345), 252 states have internal predecessors, (345), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-26 10:45:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 413 transitions. [2023-11-26 10:45:55,179 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 413 transitions. Word has length 151 [2023-11-26 10:45:55,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:55,180 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 413 transitions. [2023-11-26 10:45:55,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:55,180 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 413 transitions. [2023-11-26 10:45:55,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-26 10:45:55,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:55,184 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:55,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:55,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:55,393 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:55,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:55,393 INFO L85 PathProgramCache]: Analyzing trace with hash -778291765, now seen corresponding path program 1 times [2023-11-26 10:45:55,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:55,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853841631] [2023-11-26 10:45:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:55,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:55,460 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:55,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424098908] [2023-11-26 10:45:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:55,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:55,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:55,462 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:55,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-26 10:45:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:55,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 10:45:55,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:55,950 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 15 treesize of output 11 [2023-11-26 10:45:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-26 10:45:56,018 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:56,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:56,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853841631] [2023-11-26 10:45:56,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:56,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424098908] [2023-11-26 10:45:56,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424098908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:56,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:56,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:45:56,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423712077] [2023-11-26 10:45:56,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:56,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:45:56,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:56,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:45:56,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:45:56,021 INFO L87 Difference]: Start difference. First operand 293 states and 413 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:56,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:56,226 INFO L93 Difference]: Finished difference Result 625 states and 876 transitions. [2023-11-26 10:45:56,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:45:56,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 151 [2023-11-26 10:45:56,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:56,230 INFO L225 Difference]: With dead ends: 625 [2023-11-26 10:45:56,230 INFO L226 Difference]: Without dead ends: 411 [2023-11-26 10:45:56,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:45:56,232 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 308 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:56,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 1201 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:56,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2023-11-26 10:45:56,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 312. [2023-11-26 10:45:56,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 270 states have (on average 1.374074074074074) internal successors, (371), 271 states have internal predecessors, (371), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-26 10:45:56,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 439 transitions. [2023-11-26 10:45:56,262 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 439 transitions. Word has length 151 [2023-11-26 10:45:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:56,262 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 439 transitions. [2023-11-26 10:45:56,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 439 transitions. [2023-11-26 10:45:56,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-26 10:45:56,264 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:56,264 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:56,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:56,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:56,472 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:56,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:56,473 INFO L85 PathProgramCache]: Analyzing trace with hash 2122711089, now seen corresponding path program 1 times [2023-11-26 10:45:56,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:56,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964986271] [2023-11-26 10:45:56,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:56,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:56,518 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:56,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586258131] [2023-11-26 10:45:56,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:56,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:56,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:56,520 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:56,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-26 10:45:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:56,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-26 10:45:56,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:57,008 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 15 treesize of output 1 [2023-11-26 10:45:57,016 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 19 treesize of output 11 [2023-11-26 10:45:57,181 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 30 treesize of output 18 [2023-11-26 10:45:57,185 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 19 treesize of output 11 [2023-11-26 10:45:57,197 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 15 treesize of output 7 [2023-11-26 10:45:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-26 10:45:57,234 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:57,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:57,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964986271] [2023-11-26 10:45:57,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:57,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586258131] [2023-11-26 10:45:57,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586258131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:57,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:57,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 10:45:57,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732157995] [2023-11-26 10:45:57,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:57,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:45:57,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:57,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:45:57,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:45:57,238 INFO L87 Difference]: Start difference. First operand 312 states and 439 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:58,297 INFO L93 Difference]: Finished difference Result 780 states and 1096 transitions. [2023-11-26 10:45:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:45:58,298 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 152 [2023-11-26 10:45:58,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:58,301 INFO L225 Difference]: With dead ends: 780 [2023-11-26 10:45:58,301 INFO L226 Difference]: Without dead ends: 547 [2023-11-26 10:45:58,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:45:58,302 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 512 mSDsluCounter, 1746 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 2121 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:58,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 2121 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 10:45:58,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-11-26 10:45:58,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 341. [2023-11-26 10:45:58,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 299 states have (on average 1.3846153846153846) internal successors, (414), 300 states have internal predecessors, (414), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-26 10:45:58,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 482 transitions. [2023-11-26 10:45:58,340 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 482 transitions. Word has length 152 [2023-11-26 10:45:58,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:58,341 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 482 transitions. [2023-11-26 10:45:58,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:45:58,342 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 482 transitions. [2023-11-26 10:45:58,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-26 10:45:58,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:58,344 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:58,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:58,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:58,553 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:58,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:58,553 INFO L85 PathProgramCache]: Analyzing trace with hash 534363187, now seen corresponding path program 1 times [2023-11-26 10:45:58,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:58,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38090516] [2023-11-26 10:45:58,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:58,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:58,616 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:58,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021210505] [2023-11-26 10:45:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:58,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:58,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:58,626 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:58,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-26 10:45:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:59,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-26 10:45:59,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:59,130 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 15 treesize of output 1 [2023-11-26 10:45:59,138 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 19 treesize of output 11 [2023-11-26 10:45:59,372 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 68 treesize of output 52 [2023-11-26 10:45:59,376 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 49 treesize of output 29 [2023-11-26 10:45:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-26 10:45:59,450 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:59,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:59,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38090516] [2023-11-26 10:45:59,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:59,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021210505] [2023-11-26 10:45:59,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021210505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:59,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:59,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 10:45:59,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159959602] [2023-11-26 10:45:59,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:59,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:45:59,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:59,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:45:59,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:45:59,453 INFO L87 Difference]: Start difference. First operand 341 states and 482 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:46:01,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:01,105 INFO L93 Difference]: Finished difference Result 854 states and 1201 transitions. [2023-11-26 10:46:01,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:46:01,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 152 [2023-11-26 10:46:01,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:01,110 INFO L225 Difference]: With dead ends: 854 [2023-11-26 10:46:01,110 INFO L226 Difference]: Without dead ends: 592 [2023-11-26 10:46:01,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-26 10:46:01,112 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 572 mSDsluCounter, 2054 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 2467 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:01,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 2467 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-26 10:46:01,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2023-11-26 10:46:01,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 343. [2023-11-26 10:46:01,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 301 states have (on average 1.3820598006644518) internal successors, (416), 302 states have internal predecessors, (416), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-26 10:46:01,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 484 transitions. [2023-11-26 10:46:01,143 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 484 transitions. Word has length 152 [2023-11-26 10:46:01,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:01,144 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 484 transitions. [2023-11-26 10:46:01,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:46:01,144 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 484 transitions. [2023-11-26 10:46:01,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-26 10:46:01,146 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:01,146 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:01,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:01,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:01,353 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:01,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:01,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1154580555, now seen corresponding path program 1 times [2023-11-26 10:46:01,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:01,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815531438] [2023-11-26 10:46:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:01,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:01,398 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:46:01,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306847526] [2023-11-26 10:46:01,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:01,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:01,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:01,400 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:01,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-26 10:46:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:01,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 10:46:01,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:01,917 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 17 treesize of output 9 [2023-11-26 10:46:01,921 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 15 treesize of output 7 [2023-11-26 10:46:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-26 10:46:01,933 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:01,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:01,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815531438] [2023-11-26 10:46:01,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:46:01,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306847526] [2023-11-26 10:46:01,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306847526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:01,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:01,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:46:01,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345416588] [2023-11-26 10:46:01,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:01,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:46:01,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:01,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:46:01,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:46:01,937 INFO L87 Difference]: Start difference. First operand 343 states and 484 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:46:02,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:02,192 INFO L93 Difference]: Finished difference Result 746 states and 1050 transitions. [2023-11-26 10:46:02,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:46:02,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 152 [2023-11-26 10:46:02,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:02,197 INFO L225 Difference]: With dead ends: 746 [2023-11-26 10:46:02,197 INFO L226 Difference]: Without dead ends: 482 [2023-11-26 10:46:02,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:46:02,199 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 244 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:02,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 1205 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:46:02,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-11-26 10:46:02,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 341. [2023-11-26 10:46:02,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 299 states have (on average 1.3779264214046822) internal successors, (412), 300 states have internal predecessors, (412), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-26 10:46:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 480 transitions. [2023-11-26 10:46:02,235 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 480 transitions. Word has length 152 [2023-11-26 10:46:02,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:02,235 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 480 transitions. [2023-11-26 10:46:02,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:46:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 480 transitions. [2023-11-26 10:46:02,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-26 10:46:02,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:02,237 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:02,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:02,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:02,446 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:02,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:02,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1507448779, now seen corresponding path program 1 times [2023-11-26 10:46:02,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:02,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497176545] [2023-11-26 10:46:02,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:02,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:02,488 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:46:02,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037772722] [2023-11-26 10:46:02,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:02,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:02,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:02,489 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:02,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-26 10:46:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:03,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-26 10:46:03,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:03,033 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 15 treesize of output 1 [2023-11-26 10:46:03,040 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 19 treesize of output 11 [2023-11-26 10:46:03,135 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 15 treesize of output 7 [2023-11-26 10:46:03,166 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 15 treesize of output 7 [2023-11-26 10:46:03,269 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 98 treesize of output 78 [2023-11-26 10:46:03,273 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 75 treesize of output 43 [2023-11-26 10:46:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-26 10:46:03,720 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:03,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:03,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497176545] [2023-11-26 10:46:03,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:46:03,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037772722] [2023-11-26 10:46:03,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037772722] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:03,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:03,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-26 10:46:03,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22859424] [2023-11-26 10:46:03,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:03,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 10:46:03,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:03,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 10:46:03,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:46:03,723 INFO L87 Difference]: Start difference. First operand 341 states and 480 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:46:05,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:05,419 INFO L93 Difference]: Finished difference Result 888 states and 1241 transitions. [2023-11-26 10:46:05,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 10:46:05,426 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 152 [2023-11-26 10:46:05,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:05,431 INFO L225 Difference]: With dead ends: 888 [2023-11-26 10:46:05,432 INFO L226 Difference]: Without dead ends: 626 [2023-11-26 10:46:05,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-11-26 10:46:05,435 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 623 mSDsluCounter, 2744 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 3269 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:05,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 3269 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-26 10:46:05,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2023-11-26 10:46:05,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 348. [2023-11-26 10:46:05,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 306 states have (on average 1.3790849673202614) internal successors, (422), 307 states have internal predecessors, (422), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-26 10:46:05,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 490 transitions. [2023-11-26 10:46:05,478 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 490 transitions. Word has length 152 [2023-11-26 10:46:05,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:05,478 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 490 transitions. [2023-11-26 10:46:05,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 10:46:05,479 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 490 transitions. [2023-11-26 10:46:05,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-26 10:46:05,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:05,480 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:05,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:05,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:05,681 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:05,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:05,681 INFO L85 PathProgramCache]: Analyzing trace with hash 299753841, now seen corresponding path program 1 times [2023-11-26 10:46:05,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:05,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989388373] [2023-11-26 10:46:05,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:05,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:05,750 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:46:05,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007727734] [2023-11-26 10:46:05,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:05,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:05,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:05,752 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:05,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266139bf-5607-4ef1-883e-50b5800a7d57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-26 10:46:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:06,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-26 10:46:06,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:06,273 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 15 treesize of output 1 [2023-11-26 10:46:06,280 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 19 treesize of output 11 [2023-11-26 10:46:06,439 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 27 treesize of output 19 [2023-11-26 10:46:06,480 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 30 treesize of output 18 [2023-11-26 10:46:06,488 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 19 treesize of output 11 [2023-11-26 10:46:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-26 10:46:06,901 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:06,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:06,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989388373] [2023-11-26 10:46:06,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:46:06,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007727734] [2023-11-26 10:46:06,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007727734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:06,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:06,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-26 10:46:06,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313806060] [2023-11-26 10:46:06,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:06,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 10:46:06,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:06,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 10:46:06,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:46:06,905 INFO L87 Difference]: Start difference. First operand 348 states and 490 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17)