./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-71.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_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-71.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya --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 ef425419d893cdf8f2db575b031c5b203ea887f7ed28e92ca0beafffac1fc1ee --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:59:37,885 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:59:37,942 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:59:37,948 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:59:37,948 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:59:37,970 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:59:37,970 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:59:37,971 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:59:37,971 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:59:37,972 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:59:37,972 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:59:37,973 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:59:37,974 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:59:37,974 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:59:37,975 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:59:37,975 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:59:37,976 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:59:37,976 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:59:37,977 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:59:37,977 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:59:37,978 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:59:37,980 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:59:37,981 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:59:37,981 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:59:37,981 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:59:37,982 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:59:37,982 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:59:37,982 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:59:37,983 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:59:37,983 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:59:37,984 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:59:37,984 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:59:37,984 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:59:37,984 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:59:37,985 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:59:37,985 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:59:37,985 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:59:37,985 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:59:37,985 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:59:37,985 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:59:37,986 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:59:37,986 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:59:37,986 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_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef425419d893cdf8f2db575b031c5b203ea887f7ed28e92ca0beafffac1fc1ee [2023-11-29 05:59:38,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:59:38,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:59:38,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:59:38,212 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:59:38,212 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:59:38,213 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-71.i [2023-11-29 05:59:40,971 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:59:41,220 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:59:41,221 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-71.i [2023-11-29 05:59:41,237 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/data/3a64a9771/da761c56ce314273bcca67b44a27de53/FLAG5633c3b1c [2023-11-29 05:59:41,253 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/data/3a64a9771/da761c56ce314273bcca67b44a27de53 [2023-11-29 05:59:41,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:59:41,257 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:59:41,259 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:59:41,259 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:59:41,265 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:59:41,266 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:59:41" (1/1) ... [2023-11-29 05:59:41,267 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b161a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:59:41, skipping insertion in model container [2023-11-29 05:59:41,267 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:59:41" (1/1) ... [2023-11-29 05:59:41,328 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:59:41,482 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_7e6a7b24-42f4-48d7-b185-00eb56e43109/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-71.i[916,929] [2023-11-29 05:59:41,646 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:59:41,665 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:59:41,678 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_7e6a7b24-42f4-48d7-b185-00eb56e43109/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-71.i[916,929] [2023-11-29 05:59:41,755 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:59:41,775 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:59:41,775 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:59:41 WrapperNode [2023-11-29 05:59:41,775 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:59:41,776 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:59:41,776 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:59:41,776 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:59:41,782 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:59:41" (1/1) ... [2023-11-29 05:59:41,807 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:59:41" (1/1) ... [2023-11-29 05:59:41,881 INFO L138 Inliner]: procedures = 26, calls = 110, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 772 [2023-11-29 05:59:41,881 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:59:41,882 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:59:41,882 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:59:41,882 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:59:41,912 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:59:41" (1/1) ... [2023-11-29 05:59:41,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:59:41" (1/1) ... [2023-11-29 05:59:41,922 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:59:41" (1/1) ... [2023-11-29 05:59:41,950 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 05:59:41,950 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:59:41" (1/1) ... [2023-11-29 05:59:41,951 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:59:41" (1/1) ... [2023-11-29 05:59:41,969 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:59:41" (1/1) ... [2023-11-29 05:59:41,977 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:59:41" (1/1) ... [2023-11-29 05:59:41,990 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:59:41" (1/1) ... [2023-11-29 05:59:41,997 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:59:41" (1/1) ... [2023-11-29 05:59:42,011 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:59:42,012 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:59:42,012 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:59:42,012 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:59:42,013 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:59:41" (1/1) ... [2023-11-29 05:59:42,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:59:42,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:59:42,042 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:59:42,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:59:42,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:59:42,076 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 05:59:42,076 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 05:59:42,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:59:42,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:59:42,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:59:42,199 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:59:42,200 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:59:43,140 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:59:43,201 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:59:43,202 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 05:59:43,202 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:59:43 BoogieIcfgContainer [2023-11-29 05:59:43,203 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:59:43,205 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:59:43,205 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:59:43,208 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:59:43,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:59:41" (1/3) ... [2023-11-29 05:59:43,209 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1d83f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:59:43, skipping insertion in model container [2023-11-29 05:59:43,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:59:41" (2/3) ... [2023-11-29 05:59:43,210 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1d83f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:59:43, skipping insertion in model container [2023-11-29 05:59:43,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:59:43" (3/3) ... [2023-11-29 05:59:43,211 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-71.i [2023-11-29 05:59:43,230 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:59:43,230 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:59:43,290 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:59:43,297 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;@81e6eca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:59:43,298 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:59:43,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 202 states have (on average 1.6534653465346534) internal successors, (334), 203 states have internal predecessors, (334), 97 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2023-11-29 05:59:43,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2023-11-29 05:59:43,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:59:43,347 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:59:43,347 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:59:43,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:59:43,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1620831971, now seen corresponding path program 1 times [2023-11-29 05:59:43,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:59:43,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810765430] [2023-11-29 05:59:43,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:59:43,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:59:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:59:43,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:59:43,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810765430] [2023-11-29 05:59:43,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 05:59:43,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423331604] [2023-11-29 05:59:43,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:59:43,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:59:43,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:59:43,723 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:59:43,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:59:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:59:44,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 05:59:44,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:59:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 18432 trivial. 0 not checked. [2023-11-29 05:59:44,269 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:59:44,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423331604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:59:44,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:59:44,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:59:44,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430256125] [2023-11-29 05:59:44,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:59:44,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 05:59:44,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:59:44,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 05:59:44,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 05:59:44,310 INFO L87 Difference]: Start difference. First operand has 302 states, 202 states have (on average 1.6534653465346534) internal successors, (334), 203 states have internal predecessors, (334), 97 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (97), 2 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 2 states have call successors, (97) [2023-11-29 05:59:44,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:59:44,400 INFO L93 Difference]: Finished difference Result 601 states and 1151 transitions. [2023-11-29 05:59:44,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 05:59:44,403 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (97), 2 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 2 states have call successors, (97) Word has length 612 [2023-11-29 05:59:44,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:59:44,415 INFO L225 Difference]: With dead ends: 601 [2023-11-29 05:59:44,415 INFO L226 Difference]: Without dead ends: 300 [2023-11-29 05:59:44,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 611 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 05:59:44,426 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:59:44,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 518 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:59:44,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2023-11-29 05:59:44,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2023-11-29 05:59:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 201 states have (on average 1.626865671641791) internal successors, (327), 201 states have internal predecessors, (327), 97 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2023-11-29 05:59:44,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 521 transitions. [2023-11-29 05:59:44,515 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 521 transitions. Word has length 612 [2023-11-29 05:59:44,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:59:44,516 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 521 transitions. [2023-11-29 05:59:44,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (97), 2 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 2 states have call successors, (97) [2023-11-29 05:59:44,516 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 521 transitions. [2023-11-29 05:59:44,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2023-11-29 05:59:44,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:59:44,535 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:59:44,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:59:44,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 05:59:44,736 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:59:44,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:59:44,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1749066361, now seen corresponding path program 1 times [2023-11-29 05:59:44,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:59:44,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674700951] [2023-11-29 05:59:44,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:59:44,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:59:44,871 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:59:44,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572173563] [2023-11-29 05:59:44,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:59:44,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:59:44,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:59:44,876 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:59:44,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:59:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:59:45,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:59:45,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:59:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 05:59:46,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:59:46,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:59:46,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674700951] [2023-11-29 05:59:46,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:59:46,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572173563] [2023-11-29 05:59:46,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572173563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:59:46,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:59:46,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:59:46,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151240777] [2023-11-29 05:59:46,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:59:46,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:59:46,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:59:46,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:59:46,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:59:46,173 INFO L87 Difference]: Start difference. First operand 300 states and 521 transitions. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 4 states have internal predecessors, (130), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 05:59:47,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:59:47,244 INFO L93 Difference]: Finished difference Result 2130 states and 3673 transitions. [2023-11-29 05:59:47,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:59:47,245 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 4 states have internal predecessors, (130), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 612 [2023-11-29 05:59:47,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:59:47,261 INFO L225 Difference]: With dead ends: 2130 [2023-11-29 05:59:47,261 INFO L226 Difference]: Without dead ends: 1831 [2023-11-29 05:59:47,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:59:47,264 INFO L413 NwaCegarLoop]: 980 mSDtfsCounter, 1838 mSDsluCounter, 3182 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1838 SdHoareTripleChecker+Valid, 4162 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:59:47,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1838 Valid, 4162 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 05:59:47,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2023-11-29 05:59:47,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1813. [2023-11-29 05:59:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1200 states have (on average 1.6091666666666666) internal successors, (1931), 1204 states have internal predecessors, (1931), 604 states have call successors, (604), 8 states have call predecessors, (604), 8 states have return successors, (604), 600 states have call predecessors, (604), 604 states have call successors, (604) [2023-11-29 05:59:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 3139 transitions. [2023-11-29 05:59:47,583 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 3139 transitions. Word has length 612 [2023-11-29 05:59:47,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:59:47,586 INFO L495 AbstractCegarLoop]: Abstraction has 1813 states and 3139 transitions. [2023-11-29 05:59:47,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 4 states have internal predecessors, (130), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 05:59:47,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 3139 transitions. [2023-11-29 05:59:47,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2023-11-29 05:59:47,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:59:47,595 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:59:47,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 05:59:47,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:59:47,796 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:59:47,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:59:47,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1648507657, now seen corresponding path program 1 times [2023-11-29 05:59:47,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:59:47,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088483724] [2023-11-29 05:59:47,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:59:47,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:59:47,882 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:59:47,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057561595] [2023-11-29 05:59:47,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:59:47,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:59:47,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:59:47,885 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:59:47,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:59:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:59:48,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:59:48,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:59:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 05:59:49,103 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:59:49,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:59:49,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088483724] [2023-11-29 05:59:49,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:59:49,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057561595] [2023-11-29 05:59:49,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057561595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:59:49,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:59:49,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:59:49,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708725338] [2023-11-29 05:59:49,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:59:49,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:59:49,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:59:49,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:59:49,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:59:49,108 INFO L87 Difference]: Start difference. First operand 1813 states and 3139 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 05:59:49,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:59:49,254 INFO L93 Difference]: Finished difference Result 4532 states and 7848 transitions. [2023-11-29 05:59:49,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:59:49,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 612 [2023-11-29 05:59:49,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:59:49,274 INFO L225 Difference]: With dead ends: 4532 [2023-11-29 05:59:49,274 INFO L226 Difference]: Without dead ends: 2720 [2023-11-29 05:59:49,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:59:49,281 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 237 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:59:49,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 1163 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:59:49,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2023-11-29 05:59:49,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 1813. [2023-11-29 05:59:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1200 states have (on average 1.6091666666666666) internal successors, (1931), 1204 states have internal predecessors, (1931), 604 states have call successors, (604), 8 states have call predecessors, (604), 8 states have return successors, (604), 600 states have call predecessors, (604), 604 states have call successors, (604) [2023-11-29 05:59:49,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 3139 transitions. [2023-11-29 05:59:49,632 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 3139 transitions. Word has length 612 [2023-11-29 05:59:49,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:59:49,633 INFO L495 AbstractCegarLoop]: Abstraction has 1813 states and 3139 transitions. [2023-11-29 05:59:49,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 05:59:49,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 3139 transitions. [2023-11-29 05:59:49,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2023-11-29 05:59:49,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:59:49,642 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:59:49,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:59:49,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:59:49,843 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:59:49,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:59:49,843 INFO L85 PathProgramCache]: Analyzing trace with hash -210726331, now seen corresponding path program 1 times [2023-11-29 05:59:49,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:59:49,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650924224] [2023-11-29 05:59:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:59:49,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:59:49,904 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:59:49,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106211750] [2023-11-29 05:59:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:59:49,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:59:49,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:59:49,905 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:59:49,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:59:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:59:50,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:59:50,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:59:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 05:59:50,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:59:50,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:59:50,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650924224] [2023-11-29 05:59:50,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:59:50,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106211750] [2023-11-29 05:59:50,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106211750] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:59:50,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:59:50,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:59:50,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123190402] [2023-11-29 05:59:50,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:59:50,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:59:50,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:59:50,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:59:50,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:59:50,391 INFO L87 Difference]: Start difference. First operand 1813 states and 3139 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 05:59:50,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:59:50,617 INFO L93 Difference]: Finished difference Result 5031 states and 8719 transitions. [2023-11-29 05:59:50,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:59:50,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 612 [2023-11-29 05:59:50,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:59:50,646 INFO L225 Difference]: With dead ends: 5031 [2023-11-29 05:59:50,646 INFO L226 Difference]: Without dead ends: 3219 [2023-11-29 05:59:50,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:59:50,656 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 306 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:59:50,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 1136 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:59:50,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2023-11-29 05:59:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 3209. [2023-11-29 05:59:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 2188 states have (on average 1.6179159049360146) internal successors, (3540), 2200 states have internal predecessors, (3540), 1004 states have call successors, (1004), 16 states have call predecessors, (1004), 16 states have return successors, (1004), 992 states have call predecessors, (1004), 1004 states have call successors, (1004) [2023-11-29 05:59:51,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 5548 transitions. [2023-11-29 05:59:51,130 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 5548 transitions. Word has length 612 [2023-11-29 05:59:51,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:59:51,131 INFO L495 AbstractCegarLoop]: Abstraction has 3209 states and 5548 transitions. [2023-11-29 05:59:51,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 05:59:51,132 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 5548 transitions. [2023-11-29 05:59:51,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2023-11-29 05:59:51,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:59:51,142 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:59:51,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:59:51,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:59:51,346 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:59:51,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:59:51,346 INFO L85 PathProgramCache]: Analyzing trace with hash 810342023, now seen corresponding path program 1 times [2023-11-29 05:59:51,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:59:51,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852466465] [2023-11-29 05:59:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:59:51,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:59:51,406 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:59:51,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485518576] [2023-11-29 05:59:51,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:59:51,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:59:51,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:59:51,408 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:59:51,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:59:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:59:51,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:59:51,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:59:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 05:59:52,350 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:59:52,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:59:52,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852466465] [2023-11-29 05:59:52,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:59:52,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485518576] [2023-11-29 05:59:52,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485518576] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:59:52,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:59:52,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:59:52,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315998390] [2023-11-29 05:59:52,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:59:52,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:59:52,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:59:52,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:59:52,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:59:52,354 INFO L87 Difference]: Start difference. First operand 3209 states and 5548 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 05:59:52,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:59:52,565 INFO L93 Difference]: Finished difference Result 6419 states and 11096 transitions. [2023-11-29 05:59:52,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:59:52,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 612 [2023-11-29 05:59:52,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:59:52,584 INFO L225 Difference]: With dead ends: 6419 [2023-11-29 05:59:52,584 INFO L226 Difference]: Without dead ends: 3211 [2023-11-29 05:59:52,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:59:52,593 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 258 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:59:52,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 1016 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:59:52,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2023-11-29 05:59:52,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 3209. [2023-11-29 05:59:52,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 2188 states have (on average 1.6160877513711152) internal successors, (3536), 2200 states have internal predecessors, (3536), 1004 states have call successors, (1004), 16 states have call predecessors, (1004), 16 states have return successors, (1004), 992 states have call predecessors, (1004), 1004 states have call successors, (1004) [2023-11-29 05:59:52,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 5544 transitions. [2023-11-29 05:59:52,915 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 5544 transitions. Word has length 612 [2023-11-29 05:59:52,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:59:52,916 INFO L495 AbstractCegarLoop]: Abstraction has 3209 states and 5544 transitions. [2023-11-29 05:59:52,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 05:59:52,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 5544 transitions. [2023-11-29 05:59:52,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2023-11-29 05:59:52,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:59:52,922 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:59:52,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:59:53,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:59:53,123 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:59:53,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:59:53,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2087587201, now seen corresponding path program 1 times [2023-11-29 05:59:53,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:59:53,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374478147] [2023-11-29 05:59:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:59:53,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:59:53,192 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:59:53,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508638080] [2023-11-29 05:59:53,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:59:53,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:59:53,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:59:53,193 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:59:53,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:59:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:59:53,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:59:53,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:59:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 8946 proven. 111 refuted. 0 times theorem prover too weak. 9567 trivial. 0 not checked. [2023-11-29 05:59:53,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:59:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 177 proven. 111 refuted. 0 times theorem prover too weak. 18336 trivial. 0 not checked. [2023-11-29 05:59:54,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:59:54,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374478147] [2023-11-29 05:59:54,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:59:54,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508638080] [2023-11-29 05:59:54,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508638080] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:59:54,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:59:54,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 05:59:54,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851492373] [2023-11-29 05:59:54,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:59:54,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:59:54,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:59:54,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:59:54,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:59:54,512 INFO L87 Difference]: Start difference. First operand 3209 states and 5544 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (134), 2 states have call predecessors, (134), 4 states have return successors, (135), 2 states have call predecessors, (135), 2 states have call successors, (135) [2023-11-29 05:59:55,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:59:55,241 INFO L93 Difference]: Finished difference Result 6465 states and 11131 transitions. [2023-11-29 05:59:55,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:59:55,243 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (134), 2 states have call predecessors, (134), 4 states have return successors, (135), 2 states have call predecessors, (135), 2 states have call successors, (135) Word has length 613 [2023-11-29 05:59:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:59:55,268 INFO L225 Difference]: With dead ends: 6465 [2023-11-29 05:59:55,269 INFO L226 Difference]: Without dead ends: 3257 [2023-11-29 05:59:55,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1228 GetRequests, 1218 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:59:55,282 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 315 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:59:55,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 1030 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:59:55,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2023-11-29 05:59:55,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3225. [2023-11-29 05:59:55,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 2200 states have (on average 1.5981818181818181) internal successors, (3516), 2212 states have internal predecessors, (3516), 1004 states have call successors, (1004), 20 states have call predecessors, (1004), 20 states have return successors, (1004), 992 states have call predecessors, (1004), 1004 states have call successors, (1004) [2023-11-29 05:59:55,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 5524 transitions. [2023-11-29 05:59:55,752 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 5524 transitions. Word has length 613 [2023-11-29 05:59:55,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:59:55,754 INFO L495 AbstractCegarLoop]: Abstraction has 3225 states and 5524 transitions. [2023-11-29 05:59:55,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (134), 2 states have call predecessors, (134), 4 states have return successors, (135), 2 states have call predecessors, (135), 2 states have call successors, (135) [2023-11-29 05:59:55,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 5524 transitions. [2023-11-29 05:59:55,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2023-11-29 05:59:55,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:59:55,763 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:59:55,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:59:55,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 05:59:55,964 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:59:55,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:59:55,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1081627755, now seen corresponding path program 1 times [2023-11-29 05:59:55,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:59:55,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877884185] [2023-11-29 05:59:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:59:55,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:59:56,043 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:59:56,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328776097] [2023-11-29 05:59:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:59:56,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:59:56,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:59:56,045 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:59:56,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:59:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:59:56,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:59:56,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:59:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 05:59:56,430 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:59:56,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:59:56,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877884185] [2023-11-29 05:59:56,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:59:56,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328776097] [2023-11-29 05:59:56,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328776097] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:59:56,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:59:56,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:59:56,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045354740] [2023-11-29 05:59:56,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:59:56,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:59:56,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:59:56,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:59:56,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:59:56,434 INFO L87 Difference]: Start difference. First operand 3225 states and 5524 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 05:59:56,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:59:56,725 INFO L93 Difference]: Finished difference Result 9673 states and 16570 transitions. [2023-11-29 05:59:56,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:59:56,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 614 [2023-11-29 05:59:56,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:59:56,765 INFO L225 Difference]: With dead ends: 9673 [2023-11-29 05:59:56,766 INFO L226 Difference]: Without dead ends: 6449 [2023-11-29 05:59:56,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:59:56,779 INFO L413 NwaCegarLoop]: 1024 mSDtfsCounter, 513 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:59:56,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 1534 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:59:56,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6449 states. [2023-11-29 05:59:57,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6449 to 6447. [2023-11-29 05:59:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6447 states, 4398 states have (on average 1.5948158253751705) internal successors, (7014), 4422 states have internal predecessors, (7014), 2008 states have call successors, (2008), 40 states have call predecessors, (2008), 40 states have return successors, (2008), 1984 states have call predecessors, (2008), 2008 states have call successors, (2008) [2023-11-29 05:59:57,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6447 states to 6447 states and 11030 transitions. [2023-11-29 05:59:57,510 INFO L78 Accepts]: Start accepts. Automaton has 6447 states and 11030 transitions. Word has length 614 [2023-11-29 05:59:57,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:59:57,511 INFO L495 AbstractCegarLoop]: Abstraction has 6447 states and 11030 transitions. [2023-11-29 05:59:57,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 05:59:57,511 INFO L276 IsEmpty]: Start isEmpty. Operand 6447 states and 11030 transitions. [2023-11-29 05:59:57,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2023-11-29 05:59:57,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:59:57,521 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:59:57,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:59:57,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 05:59:57,722 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:59:57,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:59:57,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1143667369, now seen corresponding path program 1 times [2023-11-29 05:59:57,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:59:57,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484213779] [2023-11-29 05:59:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:59:57,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:59:57,774 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:59:57,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804883010] [2023-11-29 05:59:57,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:59:57,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:59:57,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:59:57,775 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:59:57,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:59:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:59:58,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:59:58,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:59:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 05:59:58,207 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:59:58,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:59:58,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484213779] [2023-11-29 05:59:58,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:59:58,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804883010] [2023-11-29 05:59:58,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804883010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:59:58,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:59:58,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:59:58,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572218686] [2023-11-29 05:59:58,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:59:58,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:59:58,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:59:58,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:59:58,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:59:58,210 INFO L87 Difference]: Start difference. First operand 6447 states and 11030 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 05:59:58,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:59:58,731 INFO L93 Difference]: Finished difference Result 13689 states and 23497 transitions. [2023-11-29 05:59:58,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:59:58,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 614 [2023-11-29 05:59:58,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:59:58,774 INFO L225 Difference]: With dead ends: 13689 [2023-11-29 05:59:58,774 INFO L226 Difference]: Without dead ends: 6479 [2023-11-29 05:59:58,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 611 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:59:58,793 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 378 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:59:58,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 1157 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:59:58,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6479 states. [2023-11-29 05:59:59,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6479 to 6479. [2023-11-29 05:59:59,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6479 states, 4422 states have (on average 1.5816372682044324) internal successors, (6994), 4446 states have internal predecessors, (6994), 2008 states have call successors, (2008), 48 states have call predecessors, (2008), 48 states have return successors, (2008), 1984 states have call predecessors, (2008), 2008 states have call successors, (2008) [2023-11-29 05:59:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6479 states to 6479 states and 11010 transitions. [2023-11-29 05:59:59,515 INFO L78 Accepts]: Start accepts. Automaton has 6479 states and 11010 transitions. Word has length 614 [2023-11-29 05:59:59,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:59:59,516 INFO L495 AbstractCegarLoop]: Abstraction has 6479 states and 11010 transitions. [2023-11-29 05:59:59,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 05:59:59,517 INFO L276 IsEmpty]: Start isEmpty. Operand 6479 states and 11010 transitions. [2023-11-29 05:59:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2023-11-29 05:59:59,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:59:59,526 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:59:59,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:59:59,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 05:59:59,728 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:59:59,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:59:59,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1845267243, now seen corresponding path program 1 times [2023-11-29 05:59:59,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:59:59,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910971259] [2023-11-29 05:59:59,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:59:59,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:59:59,811 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:59:59,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064063616] [2023-11-29 05:59:59,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:59:59,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:59:59,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:59:59,813 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:59:59,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:00:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:00:00,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:00:00,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:00:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 06:00:00,833 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:00:00,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:00:00,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910971259] [2023-11-29 06:00:00,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:00:00,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064063616] [2023-11-29 06:00:00,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064063616] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:00:00,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:00:00,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:00:00,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936897176] [2023-11-29 06:00:00,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:00:00,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:00:00,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:00:00,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:00:00,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:00:00,836 INFO L87 Difference]: Start difference. First operand 6479 states and 11010 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 5 states have internal predecessors, (132), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:00:04,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:00:04,163 INFO L93 Difference]: Finished difference Result 39259 states and 66756 transitions. [2023-11-29 06:00:04,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:00:04,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 5 states have internal predecessors, (132), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 614 [2023-11-29 06:00:04,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:00:04,273 INFO L225 Difference]: With dead ends: 39259 [2023-11-29 06:00:04,273 INFO L226 Difference]: Without dead ends: 32781 [2023-11-29 06:00:04,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 609 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:00:04,302 INFO L413 NwaCegarLoop]: 968 mSDtfsCounter, 2086 mSDsluCounter, 2617 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2086 SdHoareTripleChecker+Valid, 3585 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:00:04,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2086 Valid, 3585 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 06:00:04,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32781 states. [2023-11-29 06:00:07,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32781 to 32227. [2023-11-29 06:00:07,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32227 states, 21946 states have (on average 1.5586439442267384) internal successors, (34206), 22066 states have internal predecessors, (34206), 10040 states have call successors, (10040), 240 states have call predecessors, (10040), 240 states have return successors, (10040), 9920 states have call predecessors, (10040), 10040 states have call successors, (10040) [2023-11-29 06:00:07,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32227 states to 32227 states and 54286 transitions. [2023-11-29 06:00:07,963 INFO L78 Accepts]: Start accepts. Automaton has 32227 states and 54286 transitions. Word has length 614 [2023-11-29 06:00:07,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:00:07,964 INFO L495 AbstractCegarLoop]: Abstraction has 32227 states and 54286 transitions. [2023-11-29 06:00:07,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 5 states have internal predecessors, (132), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:00:07,965 INFO L276 IsEmpty]: Start isEmpty. Operand 32227 states and 54286 transitions. [2023-11-29 06:00:07,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2023-11-29 06:00:07,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:00:07,986 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:00:07,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:00:08,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:00:08,186 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:00:08,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:00:08,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1619261810, now seen corresponding path program 1 times [2023-11-29 06:00:08,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:00:08,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102403666] [2023-11-29 06:00:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:00:08,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:00:08,251 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:00:08,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257333926] [2023-11-29 06:00:08,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:00:08,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:00:08,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:00:08,253 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:00:08,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:00:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:00:08,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:00:08,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:00:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 06:00:08,740 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:00:08,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:00:08,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102403666] [2023-11-29 06:00:08,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:00:08,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257333926] [2023-11-29 06:00:08,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257333926] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:00:08,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:00:08,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:00:08,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620882265] [2023-11-29 06:00:08,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:00:08,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:00:08,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:00:08,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:00:08,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:00:08,745 INFO L87 Difference]: Start difference. First operand 32227 states and 54286 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:00:11,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:00:11,783 INFO L93 Difference]: Finished difference Result 90047 states and 151564 transitions. [2023-11-29 06:00:11,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:00:11,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 615 [2023-11-29 06:00:11,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:00:11,977 INFO L225 Difference]: With dead ends: 90047 [2023-11-29 06:00:11,977 INFO L226 Difference]: Without dead ends: 57821 [2023-11-29 06:00:12,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 613 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:00:12,054 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 469 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:00:12,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 1010 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:00:12,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57821 states. [2023-11-29 06:00:18,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57821 to 57691. [2023-11-29 06:00:18,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57691 states, 39186 states have (on average 1.5451947123972847) internal successors, (60550), 39402 states have internal predecessors, (60550), 18072 states have call successors, (18072), 432 states have call predecessors, (18072), 432 states have return successors, (18072), 17856 states have call predecessors, (18072), 18072 states have call successors, (18072) [2023-11-29 06:00:19,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57691 states to 57691 states and 96694 transitions. [2023-11-29 06:00:19,013 INFO L78 Accepts]: Start accepts. Automaton has 57691 states and 96694 transitions. Word has length 615 [2023-11-29 06:00:19,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:00:19,013 INFO L495 AbstractCegarLoop]: Abstraction has 57691 states and 96694 transitions. [2023-11-29 06:00:19,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:00:19,013 INFO L276 IsEmpty]: Start isEmpty. Operand 57691 states and 96694 transitions. [2023-11-29 06:00:19,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2023-11-29 06:00:19,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:00:19,034 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:00:19,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:00:19,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:00:19,235 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:00:19,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:00:19,236 INFO L85 PathProgramCache]: Analyzing trace with hash -624721488, now seen corresponding path program 1 times [2023-11-29 06:00:19,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:00:19,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683555237] [2023-11-29 06:00:19,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:00:19,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:00:19,289 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:00:19,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120587350] [2023-11-29 06:00:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:00:19,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:00:19,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:00:19,291 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:00:19,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:00:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:00:19,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:00:19,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:00:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 9276 proven. 126 refuted. 0 times theorem prover too weak. 9222 trivial. 0 not checked. [2023-11-29 06:00:19,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:00:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 162 proven. 126 refuted. 0 times theorem prover too weak. 18336 trivial. 0 not checked. [2023-11-29 06:00:20,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:00:20,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683555237] [2023-11-29 06:00:20,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:00:20,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120587350] [2023-11-29 06:00:20,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120587350] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:00:20,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:00:20,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 06:00:20,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413266253] [2023-11-29 06:00:20,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:00:20,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:00:20,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:00:20,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:00:20,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:00:20,305 INFO L87 Difference]: Start difference. First operand 57691 states and 96694 transitions. Second operand has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 3 states have call successors, (139), 2 states have call predecessors, (139), 4 states have return successors, (140), 3 states have call predecessors, (140), 3 states have call successors, (140) [2023-11-29 06:00:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:00:28,058 INFO L93 Difference]: Finished difference Result 145739 states and 243078 transitions. [2023-11-29 06:00:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:00:28,059 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 3 states have call successors, (139), 2 states have call predecessors, (139), 4 states have return successors, (140), 3 states have call predecessors, (140), 3 states have call successors, (140) Word has length 615 [2023-11-29 06:00:28,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:00:28,287 INFO L225 Difference]: With dead ends: 145739 [2023-11-29 06:00:28,288 INFO L226 Difference]: Without dead ends: 88049 [2023-11-29 06:00:28,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1239 GetRequests, 1221 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:00:28,431 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 1905 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 621 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1960 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 621 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:00:28,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1960 Valid, 1947 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [621 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 06:00:28,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88049 states. [2023-11-29 06:00:37,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88049 to 28991. [2023-11-29 06:00:37,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28991 states, 19702 states have (on average 1.5391330829357426) internal successors, (30324), 19810 states have internal predecessors, (30324), 9036 states have call successors, (9036), 252 states have call predecessors, (9036), 252 states have return successors, (9036), 8928 states have call predecessors, (9036), 9036 states have call successors, (9036) [2023-11-29 06:00:37,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28991 states to 28991 states and 48396 transitions. [2023-11-29 06:00:37,145 INFO L78 Accepts]: Start accepts. Automaton has 28991 states and 48396 transitions. Word has length 615 [2023-11-29 06:00:37,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:00:37,146 INFO L495 AbstractCegarLoop]: Abstraction has 28991 states and 48396 transitions. [2023-11-29 06:00:37,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 3 states have call successors, (139), 2 states have call predecessors, (139), 4 states have return successors, (140), 3 states have call predecessors, (140), 3 states have call successors, (140) [2023-11-29 06:00:37,146 INFO L276 IsEmpty]: Start isEmpty. Operand 28991 states and 48396 transitions. [2023-11-29 06:00:37,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2023-11-29 06:00:37,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:00:37,158 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:00:37,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:00:37,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:00:37,358 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:00:37,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:00:37,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1579682097, now seen corresponding path program 1 times [2023-11-29 06:00:37,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:00:37,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380828900] [2023-11-29 06:00:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:00:37,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:00:37,416 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:00:37,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697472650] [2023-11-29 06:00:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:00:37,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:00:37,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:00:37,418 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:00:37,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:00:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:00:37,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:00:37,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:00:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 9378 proven. 135 refuted. 0 times theorem prover too weak. 9111 trivial. 0 not checked. [2023-11-29 06:00:38,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:00:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 153 proven. 135 refuted. 0 times theorem prover too weak. 18336 trivial. 0 not checked. [2023-11-29 06:00:38,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:00:38,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380828900] [2023-11-29 06:00:38,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:00:38,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697472650] [2023-11-29 06:00:38,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697472650] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:00:38,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:00:38,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 06:00:38,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568368195] [2023-11-29 06:00:38,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:00:38,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:00:38,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:00:38,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:00:38,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:00:38,436 INFO L87 Difference]: Start difference. First operand 28991 states and 48396 transitions. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 2 states have call successors, (142), 2 states have call predecessors, (142), 4 states have return successors, (143), 2 states have call predecessors, (143), 2 states have call successors, (143) [2023-11-29 06:00:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:00:40,932 INFO L93 Difference]: Finished difference Result 46153 states and 76517 transitions. [2023-11-29 06:00:40,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:00:40,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 2 states have call successors, (142), 2 states have call predecessors, (142), 4 states have return successors, (143), 2 states have call predecessors, (143), 2 states have call successors, (143) Word has length 616 [2023-11-29 06:00:40,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:00:40,966 INFO L225 Difference]: With dead ends: 46153 [2023-11-29 06:00:40,966 INFO L226 Difference]: Without dead ends: 17163 [2023-11-29 06:00:40,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1234 GetRequests, 1224 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:00:40,997 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 338 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:00:40,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 996 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:00:41,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17163 states. [2023-11-29 06:00:42,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17163 to 11523. [2023-11-29 06:00:42,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11523 states, 8362 states have (on average 1.5821573786175556) internal successors, (13230), 8382 states have internal predecessors, (13230), 3020 states have call successors, (3020), 140 states have call predecessors, (3020), 140 states have return successors, (3020), 3000 states have call predecessors, (3020), 3020 states have call successors, (3020) [2023-11-29 06:00:42,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11523 states to 11523 states and 19270 transitions. [2023-11-29 06:00:42,378 INFO L78 Accepts]: Start accepts. Automaton has 11523 states and 19270 transitions. Word has length 616 [2023-11-29 06:00:42,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:00:42,379 INFO L495 AbstractCegarLoop]: Abstraction has 11523 states and 19270 transitions. [2023-11-29 06:00:42,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 2 states have call successors, (142), 2 states have call predecessors, (142), 4 states have return successors, (143), 2 states have call predecessors, (143), 2 states have call successors, (143) [2023-11-29 06:00:42,380 INFO L276 IsEmpty]: Start isEmpty. Operand 11523 states and 19270 transitions. [2023-11-29 06:00:42,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2023-11-29 06:00:42,386 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:00:42,387 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:00:42,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 06:00:42,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:00:42,587 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:00:42,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:00:42,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1592036534, now seen corresponding path program 1 times [2023-11-29 06:00:42,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:00:42,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084535029] [2023-11-29 06:00:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:00:42,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:00:42,647 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:00:42,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265193427] [2023-11-29 06:00:42,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:00:42,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:00:42,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:00:42,649 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:00:42,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:00:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:00:43,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 1411 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:00:43,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:00:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 06:00:43,596 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:00:43,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:00:43,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084535029] [2023-11-29 06:00:43,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:00:43,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265193427] [2023-11-29 06:00:43,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265193427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:00:43,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:00:43,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:00:43,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451473804] [2023-11-29 06:00:43,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:00:43,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:00:43,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:00:43,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:00:43,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:00:43,599 INFO L87 Difference]: Start difference. First operand 11523 states and 19270 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:00:45,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:00:45,216 INFO L93 Difference]: Finished difference Result 27269 states and 45755 transitions. [2023-11-29 06:00:45,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:00:45,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 618 [2023-11-29 06:00:45,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:00:45,242 INFO L225 Difference]: With dead ends: 27269 [2023-11-29 06:00:45,242 INFO L226 Difference]: Without dead ends: 15747 [2023-11-29 06:00:45,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 614 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:00:45,259 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 760 mSDsluCounter, 1301 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 1925 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:00:45,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 1925 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:00:45,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15747 states. [2023-11-29 06:00:47,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15747 to 15723. [2023-11-29 06:00:47,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15723 states, 11982 states have (on average 1.6094141211817727) internal successors, (19284), 12022 states have internal predecessors, (19284), 3580 states have call successors, (3580), 160 states have call predecessors, (3580), 160 states have return successors, (3580), 3540 states have call predecessors, (3580), 3580 states have call successors, (3580) [2023-11-29 06:00:47,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15723 states to 15723 states and 26444 transitions. [2023-11-29 06:00:47,204 INFO L78 Accepts]: Start accepts. Automaton has 15723 states and 26444 transitions. Word has length 618 [2023-11-29 06:00:47,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:00:47,205 INFO L495 AbstractCegarLoop]: Abstraction has 15723 states and 26444 transitions. [2023-11-29 06:00:47,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:00:47,205 INFO L276 IsEmpty]: Start isEmpty. Operand 15723 states and 26444 transitions. [2023-11-29 06:00:47,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2023-11-29 06:00:47,218 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:00:47,218 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:00:47,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:00:47,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:00:47,419 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:00:47,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:00:47,420 INFO L85 PathProgramCache]: Analyzing trace with hash -949521417, now seen corresponding path program 1 times [2023-11-29 06:00:47,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:00:47,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963556399] [2023-11-29 06:00:47,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:00:47,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:00:47,468 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:00:47,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001463241] [2023-11-29 06:00:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:00:47,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:00:47,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:00:47,470 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:00:47,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:00:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:00:47,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:00:47,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:00:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 06:00:48,474 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:00:48,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:00:48,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963556399] [2023-11-29 06:00:48,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:00:48,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001463241] [2023-11-29 06:00:48,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001463241] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:00:48,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:00:48,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:00:48,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474806003] [2023-11-29 06:00:48,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:00:48,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:00:48,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:00:48,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:00:48,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:00:48,477 INFO L87 Difference]: Start difference. First operand 15723 states and 26444 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 5 states have internal predecessors, (136), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:00:50,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:00:50,995 INFO L93 Difference]: Finished difference Result 33109 states and 55429 transitions. [2023-11-29 06:00:50,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:00:50,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 5 states have internal predecessors, (136), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 618 [2023-11-29 06:00:50,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:00:51,030 INFO L225 Difference]: With dead ends: 33109 [2023-11-29 06:00:51,030 INFO L226 Difference]: Without dead ends: 15622 [2023-11-29 06:00:51,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 613 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:00:51,057 INFO L413 NwaCegarLoop]: 888 mSDtfsCounter, 742 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 2699 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 06:00:51,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 2699 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 06:00:51,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15622 states. [2023-11-29 06:00:52,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15622 to 12252. [2023-11-29 06:00:52,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12252 states, 8821 states have (on average 1.5685296451649473) internal successors, (13836), 8858 states have internal predecessors, (13836), 3281 states have call successors, (3281), 149 states have call predecessors, (3281), 149 states have return successors, (3281), 3244 states have call predecessors, (3281), 3281 states have call successors, (3281) [2023-11-29 06:00:52,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12252 states to 12252 states and 20398 transitions. [2023-11-29 06:00:52,883 INFO L78 Accepts]: Start accepts. Automaton has 12252 states and 20398 transitions. Word has length 618 [2023-11-29 06:00:52,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:00:52,884 INFO L495 AbstractCegarLoop]: Abstraction has 12252 states and 20398 transitions. [2023-11-29 06:00:52,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 5 states have internal predecessors, (136), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:00:52,884 INFO L276 IsEmpty]: Start isEmpty. Operand 12252 states and 20398 transitions. [2023-11-29 06:00:52,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2023-11-29 06:00:52,892 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:00:52,892 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:00:52,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:00:53,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:00:53,093 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:00:53,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:00:53,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1680673712, now seen corresponding path program 1 times [2023-11-29 06:00:53,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:00:53,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122111042] [2023-11-29 06:00:53,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:00:53,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:00:53,147 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:00:53,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941657903] [2023-11-29 06:00:53,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:00:53,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:00:53,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:00:53,149 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:00:53,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:00:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:00:53,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:00:53,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:00:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 06:00:54,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:00:54,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:00:54,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122111042] [2023-11-29 06:00:54,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:00:54,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941657903] [2023-11-29 06:00:54,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941657903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:00:54,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:00:54,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:00:54,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804461729] [2023-11-29 06:00:54,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:00:54,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:00:54,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:00:54,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:00:54,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:00:54,126 INFO L87 Difference]: Start difference. First operand 12252 states and 20398 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:00:57,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:00:57,315 INFO L93 Difference]: Finished difference Result 32927 states and 54652 transitions. [2023-11-29 06:00:57,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:00:57,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 619 [2023-11-29 06:00:57,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:00:57,354 INFO L225 Difference]: With dead ends: 32927 [2023-11-29 06:00:57,354 INFO L226 Difference]: Without dead ends: 20757 [2023-11-29 06:00:57,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:00:57,370 INFO L413 NwaCegarLoop]: 882 mSDtfsCounter, 1051 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:00:57,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1051 Valid, 1801 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 06:00:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20757 states. [2023-11-29 06:00:59,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20757 to 17864. [2023-11-29 06:00:59,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17864 states, 12937 states have (on average 1.57169359202288) internal successors, (20333), 12990 states have internal predecessors, (20333), 4713 states have call successors, (4713), 213 states have call predecessors, (4713), 213 states have return successors, (4713), 4660 states have call predecessors, (4713), 4713 states have call successors, (4713) [2023-11-29 06:00:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17864 states to 17864 states and 29759 transitions. [2023-11-29 06:00:59,771 INFO L78 Accepts]: Start accepts. Automaton has 17864 states and 29759 transitions. Word has length 619 [2023-11-29 06:00:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:00:59,772 INFO L495 AbstractCegarLoop]: Abstraction has 17864 states and 29759 transitions. [2023-11-29 06:00:59,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:00:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 17864 states and 29759 transitions. [2023-11-29 06:00:59,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2023-11-29 06:00:59,780 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:00:59,780 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:00:59,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:00:59,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:00:59,981 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:00:59,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:00:59,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1443677655, now seen corresponding path program 1 times [2023-11-29 06:00:59,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:00:59,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992601271] [2023-11-29 06:00:59,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:00:59,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:00,028 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:00,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764784468] [2023-11-29 06:01:00,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:00,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:00,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:00,029 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:00,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:01:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:00,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:01:00,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 06:01:00,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:01:00,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:00,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992601271] [2023-11-29 06:01:00,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:00,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764784468] [2023-11-29 06:01:00,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764784468] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:01:00,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:01:00,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:01:00,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039982102] [2023-11-29 06:01:00,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:01:00,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:01:00,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:00,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:01:00,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:01:00,400 INFO L87 Difference]: Start difference. First operand 17864 states and 29759 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:01:02,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:02,368 INFO L93 Difference]: Finished difference Result 28391 states and 47308 transitions. [2023-11-29 06:01:02,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:01:02,369 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 619 [2023-11-29 06:01:02,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:02,412 INFO L225 Difference]: With dead ends: 28391 [2023-11-29 06:01:02,412 INFO L226 Difference]: Without dead ends: 21992 [2023-11-29 06:01:02,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 616 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:01:02,428 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 300 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:02,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 1179 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:01:02,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21992 states. [2023-11-29 06:01:05,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21992 to 21938. [2023-11-29 06:01:05,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21938 states, 16257 states have (on average 1.5852248262287014) internal successors, (25771), 16336 states have internal predecessors, (25771), 5441 states have call successors, (5441), 239 states have call predecessors, (5441), 239 states have return successors, (5441), 5362 states have call predecessors, (5441), 5441 states have call successors, (5441) [2023-11-29 06:01:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21938 states to 21938 states and 36653 transitions. [2023-11-29 06:01:05,168 INFO L78 Accepts]: Start accepts. Automaton has 21938 states and 36653 transitions. Word has length 619 [2023-11-29 06:01:05,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:01:05,168 INFO L495 AbstractCegarLoop]: Abstraction has 21938 states and 36653 transitions. [2023-11-29 06:01:05,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:01:05,168 INFO L276 IsEmpty]: Start isEmpty. Operand 21938 states and 36653 transitions. [2023-11-29 06:01:05,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 621 [2023-11-29 06:01:05,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:05,176 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:01:05,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 06:01:05,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:05,377 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:05,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:05,378 INFO L85 PathProgramCache]: Analyzing trace with hash 213868717, now seen corresponding path program 1 times [2023-11-29 06:01:05,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:05,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970072705] [2023-11-29 06:01:05,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:05,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:05,435 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:05,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489062562] [2023-11-29 06:01:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:05,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:05,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:05,436 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:05,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:01:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:05,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 1419 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:01:05,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 06:01:06,370 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:01:06,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:06,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970072705] [2023-11-29 06:01:06,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:06,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489062562] [2023-11-29 06:01:06,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489062562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:01:06,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:01:06,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:01:06,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942149843] [2023-11-29 06:01:06,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:01:06,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:01:06,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:06,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:01:06,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:01:06,373 INFO L87 Difference]: Start difference. First operand 21938 states and 36653 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:01:13,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:13,024 INFO L93 Difference]: Finished difference Result 84721 states and 141452 transitions. [2023-11-29 06:01:13,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:01:13,025 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 620 [2023-11-29 06:01:13,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:13,164 INFO L225 Difference]: With dead ends: 84721 [2023-11-29 06:01:13,164 INFO L226 Difference]: Without dead ends: 62895 [2023-11-29 06:01:13,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:01:13,207 INFO L413 NwaCegarLoop]: 1357 mSDtfsCounter, 1858 mSDsluCounter, 3556 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1858 SdHoareTripleChecker+Valid, 4913 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:13,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1858 Valid, 4913 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 06:01:13,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62895 states. [2023-11-29 06:01:19,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62895 to 41633. [2023-11-29 06:01:19,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41633 states, 29932 states have (on average 1.5317720165708941) internal successors, (45849), 30153 states have internal predecessors, (45849), 11263 states have call successors, (11263), 437 states have call predecessors, (11263), 437 states have return successors, (11263), 11042 states have call predecessors, (11263), 11263 states have call successors, (11263) [2023-11-29 06:01:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41633 states to 41633 states and 68375 transitions. [2023-11-29 06:01:19,634 INFO L78 Accepts]: Start accepts. Automaton has 41633 states and 68375 transitions. Word has length 620 [2023-11-29 06:01:19,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:01:19,635 INFO L495 AbstractCegarLoop]: Abstraction has 41633 states and 68375 transitions. [2023-11-29 06:01:19,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:01:19,635 INFO L276 IsEmpty]: Start isEmpty. Operand 41633 states and 68375 transitions. [2023-11-29 06:01:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 621 [2023-11-29 06:01:19,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:19,646 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:01:19,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 06:01:19,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:01:19,847 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:19,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:19,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1167808875, now seen corresponding path program 1 times [2023-11-29 06:01:19,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:19,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902741063] [2023-11-29 06:01:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:19,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:19,898 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:19,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579410446] [2023-11-29 06:01:19,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:19,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:19,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:19,899 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:19,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:01:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:20,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:01:20,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 06:01:20,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:01:20,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:20,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902741063] [2023-11-29 06:01:20,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:20,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579410446] [2023-11-29 06:01:20,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579410446] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:01:20,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:01:20,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:01:20,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744536216] [2023-11-29 06:01:20,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:01:20,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:01:20,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:20,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:01:20,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:01:20,322 INFO L87 Difference]: Start difference. First operand 41633 states and 68375 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:01:24,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:24,853 INFO L93 Difference]: Finished difference Result 91357 states and 150870 transitions. [2023-11-29 06:01:24,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:01:24,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 620 [2023-11-29 06:01:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:24,967 INFO L225 Difference]: With dead ends: 91357 [2023-11-29 06:01:24,967 INFO L226 Difference]: Without dead ends: 49836 [2023-11-29 06:01:25,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:01:25,036 INFO L413 NwaCegarLoop]: 688 mSDtfsCounter, 295 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:25,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 1168 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:01:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49836 states. [2023-11-29 06:01:29,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49836 to 37314. [2023-11-29 06:01:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37314 states, 31144 states have (on average 1.6476367839712305) internal successors, (51314), 31229 states have internal predecessors, (51314), 5855 states have call successors, (5855), 314 states have call predecessors, (5855), 314 states have return successors, (5855), 5770 states have call predecessors, (5855), 5855 states have call successors, (5855) [2023-11-29 06:01:29,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37314 states to 37314 states and 63024 transitions. [2023-11-29 06:01:29,238 INFO L78 Accepts]: Start accepts. Automaton has 37314 states and 63024 transitions. Word has length 620 [2023-11-29 06:01:29,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:01:29,239 INFO L495 AbstractCegarLoop]: Abstraction has 37314 states and 63024 transitions. [2023-11-29 06:01:29,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:01:29,239 INFO L276 IsEmpty]: Start isEmpty. Operand 37314 states and 63024 transitions. [2023-11-29 06:01:29,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 621 [2023-11-29 06:01:29,250 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:29,251 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:01:29,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 06:01:29,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:01:29,451 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:29,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:29,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1579917989, now seen corresponding path program 1 times [2023-11-29 06:01:29,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:29,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836179335] [2023-11-29 06:01:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:29,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:29,499 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:29,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673039855] [2023-11-29 06:01:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:29,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:29,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:29,501 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:29,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 06:01:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:29,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:01:29,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 06:01:30,520 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:01:30,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:30,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836179335] [2023-11-29 06:01:30,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:30,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673039855] [2023-11-29 06:01:30,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673039855] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:01:30,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:01:30,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:01:30,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312108207] [2023-11-29 06:01:30,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:01:30,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:01:30,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:30,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:01:30,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:01:30,523 INFO L87 Difference]: Start difference. First operand 37314 states and 63024 transitions. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:01:39,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:39,119 INFO L93 Difference]: Finished difference Result 100718 states and 166774 transitions. [2023-11-29 06:01:39,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:01:39,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 620 [2023-11-29 06:01:39,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:39,258 INFO L225 Difference]: With dead ends: 100718 [2023-11-29 06:01:39,258 INFO L226 Difference]: Without dead ends: 63520 [2023-11-29 06:01:39,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 617 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:01:39,305 INFO L413 NwaCegarLoop]: 965 mSDtfsCounter, 1201 mSDsluCounter, 2415 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:39,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1201 Valid, 3380 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 06:01:39,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63520 states. [2023-11-29 06:01:44,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63520 to 38074. [2023-11-29 06:01:44,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38074 states, 31904 states have (on average 1.650514042126379) internal successors, (52658), 31989 states have internal predecessors, (52658), 5855 states have call successors, (5855), 314 states have call predecessors, (5855), 314 states have return successors, (5855), 5770 states have call predecessors, (5855), 5855 states have call successors, (5855) [2023-11-29 06:01:44,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38074 states to 38074 states and 64368 transitions. [2023-11-29 06:01:44,766 INFO L78 Accepts]: Start accepts. Automaton has 38074 states and 64368 transitions. Word has length 620 [2023-11-29 06:01:44,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:01:44,766 INFO L495 AbstractCegarLoop]: Abstraction has 38074 states and 64368 transitions. [2023-11-29 06:01:44,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:01:44,767 INFO L276 IsEmpty]: Start isEmpty. Operand 38074 states and 64368 transitions. [2023-11-29 06:01:44,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 621 [2023-11-29 06:01:44,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:44,778 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:01:44,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-29 06:01:44,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:44,979 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:44,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:44,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1668870143, now seen corresponding path program 1 times [2023-11-29 06:01:44,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:44,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332354025] [2023-11-29 06:01:44,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:44,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:45,026 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:45,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374586062] [2023-11-29 06:01:45,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:45,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:45,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:45,028 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:45,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 06:01:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:45,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:01:45,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 06:01:45,519 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:01:45,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:45,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332354025] [2023-11-29 06:01:45,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:45,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374586062] [2023-11-29 06:01:45,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374586062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:01:45,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:01:45,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:01:45,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902994853] [2023-11-29 06:01:45,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:01:45,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:01:45,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:45,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:01:45,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:01:45,521 INFO L87 Difference]: Start difference. First operand 38074 states and 64368 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:01:51,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:51,553 INFO L93 Difference]: Finished difference Result 65961 states and 110467 transitions. [2023-11-29 06:01:51,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:01:51,554 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 620 [2023-11-29 06:01:51,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:51,628 INFO L225 Difference]: With dead ends: 65961 [2023-11-29 06:01:51,629 INFO L226 Difference]: Without dead ends: 41564 [2023-11-29 06:01:51,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 616 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:01:51,649 INFO L413 NwaCegarLoop]: 834 mSDtfsCounter, 921 mSDsluCounter, 2008 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 2842 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:51,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [921 Valid, 2842 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:01:51,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41564 states. [2023-11-29 06:01:54,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41564 to 22558. [2023-11-29 06:01:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22558 states, 19004 states have (on average 1.6434434855819828) internal successors, (31232), 19053 states have internal predecessors, (31232), 3371 states have call successors, (3371), 182 states have call predecessors, (3371), 182 states have return successors, (3371), 3322 states have call predecessors, (3371), 3371 states have call successors, (3371) [2023-11-29 06:01:54,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22558 states to 22558 states and 37974 transitions. [2023-11-29 06:01:54,570 INFO L78 Accepts]: Start accepts. Automaton has 22558 states and 37974 transitions. Word has length 620 [2023-11-29 06:01:54,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:01:54,570 INFO L495 AbstractCegarLoop]: Abstraction has 22558 states and 37974 transitions. [2023-11-29 06:01:54,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:01:54,571 INFO L276 IsEmpty]: Start isEmpty. Operand 22558 states and 37974 transitions. [2023-11-29 06:01:54,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2023-11-29 06:01:54,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:54,580 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:01:54,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 06:01:54,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:54,781 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:54,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:54,781 INFO L85 PathProgramCache]: Analyzing trace with hash -226245142, now seen corresponding path program 1 times [2023-11-29 06:01:54,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:54,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878178367] [2023-11-29 06:01:54,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:54,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:54,821 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:54,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908558572] [2023-11-29 06:01:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:54,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:54,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:54,822 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:54,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 06:01:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:55,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:01:55,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 9318 proven. 129 refuted. 0 times theorem prover too weak. 9177 trivial. 0 not checked. [2023-11-29 06:01:55,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:01:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 159 proven. 129 refuted. 0 times theorem prover too weak. 18336 trivial. 0 not checked. [2023-11-29 06:01:55,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:55,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878178367] [2023-11-29 06:01:55,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:55,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908558572] [2023-11-29 06:01:55,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908558572] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:01:55,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:01:55,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 06:01:55,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330685982] [2023-11-29 06:01:55,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:01:55,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:01:55,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:55,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:01:55,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:01:55,742 INFO L87 Difference]: Start difference. First operand 22558 states and 37974 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (140), 2 states have call predecessors, (140), 4 states have return successors, (141), 2 states have call predecessors, (141), 2 states have call successors, (141) [2023-11-29 06:01:58,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:58,317 INFO L93 Difference]: Finished difference Result 40298 states and 67385 transitions. [2023-11-29 06:01:58,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:01:58,317 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (140), 2 states have call predecessors, (140), 4 states have return successors, (141), 2 states have call predecessors, (141), 2 states have call successors, (141) Word has length 621 [2023-11-29 06:01:58,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:58,343 INFO L225 Difference]: With dead ends: 40298 [2023-11-29 06:01:58,343 INFO L226 Difference]: Without dead ends: 17856 [2023-11-29 06:01:58,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1244 GetRequests, 1234 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:01:58,358 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 599 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:58,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 978 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:01:58,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17856 states. [2023-11-29 06:02:00,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17856 to 8104. [2023-11-29 06:02:00,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8104 states, 5923 states have (on average 1.5436434239405707) internal successors, (9143), 5940 states have internal predecessors, (9143), 2050 states have call successors, (2050), 130 states have call predecessors, (2050), 130 states have return successors, (2050), 2033 states have call predecessors, (2050), 2050 states have call successors, (2050) [2023-11-29 06:02:00,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8104 states to 8104 states and 13243 transitions. [2023-11-29 06:02:00,380 INFO L78 Accepts]: Start accepts. Automaton has 8104 states and 13243 transitions. Word has length 621 [2023-11-29 06:02:00,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:00,380 INFO L495 AbstractCegarLoop]: Abstraction has 8104 states and 13243 transitions. [2023-11-29 06:02:00,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (140), 2 states have call predecessors, (140), 4 states have return successors, (141), 2 states have call predecessors, (141), 2 states have call successors, (141) [2023-11-29 06:02:00,381 INFO L276 IsEmpty]: Start isEmpty. Operand 8104 states and 13243 transitions. [2023-11-29 06:02:00,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2023-11-29 06:02:00,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:00,386 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:00,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 06:02:00,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:00,586 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:00,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:00,587 INFO L85 PathProgramCache]: Analyzing trace with hash -452970388, now seen corresponding path program 1 times [2023-11-29 06:02:00,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:00,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864371093] [2023-11-29 06:02:00,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:00,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:00,638 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:00,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814014652] [2023-11-29 06:02:00,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:00,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:00,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:00,640 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:00,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 06:02:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:01,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 1419 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:02:01,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 06:02:01,642 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:02:01,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:01,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864371093] [2023-11-29 06:02:01,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:01,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814014652] [2023-11-29 06:02:01,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814014652] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:02:01,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:02:01,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:02:01,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274113029] [2023-11-29 06:02:01,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:02:01,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:02:01,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:01,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:02:01,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:02:01,646 INFO L87 Difference]: Start difference. First operand 8104 states and 13243 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:02:04,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:04,399 INFO L93 Difference]: Finished difference Result 19926 states and 32866 transitions. [2023-11-29 06:02:04,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:02:04,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 622 [2023-11-29 06:02:04,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:04,419 INFO L225 Difference]: With dead ends: 19926 [2023-11-29 06:02:04,420 INFO L226 Difference]: Without dead ends: 11100 [2023-11-29 06:02:04,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 616 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:02:04,432 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 1178 mSDsluCounter, 1844 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 2436 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:04,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1178 Valid, 2436 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 06:02:04,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11100 states. [2023-11-29 06:02:06,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11100 to 8188. [2023-11-29 06:02:06,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8188 states, 6007 states have (on average 1.5446978525054103) internal successors, (9279), 6024 states have internal predecessors, (9279), 2050 states have call successors, (2050), 130 states have call predecessors, (2050), 130 states have return successors, (2050), 2033 states have call predecessors, (2050), 2050 states have call successors, (2050) [2023-11-29 06:02:06,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8188 states to 8188 states and 13379 transitions. [2023-11-29 06:02:06,276 INFO L78 Accepts]: Start accepts. Automaton has 8188 states and 13379 transitions. Word has length 622 [2023-11-29 06:02:06,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:06,277 INFO L495 AbstractCegarLoop]: Abstraction has 8188 states and 13379 transitions. [2023-11-29 06:02:06,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:02:06,277 INFO L276 IsEmpty]: Start isEmpty. Operand 8188 states and 13379 transitions. [2023-11-29 06:02:06,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2023-11-29 06:02:06,281 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:06,281 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:06,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 06:02:06,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 06:02:06,482 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:06,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:06,483 INFO L85 PathProgramCache]: Analyzing trace with hash 446896934, now seen corresponding path program 1 times [2023-11-29 06:02:06,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:06,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571173681] [2023-11-29 06:02:06,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:06,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:06,535 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:06,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772069156] [2023-11-29 06:02:06,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:06,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:06,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:06,536 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:06,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 06:02:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:06,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 1423 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:02:06,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:07,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 06:02:07,673 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:02:07,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:07,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571173681] [2023-11-29 06:02:07,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:07,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772069156] [2023-11-29 06:02:07,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772069156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:02:07,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:02:07,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:02:07,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332114461] [2023-11-29 06:02:07,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:02:07,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:02:07,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:07,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:02:07,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:02:07,675 INFO L87 Difference]: Start difference. First operand 8188 states and 13379 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:02:09,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:09,958 INFO L93 Difference]: Finished difference Result 16982 states and 27938 transitions. [2023-11-29 06:02:09,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:02:09,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 622 [2023-11-29 06:02:09,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:09,974 INFO L225 Difference]: With dead ends: 16982 [2023-11-29 06:02:09,974 INFO L226 Difference]: Without dead ends: 7900 [2023-11-29 06:02:09,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 616 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:02:09,986 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 813 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:09,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 2034 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:02:09,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7900 states. [2023-11-29 06:02:11,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7900 to 6138. [2023-11-29 06:02:11,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6138 states, 4489 states have (on average 1.5439964357317888) internal successors, (6931), 4502 states have internal predecessors, (6931), 1550 states have call successors, (1550), 98 states have call predecessors, (1550), 98 states have return successors, (1550), 1537 states have call predecessors, (1550), 1550 states have call successors, (1550) [2023-11-29 06:02:11,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6138 states to 6138 states and 10031 transitions. [2023-11-29 06:02:11,358 INFO L78 Accepts]: Start accepts. Automaton has 6138 states and 10031 transitions. Word has length 622 [2023-11-29 06:02:11,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:11,359 INFO L495 AbstractCegarLoop]: Abstraction has 6138 states and 10031 transitions. [2023-11-29 06:02:11,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:02:11,359 INFO L276 IsEmpty]: Start isEmpty. Operand 6138 states and 10031 transitions. [2023-11-29 06:02:11,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2023-11-29 06:02:11,363 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:11,364 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:11,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 06:02:11,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 06:02:11,564 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:11,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:11,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1076435027, now seen corresponding path program 1 times [2023-11-29 06:02:11,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:11,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212115387] [2023-11-29 06:02:11,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:11,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:11,609 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:11,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049728650] [2023-11-29 06:02:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:11,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:11,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:11,610 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:11,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 06:02:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:11,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:02:12,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 06:02:12,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:02:12,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:12,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212115387] [2023-11-29 06:02:12,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:12,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049728650] [2023-11-29 06:02:12,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049728650] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:02:12,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:02:12,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:02:12,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218742482] [2023-11-29 06:02:12,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:02:12,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:02:12,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:12,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:02:12,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:02:12,483 INFO L87 Difference]: Start difference. First operand 6138 states and 10031 transitions. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:02:15,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:15,049 INFO L93 Difference]: Finished difference Result 14236 states and 23242 transitions. [2023-11-29 06:02:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:02:15,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 623 [2023-11-29 06:02:15,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:15,064 INFO L225 Difference]: With dead ends: 14236 [2023-11-29 06:02:15,064 INFO L226 Difference]: Without dead ends: 8184 [2023-11-29 06:02:15,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 619 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:02:15,076 INFO L413 NwaCegarLoop]: 892 mSDtfsCounter, 820 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 2120 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:15,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 2120 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:02:15,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8184 states. [2023-11-29 06:02:16,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8184 to 8180. [2023-11-29 06:02:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8180 states, 5999 states have (on average 1.5374229038173028) internal successors, (9223), 6016 states have internal predecessors, (9223), 2050 states have call successors, (2050), 130 states have call predecessors, (2050), 130 states have return successors, (2050), 2033 states have call predecessors, (2050), 2050 states have call successors, (2050) [2023-11-29 06:02:16,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8180 states to 8180 states and 13323 transitions. [2023-11-29 06:02:16,943 INFO L78 Accepts]: Start accepts. Automaton has 8180 states and 13323 transitions. Word has length 623 [2023-11-29 06:02:16,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:16,944 INFO L495 AbstractCegarLoop]: Abstraction has 8180 states and 13323 transitions. [2023-11-29 06:02:16,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:02:16,944 INFO L276 IsEmpty]: Start isEmpty. Operand 8180 states and 13323 transitions. [2023-11-29 06:02:16,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2023-11-29 06:02:16,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:16,949 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:16,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 06:02:17,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 06:02:17,150 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:17,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:17,150 INFO L85 PathProgramCache]: Analyzing trace with hash 184482223, now seen corresponding path program 1 times [2023-11-29 06:02:17,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:17,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886450645] [2023-11-29 06:02:17,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:17,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:17,195 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:17,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134233455] [2023-11-29 06:02:17,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:17,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:17,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:17,196 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:17,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 06:02:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:17,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:02:17,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 9276 proven. 126 refuted. 0 times theorem prover too weak. 9222 trivial. 0 not checked. [2023-11-29 06:02:18,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:02:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 162 proven. 126 refuted. 0 times theorem prover too weak. 18336 trivial. 0 not checked. [2023-11-29 06:02:18,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:18,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886450645] [2023-11-29 06:02:18,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:18,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134233455] [2023-11-29 06:02:18,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134233455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:02:18,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:02:18,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-29 06:02:18,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591843277] [2023-11-29 06:02:18,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:02:18,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:02:18,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:18,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:02:18,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:02:18,982 INFO L87 Difference]: Start difference. First operand 8180 states and 13323 transitions. Second operand has 10 states, 10 states have (on average 23.5) internal successors, (235), 10 states have internal predecessors, (235), 4 states have call successors, (194), 3 states have call predecessors, (194), 5 states have return successors, (194), 4 states have call predecessors, (194), 4 states have call successors, (194) [2023-11-29 06:02:26,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:26,291 INFO L93 Difference]: Finished difference Result 30131 states and 49403 transitions. [2023-11-29 06:02:26,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:02:26,292 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 23.5) internal successors, (235), 10 states have internal predecessors, (235), 4 states have call successors, (194), 3 states have call predecessors, (194), 5 states have return successors, (194), 4 states have call predecessors, (194), 4 states have call successors, (194) Word has length 623 [2023-11-29 06:02:26,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:26,331 INFO L225 Difference]: With dead ends: 30131 [2023-11-29 06:02:26,331 INFO L226 Difference]: Without dead ends: 22037 [2023-11-29 06:02:26,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1253 GetRequests, 1238 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:02:26,347 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 2944 mSDsluCounter, 1892 mSDsCounter, 0 mSdLazyCounter, 1662 mSolverCounterSat, 733 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3095 SdHoareTripleChecker+Valid, 2322 SdHoareTripleChecker+Invalid, 2395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 733 IncrementalHoareTripleChecker+Valid, 1662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:26,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3095 Valid, 2322 Invalid, 2395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [733 Valid, 1662 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 06:02:26,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22037 states. [2023-11-29 06:02:29,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22037 to 11597. [2023-11-29 06:02:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11597 states, 8565 states have (on average 1.5510799766491534) internal successors, (13285), 8587 states have internal predecessors, (13285), 2847 states have call successors, (2847), 184 states have call predecessors, (2847), 184 states have return successors, (2847), 2825 states have call predecessors, (2847), 2847 states have call successors, (2847) [2023-11-29 06:02:29,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11597 states to 11597 states and 18979 transitions. [2023-11-29 06:02:29,313 INFO L78 Accepts]: Start accepts. Automaton has 11597 states and 18979 transitions. Word has length 623 [2023-11-29 06:02:29,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:29,314 INFO L495 AbstractCegarLoop]: Abstraction has 11597 states and 18979 transitions. [2023-11-29 06:02:29,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.5) internal successors, (235), 10 states have internal predecessors, (235), 4 states have call successors, (194), 3 states have call predecessors, (194), 5 states have return successors, (194), 4 states have call predecessors, (194), 4 states have call successors, (194) [2023-11-29 06:02:29,314 INFO L276 IsEmpty]: Start isEmpty. Operand 11597 states and 18979 transitions. [2023-11-29 06:02:29,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2023-11-29 06:02:29,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:29,319 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:29,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 06:02:29,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 06:02:29,520 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:29,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:29,520 INFO L85 PathProgramCache]: Analyzing trace with hash -918319875, now seen corresponding path program 1 times [2023-11-29 06:02:29,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:29,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542631981] [2023-11-29 06:02:29,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:29,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:29,559 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:29,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281935150] [2023-11-29 06:02:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:29,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:29,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:29,561 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:29,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 06:02:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:29,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:02:29,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 11971 proven. 126 refuted. 0 times theorem prover too weak. 6527 trivial. 0 not checked. [2023-11-29 06:02:30,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:02:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 162 proven. 126 refuted. 0 times theorem prover too weak. 18336 trivial. 0 not checked. [2023-11-29 06:02:31,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:31,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542631981] [2023-11-29 06:02:31,012 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:31,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281935150] [2023-11-29 06:02:31,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281935150] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:02:31,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:02:31,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-29 06:02:31,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538396552] [2023-11-29 06:02:31,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:02:31,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:02:31,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:31,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:02:31,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:02:31,015 INFO L87 Difference]: Start difference. First operand 11597 states and 18979 transitions. Second operand has 11 states, 11 states have (on average 18.545454545454547) internal successors, (204), 11 states have internal predecessors, (204), 4 states have call successors, (159), 3 states have call predecessors, (159), 5 states have return successors, (159), 4 states have call predecessors, (159), 4 states have call successors, (159) [2023-11-29 06:02:36,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:36,485 INFO L93 Difference]: Finished difference Result 25147 states and 41073 transitions. [2023-11-29 06:02:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:02:36,485 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 18.545454545454547) internal successors, (204), 11 states have internal predecessors, (204), 4 states have call successors, (159), 3 states have call predecessors, (159), 5 states have return successors, (159), 4 states have call predecessors, (159), 4 states have call successors, (159) Word has length 623 [2023-11-29 06:02:36,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:36,516 INFO L225 Difference]: With dead ends: 25147 [2023-11-29 06:02:36,516 INFO L226 Difference]: Without dead ends: 16771 [2023-11-29 06:02:36,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1258 GetRequests, 1236 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:02:36,530 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 2002 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 1212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2056 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 2366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1212 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:36,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2056 Valid, 1801 Invalid, 2366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1212 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 06:02:36,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16771 states. [2023-11-29 06:02:38,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16771 to 9652. [2023-11-29 06:02:38,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9652 states, 7205 states have (on average 1.5582234559333796) internal successors, (11227), 7224 states have internal predecessors, (11227), 2300 states have call successors, (2300), 146 states have call predecessors, (2300), 146 states have return successors, (2300), 2281 states have call predecessors, (2300), 2300 states have call successors, (2300) [2023-11-29 06:02:38,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9652 states to 9652 states and 15827 transitions. [2023-11-29 06:02:38,952 INFO L78 Accepts]: Start accepts. Automaton has 9652 states and 15827 transitions. Word has length 623 [2023-11-29 06:02:38,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:38,953 INFO L495 AbstractCegarLoop]: Abstraction has 9652 states and 15827 transitions. [2023-11-29 06:02:38,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.545454545454547) internal successors, (204), 11 states have internal predecessors, (204), 4 states have call successors, (159), 3 states have call predecessors, (159), 5 states have return successors, (159), 4 states have call predecessors, (159), 4 states have call successors, (159) [2023-11-29 06:02:38,953 INFO L276 IsEmpty]: Start isEmpty. Operand 9652 states and 15827 transitions. [2023-11-29 06:02:38,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2023-11-29 06:02:38,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:38,958 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:38,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 06:02:39,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 06:02:39,158 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:39,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:39,159 INFO L85 PathProgramCache]: Analyzing trace with hash -246330459, now seen corresponding path program 1 times [2023-11-29 06:02:39,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:39,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582982805] [2023-11-29 06:02:39,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:39,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:39,204 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:39,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890688625] [2023-11-29 06:02:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:39,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:39,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:39,205 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:39,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 06:02:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:39,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 1423 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:02:39,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 06:02:40,329 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:02:40,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:40,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582982805] [2023-11-29 06:02:40,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:40,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890688625] [2023-11-29 06:02:40,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890688625] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:02:40,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:02:40,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:02:40,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301983951] [2023-11-29 06:02:40,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:02:40,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:02:40,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:40,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:02:40,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:02:40,332 INFO L87 Difference]: Start difference. First operand 9652 states and 15827 transitions. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 5 states have internal predecessors, (141), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:02:43,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:43,665 INFO L93 Difference]: Finished difference Result 21301 states and 35420 transitions. [2023-11-29 06:02:43,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:02:43,665 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 5 states have internal predecessors, (141), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 623 [2023-11-29 06:02:43,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:43,687 INFO L225 Difference]: With dead ends: 21301 [2023-11-29 06:02:43,687 INFO L226 Difference]: Without dead ends: 14931 [2023-11-29 06:02:43,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:02:43,696 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 982 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 2264 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:43,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [982 Valid, 2264 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 06:02:43,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14931 states. [2023-11-29 06:02:45,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14931 to 10294. [2023-11-29 06:02:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10294 states, 7847 states have (on average 1.5811138014527846) internal successors, (12407), 7866 states have internal predecessors, (12407), 2300 states have call successors, (2300), 146 states have call predecessors, (2300), 146 states have return successors, (2300), 2281 states have call predecessors, (2300), 2300 states have call successors, (2300) [2023-11-29 06:02:45,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10294 states to 10294 states and 17007 transitions. [2023-11-29 06:02:45,875 INFO L78 Accepts]: Start accepts. Automaton has 10294 states and 17007 transitions. Word has length 623 [2023-11-29 06:02:45,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:45,876 INFO L495 AbstractCegarLoop]: Abstraction has 10294 states and 17007 transitions. [2023-11-29 06:02:45,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 5 states have internal predecessors, (141), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:02:45,876 INFO L276 IsEmpty]: Start isEmpty. Operand 10294 states and 17007 transitions. [2023-11-29 06:02:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2023-11-29 06:02:45,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:45,882 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:45,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 06:02:46,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 06:02:46,083 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:46,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:46,083 INFO L85 PathProgramCache]: Analyzing trace with hash 653536863, now seen corresponding path program 1 times [2023-11-29 06:02:46,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:46,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642838680] [2023-11-29 06:02:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:46,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:46,138 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:46,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409177777] [2023-11-29 06:02:46,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:46,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:46,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:46,140 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:46,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 06:02:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:46,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:02:46,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 06:02:47,333 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:02:47,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:47,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642838680] [2023-11-29 06:02:47,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:47,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409177777] [2023-11-29 06:02:47,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409177777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:02:47,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:02:47,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:02:47,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174646273] [2023-11-29 06:02:47,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:02:47,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:02:47,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:47,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:02:47,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:02:47,335 INFO L87 Difference]: Start difference. First operand 10294 states and 17007 transitions. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 5 states have internal predecessors, (141), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:02:50,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:50,340 INFO L93 Difference]: Finished difference Result 19107 states and 31844 transitions. [2023-11-29 06:02:50,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:02:50,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 5 states have internal predecessors, (141), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 623 [2023-11-29 06:02:50,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:50,360 INFO L225 Difference]: With dead ends: 19107 [2023-11-29 06:02:50,360 INFO L226 Difference]: Without dead ends: 12065 [2023-11-29 06:02:50,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:02:50,369 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 800 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 1978 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:50,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [800 Valid, 1978 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:02:50,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12065 states. [2023-11-29 06:02:52,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12065 to 9191. [2023-11-29 06:02:52,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9191 states, 7143 states have (on average 1.602267954640907) internal successors, (11445), 7159 states have internal predecessors, (11445), 1925 states have call successors, (1925), 122 states have call predecessors, (1925), 122 states have return successors, (1925), 1909 states have call predecessors, (1925), 1925 states have call successors, (1925) [2023-11-29 06:02:52,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9191 states to 9191 states and 15295 transitions. [2023-11-29 06:02:52,337 INFO L78 Accepts]: Start accepts. Automaton has 9191 states and 15295 transitions. Word has length 623 [2023-11-29 06:02:52,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:52,337 INFO L495 AbstractCegarLoop]: Abstraction has 9191 states and 15295 transitions. [2023-11-29 06:02:52,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 5 states have internal predecessors, (141), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:02:52,337 INFO L276 IsEmpty]: Start isEmpty. Operand 9191 states and 15295 transitions. [2023-11-29 06:02:52,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2023-11-29 06:02:52,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:52,343 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:52,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 06:02:52,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 06:02:52,543 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:52,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:52,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1160005179, now seen corresponding path program 1 times [2023-11-29 06:02:52,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:52,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103438342] [2023-11-29 06:02:52,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:52,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:52,587 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:52,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532515731] [2023-11-29 06:02:52,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:52,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:52,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:52,588 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:52,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 06:02:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:53,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:02:53,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 9066 proven. 171 refuted. 0 times theorem prover too weak. 9387 trivial. 0 not checked. [2023-11-29 06:02:54,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:02:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 117 proven. 171 refuted. 0 times theorem prover too weak. 18336 trivial. 0 not checked. [2023-11-29 06:02:55,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:55,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103438342] [2023-11-29 06:02:55,470 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:55,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532515731] [2023-11-29 06:02:55,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532515731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:02:55,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:02:55,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2023-11-29 06:02:55,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852019261] [2023-11-29 06:02:55,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:02:55,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 06:02:55,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:55,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 06:02:55,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2023-11-29 06:02:55,474 INFO L87 Difference]: Start difference. First operand 9191 states and 15295 transitions. Second operand has 27 states, 27 states have (on average 9.592592592592593) internal successors, (259), 27 states have internal predecessors, (259), 4 states have call successors, (194), 3 states have call predecessors, (194), 5 states have return successors, (194), 4 states have call predecessors, (194), 4 states have call successors, (194) [2023-11-29 06:03:51,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:03:51,543 INFO L93 Difference]: Finished difference Result 104585 states and 168654 transitions. [2023-11-29 06:03:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 300 states. [2023-11-29 06:03:51,544 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 9.592592592592593) internal successors, (259), 27 states have internal predecessors, (259), 4 states have call successors, (194), 3 states have call predecessors, (194), 5 states have return successors, (194), 4 states have call predecessors, (194), 4 states have call successors, (194) Word has length 624 [2023-11-29 06:03:51,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:03:51,735 INFO L225 Difference]: With dead ends: 104585 [2023-11-29 06:03:51,735 INFO L226 Difference]: Without dead ends: 95480 [2023-11-29 06:03:51,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1595 GetRequests, 1284 SyntacticMatches, 0 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43656 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=14052, Invalid=83604, Unknown=0, NotChecked=0, Total=97656 [2023-11-29 06:03:51,798 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 13331 mSDsluCounter, 9030 mSDsCounter, 0 mSdLazyCounter, 9743 mSolverCounterSat, 5375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13509 SdHoareTripleChecker+Valid, 9674 SdHoareTripleChecker+Invalid, 15118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5375 IncrementalHoareTripleChecker+Valid, 9743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:03:51,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13509 Valid, 9674 Invalid, 15118 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5375 Valid, 9743 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2023-11-29 06:03:51,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95480 states. [2023-11-29 06:04:00,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95480 to 26735. [2023-11-29 06:04:00,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26735 states, 21442 states have (on average 1.6122096819326555) internal successors, (34569), 21549 states have internal predecessors, (34569), 5019 states have call successors, (5019), 273 states have call predecessors, (5019), 273 states have return successors, (5019), 4912 states have call predecessors, (5019), 5019 states have call successors, (5019) [2023-11-29 06:04:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26735 states to 26735 states and 44607 transitions. [2023-11-29 06:04:00,561 INFO L78 Accepts]: Start accepts. Automaton has 26735 states and 44607 transitions. Word has length 624 [2023-11-29 06:04:00,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:04:00,562 INFO L495 AbstractCegarLoop]: Abstraction has 26735 states and 44607 transitions. [2023-11-29 06:04:00,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 9.592592592592593) internal successors, (259), 27 states have internal predecessors, (259), 4 states have call successors, (194), 3 states have call predecessors, (194), 5 states have return successors, (194), 4 states have call predecessors, (194), 4 states have call successors, (194) [2023-11-29 06:04:00,562 INFO L276 IsEmpty]: Start isEmpty. Operand 26735 states and 44607 transitions. [2023-11-29 06:04:00,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2023-11-29 06:04:00,576 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:04:00,577 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:04:00,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 06:04:00,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 06:04:00,777 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:04:00,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:04:00,778 INFO L85 PathProgramCache]: Analyzing trace with hash 2004010681, now seen corresponding path program 1 times [2023-11-29 06:04:00,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:04:00,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053571456] [2023-11-29 06:04:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:04:00,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:04:00,822 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:04:00,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39290511] [2023-11-29 06:04:00,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:04:00,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:04:00,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:04:00,824 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:04:00,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 06:04:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:01,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:04:01,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:04:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 8538 proven. 99 refuted. 0 times theorem prover too weak. 9987 trivial. 0 not checked. [2023-11-29 06:04:01,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:04:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 06:04:01,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:04:01,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053571456] [2023-11-29 06:04:01,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:04:01,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39290511] [2023-11-29 06:04:01,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39290511] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:04:01,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:04:01,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-29 06:04:01,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253594882] [2023-11-29 06:04:01,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:04:01,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:04:01,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:04:01,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:04:01,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:04:01,746 INFO L87 Difference]: Start difference. First operand 26735 states and 44607 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:04:11,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:04:11,466 INFO L93 Difference]: Finished difference Result 67614 states and 112824 transitions. [2023-11-29 06:04:11,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:04:11,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 624 [2023-11-29 06:04:11,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:04:11,537 INFO L225 Difference]: With dead ends: 67614 [2023-11-29 06:04:11,537 INFO L226 Difference]: Without dead ends: 40977 [2023-11-29 06:04:11,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1246 GetRequests, 1241 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:04:11,568 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 274 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:04:11,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 1157 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:04:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40977 states. [2023-11-29 06:04:19,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40977 to 27205. [2023-11-29 06:04:19,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27205 states, 21912 states have (on average 1.6139558232931728) internal successors, (35365), 22019 states have internal predecessors, (35365), 5019 states have call successors, (5019), 273 states have call predecessors, (5019), 273 states have return successors, (5019), 4912 states have call predecessors, (5019), 5019 states have call successors, (5019) [2023-11-29 06:04:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27205 states to 27205 states and 45403 transitions. [2023-11-29 06:04:19,475 INFO L78 Accepts]: Start accepts. Automaton has 27205 states and 45403 transitions. Word has length 624 [2023-11-29 06:04:19,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:04:19,476 INFO L495 AbstractCegarLoop]: Abstraction has 27205 states and 45403 transitions. [2023-11-29 06:04:19,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:04:19,477 INFO L276 IsEmpty]: Start isEmpty. Operand 27205 states and 45403 transitions. [2023-11-29 06:04:19,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2023-11-29 06:04:19,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:04:19,491 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:04:19,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 06:04:19,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:04:19,692 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:04:19,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:04:19,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1252699096, now seen corresponding path program 1 times [2023-11-29 06:04:19,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:04:19,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117450217] [2023-11-29 06:04:19,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:04:19,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:04:19,745 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:04:19,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624554554] [2023-11-29 06:04:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:04:19,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:04:19,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:04:19,747 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:04:19,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 06:04:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:20,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:04:20,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:04:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 06:04:20,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:04:20,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:04:20,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117450217] [2023-11-29 06:04:20,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:04:20,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624554554] [2023-11-29 06:04:20,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624554554] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:04:20,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:04:20,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 06:04:20,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684818608] [2023-11-29 06:04:20,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:04:20,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:04:20,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:04:20,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:04:20,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:04:20,719 INFO L87 Difference]: Start difference. First operand 27205 states and 45403 transitions. Second operand has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 10 states have internal predecessors, (142), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:04:34,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:04:34,976 INFO L93 Difference]: Finished difference Result 70885 states and 117525 transitions. [2023-11-29 06:04:34,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:04:34,977 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 10 states have internal predecessors, (142), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 624 [2023-11-29 06:04:34,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:04:35,050 INFO L225 Difference]: With dead ends: 70885 [2023-11-29 06:04:35,050 INFO L226 Difference]: Without dead ends: 43778 [2023-11-29 06:04:35,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 614 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:04:35,081 INFO L413 NwaCegarLoop]: 853 mSDtfsCounter, 2532 mSDsluCounter, 5183 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 642 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2532 SdHoareTripleChecker+Valid, 6036 SdHoareTripleChecker+Invalid, 2611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 642 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:04:35,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2532 Valid, 6036 Invalid, 2611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [642 Valid, 1969 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 06:04:35,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43778 states. [2023-11-29 06:04:45,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43778 to 36130. [2023-11-29 06:04:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36130 states, 28858 states have (on average 1.599175272021623) internal successors, (46149), 29010 states have internal predecessors, (46149), 6835 states have call successors, (6835), 436 states have call predecessors, (6835), 436 states have return successors, (6835), 6683 states have call predecessors, (6835), 6835 states have call successors, (6835) [2023-11-29 06:04:45,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36130 states to 36130 states and 59819 transitions. [2023-11-29 06:04:45,768 INFO L78 Accepts]: Start accepts. Automaton has 36130 states and 59819 transitions. Word has length 624 [2023-11-29 06:04:45,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:04:45,768 INFO L495 AbstractCegarLoop]: Abstraction has 36130 states and 59819 transitions. [2023-11-29 06:04:45,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 10 states have internal predecessors, (142), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:04:45,768 INFO L276 IsEmpty]: Start isEmpty. Operand 36130 states and 59819 transitions. [2023-11-29 06:04:45,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2023-11-29 06:04:45,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:04:45,783 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:04:45,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 06:04:45,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:04:45,983 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:04:45,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:04:45,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1781350950, now seen corresponding path program 1 times [2023-11-29 06:04:45,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:04:45,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396773576] [2023-11-29 06:04:45,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:04:45,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:04:46,028 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:04:46,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207585720] [2023-11-29 06:04:46,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:04:46,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:04:46,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:04:46,029 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:04:46,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 06:04:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:46,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 1417 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:04:46,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:04:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 06:04:46,476 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:04:46,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:04:46,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396773576] [2023-11-29 06:04:46,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:04:46,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207585720] [2023-11-29 06:04:46,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207585720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:04:46,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:04:46,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:04:46,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985846828] [2023-11-29 06:04:46,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:04:46,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:04:46,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:04:46,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:04:46,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:04:46,479 INFO L87 Difference]: Start difference. First operand 36130 states and 59819 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:05:04,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:05:04,688 INFO L93 Difference]: Finished difference Result 104446 states and 173612 transitions. [2023-11-29 06:05:04,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:05:04,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 624 [2023-11-29 06:05:04,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:05:04,814 INFO L225 Difference]: With dead ends: 104446 [2023-11-29 06:05:04,814 INFO L226 Difference]: Without dead ends: 68435 [2023-11-29 06:05:04,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 622 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:05:04,858 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 345 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:05:04,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 1222 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:05:04,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68435 states. [2023-11-29 06:05:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68435 to 68408. [2023-11-29 06:05:24,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68408 states, 55414 states have (on average 1.6061284152019346) internal successors, (89002), 55722 states have internal predecessors, (89002), 12304 states have call successors, (12304), 689 states have call predecessors, (12304), 689 states have return successors, (12304), 11996 states have call predecessors, (12304), 12304 states have call successors, (12304) [2023-11-29 06:05:24,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68408 states to 68408 states and 113610 transitions. [2023-11-29 06:05:24,253 INFO L78 Accepts]: Start accepts. Automaton has 68408 states and 113610 transitions. Word has length 624 [2023-11-29 06:05:24,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:05:24,254 INFO L495 AbstractCegarLoop]: Abstraction has 68408 states and 113610 transitions. [2023-11-29 06:05:24,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:05:24,255 INFO L276 IsEmpty]: Start isEmpty. Operand 68408 states and 113610 transitions. [2023-11-29 06:05:24,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2023-11-29 06:05:24,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:05:24,286 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:05:24,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-29 06:05:24,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:05:24,487 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:05:24,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:05:24,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1616223068, now seen corresponding path program 1 times [2023-11-29 06:05:24,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:05:24,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721433538] [2023-11-29 06:05:24,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:05:24,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:05:24,531 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:05:24,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201773929] [2023-11-29 06:05:24,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:05:24,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:05:24,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:05:24,533 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:05:24,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 06:05:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:24,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:05:24,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:05:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-29 06:05:25,552 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:05:25,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:05:25,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721433538] [2023-11-29 06:05:25,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:05:25,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201773929] [2023-11-29 06:05:25,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201773929] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:05:25,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:05:25,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 06:05:25,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145718414] [2023-11-29 06:05:25,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:05:25,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:05:25,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:05:25,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:05:25,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:05:25,555 INFO L87 Difference]: Start difference. First operand 68408 states and 113610 transitions. Second operand has 10 states, 10 states have (on average 14.2) internal successors, (142), 9 states have internal predecessors, (142), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:06:04,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:06:04,199 INFO L93 Difference]: Finished difference Result 190859 states and 314095 transitions. [2023-11-29 06:06:04,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 06:06:04,200 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.2) internal successors, (142), 9 states have internal predecessors, (142), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 624 [2023-11-29 06:06:04,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:06:04,431 INFO L225 Difference]: With dead ends: 190859 [2023-11-29 06:06:04,431 INFO L226 Difference]: Without dead ends: 122570 [2023-11-29 06:06:04,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:06:04,503 INFO L413 NwaCegarLoop]: 1291 mSDtfsCounter, 2541 mSDsluCounter, 6966 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 783 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2541 SdHoareTripleChecker+Valid, 8257 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 783 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:06:04,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2541 Valid, 8257 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [783 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 06:06:04,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122570 states. [2023-11-29 06:06:30,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122570 to 81014. [2023-11-29 06:06:30,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81014 states, 64708 states have (on average 1.589417073623045) internal successors, (102848), 65081 states have internal predecessors, (102848), 15309 states have call successors, (15309), 996 states have call predecessors, (15309), 996 states have return successors, (15309), 14936 states have call predecessors, (15309), 15309 states have call successors, (15309) [2023-11-29 06:06:30,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81014 states to 81014 states and 133466 transitions. [2023-11-29 06:06:30,870 INFO L78 Accepts]: Start accepts. Automaton has 81014 states and 133466 transitions. Word has length 624 [2023-11-29 06:06:30,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:06:30,871 INFO L495 AbstractCegarLoop]: Abstraction has 81014 states and 133466 transitions. [2023-11-29 06:06:30,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.2) internal successors, (142), 9 states have internal predecessors, (142), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-29 06:06:30,871 INFO L276 IsEmpty]: Start isEmpty. Operand 81014 states and 133466 transitions. [2023-11-29 06:06:30,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2023-11-29 06:06:30,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:06:30,899 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:30,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-29 06:06:31,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:31,100 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:06:31,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:31,100 INFO L85 PathProgramCache]: Analyzing trace with hash -433480742, now seen corresponding path program 1 times [2023-11-29 06:06:31,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:31,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828022650] [2023-11-29 06:06:31,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:31,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:31,140 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:06:31,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [955224143] [2023-11-29 06:06:31,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:31,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:31,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:31,142 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:31,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6a7b24-42f4-48d7-b185-00eb56e43109/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 06:06:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:31,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 06:06:31,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 9066 proven. 171 refuted. 0 times theorem prover too weak. 9387 trivial. 0 not checked. [2023-11-29 06:06:32,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:06:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 117 proven. 171 refuted. 0 times theorem prover too weak. 18336 trivial. 0 not checked. [2023-11-29 06:06:33,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:33,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828022650] [2023-11-29 06:06:33,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:06:33,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955224143] [2023-11-29 06:06:33,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955224143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:06:33,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:06:33,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-11-29 06:06:33,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166763184] [2023-11-29 06:06:33,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:06:33,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:06:33,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:33,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:06:33,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:06:33,303 INFO L87 Difference]: Start difference. First operand 81014 states and 133466 transitions. Second operand has 21 states, 21 states have (on average 9.142857142857142) internal successors, (192), 21 states have internal predecessors, (192), 2 states have call successors, (154), 2 states have call predecessors, (154), 4 states have return successors, (155), 2 states have call predecessors, (155), 2 states have call successors, (155)