./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-88.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_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/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_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-88.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/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_49174ef0-e24a-4435-a293-44afbe6c1cd1/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 1648b8247576116efcc38ecc57a34288105aaaa4b64d600c2638d97bcecc6c8c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:19:58,848 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:19:58,930 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:19:58,936 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:19:58,936 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:19:58,957 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:19:58,958 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:19:58,959 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:19:58,959 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:19:58,960 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:19:58,960 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:19:58,961 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:19:58,962 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:19:58,962 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:19:58,963 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:19:58,963 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:19:58,964 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:19:58,964 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:19:58,965 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:19:58,965 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:19:58,965 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:19:58,967 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:19:58,968 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:19:58,968 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:19:58,968 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:19:58,969 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:19:58,969 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:19:58,969 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:19:58,970 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:19:58,970 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:19:58,970 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:19:58,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:19:58,971 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:19:58,971 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:19:58,972 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:19:58,972 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:19:58,972 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:19:58,973 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:19:58,973 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:19:58,973 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:19:58,974 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:19:58,974 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:19:58,975 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_49174ef0-e24a-4435-a293-44afbe6c1cd1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1648b8247576116efcc38ecc57a34288105aaaa4b64d600c2638d97bcecc6c8c [2023-11-29 06:19:59,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:19:59,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:19:59,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:19:59,225 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:19:59,225 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:19:59,226 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-88.i [2023-11-29 06:20:01,961 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:20:02,211 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:20:02,212 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-88.i [2023-11-29 06:20:02,229 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/data/90179b36c/ee7e0d1c98eb4b829d78af729fc1c5ec/FLAG43de8c8f7 [2023-11-29 06:20:02,535 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/data/90179b36c/ee7e0d1c98eb4b829d78af729fc1c5ec [2023-11-29 06:20:02,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:20:02,539 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:20:02,541 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:20:02,541 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:20:02,546 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:20:02,546 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:20:02" (1/1) ... [2023-11-29 06:20:02,547 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7435d2fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:02, skipping insertion in model container [2023-11-29 06:20:02,547 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:20:02" (1/1) ... [2023-11-29 06:20:02,603 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:20:02,721 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_49174ef0-e24a-4435-a293-44afbe6c1cd1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-88.i[916,929] [2023-11-29 06:20:02,892 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:20:02,912 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:20:02,923 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_49174ef0-e24a-4435-a293-44afbe6c1cd1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-88.i[916,929] [2023-11-29 06:20:03,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:20:03,026 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:20:03,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:03 WrapperNode [2023-11-29 06:20:03,027 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:20:03,028 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:20:03,028 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:20:03,028 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:20:03,033 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:03" (1/1) ... [2023-11-29 06:20:03,057 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:03" (1/1) ... [2023-11-29 06:20:03,124 INFO L138 Inliner]: procedures = 26, calls = 128, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 872 [2023-11-29 06:20:03,124 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:20:03,125 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:20:03,125 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:20:03,125 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:20:03,137 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:03" (1/1) ... [2023-11-29 06:20:03,137 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:03" (1/1) ... [2023-11-29 06:20:03,148 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:03" (1/1) ... [2023-11-29 06:20:03,179 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 06:20:03,179 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:03" (1/1) ... [2023-11-29 06:20:03,180 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:03" (1/1) ... [2023-11-29 06:20:03,199 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:03" (1/1) ... [2023-11-29 06:20:03,208 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:03" (1/1) ... [2023-11-29 06:20:03,215 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:03" (1/1) ... [2023-11-29 06:20:03,223 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:03" (1/1) ... [2023-11-29 06:20:03,241 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:20:03,242 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:20:03,242 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:20:03,242 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:20:03,243 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:03" (1/1) ... [2023-11-29 06:20:03,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:20:03,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:03,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:20:03,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:20:03,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:20:03,308 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 06:20:03,308 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 06:20:03,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:20:03,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:20:03,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:20:03,453 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:20:03,454 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:20:04,412 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:20:04,471 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:20:04,471 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 06:20:04,472 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:20:04 BoogieIcfgContainer [2023-11-29 06:20:04,472 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:20:04,503 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:20:04,503 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:20:04,507 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:20:04,507 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:20:02" (1/3) ... [2023-11-29 06:20:04,508 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a5f98b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:20:04, skipping insertion in model container [2023-11-29 06:20:04,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:03" (2/3) ... [2023-11-29 06:20:04,508 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a5f98b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:20:04, skipping insertion in model container [2023-11-29 06:20:04,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:20:04" (3/3) ... [2023-11-29 06:20:04,509 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-88.i [2023-11-29 06:20:04,528 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:20:04,528 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:20:04,586 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:20:04,593 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;@1048ccf8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:20:04,593 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:20:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand has 346 states, 228 states have (on average 1.6271929824561404) internal successors, (371), 229 states have internal predecessors, (371), 115 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2023-11-29 06:20:04,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2023-11-29 06:20:04,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:04,643 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:04,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:04,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:04,650 INFO L85 PathProgramCache]: Analyzing trace with hash 774535474, now seen corresponding path program 1 times [2023-11-29 06:20:04,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:04,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852409532] [2023-11-29 06:20:04,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:04,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:05,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:05,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852409532] [2023-11-29 06:20:05,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 06:20:05,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084451853] [2023-11-29 06:20:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:05,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:05,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:05,028 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:05,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:20:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:05,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 06:20:05,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 25992 trivial. 0 not checked. [2023-11-29 06:20:05,672 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:20:05,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084451853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:20:05,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:20:05,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:20:05,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863403502] [2023-11-29 06:20:05,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:20:05,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 06:20:05,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:05,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 06:20:05,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:20:05,714 INFO L87 Difference]: Start difference. First operand has 346 states, 228 states have (on average 1.6271929824561404) internal successors, (371), 229 states have internal predecessors, (371), 115 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) Second operand has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 2 states have call successors, (115), 2 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-29 06:20:05,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:05,797 INFO L93 Difference]: Finished difference Result 687 states and 1312 transitions. [2023-11-29 06:20:05,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 06:20:05,800 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 2 states have call successors, (115), 2 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 2 states have call successors, (115) Word has length 723 [2023-11-29 06:20:05,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:05,813 INFO L225 Difference]: With dead ends: 687 [2023-11-29 06:20:05,813 INFO L226 Difference]: Without dead ends: 342 [2023-11-29 06:20:05,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 722 GetRequests, 722 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 06:20:05,824 INFO L413 NwaCegarLoop]: 588 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, 588 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 06:20:05,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 588 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:20:05,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-11-29 06:20:05,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2023-11-29 06:20:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 225 states have (on average 1.6044444444444443) internal successors, (361), 225 states have internal predecessors, (361), 115 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2023-11-29 06:20:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 591 transitions. [2023-11-29 06:20:05,925 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 591 transitions. Word has length 723 [2023-11-29 06:20:05,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:05,926 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 591 transitions. [2023-11-29 06:20:05,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 2 states have call successors, (115), 2 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-29 06:20:05,926 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 591 transitions. [2023-11-29 06:20:05,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-11-29 06:20:05,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:05,948 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:05,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:20:06,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 06:20:06,149 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:06,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:06,150 INFO L85 PathProgramCache]: Analyzing trace with hash -394168250, now seen corresponding path program 1 times [2023-11-29 06:20:06,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:06,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340111053] [2023-11-29 06:20:06,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:06,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:06,292 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:20:06,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898630583] [2023-11-29 06:20:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:06,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:06,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:06,294 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:06,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:20:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:06,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:20:06,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26220 trivial. 0 not checked. [2023-11-29 06:20:07,015 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:20:07,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:07,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340111053] [2023-11-29 06:20:07,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:20:07,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898630583] [2023-11-29 06:20:07,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898630583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:20:07,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:20:07,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:20:07,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486464290] [2023-11-29 06:20:07,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:20:07,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:20:07,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:07,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:20:07,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:20:07,022 INFO L87 Difference]: Start difference. First operand 342 states and 591 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-29 06:20:07,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:07,322 INFO L93 Difference]: Finished difference Result 1082 states and 1896 transitions. [2023-11-29 06:20:07,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:20:07,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) Word has length 724 [2023-11-29 06:20:07,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:07,334 INFO L225 Difference]: With dead ends: 1082 [2023-11-29 06:20:07,334 INFO L226 Difference]: Without dead ends: 741 [2023-11-29 06:20:07,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 721 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 06:20:07,338 INFO L413 NwaCegarLoop]: 796 mSDtfsCounter, 667 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:07,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 1951 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:20:07,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2023-11-29 06:20:07,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 735. [2023-11-29 06:20:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 554 states have (on average 1.703971119133574) internal successors, (944), 556 states have internal predecessors, (944), 177 states have call successors, (177), 3 states have call predecessors, (177), 3 states have return successors, (177), 175 states have call predecessors, (177), 177 states have call successors, (177) [2023-11-29 06:20:07,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1298 transitions. [2023-11-29 06:20:07,428 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1298 transitions. Word has length 724 [2023-11-29 06:20:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:07,430 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 1298 transitions. [2023-11-29 06:20:07,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-29 06:20:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1298 transitions. [2023-11-29 06:20:07,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-11-29 06:20:07,440 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:07,441 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:07,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:20:07,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:07,642 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:07,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:07,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1175381054, now seen corresponding path program 1 times [2023-11-29 06:20:07,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:07,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573954338] [2023-11-29 06:20:07,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:07,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:07,747 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:20:07,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497315224] [2023-11-29 06:20:07,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:07,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:07,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:07,755 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:07,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:20:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:08,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:20:08,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26220 trivial. 0 not checked. [2023-11-29 06:20:09,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:20:09,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:09,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573954338] [2023-11-29 06:20:09,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:20:09,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497315224] [2023-11-29 06:20:09,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497315224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:20:09,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:20:09,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:20:09,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33293379] [2023-11-29 06:20:09,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:20:09,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:20:09,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:09,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:20:09,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:20:09,071 INFO L87 Difference]: Start difference. First operand 735 states and 1298 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-29 06:20:09,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:09,186 INFO L93 Difference]: Finished difference Result 2203 states and 3892 transitions. [2023-11-29 06:20:09,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:20:09,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) Word has length 724 [2023-11-29 06:20:09,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:09,203 INFO L225 Difference]: With dead ends: 2203 [2023-11-29 06:20:09,203 INFO L226 Difference]: Without dead ends: 1469 [2023-11-29 06:20:09,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 722 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 06:20:09,207 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 247 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:09,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 1172 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:20:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2023-11-29 06:20:09,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1467. [2023-11-29 06:20:09,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1106 states have (on average 1.7025316455696202) internal successors, (1883), 1110 states have internal predecessors, (1883), 354 states have call successors, (354), 6 states have call predecessors, (354), 6 states have return successors, (354), 350 states have call predecessors, (354), 354 states have call successors, (354) [2023-11-29 06:20:09,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 2591 transitions. [2023-11-29 06:20:09,421 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 2591 transitions. Word has length 724 [2023-11-29 06:20:09,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:09,423 INFO L495 AbstractCegarLoop]: Abstraction has 1467 states and 2591 transitions. [2023-11-29 06:20:09,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-29 06:20:09,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 2591 transitions. [2023-11-29 06:20:09,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-11-29 06:20:09,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:09,433 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:09,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:20:09,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:09,634 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:09,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:09,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1747778944, now seen corresponding path program 1 times [2023-11-29 06:20:09,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:09,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670699489] [2023-11-29 06:20:09,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:09,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:09,705 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:20:09,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369282778] [2023-11-29 06:20:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:09,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:09,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:09,707 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:09,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:20:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:10,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:20:10,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26220 trivial. 0 not checked. [2023-11-29 06:20:10,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:20:10,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:10,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670699489] [2023-11-29 06:20:10,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:20:10,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369282778] [2023-11-29 06:20:10,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369282778] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:20:10,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:20:10,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:20:10,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810320205] [2023-11-29 06:20:10,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:20:10,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:20:10,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:10,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:20:10,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:20:10,228 INFO L87 Difference]: Start difference. First operand 1467 states and 2591 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-29 06:20:10,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:10,312 INFO L93 Difference]: Finished difference Result 3335 states and 5885 transitions. [2023-11-29 06:20:10,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:20:10,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) Word has length 724 [2023-11-29 06:20:10,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:10,325 INFO L225 Difference]: With dead ends: 3335 [2023-11-29 06:20:10,325 INFO L226 Difference]: Without dead ends: 1869 [2023-11-29 06:20:10,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 722 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 06:20:10,330 INFO L413 NwaCegarLoop]: 819 mSDtfsCounter, 349 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:10,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 1388 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:20:10,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2023-11-29 06:20:10,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1697. [2023-11-29 06:20:10,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1334 states have (on average 1.7286356821589206) internal successors, (2306), 1338 states have internal predecessors, (2306), 354 states have call successors, (354), 8 states have call predecessors, (354), 8 states have return successors, (354), 350 states have call predecessors, (354), 354 states have call successors, (354) [2023-11-29 06:20:10,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 3014 transitions. [2023-11-29 06:20:10,434 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 3014 transitions. Word has length 724 [2023-11-29 06:20:10,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:10,435 INFO L495 AbstractCegarLoop]: Abstraction has 1697 states and 3014 transitions. [2023-11-29 06:20:10,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-29 06:20:10,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 3014 transitions. [2023-11-29 06:20:10,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-11-29 06:20:10,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:10,443 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:10,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:20:10,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:10,644 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:10,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:10,645 INFO L85 PathProgramCache]: Analyzing trace with hash -618915650, now seen corresponding path program 1 times [2023-11-29 06:20:10,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:10,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733459784] [2023-11-29 06:20:10,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:10,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:10,732 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:20:10,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1004934125] [2023-11-29 06:20:10,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:10,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:10,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:10,734 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:10,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:20:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:11,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:20:11,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26220 trivial. 0 not checked. [2023-11-29 06:20:11,249 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:20:11,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:11,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733459784] [2023-11-29 06:20:11,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:20:11,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004934125] [2023-11-29 06:20:11,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004934125] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:20:11,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:20:11,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:20:11,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993571192] [2023-11-29 06:20:11,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:20:11,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:20:11,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:11,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:20:11,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:20:11,254 INFO L87 Difference]: Start difference. First operand 1697 states and 3014 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-29 06:20:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:11,397 INFO L93 Difference]: Finished difference Result 4409 states and 7750 transitions. [2023-11-29 06:20:11,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:20:11,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) Word has length 724 [2023-11-29 06:20:11,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:11,418 INFO L225 Difference]: With dead ends: 4409 [2023-11-29 06:20:11,419 INFO L226 Difference]: Without dead ends: 2713 [2023-11-29 06:20:11,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 722 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 06:20:11,425 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 368 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:11,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 1223 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:20:11,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2023-11-29 06:20:11,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2709. [2023-11-29 06:20:11,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2014 states have (on average 1.673286991062562) internal successors, (3370), 2024 states have internal predecessors, (3370), 678 states have call successors, (678), 16 states have call predecessors, (678), 16 states have return successors, (678), 668 states have call predecessors, (678), 678 states have call successors, (678) [2023-11-29 06:20:11,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 4726 transitions. [2023-11-29 06:20:11,702 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 4726 transitions. Word has length 724 [2023-11-29 06:20:11,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:11,703 INFO L495 AbstractCegarLoop]: Abstraction has 2709 states and 4726 transitions. [2023-11-29 06:20:11,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-29 06:20:11,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 4726 transitions. [2023-11-29 06:20:11,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-11-29 06:20:11,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:11,714 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:11,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:20:11,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:11,915 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:11,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:11,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1516308928, now seen corresponding path program 1 times [2023-11-29 06:20:11,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:11,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763821064] [2023-11-29 06:20:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:11,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:11,977 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:20:11,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611149502] [2023-11-29 06:20:11,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:11,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:11,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:11,978 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:11,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:20:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:12,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:20:12,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26220 trivial. 0 not checked. [2023-11-29 06:20:12,507 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:20:12,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:12,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763821064] [2023-11-29 06:20:12,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:20:12,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611149502] [2023-11-29 06:20:12,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611149502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:20:12,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:20:12,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:20:12,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669655681] [2023-11-29 06:20:12,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:20:12,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:20:12,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:12,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:20:12,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:20:12,511 INFO L87 Difference]: Start difference. First operand 2709 states and 4726 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-29 06:20:12,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:12,915 INFO L93 Difference]: Finished difference Result 11761 states and 20266 transitions. [2023-11-29 06:20:12,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:20:12,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) Word has length 724 [2023-11-29 06:20:12,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:12,967 INFO L225 Difference]: With dead ends: 11761 [2023-11-29 06:20:12,967 INFO L226 Difference]: Without dead ends: 9053 [2023-11-29 06:20:12,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 722 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 06:20:12,977 INFO L413 NwaCegarLoop]: 1104 mSDtfsCounter, 1064 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:12,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1064 Valid, 2341 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:20:12,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9053 states. [2023-11-29 06:20:13,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9053 to 4993. [2023-11-29 06:20:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4993 states, 3698 states have (on average 1.6479177934018387) internal successors, (6094), 3720 states have internal predecessors, (6094), 1262 states have call successors, (1262), 32 states have call predecessors, (1262), 32 states have return successors, (1262), 1240 states have call predecessors, (1262), 1262 states have call successors, (1262) [2023-11-29 06:20:13,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4993 states to 4993 states and 8618 transitions. [2023-11-29 06:20:13,506 INFO L78 Accepts]: Start accepts. Automaton has 4993 states and 8618 transitions. Word has length 724 [2023-11-29 06:20:13,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:13,507 INFO L495 AbstractCegarLoop]: Abstraction has 4993 states and 8618 transitions. [2023-11-29 06:20:13,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-29 06:20:13,508 INFO L276 IsEmpty]: Start isEmpty. Operand 4993 states and 8618 transitions. [2023-11-29 06:20:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-11-29 06:20:13,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:13,522 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:13,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 06:20:13,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:13,722 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:13,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:13,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1092662206, now seen corresponding path program 1 times [2023-11-29 06:20:13,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:13,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022905188] [2023-11-29 06:20:13,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:13,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:13,797 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:20:13,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560718683] [2023-11-29 06:20:13,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:13,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:13,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:13,799 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:13,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:20:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:14,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:20:14,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26220 trivial. 0 not checked. [2023-11-29 06:20:14,302 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:20:14,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:14,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022905188] [2023-11-29 06:20:14,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:20:14,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560718683] [2023-11-29 06:20:14,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560718683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:20:14,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:20:14,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:20:14,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305733011] [2023-11-29 06:20:14,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:20:14,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:20:14,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:14,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:20:14,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:20:14,306 INFO L87 Difference]: Start difference. First operand 4993 states and 8618 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-29 06:20:14,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:14,797 INFO L93 Difference]: Finished difference Result 13779 states and 23620 transitions. [2023-11-29 06:20:14,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:20:14,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) Word has length 724 [2023-11-29 06:20:14,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:14,851 INFO L225 Difference]: With dead ends: 13779 [2023-11-29 06:20:14,852 INFO L226 Difference]: Without dead ends: 8787 [2023-11-29 06:20:14,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 722 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 06:20:14,869 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 343 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:14,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 1155 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:20:14,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8787 states. [2023-11-29 06:20:15,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8787 to 8777. [2023-11-29 06:20:15,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8777 states, 6298 states have (on average 1.5912988250238171) internal successors, (10022), 6344 states have internal predecessors, (10022), 2414 states have call successors, (2414), 64 states have call predecessors, (2414), 64 states have return successors, (2414), 2368 states have call predecessors, (2414), 2414 states have call successors, (2414) [2023-11-29 06:20:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8777 states to 8777 states and 14850 transitions. [2023-11-29 06:20:15,515 INFO L78 Accepts]: Start accepts. Automaton has 8777 states and 14850 transitions. Word has length 724 [2023-11-29 06:20:15,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:15,516 INFO L495 AbstractCegarLoop]: Abstraction has 8777 states and 14850 transitions. [2023-11-29 06:20:15,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-29 06:20:15,517 INFO L276 IsEmpty]: Start isEmpty. Operand 8777 states and 14850 transitions. [2023-11-29 06:20:15,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-11-29 06:20:15,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:15,530 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:15,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 06:20:15,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 06:20:15,731 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:15,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:15,731 INFO L85 PathProgramCache]: Analyzing trace with hash 422853118, now seen corresponding path program 1 times [2023-11-29 06:20:15,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:15,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386390923] [2023-11-29 06:20:15,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:15,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:15,806 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:20:15,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974832705] [2023-11-29 06:20:15,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:15,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:15,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:15,808 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:15,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:20:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:16,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:20:16,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26220 trivial. 0 not checked. [2023-11-29 06:20:16,261 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:20:16,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:16,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386390923] [2023-11-29 06:20:16,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:20:16,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974832705] [2023-11-29 06:20:16,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974832705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:20:16,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:20:16,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:20:16,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231134562] [2023-11-29 06:20:16,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:20:16,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:20:16,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:16,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:20:16,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:20:16,264 INFO L87 Difference]: Start difference. First operand 8777 states and 14850 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-29 06:20:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:16,904 INFO L93 Difference]: Finished difference Result 17575 states and 29716 transitions. [2023-11-29 06:20:16,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:20:16,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) Word has length 724 [2023-11-29 06:20:16,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:17,001 INFO L225 Difference]: With dead ends: 17575 [2023-11-29 06:20:17,001 INFO L226 Difference]: Without dead ends: 8799 [2023-11-29 06:20:17,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 722 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 06:20:17,031 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 341 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:17,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 1211 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:20:17,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8799 states. [2023-11-29 06:20:17,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8799 to 6013. [2023-11-29 06:20:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6013 states, 4722 states have (on average 1.6598898771706905) internal successors, (7838), 4744 states have internal predecessors, (7838), 1254 states have call successors, (1254), 36 states have call predecessors, (1254), 36 states have return successors, (1254), 1232 states have call predecessors, (1254), 1254 states have call successors, (1254) [2023-11-29 06:20:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6013 states to 6013 states and 10346 transitions. [2023-11-29 06:20:17,971 INFO L78 Accepts]: Start accepts. Automaton has 6013 states and 10346 transitions. Word has length 724 [2023-11-29 06:20:17,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:17,973 INFO L495 AbstractCegarLoop]: Abstraction has 6013 states and 10346 transitions. [2023-11-29 06:20:17,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-29 06:20:17,973 INFO L276 IsEmpty]: Start isEmpty. Operand 6013 states and 10346 transitions. [2023-11-29 06:20:17,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-11-29 06:20:17,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:17,987 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:17,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:20:18,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 06:20:18,188 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:18,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:18,189 INFO L85 PathProgramCache]: Analyzing trace with hash 350466560, now seen corresponding path program 1 times [2023-11-29 06:20:18,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:18,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156625314] [2023-11-29 06:20:18,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:18,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:18,258 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:20:18,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758687562] [2023-11-29 06:20:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:18,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:18,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:18,260 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:18,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:20:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:18,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:20:18,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 10362 proven. 90 refuted. 0 times theorem prover too weak. 15768 trivial. 0 not checked. [2023-11-29 06:20:18,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 252 proven. 90 refuted. 0 times theorem prover too weak. 25878 trivial. 0 not checked. [2023-11-29 06:20:19,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:19,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156625314] [2023-11-29 06:20:19,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:20:19,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758687562] [2023-11-29 06:20:19,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758687562] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:19,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:20:19,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 06:20:19,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719848484] [2023-11-29 06:20:19,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:19,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:20:19,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:19,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:20:19,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:20:19,420 INFO L87 Difference]: Start difference. First operand 6013 states and 10346 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (145), 2 states have call predecessors, (145), 4 states have return successors, (146), 2 states have call predecessors, (146), 2 states have call successors, (146) [2023-11-29 06:20:20,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:20,944 INFO L93 Difference]: Finished difference Result 11094 states and 18877 transitions. [2023-11-29 06:20:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:20:20,945 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (145), 2 states have call predecessors, (145), 4 states have return successors, (146), 2 states have call predecessors, (146), 2 states have call successors, (146) Word has length 724 [2023-11-29 06:20:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:20,963 INFO L225 Difference]: With dead ends: 11094 [2023-11-29 06:20:20,963 INFO L226 Difference]: Without dead ends: 5082 [2023-11-29 06:20:20,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1450 GetRequests, 1440 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:20:20,979 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 692 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:20,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 1401 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 06:20:20,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5082 states. [2023-11-29 06:20:21,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5082 to 5005. [2023-11-29 06:20:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5005 states, 3623 states have (on average 1.5906707148771737) internal successors, (5763), 3646 states have internal predecessors, (5763), 1338 states have call successors, (1338), 43 states have call predecessors, (1338), 43 states have return successors, (1338), 1315 states have call predecessors, (1338), 1338 states have call successors, (1338) [2023-11-29 06:20:21,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5005 states to 5005 states and 8439 transitions. [2023-11-29 06:20:21,557 INFO L78 Accepts]: Start accepts. Automaton has 5005 states and 8439 transitions. Word has length 724 [2023-11-29 06:20:21,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:21,557 INFO L495 AbstractCegarLoop]: Abstraction has 5005 states and 8439 transitions. [2023-11-29 06:20:21,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (145), 2 states have call predecessors, (145), 4 states have return successors, (146), 2 states have call predecessors, (146), 2 states have call successors, (146) [2023-11-29 06:20:21,558 INFO L276 IsEmpty]: Start isEmpty. Operand 5005 states and 8439 transitions. [2023-11-29 06:20:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-11-29 06:20:21,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:21,566 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:21,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:20:21,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 06:20:21,767 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:21,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:21,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1108180924, now seen corresponding path program 1 times [2023-11-29 06:20:21,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:21,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416260211] [2023-11-29 06:20:21,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:21,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:21,845 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:20:21,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386709169] [2023-11-29 06:20:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:21,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:21,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:21,846 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:21,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:20:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:22,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:20:22,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26220 trivial. 0 not checked. [2023-11-29 06:20:22,385 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:20:22,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:22,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416260211] [2023-11-29 06:20:22,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:20:22,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386709169] [2023-11-29 06:20:22,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386709169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:20:22,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:20:22,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:20:22,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6947862] [2023-11-29 06:20:22,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:20:22,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:20:22,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:22,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:20:22,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:20:22,389 INFO L87 Difference]: Start difference. First operand 5005 states and 8439 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-29 06:20:22,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:22,826 INFO L93 Difference]: Finished difference Result 9743 states and 16421 transitions. [2023-11-29 06:20:22,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:20:22,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) Word has length 724 [2023-11-29 06:20:22,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:22,840 INFO L225 Difference]: With dead ends: 9743 [2023-11-29 06:20:22,840 INFO L226 Difference]: Without dead ends: 4883 [2023-11-29 06:20:22,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 722 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 06:20:22,852 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 335 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:22,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 1408 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:20:22,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4883 states. [2023-11-29 06:20:23,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4883 to 3365. [2023-11-29 06:20:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3365 states, 2658 states have (on average 1.6455981941309255) internal successors, (4374), 2668 states have internal predecessors, (4374), 678 states have call successors, (678), 28 states have call predecessors, (678), 28 states have return successors, (678), 668 states have call predecessors, (678), 678 states have call successors, (678) [2023-11-29 06:20:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 5730 transitions. [2023-11-29 06:20:23,349 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 5730 transitions. Word has length 724 [2023-11-29 06:20:23,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:23,350 INFO L495 AbstractCegarLoop]: Abstraction has 3365 states and 5730 transitions. [2023-11-29 06:20:23,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-29 06:20:23,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 5730 transitions. [2023-11-29 06:20:23,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-11-29 06:20:23,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:23,367 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:23,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:20:23,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:20:23,568 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:23,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:23,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1529484600, now seen corresponding path program 1 times [2023-11-29 06:20:23,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:23,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121714205] [2023-11-29 06:20:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:23,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:23,666 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:20:23,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830608180] [2023-11-29 06:20:23,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:23,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:23,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:23,668 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:23,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:20:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:24,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:20:24,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 10774 proven. 96 refuted. 0 times theorem prover too weak. 15350 trivial. 0 not checked. [2023-11-29 06:20:24,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 246 proven. 96 refuted. 0 times theorem prover too weak. 25878 trivial. 0 not checked. [2023-11-29 06:20:24,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:24,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121714205] [2023-11-29 06:20:24,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:20:24,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830608180] [2023-11-29 06:20:24,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830608180] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:24,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:20:24,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 06:20:24,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515923257] [2023-11-29 06:20:24,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:24,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:20:24,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:24,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:20:24,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:20:24,890 INFO L87 Difference]: Start difference. First operand 3365 states and 5730 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (147), 2 states have call predecessors, (147), 4 states have return successors, (148), 2 states have call predecessors, (148), 2 states have call successors, (148) [2023-11-29 06:20:25,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:25,594 INFO L93 Difference]: Finished difference Result 6177 states and 10431 transitions. [2023-11-29 06:20:25,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:20:25,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (147), 2 states have call predecessors, (147), 4 states have return successors, (148), 2 states have call predecessors, (148), 2 states have call successors, (148) Word has length 724 [2023-11-29 06:20:25,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:25,603 INFO L225 Difference]: With dead ends: 6177 [2023-11-29 06:20:25,603 INFO L226 Difference]: Without dead ends: 2813 [2023-11-29 06:20:25,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1450 GetRequests, 1440 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 06:20:25,608 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 679 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:25,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 1131 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 06:20:25,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2023-11-29 06:20:25,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 2773. [2023-11-29 06:20:25,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2773 states, 2062 states have (on average 1.5994180407371483) internal successors, (3298), 2072 states have internal predecessors, (3298), 678 states have call successors, (678), 32 states have call predecessors, (678), 32 states have return successors, (678), 668 states have call predecessors, (678), 678 states have call successors, (678) [2023-11-29 06:20:25,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 4654 transitions. [2023-11-29 06:20:25,859 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 4654 transitions. Word has length 724 [2023-11-29 06:20:25,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:25,860 INFO L495 AbstractCegarLoop]: Abstraction has 2773 states and 4654 transitions. [2023-11-29 06:20:25,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (147), 2 states have call predecessors, (147), 4 states have return successors, (148), 2 states have call predecessors, (148), 2 states have call successors, (148) [2023-11-29 06:20:25,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 4654 transitions. [2023-11-29 06:20:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2023-11-29 06:20:25,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:25,868 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:25,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:20:26,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 06:20:26,069 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:26,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:26,070 INFO L85 PathProgramCache]: Analyzing trace with hash 632316620, now seen corresponding path program 1 times [2023-11-29 06:20:26,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:26,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6445827] [2023-11-29 06:20:26,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:26,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:26,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:20:26,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781428242] [2023-11-29 06:20:26,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:26,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:26,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:26,152 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:26,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:20:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:26,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:20:26,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 13168 proven. 159 refuted. 0 times theorem prover too weak. 12893 trivial. 0 not checked. [2023-11-29 06:20:27,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 183 proven. 159 refuted. 0 times theorem prover too weak. 25878 trivial. 0 not checked. [2023-11-29 06:20:27,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:27,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6445827] [2023-11-29 06:20:27,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:20:27,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781428242] [2023-11-29 06:20:27,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781428242] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:27,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:20:27,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-29 06:20:27,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705337448] [2023-11-29 06:20:27,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:27,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:20:27,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:27,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:20:27,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:20:27,562 INFO L87 Difference]: Start difference. First operand 2773 states and 4654 transitions. Second operand has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 2 states have call successors, (168), 2 states have call predecessors, (168), 4 states have return successors, (169), 2 states have call predecessors, (169), 2 states have call successors, (169) [2023-11-29 06:20:28,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:28,962 INFO L93 Difference]: Finished difference Result 6325 states and 10640 transitions. [2023-11-29 06:20:28,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:20:28,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 2 states have call successors, (168), 2 states have call predecessors, (168), 4 states have return successors, (169), 2 states have call predecessors, (169), 2 states have call successors, (169) Word has length 725 [2023-11-29 06:20:28,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:28,975 INFO L225 Difference]: With dead ends: 6325 [2023-11-29 06:20:28,975 INFO L226 Difference]: Without dead ends: 3553 [2023-11-29 06:20:28,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1460 GetRequests, 1441 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:20:28,981 INFO L413 NwaCegarLoop]: 787 mSDtfsCounter, 685 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 2222 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:28,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 2222 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 06:20:28,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2023-11-29 06:20:29,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 3004. [2023-11-29 06:20:29,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 2166 states have (on average 1.5632502308402585) internal successors, (3386), 2177 states have internal predecessors, (3386), 793 states have call successors, (793), 44 states have call predecessors, (793), 44 states have return successors, (793), 782 states have call predecessors, (793), 793 states have call successors, (793) [2023-11-29 06:20:29,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 4972 transitions. [2023-11-29 06:20:29,392 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 4972 transitions. Word has length 725 [2023-11-29 06:20:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:29,393 INFO L495 AbstractCegarLoop]: Abstraction has 3004 states and 4972 transitions. [2023-11-29 06:20:29,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 2 states have call successors, (168), 2 states have call predecessors, (168), 4 states have return successors, (169), 2 states have call predecessors, (169), 2 states have call successors, (169) [2023-11-29 06:20:29,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 4972 transitions. [2023-11-29 06:20:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2023-11-29 06:20:29,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:29,400 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:29,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:20:29,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:29,601 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:29,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:29,601 INFO L85 PathProgramCache]: Analyzing trace with hash 2018520014, now seen corresponding path program 1 times [2023-11-29 06:20:29,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:29,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207288550] [2023-11-29 06:20:29,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:29,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:29,668 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:20:29,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520275979] [2023-11-29 06:20:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:29,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:29,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:29,670 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:29,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:20:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:30,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:20:30,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 3522 proven. 318 refuted. 0 times theorem prover too weak. 22380 trivial. 0 not checked. [2023-11-29 06:20:31,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 24 proven. 318 refuted. 0 times theorem prover too weak. 25878 trivial. 0 not checked. [2023-11-29 06:20:31,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:31,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207288550] [2023-11-29 06:20:31,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:20:31,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520275979] [2023-11-29 06:20:31,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520275979] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:31,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:20:31,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-29 06:20:31,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881395784] [2023-11-29 06:20:31,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:31,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:20:31,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:31,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:20:31,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:20:31,645 INFO L87 Difference]: Start difference. First operand 3004 states and 4972 transitions. Second operand has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 2 states have call successors, (221), 2 states have call predecessors, (221), 4 states have return successors, (222), 2 states have call predecessors, (222), 2 states have call successors, (222) [2023-11-29 06:20:32,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:32,491 INFO L93 Difference]: Finished difference Result 5928 states and 9744 transitions. [2023-11-29 06:20:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:20:32,492 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 2 states have call successors, (221), 2 states have call predecessors, (221), 4 states have return successors, (222), 2 states have call predecessors, (222), 2 states have call successors, (222) Word has length 725 [2023-11-29 06:20:32,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:32,504 INFO L225 Difference]: With dead ends: 5928 [2023-11-29 06:20:32,504 INFO L226 Difference]: Without dead ends: 3140 [2023-11-29 06:20:32,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1453 GetRequests, 1440 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:20:32,509 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 435 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:32,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 1594 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 06:20:32,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2023-11-29 06:20:32,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 3056. [2023-11-29 06:20:32,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 2205 states have (on average 1.547845804988662) internal successors, (3413), 2216 states have internal predecessors, (3413), 793 states have call successors, (793), 57 states have call predecessors, (793), 57 states have return successors, (793), 782 states have call predecessors, (793), 793 states have call successors, (793) [2023-11-29 06:20:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 4999 transitions. [2023-11-29 06:20:33,009 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 4999 transitions. Word has length 725 [2023-11-29 06:20:33,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:33,011 INFO L495 AbstractCegarLoop]: Abstraction has 3056 states and 4999 transitions. [2023-11-29 06:20:33,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 2 states have call successors, (221), 2 states have call predecessors, (221), 4 states have return successors, (222), 2 states have call predecessors, (222), 2 states have call successors, (222) [2023-11-29 06:20:33,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 4999 transitions. [2023-11-29 06:20:33,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2023-11-29 06:20:33,020 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:33,020 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:33,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:20:33,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:33,221 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:33,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:33,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2075778316, now seen corresponding path program 1 times [2023-11-29 06:20:33,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:33,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050227167] [2023-11-29 06:20:33,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:33,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:33,295 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:20:33,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554614225] [2023-11-29 06:20:33,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:33,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:33,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:33,298 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:33,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:20:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:33,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:20:33,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 11154 proven. 102 refuted. 0 times theorem prover too weak. 14964 trivial. 0 not checked. [2023-11-29 06:20:34,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 240 proven. 102 refuted. 0 times theorem prover too weak. 25878 trivial. 0 not checked. [2023-11-29 06:20:35,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:35,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050227167] [2023-11-29 06:20:35,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:20:35,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554614225] [2023-11-29 06:20:35,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554614225] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:35,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:20:35,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2023-11-29 06:20:35,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028022685] [2023-11-29 06:20:35,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:35,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:20:35,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:35,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:20:35,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:20:35,009 INFO L87 Difference]: Start difference. First operand 3056 states and 4999 transitions. Second operand has 18 states, 18 states have (on average 10.833333333333334) internal successors, (195), 18 states have internal predecessors, (195), 2 states have call successors, (149), 2 states have call predecessors, (149), 4 states have return successors, (150), 2 states have call predecessors, (150), 2 states have call successors, (150) [2023-11-29 06:20:43,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:43,584 INFO L93 Difference]: Finished difference Result 22859 states and 38110 transitions. [2023-11-29 06:20:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-11-29 06:20:43,584 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.833333333333334) internal successors, (195), 18 states have internal predecessors, (195), 2 states have call successors, (149), 2 states have call predecessors, (149), 4 states have return successors, (150), 2 states have call predecessors, (150), 2 states have call successors, (150) Word has length 725 [2023-11-29 06:20:43,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:43,639 INFO L225 Difference]: With dead ends: 22859 [2023-11-29 06:20:43,639 INFO L226 Difference]: Without dead ends: 20023 [2023-11-29 06:20:43,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1555 GetRequests, 1445 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4506 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2191, Invalid=10019, Unknown=0, NotChecked=0, Total=12210 [2023-11-29 06:20:43,654 INFO L413 NwaCegarLoop]: 1132 mSDtfsCounter, 16581 mSDsluCounter, 5962 mSDsCounter, 0 mSdLazyCounter, 3247 mSolverCounterSat, 4472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16691 SdHoareTripleChecker+Valid, 7094 SdHoareTripleChecker+Invalid, 7719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4472 IncrementalHoareTripleChecker+Valid, 3247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:43,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16691 Valid, 7094 Invalid, 7719 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4472 Valid, 3247 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-29 06:20:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20023 states. [2023-11-29 06:20:44,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20023 to 3808. [2023-11-29 06:20:44,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 2952 states have (on average 1.6077235772357723) internal successors, (4746), 2963 states have internal predecessors, (4746), 793 states have call successors, (793), 62 states have call predecessors, (793), 62 states have return successors, (793), 782 states have call predecessors, (793), 793 states have call successors, (793) [2023-11-29 06:20:44,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 6332 transitions. [2023-11-29 06:20:44,390 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 6332 transitions. Word has length 725 [2023-11-29 06:20:44,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:44,392 INFO L495 AbstractCegarLoop]: Abstraction has 3808 states and 6332 transitions. [2023-11-29 06:20:44,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.833333333333334) internal successors, (195), 18 states have internal predecessors, (195), 2 states have call successors, (149), 2 states have call predecessors, (149), 4 states have return successors, (150), 2 states have call predecessors, (150), 2 states have call successors, (150) [2023-11-29 06:20:44,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 6332 transitions. [2023-11-29 06:20:44,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2023-11-29 06:20:44,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:44,402 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:44,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:20:44,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:20:44,603 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:44,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:44,603 INFO L85 PathProgramCache]: Analyzing trace with hash -280026934, now seen corresponding path program 1 times [2023-11-29 06:20:44,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:44,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495096143] [2023-11-29 06:20:44,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:44,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:44,671 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:20:44,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333108560] [2023-11-29 06:20:44,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:44,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:44,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:44,673 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:44,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:20:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:45,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:20:45,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 13204 proven. 177 refuted. 0 times theorem prover too weak. 12839 trivial. 0 not checked. [2023-11-29 06:20:45,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 165 proven. 177 refuted. 0 times theorem prover too weak. 25878 trivial. 0 not checked. [2023-11-29 06:20:46,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:46,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495096143] [2023-11-29 06:20:46,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:20:46,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333108560] [2023-11-29 06:20:46,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333108560] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:46,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:20:46,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 06:20:46,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529933695] [2023-11-29 06:20:46,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:46,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:20:46,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:46,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:20:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:20:46,209 INFO L87 Difference]: Start difference. First operand 3808 states and 6332 transitions. Second operand has 12 states, 12 states have (on average 20.333333333333332) internal successors, (244), 12 states have internal predecessors, (244), 3 states have call successors, (174), 2 states have call predecessors, (174), 4 states have return successors, (175), 3 states have call predecessors, (175), 3 states have call successors, (175) [2023-11-29 06:20:51,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 06:20:55,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 06:20:57,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:57,245 INFO L93 Difference]: Finished difference Result 14158 states and 23243 transitions. [2023-11-29 06:20:57,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 06:20:57,246 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.333333333333332) internal successors, (244), 12 states have internal predecessors, (244), 3 states have call successors, (174), 2 states have call predecessors, (174), 4 states have return successors, (175), 3 states have call predecessors, (175), 3 states have call successors, (175) Word has length 725 [2023-11-29 06:20:57,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:57,264 INFO L225 Difference]: With dead ends: 14158 [2023-11-29 06:20:57,264 INFO L226 Difference]: Without dead ends: 10574 [2023-11-29 06:20:57,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1465 GetRequests, 1440 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2023-11-29 06:20:57,270 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 1411 mSDsluCounter, 2299 mSDsCounter, 0 mSdLazyCounter, 1836 mSolverCounterSat, 556 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 2850 SdHoareTripleChecker+Invalid, 2394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 556 IncrementalHoareTripleChecker+Valid, 1836 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:57,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1515 Valid, 2850 Invalid, 2394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [556 Valid, 1836 Invalid, 2 Unknown, 0 Unchecked, 9.6s Time] [2023-11-29 06:20:57,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10574 states. [2023-11-29 06:20:58,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10574 to 8612. [2023-11-29 06:20:58,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8612 states, 6805 states have (on average 1.59808963997061) internal successors, (10875), 6840 states have internal predecessors, (10875), 1681 states have call successors, (1681), 125 states have call predecessors, (1681), 125 states have return successors, (1681), 1646 states have call predecessors, (1681), 1681 states have call successors, (1681) [2023-11-29 06:20:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8612 states to 8612 states and 14237 transitions. [2023-11-29 06:20:58,312 INFO L78 Accepts]: Start accepts. Automaton has 8612 states and 14237 transitions. Word has length 725 [2023-11-29 06:20:58,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:58,312 INFO L495 AbstractCegarLoop]: Abstraction has 8612 states and 14237 transitions. [2023-11-29 06:20:58,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.333333333333332) internal successors, (244), 12 states have internal predecessors, (244), 3 states have call successors, (174), 2 states have call predecessors, (174), 4 states have return successors, (175), 3 states have call predecessors, (175), 3 states have call successors, (175) [2023-11-29 06:20:58,313 INFO L276 IsEmpty]: Start isEmpty. Operand 8612 states and 14237 transitions. [2023-11-29 06:20:58,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2023-11-29 06:20:58,322 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:58,323 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:58,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:20:58,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:20:58,523 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:58,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:58,524 INFO L85 PathProgramCache]: Analyzing trace with hash 559476906, now seen corresponding path program 1 times [2023-11-29 06:20:58,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:58,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300119075] [2023-11-29 06:20:58,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:58,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:58,579 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:20:58,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989361855] [2023-11-29 06:20:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:58,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:58,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:58,581 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:58,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:20:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:59,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:20:59,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 13068 proven. 189 refuted. 0 times theorem prover too weak. 12963 trivial. 0 not checked. [2023-11-29 06:20:59,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 153 proven. 189 refuted. 0 times theorem prover too weak. 25878 trivial. 0 not checked. [2023-11-29 06:21:00,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:00,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300119075] [2023-11-29 06:21:00,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:21:00,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989361855] [2023-11-29 06:21:00,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989361855] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:21:00,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:21:00,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 06:21:00,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930233274] [2023-11-29 06:21:00,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:00,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:21:00,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:00,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:21:00,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:21:00,098 INFO L87 Difference]: Start difference. First operand 8612 states and 14237 transitions. Second operand has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 3 states have call successors, (178), 2 states have call predecessors, (178), 4 states have return successors, (179), 3 states have call predecessors, (179), 3 states have call successors, (179) [2023-11-29 06:21:05,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:05,909 INFO L93 Difference]: Finished difference Result 34438 states and 56471 transitions. [2023-11-29 06:21:05,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 06:21:05,910 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 3 states have call successors, (178), 2 states have call predecessors, (178), 4 states have return successors, (179), 3 states have call predecessors, (179), 3 states have call successors, (179) Word has length 726 [2023-11-29 06:21:05,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:05,960 INFO L225 Difference]: With dead ends: 34438 [2023-11-29 06:21:05,961 INFO L226 Difference]: Without dead ends: 26062 [2023-11-29 06:21:05,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1479 GetRequests, 1444 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=404, Invalid=928, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 06:21:05,975 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 3345 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 1055 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3348 SdHoareTripleChecker+Valid, 1999 SdHoareTripleChecker+Invalid, 2758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1055 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:05,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3348 Valid, 1999 Invalid, 2758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1055 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 06:21:05,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26062 states. [2023-11-29 06:21:07,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26062 to 12476. [2023-11-29 06:21:07,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12476 states, 10171 states have (on average 1.6137056336643398) internal successors, (16413), 10218 states have internal predecessors, (16413), 2133 states have call successors, (2133), 171 states have call predecessors, (2133), 171 states have return successors, (2133), 2086 states have call predecessors, (2133), 2133 states have call successors, (2133) [2023-11-29 06:21:07,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12476 states to 12476 states and 20679 transitions. [2023-11-29 06:21:07,605 INFO L78 Accepts]: Start accepts. Automaton has 12476 states and 20679 transitions. Word has length 726 [2023-11-29 06:21:07,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:07,605 INFO L495 AbstractCegarLoop]: Abstraction has 12476 states and 20679 transitions. [2023-11-29 06:21:07,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 3 states have call successors, (178), 2 states have call predecessors, (178), 4 states have return successors, (179), 3 states have call predecessors, (179), 3 states have call successors, (179) [2023-11-29 06:21:07,605 INFO L276 IsEmpty]: Start isEmpty. Operand 12476 states and 20679 transitions. [2023-11-29 06:21:07,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2023-11-29 06:21:07,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:07,619 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:21:07,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 06:21:07,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:21:07,819 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:21:07,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:07,820 INFO L85 PathProgramCache]: Analyzing trace with hash -469882392, now seen corresponding path program 1 times [2023-11-29 06:21:07,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:07,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399825007] [2023-11-29 06:21:07,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:07,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:07,882 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:21:07,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051207608] [2023-11-29 06:21:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:07,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:07,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:07,884 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:07,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:21:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:08,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:21:08,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 13204 proven. 177 refuted. 0 times theorem prover too weak. 12839 trivial. 0 not checked. [2023-11-29 06:21:09,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 165 proven. 177 refuted. 0 times theorem prover too weak. 25878 trivial. 0 not checked. [2023-11-29 06:21:10,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:10,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399825007] [2023-11-29 06:21:10,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:21:10,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051207608] [2023-11-29 06:21:10,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051207608] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:21:10,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:21:10,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-29 06:21:10,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382453303] [2023-11-29 06:21:10,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:10,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:21:10,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:10,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:21:10,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:21:10,482 INFO L87 Difference]: Start difference. First operand 12476 states and 20679 transitions. Second operand has 10 states, 10 states have (on average 26.1) internal successors, (261), 10 states have internal predecessors, (261), 4 states have call successors, (230), 3 states have call predecessors, (230), 5 states have return successors, (230), 4 states have call predecessors, (230), 4 states have call successors, (230) [2023-11-29 06:21:17,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:17,963 INFO L93 Difference]: Finished difference Result 57164 states and 94615 transitions. [2023-11-29 06:21:17,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:21:17,965 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.1) internal successors, (261), 10 states have internal predecessors, (261), 4 states have call successors, (230), 3 states have call predecessors, (230), 5 states have return successors, (230), 4 states have call predecessors, (230), 4 states have call successors, (230) Word has length 726 [2023-11-29 06:21:17,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:18,031 INFO L225 Difference]: With dead ends: 57164 [2023-11-29 06:21:18,031 INFO L226 Difference]: Without dead ends: 44932 [2023-11-29 06:21:18,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1454 GetRequests, 1442 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:21:18,048 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 1771 mSDsluCounter, 2310 mSDsCounter, 0 mSdLazyCounter, 1970 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1940 SdHoareTripleChecker+Valid, 2742 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 1970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:18,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1940 Valid, 2742 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 1970 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 06:21:18,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44932 states. [2023-11-29 06:21:21,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44932 to 24706. [2023-11-29 06:21:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24706 states, 20227 states have (on average 1.612250951698225) internal successors, (32611), 20320 states have internal predecessors, (32611), 4151 states have call successors, (4151), 327 states have call predecessors, (4151), 327 states have return successors, (4151), 4058 states have call predecessors, (4151), 4151 states have call successors, (4151) [2023-11-29 06:21:21,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24706 states to 24706 states and 40913 transitions. [2023-11-29 06:21:21,744 INFO L78 Accepts]: Start accepts. Automaton has 24706 states and 40913 transitions. Word has length 726 [2023-11-29 06:21:21,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:21,745 INFO L495 AbstractCegarLoop]: Abstraction has 24706 states and 40913 transitions. [2023-11-29 06:21:21,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.1) internal successors, (261), 10 states have internal predecessors, (261), 4 states have call successors, (230), 3 states have call predecessors, (230), 5 states have return successors, (230), 4 states have call predecessors, (230), 4 states have call successors, (230) [2023-11-29 06:21:21,745 INFO L276 IsEmpty]: Start isEmpty. Operand 24706 states and 40913 transitions. [2023-11-29 06:21:21,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2023-11-29 06:21:21,766 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:21,766 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:21:21,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:21:21,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:21:21,967 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:21:21,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:21,967 INFO L85 PathProgramCache]: Analyzing trace with hash 791034858, now seen corresponding path program 1 times [2023-11-29 06:21:21,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:21,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070646457] [2023-11-29 06:21:21,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:21,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:22,027 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:21:22,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328710478] [2023-11-29 06:21:22,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:22,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:22,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:22,029 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:22,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:21:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:22,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:21:22,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 11858 proven. 222 refuted. 0 times theorem prover too weak. 14140 trivial. 0 not checked. [2023-11-29 06:21:23,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 456 proven. 225 refuted. 0 times theorem prover too weak. 25539 trivial. 0 not checked. [2023-11-29 06:21:24,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:24,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070646457] [2023-11-29 06:21:24,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:21:24,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328710478] [2023-11-29 06:21:24,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328710478] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:21:24,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:21:24,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2023-11-29 06:21:24,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129165558] [2023-11-29 06:21:24,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:24,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 06:21:24,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:24,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 06:21:24,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:21:24,900 INFO L87 Difference]: Start difference. First operand 24706 states and 40913 transitions. Second operand has 17 states, 16 states have (on average 16.5625) internal successors, (265), 15 states have internal predecessors, (265), 6 states have call successors, (230), 4 states have call predecessors, (230), 7 states have return successors, (230), 6 states have call predecessors, (230), 6 states have call successors, (230) [2023-11-29 06:21:52,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:52,909 INFO L93 Difference]: Finished difference Result 155790 states and 255781 transitions. [2023-11-29 06:21:52,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 06:21:52,909 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 16.5625) internal successors, (265), 15 states have internal predecessors, (265), 6 states have call successors, (230), 4 states have call predecessors, (230), 7 states have return successors, (230), 6 states have call predecessors, (230), 6 states have call successors, (230) Word has length 726 [2023-11-29 06:21:52,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:53,162 INFO L225 Difference]: With dead ends: 155790 [2023-11-29 06:21:53,162 INFO L226 Difference]: Without dead ends: 130104 [2023-11-29 06:21:53,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1482 GetRequests, 1440 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=570, Invalid=1236, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 06:21:53,208 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 3796 mSDsluCounter, 5887 mSDsCounter, 0 mSdLazyCounter, 4217 mSolverCounterSat, 1393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4026 SdHoareTripleChecker+Valid, 6450 SdHoareTripleChecker+Invalid, 5610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1393 IncrementalHoareTripleChecker+Valid, 4217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:53,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4026 Valid, 6450 Invalid, 5610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1393 Valid, 4217 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-11-29 06:21:53,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130104 states. [2023-11-29 06:22:08,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130104 to 84326. [2023-11-29 06:22:08,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84326 states, 66441 states have (on average 1.5624238045784982) internal successors, (103809), 66834 states have internal predecessors, (103809), 16531 states have call successors, (16531), 1353 states have call predecessors, (16531), 1353 states have return successors, (16531), 16138 states have call predecessors, (16531), 16531 states have call successors, (16531) [2023-11-29 06:22:08,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84326 states to 84326 states and 136871 transitions. [2023-11-29 06:22:08,741 INFO L78 Accepts]: Start accepts. Automaton has 84326 states and 136871 transitions. Word has length 726 [2023-11-29 06:22:08,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:08,742 INFO L495 AbstractCegarLoop]: Abstraction has 84326 states and 136871 transitions. [2023-11-29 06:22:08,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 16.5625) internal successors, (265), 15 states have internal predecessors, (265), 6 states have call successors, (230), 4 states have call predecessors, (230), 7 states have return successors, (230), 6 states have call predecessors, (230), 6 states have call successors, (230) [2023-11-29 06:22:08,743 INFO L276 IsEmpty]: Start isEmpty. Operand 84326 states and 136871 transitions. [2023-11-29 06:22:08,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2023-11-29 06:22:08,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:08,785 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:22:08,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 06:22:08,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:22:08,985 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:22:08,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:08,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1351734636, now seen corresponding path program 1 times [2023-11-29 06:22:08,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:08,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106424948] [2023-11-29 06:22:08,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:08,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:09,051 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:22:09,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390136058] [2023-11-29 06:22:09,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:09,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:09,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:09,052 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:09,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 06:22:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:09,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 06:22:09,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 7238 proven. 102 refuted. 0 times theorem prover too weak. 18880 trivial. 0 not checked. [2023-11-29 06:22:10,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 576 proven. 105 refuted. 0 times theorem prover too weak. 25539 trivial. 0 not checked. [2023-11-29 06:22:11,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:11,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106424948] [2023-11-29 06:22:11,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:22:11,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390136058] [2023-11-29 06:22:11,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390136058] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:11,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:22:11,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 06:22:11,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006144213] [2023-11-29 06:22:11,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:11,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:22:11,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:11,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:22:11,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:22:11,818 INFO L87 Difference]: Start difference. First operand 84326 states and 136871 transitions. Second operand has 18 states, 17 states have (on average 17.470588235294116) internal successors, (297), 16 states have internal predecessors, (297), 6 states have call successors, (230), 4 states have call predecessors, (230), 7 states have return successors, (230), 6 states have call predecessors, (230), 6 states have call successors, (230) [2023-11-29 06:24:12,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:24:12,704 INFO L93 Difference]: Finished difference Result 574847 states and 931278 transitions. [2023-11-29 06:24:12,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 06:24:12,705 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 17.470588235294116) internal successors, (297), 16 states have internal predecessors, (297), 6 states have call successors, (230), 4 states have call predecessors, (230), 7 states have return successors, (230), 6 states have call predecessors, (230), 6 states have call successors, (230) Word has length 726 [2023-11-29 06:24:12,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:24:14,378 INFO L225 Difference]: With dead ends: 574847 [2023-11-29 06:24:14,378 INFO L226 Difference]: Without dead ends: 490773 [2023-11-29 06:24:14,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1491 GetRequests, 1442 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=859, Invalid=1691, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 06:24:14,579 INFO L413 NwaCegarLoop]: 832 mSDtfsCounter, 6977 mSDsluCounter, 4539 mSDsCounter, 0 mSdLazyCounter, 4074 mSolverCounterSat, 3527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7269 SdHoareTripleChecker+Valid, 5371 SdHoareTripleChecker+Invalid, 7601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3527 IncrementalHoareTripleChecker+Valid, 4074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:24:14,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7269 Valid, 5371 Invalid, 7601 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3527 Valid, 4074 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-11-29 06:24:14,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490773 states. [2023-11-29 06:25:22,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490773 to 298078. [2023-11-29 06:25:23,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298078 states, 230443 states have (on average 1.5377121457366898) internal successors, (354355), 231860 states have internal predecessors, (354355), 62283 states have call successors, (62283), 5351 states have call predecessors, (62283), 5351 states have return successors, (62283), 60866 states have call predecessors, (62283), 62283 states have call successors, (62283) [2023-11-29 06:25:24,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298078 states to 298078 states and 478921 transitions. [2023-11-29 06:25:24,606 INFO L78 Accepts]: Start accepts. Automaton has 298078 states and 478921 transitions. Word has length 726 [2023-11-29 06:25:24,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:25:24,607 INFO L495 AbstractCegarLoop]: Abstraction has 298078 states and 478921 transitions. [2023-11-29 06:25:24,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 17.470588235294116) internal successors, (297), 16 states have internal predecessors, (297), 6 states have call successors, (230), 4 states have call predecessors, (230), 7 states have return successors, (230), 6 states have call predecessors, (230), 6 states have call successors, (230) [2023-11-29 06:25:24,607 INFO L276 IsEmpty]: Start isEmpty. Operand 298078 states and 478921 transitions. [2023-11-29 06:25:24,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2023-11-29 06:25:24,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:25:24,868 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:25:24,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-29 06:25:25,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:25:25,068 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:25:25,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:25:25,069 INFO L85 PathProgramCache]: Analyzing trace with hash 831050862, now seen corresponding path program 1 times [2023-11-29 06:25:25,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:25:25,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82545691] [2023-11-29 06:25:25,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:25:25,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:25:25,129 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:25:25,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529701940] [2023-11-29 06:25:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:25:25,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:25:25,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:25:25,130 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:25:25,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 06:25:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:25:25,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:25:25,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:25:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26220 trivial. 0 not checked. [2023-11-29 06:25:25,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:25:25,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:25:25,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82545691] [2023-11-29 06:25:25,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:25:25,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529701940] [2023-11-29 06:25:25,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529701940] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:25:25,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:25:25,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:25:25,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630981494] [2023-11-29 06:25:25,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:25:25,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:25:25,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:25:25,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:25:25,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:25:25,658 INFO L87 Difference]: Start difference. First operand 298078 states and 478921 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-29 06:26:28,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:28,871 INFO L93 Difference]: Finished difference Result 625686 states and 1009174 transitions. [2023-11-29 06:26:28,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:26:28,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) Word has length 726 [2023-11-29 06:26:28,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:29,799 INFO L225 Difference]: With dead ends: 625686 [2023-11-29 06:26:29,799 INFO L226 Difference]: Without dead ends: 317740 [2023-11-29 06:26:30,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 724 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 06:26:30,157 INFO L413 NwaCegarLoop]: 746 mSDtfsCounter, 324 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:30,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1295 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:26:30,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317740 states. [2023-11-29 06:27:33,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317740 to 279194. [2023-11-29 06:27:33,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279194 states, 213510 states have (on average 1.5176150999953164) internal successors, (324026), 214863 states have internal predecessors, (324026), 60235 states have call successors, (60235), 5448 states have call predecessors, (60235), 5448 states have return successors, (60235), 58882 states have call predecessors, (60235), 60235 states have call successors, (60235) [2023-11-29 06:27:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279194 states to 279194 states and 444496 transitions. [2023-11-29 06:27:35,311 INFO L78 Accepts]: Start accepts. Automaton has 279194 states and 444496 transitions. Word has length 726 [2023-11-29 06:27:35,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:27:35,311 INFO L495 AbstractCegarLoop]: Abstraction has 279194 states and 444496 transitions. [2023-11-29 06:27:35,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-29 06:27:35,312 INFO L276 IsEmpty]: Start isEmpty. Operand 279194 states and 444496 transitions. [2023-11-29 06:27:35,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2023-11-29 06:27:35,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:27:35,377 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:27:35,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-29 06:27:35,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:27:35,578 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:27:35,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:27:35,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1648699312, now seen corresponding path program 1 times [2023-11-29 06:27:35,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:27:35,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341769468] [2023-11-29 06:27:35,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:27:35,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:27:35,641 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:27:35,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7561452] [2023-11-29 06:27:35,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:27:35,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:27:35,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:27:35,642 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:27:35,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49174ef0-e24a-4435-a293-44afbe6c1cd1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 06:27:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:27:36,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:27:36,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:27:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26220 trivial. 0 not checked. [2023-11-29 06:27:57,350 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:27:57,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:27:57,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341769468] [2023-11-29 06:27:57,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:27:57,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7561452] [2023-11-29 06:27:57,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7561452] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:27:57,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:27:57,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:27:57,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587892017] [2023-11-29 06:27:57,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:27:57,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:27:57,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:27:57,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:27:57,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:27:57,353 INFO L87 Difference]: Start difference. First operand 279194 states and 444496 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-29 06:28:02,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:30:58,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0]