./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-57.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/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_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-57.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/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_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/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 85317af79e2001c8e1b318bf68e7fdcd0f9e26e9789b5022a63d412f2c352aaf --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:09:45,189 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:09:45,251 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:09:45,256 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:09:45,256 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:09:45,278 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:09:45,278 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:09:45,279 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:09:45,280 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:09:45,280 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:09:45,281 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:09:45,281 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:09:45,282 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:09:45,283 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:09:45,283 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:09:45,284 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:09:45,284 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:09:45,285 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:09:45,285 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:09:45,286 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:09:45,286 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:09:45,287 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:09:45,288 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:09:45,288 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:09:45,288 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:09:45,289 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:09:45,289 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:09:45,289 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:09:45,290 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:09:45,290 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:09:45,291 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:09:45,291 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:09:45,291 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:09:45,292 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:09:45,292 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:09:45,292 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:09:45,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:09:45,293 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:09:45,293 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:09:45,293 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:09:45,293 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:09:45,294 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:09:45,294 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_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85317af79e2001c8e1b318bf68e7fdcd0f9e26e9789b5022a63d412f2c352aaf [2023-11-29 02:09:45,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:09:45,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:09:45,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:09:45,551 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:09:45,551 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:09:45,553 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-57.i [2023-11-29 02:09:48,347 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:09:48,589 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:09:48,590 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-57.i [2023-11-29 02:09:48,606 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/data/46f794624/9fe2854d98c549ae90c78d0b72ce13a0/FLAGeb0c76500 [2023-11-29 02:09:48,620 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/data/46f794624/9fe2854d98c549ae90c78d0b72ce13a0 [2023-11-29 02:09:48,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:09:48,624 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:09:48,626 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:09:48,626 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:09:48,632 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:09:48,633 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:09:48" (1/1) ... [2023-11-29 02:09:48,634 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b9da6c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:09:48, skipping insertion in model container [2023-11-29 02:09:48,634 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:09:48" (1/1) ... [2023-11-29 02:09:48,686 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:09:48,831 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_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-57.i[916,929] [2023-11-29 02:09:48,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:09:49,014 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:09:49,025 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_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-57.i[916,929] [2023-11-29 02:09:49,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:09:49,138 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:09:49,139 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:09:49 WrapperNode [2023-11-29 02:09:49,139 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:09:49,140 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:09:49,140 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:09:49,140 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:09:49,146 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:09:49" (1/1) ... [2023-11-29 02:09:49,171 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:09:49" (1/1) ... [2023-11-29 02:09:49,254 INFO L138 Inliner]: procedures = 26, calls = 126, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 921 [2023-11-29 02:09:49,254 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:09:49,255 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:09:49,255 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:09:49,255 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:09:49,264 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:09:49" (1/1) ... [2023-11-29 02:09:49,265 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:09:49" (1/1) ... [2023-11-29 02:09:49,277 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:09:49" (1/1) ... [2023-11-29 02:09:49,369 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 02:09:49,369 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:09:49" (1/1) ... [2023-11-29 02:09:49,369 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:09:49" (1/1) ... [2023-11-29 02:09:49,390 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:09:49" (1/1) ... [2023-11-29 02:09:49,398 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:09:49" (1/1) ... [2023-11-29 02:09:49,406 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:09:49" (1/1) ... [2023-11-29 02:09:49,415 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:09:49" (1/1) ... [2023-11-29 02:09:49,433 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:09:49,434 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:09:49,434 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:09:49,434 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:09:49,435 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:09:49" (1/1) ... [2023-11-29 02:09:49,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:09:49,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:49,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:09:49,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:09:49,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:09:49,500 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 02:09:49,501 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 02:09:49,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:09:49,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:09:49,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:09:49,652 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:09:49,654 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:09:50,594 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:09:50,651 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:09:50,651 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 02:09:50,651 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:09:50 BoogieIcfgContainer [2023-11-29 02:09:50,652 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:09:50,654 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:09:50,654 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:09:50,657 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:09:50,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:09:48" (1/3) ... [2023-11-29 02:09:50,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d83ed32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:09:50, skipping insertion in model container [2023-11-29 02:09:50,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:09:49" (2/3) ... [2023-11-29 02:09:50,659 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d83ed32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:09:50, skipping insertion in model container [2023-11-29 02:09:50,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:09:50" (3/3) ... [2023-11-29 02:09:50,660 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-57.i [2023-11-29 02:09:50,681 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:09:50,681 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:09:50,740 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:09:50,746 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;@58e04bae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:09:50,747 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:09:50,752 INFO L276 IsEmpty]: Start isEmpty. Operand has 345 states, 229 states have (on average 1.6331877729257642) internal successors, (374), 230 states have internal predecessors, (374), 113 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2023-11-29 02:09:50,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2023-11-29 02:09:50,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:09:50,794 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:50,794 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:09:50,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:50,800 INFO L85 PathProgramCache]: Analyzing trace with hash 127803526, now seen corresponding path program 1 times [2023-11-29 02:09:50,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:50,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620931790] [2023-11-29 02:09:50,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:50,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:51,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:09:51,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620931790] [2023-11-29 02:09:51,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 02:09:51,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105973466] [2023-11-29 02:09:51,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:51,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:51,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:51,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:09:51,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:09:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:51,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 1651 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 02:09:51,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:09:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 25088 trivial. 0 not checked. [2023-11-29 02:09:51,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:09:51,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105973466] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:09:51,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:09:51,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:09:51,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428101249] [2023-11-29 02:09:51,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:09:51,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 02:09:51,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:09:51,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 02:09:51,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:09:51,843 INFO L87 Difference]: Start difference. First operand has 345 states, 229 states have (on average 1.6331877729257642) internal successors, (374), 230 states have internal predecessors, (374), 113 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) Second operand has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 2 states have call successors, (113), 2 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 2 states have call successors, (113) [2023-11-29 02:09:51,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:09:51,926 INFO L93 Difference]: Finished difference Result 687 states and 1311 transitions. [2023-11-29 02:09:51,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 02:09:51,929 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 2 states have call successors, (113), 2 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 2 states have call successors, (113) Word has length 729 [2023-11-29 02:09:51,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:09:51,942 INFO L225 Difference]: With dead ends: 687 [2023-11-29 02:09:51,943 INFO L226 Difference]: Without dead ends: 343 [2023-11-29 02:09:51,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 728 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 02:09:51,955 INFO L413 NwaCegarLoop]: 592 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, 592 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 02:09:51,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 592 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:09:51,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-11-29 02:09:52,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2023-11-29 02:09:52,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 228 states have (on average 1.618421052631579) internal successors, (369), 228 states have internal predecessors, (369), 113 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2023-11-29 02:09:52,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 595 transitions. [2023-11-29 02:09:52,055 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 595 transitions. Word has length 729 [2023-11-29 02:09:52,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:09:52,056 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 595 transitions. [2023-11-29 02:09:52,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 2 states have call successors, (113), 2 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 2 states have call successors, (113) [2023-11-29 02:09:52,056 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 595 transitions. [2023-11-29 02:09:52,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2023-11-29 02:09:52,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:09:52,131 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:52,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:09:52,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 02:09:52,332 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:09:52,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:52,333 INFO L85 PathProgramCache]: Analyzing trace with hash 628332928, now seen corresponding path program 1 times [2023-11-29 02:09:52,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:52,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569558821] [2023-11-29 02:09:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:52,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:52,481 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:09:52,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494543616] [2023-11-29 02:09:52,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:52,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:52,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:52,483 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:09:52,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:09:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:52,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 1651 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:09:52,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:09:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25312 trivial. 0 not checked. [2023-11-29 02:09:53,112 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:09:53,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:09:53,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569558821] [2023-11-29 02:09:53,113 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:09:53,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494543616] [2023-11-29 02:09:53,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494543616] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:09:53,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:09:53,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:09:53,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878645989] [2023-11-29 02:09:53,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:09:53,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:09:53,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:09:53,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:09:53,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:09:53,119 INFO L87 Difference]: Start difference. First operand 343 states and 595 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-29 02:09:53,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:09:53,506 INFO L93 Difference]: Finished difference Result 1458 states and 2553 transitions. [2023-11-29 02:09:53,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:09:53,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) Word has length 729 [2023-11-29 02:09:53,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:09:53,521 INFO L225 Difference]: With dead ends: 1458 [2023-11-29 02:09:53,522 INFO L226 Difference]: Without dead ends: 1116 [2023-11-29 02:09:53,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 727 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 02:09:53,525 INFO L413 NwaCegarLoop]: 1251 mSDtfsCounter, 1254 mSDsluCounter, 1798 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1254 SdHoareTripleChecker+Valid, 3049 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:09:53,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1254 Valid, 3049 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:09:53,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2023-11-29 02:09:53,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1108. [2023-11-29 02:09:53,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 801 states have (on average 1.6754057428214733) internal successors, (1342), 803 states have internal predecessors, (1342), 302 states have call successors, (302), 4 states have call predecessors, (302), 4 states have return successors, (302), 300 states have call predecessors, (302), 302 states have call successors, (302) [2023-11-29 02:09:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1946 transitions. [2023-11-29 02:09:53,680 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1946 transitions. Word has length 729 [2023-11-29 02:09:53,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:09:53,683 INFO L495 AbstractCegarLoop]: Abstraction has 1108 states and 1946 transitions. [2023-11-29 02:09:53,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-29 02:09:53,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1946 transitions. [2023-11-29 02:09:53,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2023-11-29 02:09:53,703 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:09:53,704 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:53,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:09:53,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 02:09:53,905 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:09:53,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:53,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1979718146, now seen corresponding path program 1 times [2023-11-29 02:09:53,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:53,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884759235] [2023-11-29 02:09:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:53,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:54,017 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:09:54,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389361045] [2023-11-29 02:09:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:54,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:54,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:54,019 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:09:54,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:09:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:54,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:09:54,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:09:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25312 trivial. 0 not checked. [2023-11-29 02:09:54,573 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:09:54,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:09:54,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884759235] [2023-11-29 02:09:54,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:09:54,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389361045] [2023-11-29 02:09:54,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389361045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:09:54,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:09:54,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:09:54,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093020177] [2023-11-29 02:09:54,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:09:54,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:09:54,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:09:54,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:09:54,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:09:54,578 INFO L87 Difference]: Start difference. First operand 1108 states and 1946 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-29 02:09:54,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:09:54,767 INFO L93 Difference]: Finished difference Result 3015 states and 5292 transitions. [2023-11-29 02:09:54,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:09:54,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) Word has length 729 [2023-11-29 02:09:54,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:09:54,785 INFO L225 Difference]: With dead ends: 3015 [2023-11-29 02:09:54,786 INFO L226 Difference]: Without dead ends: 1908 [2023-11-29 02:09:54,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:09:54,791 INFO L413 NwaCegarLoop]: 692 mSDtfsCounter, 353 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1945 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:09:54,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 1945 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:09:54,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2023-11-29 02:09:54,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1904. [2023-11-29 02:09:54,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1399 states have (on average 1.675482487491065) internal successors, (2344), 1405 states have internal predecessors, (2344), 496 states have call successors, (496), 8 states have call predecessors, (496), 8 states have return successors, (496), 490 states have call predecessors, (496), 496 states have call successors, (496) [2023-11-29 02:09:54,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 3336 transitions. [2023-11-29 02:09:54,997 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 3336 transitions. Word has length 729 [2023-11-29 02:09:54,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:09:54,999 INFO L495 AbstractCegarLoop]: Abstraction has 1904 states and 3336 transitions. [2023-11-29 02:09:54,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-29 02:09:54,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 3336 transitions. [2023-11-29 02:09:55,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2023-11-29 02:09:55,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:09:55,010 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:55,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:09:55,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:55,211 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:09:55,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:55,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1338607120, now seen corresponding path program 1 times [2023-11-29 02:09:55,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:55,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877351328] [2023-11-29 02:09:55,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:55,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:55,300 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:09:55,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223118044] [2023-11-29 02:09:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:55,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:55,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:55,302 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:09:55,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:09:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:55,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:09:55,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:09:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 11362 proven. 111 refuted. 0 times theorem prover too weak. 13839 trivial. 0 not checked. [2023-11-29 02:09:56,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:09:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 225 proven. 111 refuted. 0 times theorem prover too weak. 24976 trivial. 0 not checked. [2023-11-29 02:09:56,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:09:56,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877351328] [2023-11-29 02:09:56,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:09:56,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223118044] [2023-11-29 02:09:56,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223118044] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:09:56,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:09:56,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 02:09:56,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802913981] [2023-11-29 02:09:56,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:09:56,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:09:56,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:09:56,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:09:56,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:09:56,953 INFO L87 Difference]: Start difference. First operand 1904 states and 3336 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 2 states have call successors, (150), 2 states have call predecessors, (150), 4 states have return successors, (151), 2 states have call predecessors, (151), 2 states have call successors, (151) [2023-11-29 02:09:58,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:09:58,162 INFO L93 Difference]: Finished difference Result 3959 states and 6895 transitions. [2023-11-29 02:09:58,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:09:58,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 2 states have call successors, (150), 2 states have call predecessors, (150), 4 states have return successors, (151), 2 states have call predecessors, (151), 2 states have call successors, (151) Word has length 729 [2023-11-29 02:09:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:09:58,178 INFO L225 Difference]: With dead ends: 3959 [2023-11-29 02:09:58,178 INFO L226 Difference]: Without dead ends: 2056 [2023-11-29 02:09:58,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1460 GetRequests, 1450 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 02:09:58,184 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 892 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:09:58,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [967 Valid, 1363 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 02:09:58,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2023-11-29 02:09:58,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 2035. [2023-11-29 02:09:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 1452 states have (on average 1.6398071625344353) internal successors, (2381), 1459 states have internal predecessors, (2381), 571 states have call successors, (571), 11 states have call predecessors, (571), 11 states have return successors, (571), 564 states have call predecessors, (571), 571 states have call successors, (571) [2023-11-29 02:09:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 3523 transitions. [2023-11-29 02:09:58,358 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 3523 transitions. Word has length 729 [2023-11-29 02:09:58,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:09:58,360 INFO L495 AbstractCegarLoop]: Abstraction has 2035 states and 3523 transitions. [2023-11-29 02:09:58,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 2 states have call successors, (150), 2 states have call predecessors, (150), 4 states have return successors, (151), 2 states have call predecessors, (151), 2 states have call successors, (151) [2023-11-29 02:09:58,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 3523 transitions. [2023-11-29 02:09:58,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2023-11-29 02:09:58,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:09:58,367 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:58,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:09:58,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:58,568 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:09:58,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:58,569 INFO L85 PathProgramCache]: Analyzing trace with hash -584620914, now seen corresponding path program 1 times [2023-11-29 02:09:58,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:58,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149569596] [2023-11-29 02:09:58,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:58,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:58,657 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:09:58,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964755857] [2023-11-29 02:09:58,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:58,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:58,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:58,659 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:09:58,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:09:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:59,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 02:09:59,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:09:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 10677 proven. 63 refuted. 0 times theorem prover too weak. 14572 trivial. 0 not checked. [2023-11-29 02:09:59,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 273 proven. 63 refuted. 0 times theorem prover too weak. 24976 trivial. 0 not checked. [2023-11-29 02:10:00,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:00,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149569596] [2023-11-29 02:10:00,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:10:00,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964755857] [2023-11-29 02:10:00,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964755857] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:00,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:10:00,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 02:10:00,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91069031] [2023-11-29 02:10:00,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:00,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:10:00,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:00,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:10:00,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:10:00,193 INFO L87 Difference]: Start difference. First operand 2035 states and 3523 transitions. Second operand has 12 states, 12 states have (on average 19.25) internal successors, (231), 12 states have internal predecessors, (231), 5 states have call successors, (143), 3 states have call predecessors, (143), 5 states have return successors, (143), 5 states have call predecessors, (143), 5 states have call successors, (143) [2023-11-29 02:10:01,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:01,388 INFO L93 Difference]: Finished difference Result 3974 states and 6874 transitions. [2023-11-29 02:10:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:10:01,389 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 19.25) internal successors, (231), 12 states have internal predecessors, (231), 5 states have call successors, (143), 3 states have call predecessors, (143), 5 states have return successors, (143), 5 states have call predecessors, (143), 5 states have call successors, (143) Word has length 729 [2023-11-29 02:10:01,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:01,406 INFO L225 Difference]: With dead ends: 3974 [2023-11-29 02:10:01,407 INFO L226 Difference]: Without dead ends: 2063 [2023-11-29 02:10:01,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1460 GetRequests, 1446 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:10:01,415 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 1037 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:01,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1128 Valid, 1810 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 02:10:01,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2023-11-29 02:10:01,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 2043. [2023-11-29 02:10:01,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 1458 states have (on average 1.631687242798354) internal successors, (2379), 1465 states have internal predecessors, (2379), 571 states have call successors, (571), 13 states have call predecessors, (571), 13 states have return successors, (571), 564 states have call predecessors, (571), 571 states have call successors, (571) [2023-11-29 02:10:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 3521 transitions. [2023-11-29 02:10:01,691 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 3521 transitions. Word has length 729 [2023-11-29 02:10:01,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:10:01,693 INFO L495 AbstractCegarLoop]: Abstraction has 2043 states and 3521 transitions. [2023-11-29 02:10:01,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.25) internal successors, (231), 12 states have internal predecessors, (231), 5 states have call successors, (143), 3 states have call predecessors, (143), 5 states have return successors, (143), 5 states have call predecessors, (143), 5 states have call successors, (143) [2023-11-29 02:10:01,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 3521 transitions. [2023-11-29 02:10:01,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2023-11-29 02:10:01,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:10:01,709 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:01,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:10:01,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:01,912 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:10:01,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:01,913 INFO L85 PathProgramCache]: Analyzing trace with hash -639013812, now seen corresponding path program 1 times [2023-11-29 02:10:01,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:01,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716524402] [2023-11-29 02:10:01,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:01,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:02,026 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:10:02,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629403132] [2023-11-29 02:10:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:02,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:02,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:02,028 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:02,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:10:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:02,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:10:02,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 8212 proven. 66 refuted. 0 times theorem prover too weak. 17034 trivial. 0 not checked. [2023-11-29 02:10:02,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 270 proven. 66 refuted. 0 times theorem prover too weak. 24976 trivial. 0 not checked. [2023-11-29 02:10:02,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:02,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716524402] [2023-11-29 02:10:02,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:10:02,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629403132] [2023-11-29 02:10:02,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629403132] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:02,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:10:02,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 02:10:02,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089309799] [2023-11-29 02:10:02,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:02,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:10:02,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:02,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:10:02,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:10:02,991 INFO L87 Difference]: Start difference. First operand 2043 states and 3521 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) [2023-11-29 02:10:03,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:03,641 INFO L93 Difference]: Finished difference Result 3994 states and 6874 transitions. [2023-11-29 02:10:03,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:10:03,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) Word has length 729 [2023-11-29 02:10:03,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:03,655 INFO L225 Difference]: With dead ends: 3994 [2023-11-29 02:10:03,656 INFO L226 Difference]: Without dead ends: 2075 [2023-11-29 02:10:03,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1460 GetRequests, 1450 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 02:10:03,662 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 712 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:03,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [801 Valid, 1178 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:10:03,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2023-11-29 02:10:03,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2051. [2023-11-29 02:10:03,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 1464 states have (on average 1.6236338797814207) internal successors, (2377), 1471 states have internal predecessors, (2377), 571 states have call successors, (571), 15 states have call predecessors, (571), 15 states have return successors, (571), 564 states have call predecessors, (571), 571 states have call successors, (571) [2023-11-29 02:10:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 3519 transitions. [2023-11-29 02:10:03,871 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 3519 transitions. Word has length 729 [2023-11-29 02:10:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:10:03,872 INFO L495 AbstractCegarLoop]: Abstraction has 2051 states and 3519 transitions. [2023-11-29 02:10:03,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) [2023-11-29 02:10:03,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 3519 transitions. [2023-11-29 02:10:03,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2023-11-29 02:10:03,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:10:03,882 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:03,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:10:04,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:04,084 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:10:04,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:04,084 INFO L85 PathProgramCache]: Analyzing trace with hash -205284726, now seen corresponding path program 1 times [2023-11-29 02:10:04,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:04,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844350782] [2023-11-29 02:10:04,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:04,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:04,168 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:10:04,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659338373] [2023-11-29 02:10:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:04,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:04,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:04,170 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:04,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:10:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:04,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:10:04,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25312 trivial. 0 not checked. [2023-11-29 02:10:04,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:10:04,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:04,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844350782] [2023-11-29 02:10:04,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:10:04,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659338373] [2023-11-29 02:10:04,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659338373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:10:04,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:10:04,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:10:04,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095467847] [2023-11-29 02:10:04,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:10:04,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:10:04,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:04,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:10:04,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:10:04,720 INFO L87 Difference]: Start difference. First operand 2051 states and 3519 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-29 02:10:04,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:04,935 INFO L93 Difference]: Finished difference Result 5505 states and 9514 transitions. [2023-11-29 02:10:04,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:10:04,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) Word has length 729 [2023-11-29 02:10:04,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:04,961 INFO L225 Difference]: With dead ends: 5505 [2023-11-29 02:10:04,961 INFO L226 Difference]: Without dead ends: 3538 [2023-11-29 02:10:04,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 726 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 02:10:04,968 INFO L413 NwaCegarLoop]: 739 mSDtfsCounter, 355 mSDsluCounter, 1318 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 2057 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:04,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 2057 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:10:04,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2023-11-29 02:10:05,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 3528. [2023-11-29 02:10:05,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 2676 states have (on average 1.6629297458893872) internal successors, (4450), 2691 states have internal predecessors, (4450), 827 states have call successors, (827), 24 states have call predecessors, (827), 24 states have return successors, (827), 812 states have call predecessors, (827), 827 states have call successors, (827) [2023-11-29 02:10:05,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 6104 transitions. [2023-11-29 02:10:05,290 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 6104 transitions. Word has length 729 [2023-11-29 02:10:05,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:10:05,291 INFO L495 AbstractCegarLoop]: Abstraction has 3528 states and 6104 transitions. [2023-11-29 02:10:05,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-29 02:10:05,292 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 6104 transitions. [2023-11-29 02:10:05,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 731 [2023-11-29 02:10:05,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:10:05,305 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:05,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:10:05,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:05,505 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:10:05,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:05,506 INFO L85 PathProgramCache]: Analyzing trace with hash 103191878, now seen corresponding path program 1 times [2023-11-29 02:10:05,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:05,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399672188] [2023-11-29 02:10:05,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:05,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:05,608 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:10:05,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925268773] [2023-11-29 02:10:05,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:05,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:05,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:05,609 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:05,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:10:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:06,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:10:06,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 11286 proven. 225 refuted. 0 times theorem prover too weak. 13801 trivial. 0 not checked. [2023-11-29 02:10:06,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 111 proven. 225 refuted. 0 times theorem prover too weak. 24976 trivial. 0 not checked. [2023-11-29 02:10:07,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:07,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399672188] [2023-11-29 02:10:07,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:10:07,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925268773] [2023-11-29 02:10:07,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925268773] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:07,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:10:07,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 02:10:07,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301375965] [2023-11-29 02:10:07,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:07,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:10:07,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:07,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:10:07,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:10:07,144 INFO L87 Difference]: Start difference. First operand 3528 states and 6104 transitions. Second operand has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 2 states have call successors, (188), 2 states have call predecessors, (188), 4 states have return successors, (189), 2 states have call predecessors, (189), 2 states have call successors, (189) [2023-11-29 02:10:07,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:07,852 INFO L93 Difference]: Finished difference Result 7024 states and 12094 transitions. [2023-11-29 02:10:07,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:10:07,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 2 states have call successors, (188), 2 states have call predecessors, (188), 4 states have return successors, (189), 2 states have call predecessors, (189), 2 states have call successors, (189) Word has length 730 [2023-11-29 02:10:07,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:07,880 INFO L225 Difference]: With dead ends: 7024 [2023-11-29 02:10:07,880 INFO L226 Difference]: Without dead ends: 3624 [2023-11-29 02:10:07,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1462 GetRequests, 1452 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 02:10:07,890 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 304 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:07,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 1156 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:10:07,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3624 states. [2023-11-29 02:10:08,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3624 to 3536. [2023-11-29 02:10:08,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3536 states, 2687 states have (on average 1.6423520655005583) internal successors, (4413), 2702 states have internal predecessors, (4413), 819 states have call successors, (819), 29 states have call predecessors, (819), 29 states have return successors, (819), 804 states have call predecessors, (819), 819 states have call successors, (819) [2023-11-29 02:10:08,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3536 states to 3536 states and 6051 transitions. [2023-11-29 02:10:08,275 INFO L78 Accepts]: Start accepts. Automaton has 3536 states and 6051 transitions. Word has length 730 [2023-11-29 02:10:08,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:10:08,276 INFO L495 AbstractCegarLoop]: Abstraction has 3536 states and 6051 transitions. [2023-11-29 02:10:08,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 2 states have call successors, (188), 2 states have call predecessors, (188), 4 states have return successors, (189), 2 states have call predecessors, (189), 2 states have call successors, (189) [2023-11-29 02:10:08,277 INFO L276 IsEmpty]: Start isEmpty. Operand 3536 states and 6051 transitions. [2023-11-29 02:10:08,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 731 [2023-11-29 02:10:08,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:10:08,290 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:08,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:10:08,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:08,490 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:10:08,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:08,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1559008716, now seen corresponding path program 1 times [2023-11-29 02:10:08,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:08,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560063061] [2023-11-29 02:10:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:08,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:08,573 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:10:08,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136003417] [2023-11-29 02:10:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:08,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:08,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:08,575 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:08,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:10:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:09,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:10:09,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:09,544 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 12066 proven. 207 refuted. 0 times theorem prover too weak. 13039 trivial. 0 not checked. [2023-11-29 02:10:09,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 129 proven. 207 refuted. 0 times theorem prover too weak. 24976 trivial. 0 not checked. [2023-11-29 02:10:10,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:10,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560063061] [2023-11-29 02:10:10,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:10:10,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136003417] [2023-11-29 02:10:10,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136003417] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:10,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:10:10,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 02:10:10,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044777098] [2023-11-29 02:10:10,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:10,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:10:10,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:10,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:10:10,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:10:10,056 INFO L87 Difference]: Start difference. First operand 3536 states and 6051 transitions. Second operand has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 2 states have call successors, (182), 2 states have call predecessors, (182), 4 states have return successors, (183), 2 states have call predecessors, (183), 2 states have call successors, (183) [2023-11-29 02:10:10,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:10,713 INFO L93 Difference]: Finished difference Result 7022 states and 11975 transitions. [2023-11-29 02:10:10,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:10:10,714 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 2 states have call successors, (182), 2 states have call predecessors, (182), 4 states have return successors, (183), 2 states have call predecessors, (183), 2 states have call successors, (183) Word has length 730 [2023-11-29 02:10:10,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:10,734 INFO L225 Difference]: With dead ends: 7022 [2023-11-29 02:10:10,734 INFO L226 Difference]: Without dead ends: 3618 [2023-11-29 02:10:10,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1462 GetRequests, 1452 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 02:10:10,742 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 529 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:10,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 1163 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:10:10,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2023-11-29 02:10:11,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 3556. [2023-11-29 02:10:11,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 2702 states have (on average 1.6328645447816432) internal successors, (4412), 2717 states have internal predecessors, (4412), 819 states have call successors, (819), 34 states have call predecessors, (819), 34 states have return successors, (819), 804 states have call predecessors, (819), 819 states have call successors, (819) [2023-11-29 02:10:11,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 6050 transitions. [2023-11-29 02:10:11,123 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 6050 transitions. Word has length 730 [2023-11-29 02:10:11,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:10:11,124 INFO L495 AbstractCegarLoop]: Abstraction has 3556 states and 6050 transitions. [2023-11-29 02:10:11,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 2 states have call successors, (182), 2 states have call predecessors, (182), 4 states have return successors, (183), 2 states have call predecessors, (183), 2 states have call successors, (183) [2023-11-29 02:10:11,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 6050 transitions. [2023-11-29 02:10:11,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 731 [2023-11-29 02:10:11,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:10:11,134 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:11,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:10:11,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 02:10:11,335 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:10:11,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:11,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1424995210, now seen corresponding path program 1 times [2023-11-29 02:10:11,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:11,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419183127] [2023-11-29 02:10:11,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:11,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:11,398 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:10:11,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060366730] [2023-11-29 02:10:11,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:11,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:11,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:11,399 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:11,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:10:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:11,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:10:11,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25312 trivial. 0 not checked. [2023-11-29 02:10:11,877 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:10:11,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:11,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419183127] [2023-11-29 02:10:11,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:10:11,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060366730] [2023-11-29 02:10:11,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060366730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:10:11,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:10:11,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:10:11,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371899677] [2023-11-29 02:10:11,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:10:11,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:10:11,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:11,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:10:11,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:10:11,881 INFO L87 Difference]: Start difference. First operand 3556 states and 6050 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-29 02:10:12,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:12,263 INFO L93 Difference]: Finished difference Result 7024 states and 11937 transitions. [2023-11-29 02:10:12,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:10:12,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) Word has length 730 [2023-11-29 02:10:12,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:12,287 INFO L225 Difference]: With dead ends: 7024 [2023-11-29 02:10:12,287 INFO L226 Difference]: Without dead ends: 3572 [2023-11-29 02:10:12,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 727 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 02:10:12,295 INFO L413 NwaCegarLoop]: 691 mSDtfsCounter, 174 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:12,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1806 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:10:12,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2023-11-29 02:10:12,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 3572. [2023-11-29 02:10:12,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3572 states, 2714 states have (on average 1.6241709653647753) internal successors, (4408), 2729 states have internal predecessors, (4408), 819 states have call successors, (819), 38 states have call predecessors, (819), 38 states have return successors, (819), 804 states have call predecessors, (819), 819 states have call successors, (819) [2023-11-29 02:10:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3572 states to 3572 states and 6046 transitions. [2023-11-29 02:10:12,525 INFO L78 Accepts]: Start accepts. Automaton has 3572 states and 6046 transitions. Word has length 730 [2023-11-29 02:10:12,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:10:12,525 INFO L495 AbstractCegarLoop]: Abstraction has 3572 states and 6046 transitions. [2023-11-29 02:10:12,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-29 02:10:12,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3572 states and 6046 transitions. [2023-11-29 02:10:12,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 731 [2023-11-29 02:10:12,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:10:12,534 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:12,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:10:12,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 02:10:12,735 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:10:12,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:12,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1487034824, now seen corresponding path program 1 times [2023-11-29 02:10:12,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:12,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838126922] [2023-11-29 02:10:12,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:12,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:12,809 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:10:12,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062453408] [2023-11-29 02:10:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:12,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:12,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:12,810 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:12,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:10:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:13,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:10:13,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 15996 proven. 306 refuted. 0 times theorem prover too weak. 9010 trivial. 0 not checked. [2023-11-29 02:10:14,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 213 proven. 123 refuted. 0 times theorem prover too weak. 24976 trivial. 0 not checked. [2023-11-29 02:10:15,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:15,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838126922] [2023-11-29 02:10:15,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:10:15,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062453408] [2023-11-29 02:10:15,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062453408] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:15,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:10:15,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2023-11-29 02:10:15,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611641422] [2023-11-29 02:10:15,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:15,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:10:15,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:15,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:10:15,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:10:15,411 INFO L87 Difference]: Start difference. First operand 3572 states and 6046 transitions. Second operand has 15 states, 15 states have (on average 17.666666666666668) internal successors, (265), 15 states have internal predecessors, (265), 4 states have call successors, (175), 3 states have call predecessors, (175), 6 states have return successors, (176), 4 states have call predecessors, (176), 4 states have call successors, (176) [2023-11-29 02:10:19,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:19,842 INFO L93 Difference]: Finished difference Result 18270 states and 30382 transitions. [2023-11-29 02:10:19,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 02:10:19,843 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 17.666666666666668) internal successors, (265), 15 states have internal predecessors, (265), 4 states have call successors, (175), 3 states have call predecessors, (175), 6 states have return successors, (176), 4 states have call predecessors, (176), 4 states have call successors, (176) Word has length 730 [2023-11-29 02:10:19,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:19,885 INFO L225 Difference]: With dead ends: 18270 [2023-11-29 02:10:19,885 INFO L226 Difference]: Without dead ends: 14834 [2023-11-29 02:10:19,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1498 GetRequests, 1449 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=726, Invalid=1824, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 02:10:19,896 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 3712 mSDsluCounter, 2302 mSDsCounter, 0 mSdLazyCounter, 2177 mSolverCounterSat, 1872 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3761 SdHoareTripleChecker+Valid, 2812 SdHoareTripleChecker+Invalid, 4049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1872 IncrementalHoareTripleChecker+Valid, 2177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:19,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3761 Valid, 2812 Invalid, 4049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1872 Valid, 2177 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-29 02:10:19,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14834 states. [2023-11-29 02:10:20,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14834 to 9608. [2023-11-29 02:10:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9608 states, 7499 states have (on average 1.6235498066408856) internal successors, (12175), 7546 states have internal predecessors, (12175), 1999 states have call successors, (1999), 109 states have call predecessors, (1999), 109 states have return successors, (1999), 1952 states have call predecessors, (1999), 1999 states have call successors, (1999) [2023-11-29 02:10:20,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9608 states to 9608 states and 16173 transitions. [2023-11-29 02:10:20,993 INFO L78 Accepts]: Start accepts. Automaton has 9608 states and 16173 transitions. Word has length 730 [2023-11-29 02:10:20,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:10:20,994 INFO L495 AbstractCegarLoop]: Abstraction has 9608 states and 16173 transitions. [2023-11-29 02:10:20,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 17.666666666666668) internal successors, (265), 15 states have internal predecessors, (265), 4 states have call successors, (175), 3 states have call predecessors, (175), 6 states have return successors, (176), 4 states have call predecessors, (176), 4 states have call successors, (176) [2023-11-29 02:10:20,994 INFO L276 IsEmpty]: Start isEmpty. Operand 9608 states and 16173 transitions. [2023-11-29 02:10:21,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2023-11-29 02:10:21,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:10:21,012 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:21,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:10:21,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 02:10:21,213 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:10:21,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:21,213 INFO L85 PathProgramCache]: Analyzing trace with hash -940620415, now seen corresponding path program 1 times [2023-11-29 02:10:21,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:21,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225875638] [2023-11-29 02:10:21,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:21,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:21,320 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:10:21,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089162587] [2023-11-29 02:10:21,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:21,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:21,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:21,322 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:21,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:10:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:21,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:10:21,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25312 trivial. 0 not checked. [2023-11-29 02:10:22,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:10:22,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:22,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225875638] [2023-11-29 02:10:22,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:10:22,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089162587] [2023-11-29 02:10:22,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089162587] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:10:22,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:10:22,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:10:22,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131376997] [2023-11-29 02:10:22,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:10:22,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:10:22,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:22,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:10:22,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:10:22,645 INFO L87 Difference]: Start difference. First operand 9608 states and 16173 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-29 02:10:23,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:23,864 INFO L93 Difference]: Finished difference Result 28512 states and 48075 transitions. [2023-11-29 02:10:23,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:10:23,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) Word has length 731 [2023-11-29 02:10:23,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:23,919 INFO L225 Difference]: With dead ends: 28512 [2023-11-29 02:10:23,919 INFO L226 Difference]: Without dead ends: 19060 [2023-11-29 02:10:23,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 729 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 02:10:23,940 INFO L413 NwaCegarLoop]: 725 mSDtfsCounter, 249 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:23,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 1295 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:10:23,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19060 states. [2023-11-29 02:10:25,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19060 to 19044. [2023-11-29 02:10:25,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19044 states, 14911 states have (on average 1.6219569445375897) internal successors, (24185), 15004 states have internal predecessors, (24185), 3923 states have call successors, (3923), 209 states have call predecessors, (3923), 209 states have return successors, (3923), 3830 states have call predecessors, (3923), 3923 states have call successors, (3923) [2023-11-29 02:10:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19044 states to 19044 states and 32031 transitions. [2023-11-29 02:10:25,520 INFO L78 Accepts]: Start accepts. Automaton has 19044 states and 32031 transitions. Word has length 731 [2023-11-29 02:10:25,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:10:25,520 INFO L495 AbstractCegarLoop]: Abstraction has 19044 states and 32031 transitions. [2023-11-29 02:10:25,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-29 02:10:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 19044 states and 32031 transitions. [2023-11-29 02:10:25,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 733 [2023-11-29 02:10:25,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:10:25,539 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:25,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:10:25,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:25,740 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:10:25,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:25,741 INFO L85 PathProgramCache]: Analyzing trace with hash -131741855, now seen corresponding path program 1 times [2023-11-29 02:10:25,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:25,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049059669] [2023-11-29 02:10:25,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:25,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:25,811 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:10:25,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028560144] [2023-11-29 02:10:25,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:25,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:25,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:25,813 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:25,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:10:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:26,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 1652 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:10:26,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25312 trivial. 0 not checked. [2023-11-29 02:10:26,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:10:26,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:26,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049059669] [2023-11-29 02:10:26,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:10:26,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028560144] [2023-11-29 02:10:26,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028560144] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:10:26,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:10:26,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:10:26,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213722807] [2023-11-29 02:10:26,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:10:26,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:10:26,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:26,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:10:26,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:10:26,918 INFO L87 Difference]: Start difference. First operand 19044 states and 32031 transitions. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 3 states have internal predecessors, (170), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-29 02:10:29,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:29,809 INFO L93 Difference]: Finished difference Result 47398 states and 79804 transitions. [2023-11-29 02:10:29,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:10:29,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 3 states have internal predecessors, (170), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) Word has length 732 [2023-11-29 02:10:29,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:29,916 INFO L225 Difference]: With dead ends: 47398 [2023-11-29 02:10:29,917 INFO L226 Difference]: Without dead ends: 37946 [2023-11-29 02:10:29,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 729 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 02:10:29,937 INFO L413 NwaCegarLoop]: 684 mSDtfsCounter, 665 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:29,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 1590 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:10:29,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37946 states. [2023-11-29 02:10:33,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37946 to 37930. [2023-11-29 02:10:33,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37930 states, 29749 states have (on average 1.6232478402635382) internal successors, (48290), 29934 states have internal predecessors, (48290), 7771 states have call successors, (7771), 409 states have call predecessors, (7771), 409 states have return successors, (7771), 7586 states have call predecessors, (7771), 7771 states have call successors, (7771) [2023-11-29 02:10:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37930 states to 37930 states and 63832 transitions. [2023-11-29 02:10:33,273 INFO L78 Accepts]: Start accepts. Automaton has 37930 states and 63832 transitions. Word has length 732 [2023-11-29 02:10:33,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:10:33,273 INFO L495 AbstractCegarLoop]: Abstraction has 37930 states and 63832 transitions. [2023-11-29 02:10:33,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 3 states have internal predecessors, (170), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-29 02:10:33,274 INFO L276 IsEmpty]: Start isEmpty. Operand 37930 states and 63832 transitions. [2023-11-29 02:10:33,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 733 [2023-11-29 02:10:33,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:10:33,311 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:33,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:10:33,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 02:10:33,511 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:10:33,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:33,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1193114339, now seen corresponding path program 1 times [2023-11-29 02:10:33,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:33,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870506371] [2023-11-29 02:10:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:33,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:33,597 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:10:33,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089766154] [2023-11-29 02:10:33,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:33,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:33,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:33,599 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:33,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:10:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:34,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 1652 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:10:34,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 10318 proven. 93 refuted. 0 times theorem prover too weak. 14901 trivial. 0 not checked. [2023-11-29 02:10:35,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:37,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:37,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870506371] [2023-11-29 02:10:37,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:10:37,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089766154] [2023-11-29 02:10:37,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089766154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:10:37,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:10:37,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-29 02:10:37,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040774031] [2023-11-29 02:10:37,025 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:37,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:10:37,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:37,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:10:37,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-11-29 02:10:37,028 INFO L87 Difference]: Start difference. First operand 37930 states and 63832 transitions. Second operand has 11 states, 11 states have (on average 16.0) internal successors, (176), 10 states have internal predecessors, (176), 2 states have call successors, (113), 2 states have call predecessors, (113), 3 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) [2023-11-29 02:11:08,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:11:08,475 INFO L93 Difference]: Finished difference Result 279670 states and 469830 transitions. [2023-11-29 02:11:08,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 02:11:08,476 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 16.0) internal successors, (176), 10 states have internal predecessors, (176), 2 states have call successors, (113), 2 states have call predecessors, (113), 3 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) Word has length 732 [2023-11-29 02:11:08,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:11:08,948 INFO L225 Difference]: With dead ends: 279670 [2023-11-29 02:11:08,948 INFO L226 Difference]: Without dead ends: 241896 [2023-11-29 02:11:09,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=435, Invalid=1125, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 02:11:09,034 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 3442 mSDsluCounter, 4214 mSDsCounter, 0 mSdLazyCounter, 3663 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3604 SdHoareTripleChecker+Valid, 4928 SdHoareTripleChecker+Invalid, 4136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 3663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:11:09,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3604 Valid, 4928 Invalid, 4136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 3663 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2023-11-29 02:11:09,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241896 states. [2023-11-29 02:11:24,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241896 to 155782. [2023-11-29 02:11:24,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155782 states, 126105 states have (on average 1.6455969231989216) internal successors, (207518), 126858 states have internal predecessors, (207518), 28283 states have call successors, (28283), 1393 states have call predecessors, (28283), 1393 states have return successors, (28283), 27530 states have call predecessors, (28283), 28283 states have call successors, (28283) [2023-11-29 02:11:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155782 states to 155782 states and 264084 transitions. [2023-11-29 02:11:24,893 INFO L78 Accepts]: Start accepts. Automaton has 155782 states and 264084 transitions. Word has length 732 [2023-11-29 02:11:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:11:24,894 INFO L495 AbstractCegarLoop]: Abstraction has 155782 states and 264084 transitions. [2023-11-29 02:11:24,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.0) internal successors, (176), 10 states have internal predecessors, (176), 2 states have call successors, (113), 2 states have call predecessors, (113), 3 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) [2023-11-29 02:11:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 155782 states and 264084 transitions. [2023-11-29 02:11:25,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 733 [2023-11-29 02:11:25,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:11:25,248 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:25,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:11:25,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 02:11:25,456 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:11:25,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:11:25,457 INFO L85 PathProgramCache]: Analyzing trace with hash 2147054497, now seen corresponding path program 1 times [2023-11-29 02:11:25,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:11:25,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549968937] [2023-11-29 02:11:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:11:25,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:11:25,737 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:11:25,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330009882] [2023-11-29 02:11:25,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:11:25,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:11:25,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:11:25,739 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:11:25,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:11:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:11:26,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:11:26,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:11:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 16304 proven. 0 refuted. 0 times theorem prover too weak. 9008 trivial. 0 not checked. [2023-11-29 02:11:27,805 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:11:27,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:11:27,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549968937] [2023-11-29 02:11:27,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:11:27,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330009882] [2023-11-29 02:11:27,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330009882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:11:27,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:11:27,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:11:27,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035882428] [2023-11-29 02:11:27,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:11:27,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:11:27,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:11:27,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:11:27,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:11:27,808 INFO L87 Difference]: Start difference. First operand 155782 states and 264084 transitions. Second operand has 5 states, 5 states have (on average 35.2) internal successors, (176), 4 states have internal predecessors, (176), 3 states have call successors, (113), 3 states have call predecessors, (113), 3 states have return successors, (113), 3 states have call predecessors, (113), 3 states have call successors, (113) [2023-11-29 02:11:53,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:11:53,574 INFO L93 Difference]: Finished difference Result 459738 states and 779136 transitions. [2023-11-29 02:11:53,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:11:53,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.2) internal successors, (176), 4 states have internal predecessors, (176), 3 states have call successors, (113), 3 states have call predecessors, (113), 3 states have return successors, (113), 3 states have call predecessors, (113), 3 states have call successors, (113) Word has length 732 [2023-11-29 02:11:53,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:11:54,262 INFO L225 Difference]: With dead ends: 459738 [2023-11-29 02:11:54,263 INFO L226 Difference]: Without dead ends: 304112 [2023-11-29 02:11:54,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 728 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:11:54,454 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 953 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 953 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:11:54,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [953 Valid, 1291 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:11:54,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304112 states. [2023-11-29 02:12:23,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304112 to 304110. [2023-11-29 02:12:23,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304110 states, 244841 states have (on average 1.632614635620668) internal successors, (399731), 246346 states have internal predecessors, (399731), 56491 states have call successors, (56491), 2777 states have call predecessors, (56491), 2777 states have return successors, (56491), 54986 states have call predecessors, (56491), 56491 states have call successors, (56491) [2023-11-29 02:12:25,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304110 states to 304110 states and 512713 transitions. [2023-11-29 02:12:25,371 INFO L78 Accepts]: Start accepts. Automaton has 304110 states and 512713 transitions. Word has length 732 [2023-11-29 02:12:25,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:12:25,372 INFO L495 AbstractCegarLoop]: Abstraction has 304110 states and 512713 transitions. [2023-11-29 02:12:25,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.2) internal successors, (176), 4 states have internal predecessors, (176), 3 states have call successors, (113), 3 states have call predecessors, (113), 3 states have return successors, (113), 3 states have call predecessors, (113), 3 states have call successors, (113) [2023-11-29 02:12:25,373 INFO L276 IsEmpty]: Start isEmpty. Operand 304110 states and 512713 transitions. [2023-11-29 02:12:25,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 733 [2023-11-29 02:12:25,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:12:25,729 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:25,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 02:12:25,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 02:12:25,930 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:12:25,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:12:25,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1224789727, now seen corresponding path program 1 times [2023-11-29 02:12:25,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:12:25,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429973597] [2023-11-29 02:12:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:12:25,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:12:25,982 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:12:25,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058888800] [2023-11-29 02:12:25,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:12:25,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:25,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:12:25,984 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:12:25,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa96037d-3669-4a8d-81a5-4d39b19a9a2d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:12:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:26,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 1652 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 02:12:26,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:12:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 11918 proven. 69 refuted. 0 times theorem prover too weak. 13325 trivial. 0 not checked. [2023-11-29 02:12:30,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:12:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25312 trivial. 0 not checked. [2023-11-29 02:12:58,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:12:58,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429973597] [2023-11-29 02:12:58,259 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:12:58,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058888800] [2023-11-29 02:12:58,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058888800] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:12:58,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:12:58,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [20] total 32 [2023-11-29 02:12:58,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911727067] [2023-11-29 02:12:58,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:12:58,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:12:58,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:12:58,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:12:58,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2023-11-29 02:12:58,263 INFO L87 Difference]: Start difference. First operand 304110 states and 512713 transitions. Second operand has 14 states, 14 states have (on average 12.142857142857142) internal successors, (170), 14 states have internal predecessors, (170), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-29 02:13:14,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1]