./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-47.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_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/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_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-47.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/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_b297790c-c240-4a7e-a35e-c3a4e842e495/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 b8b51c0bc0ba3661a7b1a9c8e46d0f6e48dd6a19c04a6cc013209e59e55dc2b6 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:32:05,971 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:32:06,034 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:32:06,040 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:32:06,041 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:32:06,067 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:32:06,067 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:32:06,068 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:32:06,069 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:32:06,069 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:32:06,070 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:32:06,070 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:32:06,071 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:32:06,071 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:32:06,072 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:32:06,073 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:32:06,073 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:32:06,074 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:32:06,074 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:32:06,075 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:32:06,075 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:32:06,076 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:32:06,076 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:32:06,077 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:32:06,077 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:32:06,077 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:32:06,078 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:32:06,078 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:32:06,079 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:32:06,079 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:32:06,080 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:32:06,080 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:32:06,081 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:32:06,081 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:32:06,081 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:32:06,082 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:32:06,082 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:32:06,083 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:32:06,083 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:32:06,083 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:32:06,084 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:32:06,084 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:32:06,084 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_b297790c-c240-4a7e-a35e-c3a4e842e495/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8b51c0bc0ba3661a7b1a9c8e46d0f6e48dd6a19c04a6cc013209e59e55dc2b6 [2023-11-29 00:32:06,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:32:06,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:32:06,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:32:06,341 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:32:06,341 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:32:06,343 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-47.i [2023-11-29 00:32:09,122 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:32:09,334 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:32:09,335 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-47.i [2023-11-29 00:32:09,350 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/data/61544cfce/8c541dcf0eae476d810c3856f5cf9dde/FLAG7792c4f87 [2023-11-29 00:32:09,365 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/data/61544cfce/8c541dcf0eae476d810c3856f5cf9dde [2023-11-29 00:32:09,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:32:09,369 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:32:09,371 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:32:09,371 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:32:09,376 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:32:09,377 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:32:09" (1/1) ... [2023-11-29 00:32:09,378 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@374fda4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:32:09, skipping insertion in model container [2023-11-29 00:32:09,378 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:32:09" (1/1) ... [2023-11-29 00:32:09,429 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:32:09,562 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_b297790c-c240-4a7e-a35e-c3a4e842e495/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-47.i[916,929] [2023-11-29 00:32:09,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:32:09,740 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:32:09,749 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_b297790c-c240-4a7e-a35e-c3a4e842e495/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-47.i[916,929] [2023-11-29 00:32:09,825 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:32:09,847 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:32:09,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:32:09 WrapperNode [2023-11-29 00:32:09,848 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:32:09,849 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:32:09,849 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:32:09,849 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:32:09,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:32:09" (1/1) ... [2023-11-29 00:32:09,882 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:32:09" (1/1) ... [2023-11-29 00:32:09,973 INFO L138 Inliner]: procedures = 26, calls = 112, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 875 [2023-11-29 00:32:09,973 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:32:09,974 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:32:09,974 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:32:09,974 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:32:09,986 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:32:09" (1/1) ... [2023-11-29 00:32:09,986 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:32:09" (1/1) ... [2023-11-29 00:32:09,997 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:32:09" (1/1) ... [2023-11-29 00:32:10,105 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 00:32:10,105 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:32:09" (1/1) ... [2023-11-29 00:32:10,105 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:32:09" (1/1) ... [2023-11-29 00:32:10,133 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:32:09" (1/1) ... [2023-11-29 00:32:10,142 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:32:09" (1/1) ... [2023-11-29 00:32:10,158 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:32:09" (1/1) ... [2023-11-29 00:32:10,164 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:32:09" (1/1) ... [2023-11-29 00:32:10,182 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:32:10,183 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:32:10,183 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:32:10,183 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:32:10,184 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:32:09" (1/1) ... [2023-11-29 00:32:10,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:32:10,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:32:10,213 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:32:10,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:32:10,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:32:10,247 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 00:32:10,247 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 00:32:10,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:32:10,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:32:10,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:32:10,395 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:32:10,397 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:32:11,410 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:32:11,468 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:32:11,469 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 00:32:11,469 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:32:11 BoogieIcfgContainer [2023-11-29 00:32:11,469 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:32:11,472 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:32:11,472 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:32:11,475 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:32:11,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:32:09" (1/3) ... [2023-11-29 00:32:11,476 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47734ebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:32:11, skipping insertion in model container [2023-11-29 00:32:11,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:32:09" (2/3) ... [2023-11-29 00:32:11,477 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47734ebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:32:11, skipping insertion in model container [2023-11-29 00:32:11,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:32:11" (3/3) ... [2023-11-29 00:32:11,479 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-47.i [2023-11-29 00:32:11,499 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:32:11,499 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:32:11,562 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:32:11,569 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;@5da52230, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:32:11,569 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:32:11,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 333 states, 231 states have (on average 1.6666666666666667) internal successors, (385), 232 states have internal predecessors, (385), 99 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-29 00:32:11,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2023-11-29 00:32:11,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:32:11,616 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:32:11,617 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:32:11,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:32:11,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1196940317, now seen corresponding path program 1 times [2023-11-29 00:32:11,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:32:11,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030747288] [2023-11-29 00:32:11,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:11,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:32:11,919 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:32:11,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639148070] [2023-11-29 00:32:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:11,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:32:11,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:32:11,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:32:11,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:32:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:12,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 1467 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 00:32:12,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:32:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-29 00:32:12,522 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:32:12,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:32:12,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030747288] [2023-11-29 00:32:12,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:32:12,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639148070] [2023-11-29 00:32:12,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639148070] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:32:12,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:32:12,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:32:12,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854104344] [2023-11-29 00:32:12,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:32:12,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:32:12,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:32:12,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:32:12,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:32:12,567 INFO L87 Difference]: Start difference. First operand has 333 states, 231 states have (on average 1.6666666666666667) internal successors, (385), 232 states have internal predecessors, (385), 99 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:32:12,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:32:12,662 INFO L93 Difference]: Finished difference Result 663 states and 1263 transitions. [2023-11-29 00:32:12,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:32:12,665 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 643 [2023-11-29 00:32:12,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:32:12,683 INFO L225 Difference]: With dead ends: 663 [2023-11-29 00:32:12,683 INFO L226 Difference]: Without dead ends: 331 [2023-11-29 00:32:12,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 642 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 00:32:12,693 INFO L413 NwaCegarLoop]: 570 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, 570 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 00:32:12,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 570 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:32:12,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-11-29 00:32:12,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2023-11-29 00:32:12,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 230 states have (on average 1.6304347826086956) internal successors, (375), 230 states have internal predecessors, (375), 99 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-29 00:32:12,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 573 transitions. [2023-11-29 00:32:12,801 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 573 transitions. Word has length 643 [2023-11-29 00:32:12,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:32:12,805 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 573 transitions. [2023-11-29 00:32:12,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:32:12,806 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 573 transitions. [2023-11-29 00:32:12,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2023-11-29 00:32:12,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:32:12,829 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:32:12,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:32:13,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 00:32:13,030 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:32:13,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:32:13,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1138081008, now seen corresponding path program 1 times [2023-11-29 00:32:13,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:32:13,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374172104] [2023-11-29 00:32:13,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:13,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:32:13,134 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:32:13,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169684892] [2023-11-29 00:32:13,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:13,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:32:13,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:32:13,137 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:32:13,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:32:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:13,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:32:13,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:32:14,704 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-29 00:32:14,704 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:32:14,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:32:14,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374172104] [2023-11-29 00:32:14,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:32:14,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169684892] [2023-11-29 00:32:14,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169684892] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:32:14,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:32:14,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:32:14,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907121954] [2023-11-29 00:32:14,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:32:14,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:32:14,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:32:14,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:32:14,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:32:14,711 INFO L87 Difference]: Start difference. First operand 331 states and 573 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 5 states have internal predecessors, (152), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:32:16,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:32:16,329 INFO L93 Difference]: Finished difference Result 1638 states and 2833 transitions. [2023-11-29 00:32:16,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:32:16,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 5 states have internal predecessors, (152), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 644 [2023-11-29 00:32:16,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:32:16,344 INFO L225 Difference]: With dead ends: 1638 [2023-11-29 00:32:16,344 INFO L226 Difference]: Without dead ends: 1308 [2023-11-29 00:32:16,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:32:16,348 INFO L413 NwaCegarLoop]: 848 mSDtfsCounter, 1707 mSDsluCounter, 2058 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1707 SdHoareTripleChecker+Valid, 2906 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:32:16,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1707 Valid, 2906 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 00:32:16,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2023-11-29 00:32:16,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 917. [2023-11-29 00:32:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 690 states have (on average 1.6855072463768115) internal successors, (1163), 691 states have internal predecessors, (1163), 223 states have call successors, (223), 3 states have call predecessors, (223), 3 states have return successors, (223), 222 states have call predecessors, (223), 223 states have call successors, (223) [2023-11-29 00:32:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1609 transitions. [2023-11-29 00:32:16,578 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1609 transitions. Word has length 644 [2023-11-29 00:32:16,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:32:16,581 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1609 transitions. [2023-11-29 00:32:16,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 5 states have internal predecessors, (152), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:32:16,581 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1609 transitions. [2023-11-29 00:32:16,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2023-11-29 00:32:16,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:32:16,590 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:32:16,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:32:16,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:32:16,791 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:32:16,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:32:16,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1154285040, now seen corresponding path program 1 times [2023-11-29 00:32:16,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:32:16,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978803168] [2023-11-29 00:32:16,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:16,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:32:16,879 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:32:16,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [692054001] [2023-11-29 00:32:16,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:16,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:32:16,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:32:16,881 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:32:16,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:32:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:17,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:32:17,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:32:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-29 00:32:17,351 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:32:17,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:32:17,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978803168] [2023-11-29 00:32:17,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:32:17,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692054001] [2023-11-29 00:32:17,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692054001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:32:17,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:32:17,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:32:17,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593084559] [2023-11-29 00:32:17,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:32:17,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:32:17,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:32:17,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:32:17,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:32:17,355 INFO L87 Difference]: Start difference. First operand 917 states and 1609 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:32:17,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:32:17,476 INFO L93 Difference]: Finished difference Result 2508 states and 4419 transitions. [2023-11-29 00:32:17,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:32:17,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 644 [2023-11-29 00:32:17,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:32:17,491 INFO L225 Difference]: With dead ends: 2508 [2023-11-29 00:32:17,492 INFO L226 Difference]: Without dead ends: 1592 [2023-11-29 00:32:17,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 642 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 00:32:17,496 INFO L413 NwaCegarLoop]: 811 mSDtfsCounter, 363 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:32:17,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 1353 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:32:17,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2023-11-29 00:32:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1588. [2023-11-29 00:32:17,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1279 states have (on average 1.7068021892103205) internal successors, (2183), 1283 states have internal predecessors, (2183), 302 states have call successors, (302), 6 states have call predecessors, (302), 6 states have return successors, (302), 298 states have call predecessors, (302), 302 states have call successors, (302) [2023-11-29 00:32:17,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 2787 transitions. [2023-11-29 00:32:17,677 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 2787 transitions. Word has length 644 [2023-11-29 00:32:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:32:17,678 INFO L495 AbstractCegarLoop]: Abstraction has 1588 states and 2787 transitions. [2023-11-29 00:32:17,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:32:17,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 2787 transitions. [2023-11-29 00:32:17,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2023-11-29 00:32:17,687 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:32:17,688 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:32:17,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:32:17,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:32:17,889 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:32:17,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:32:17,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1097174767, now seen corresponding path program 1 times [2023-11-29 00:32:17,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:32:17,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5606068] [2023-11-29 00:32:17,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:17,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:32:17,967 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:32:17,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282933472] [2023-11-29 00:32:17,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:17,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:32:17,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:32:17,969 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:32:17,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:32:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:18,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 1470 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:32:18,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:32:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-29 00:32:18,517 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:32:18,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:32:18,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5606068] [2023-11-29 00:32:18,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:32:18,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282933472] [2023-11-29 00:32:18,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282933472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:32:18,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:32:18,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:32:18,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473996737] [2023-11-29 00:32:18,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:32:18,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:32:18,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:32:18,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:32:18,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:32:18,524 INFO L87 Difference]: Start difference. First operand 1588 states and 2787 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:32:18,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:32:18,681 INFO L93 Difference]: Finished difference Result 3217 states and 5642 transitions. [2023-11-29 00:32:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:32:18,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 645 [2023-11-29 00:32:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:32:18,698 INFO L225 Difference]: With dead ends: 3217 [2023-11-29 00:32:18,699 INFO L226 Difference]: Without dead ends: 1630 [2023-11-29 00:32:18,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 643 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 00:32:18,706 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 313 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:32:18,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 1157 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:32:18,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2023-11-29 00:32:18,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1332. [2023-11-29 00:32:18,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1103 states have (on average 1.727107887579329) internal successors, (1905), 1104 states have internal predecessors, (1905), 223 states have call successors, (223), 5 states have call predecessors, (223), 5 states have return successors, (223), 222 states have call predecessors, (223), 223 states have call successors, (223) [2023-11-29 00:32:18,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 2351 transitions. [2023-11-29 00:32:18,846 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 2351 transitions. Word has length 645 [2023-11-29 00:32:18,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:32:18,848 INFO L495 AbstractCegarLoop]: Abstraction has 1332 states and 2351 transitions. [2023-11-29 00:32:18,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:32:18,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 2351 transitions. [2023-11-29 00:32:18,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2023-11-29 00:32:18,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:32:18,858 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:32:18,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:32:19,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:32:19,061 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:32:19,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:32:19,062 INFO L85 PathProgramCache]: Analyzing trace with hash 953809231, now seen corresponding path program 1 times [2023-11-29 00:32:19,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:32:19,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574600035] [2023-11-29 00:32:19,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:19,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:32:19,136 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:32:19,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571224654] [2023-11-29 00:32:19,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:19,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:32:19,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:32:19,138 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:32:19,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:32:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:19,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:32:19,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:32:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-29 00:32:19,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:32:19,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:32:19,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574600035] [2023-11-29 00:32:19,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:32:19,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571224654] [2023-11-29 00:32:19,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571224654] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:32:19,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:32:19,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:32:19,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109148609] [2023-11-29 00:32:19,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:32:19,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:32:19,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:32:19,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:32:19,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:32:19,628 INFO L87 Difference]: Start difference. First operand 1332 states and 2351 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:32:19,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:32:19,766 INFO L93 Difference]: Finished difference Result 3994 states and 7051 transitions. [2023-11-29 00:32:19,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:32:19,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 645 [2023-11-29 00:32:19,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:32:19,787 INFO L225 Difference]: With dead ends: 3994 [2023-11-29 00:32:19,787 INFO L226 Difference]: Without dead ends: 2663 [2023-11-29 00:32:19,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 643 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 00:32:19,793 INFO L413 NwaCegarLoop]: 1009 mSDtfsCounter, 553 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:32:19,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 1568 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:32:19,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2023-11-29 00:32:20,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 2651. [2023-11-29 00:32:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2651 states, 2194 states have (on average 1.7224247948951685) internal successors, (3779), 2196 states have internal predecessors, (3779), 446 states have call successors, (446), 10 states have call predecessors, (446), 10 states have return successors, (446), 444 states have call predecessors, (446), 446 states have call successors, (446) [2023-11-29 00:32:20,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 4671 transitions. [2023-11-29 00:32:20,027 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 4671 transitions. Word has length 645 [2023-11-29 00:32:20,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:32:20,028 INFO L495 AbstractCegarLoop]: Abstraction has 2651 states and 4671 transitions. [2023-11-29 00:32:20,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:32:20,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 4671 transitions. [2023-11-29 00:32:20,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2023-11-29 00:32:20,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:32:20,038 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:32:20,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:32:20,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:32:20,238 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:32:20,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:32:20,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1058029167, now seen corresponding path program 1 times [2023-11-29 00:32:20,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:32:20,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585724550] [2023-11-29 00:32:20,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:20,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:32:20,321 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:32:20,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455537895] [2023-11-29 00:32:20,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:20,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:32:20,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:32:20,323 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:32:20,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:32:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:20,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:32:20,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:32:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-29 00:32:20,717 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:32:20,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:32:20,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585724550] [2023-11-29 00:32:20,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:32:20,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455537895] [2023-11-29 00:32:20,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455537895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:32:20,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:32:20,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:32:20,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217078427] [2023-11-29 00:32:20,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:32:20,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:32:20,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:32:20,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:32:20,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:32:20,721 INFO L87 Difference]: Start difference. First operand 2651 states and 4671 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:32:20,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:32:20,916 INFO L93 Difference]: Finished difference Result 6199 states and 10782 transitions. [2023-11-29 00:32:20,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:32:20,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 645 [2023-11-29 00:32:20,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:32:20,945 INFO L225 Difference]: With dead ends: 6199 [2023-11-29 00:32:20,945 INFO L226 Difference]: Without dead ends: 3549 [2023-11-29 00:32:20,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 643 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 00:32:20,953 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 283 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1334 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:32:20,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 1334 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:32:20,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3549 states. [2023-11-29 00:32:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3549 to 3543. [2023-11-29 00:32:21,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 2714 states have (on average 1.652542372881356) internal successors, (4485), 2722 states have internal predecessors, (4485), 808 states have call successors, (808), 20 states have call predecessors, (808), 20 states have return successors, (808), 800 states have call predecessors, (808), 808 states have call successors, (808) [2023-11-29 00:32:21,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 6101 transitions. [2023-11-29 00:32:21,318 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 6101 transitions. Word has length 645 [2023-11-29 00:32:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:32:21,319 INFO L495 AbstractCegarLoop]: Abstraction has 3543 states and 6101 transitions. [2023-11-29 00:32:21,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:32:21,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 6101 transitions. [2023-11-29 00:32:21,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2023-11-29 00:32:21,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:32:21,329 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:32:21,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:32:21,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:32:21,530 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:32:21,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:32:21,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1850734735, now seen corresponding path program 1 times [2023-11-29 00:32:21,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:32:21,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907527334] [2023-11-29 00:32:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:21,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:32:21,615 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:32:21,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769821410] [2023-11-29 00:32:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:21,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:32:21,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:32:21,617 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:32:21,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:32:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:22,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 1473 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:32:22,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:32:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-29 00:32:22,108 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:32:22,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:32:22,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907527334] [2023-11-29 00:32:22,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:32:22,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769821410] [2023-11-29 00:32:22,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769821410] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:32:22,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:32:22,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:32:22,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221506244] [2023-11-29 00:32:22,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:32:22,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:32:22,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:32:22,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:32:22,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:32:22,112 INFO L87 Difference]: Start difference. First operand 3543 states and 6101 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:32:22,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:32:22,455 INFO L93 Difference]: Finished difference Result 9737 states and 16767 transitions. [2023-11-29 00:32:22,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:32:22,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 645 [2023-11-29 00:32:22,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:32:22,499 INFO L225 Difference]: With dead ends: 9737 [2023-11-29 00:32:22,499 INFO L226 Difference]: Without dead ends: 6195 [2023-11-29 00:32:22,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 643 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 00:32:22,511 INFO L413 NwaCegarLoop]: 875 mSDtfsCounter, 379 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:32:22,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 1434 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:32:22,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6195 states. [2023-11-29 00:32:23,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6195 to 6185. [2023-11-29 00:32:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6185 states, 4764 states have (on average 1.6528127623845508) internal successors, (7874), 4784 states have internal predecessors, (7874), 1380 states have call successors, (1380), 40 states have call predecessors, (1380), 40 states have return successors, (1380), 1360 states have call predecessors, (1380), 1380 states have call successors, (1380) [2023-11-29 00:32:23,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6185 states to 6185 states and 10634 transitions. [2023-11-29 00:32:23,095 INFO L78 Accepts]: Start accepts. Automaton has 6185 states and 10634 transitions. Word has length 645 [2023-11-29 00:32:23,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:32:23,096 INFO L495 AbstractCegarLoop]: Abstraction has 6185 states and 10634 transitions. [2023-11-29 00:32:23,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:32:23,097 INFO L276 IsEmpty]: Start isEmpty. Operand 6185 states and 10634 transitions. [2023-11-29 00:32:23,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2023-11-29 00:32:23,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:32:23,108 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:32:23,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 00:32:23,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 00:32:23,309 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:32:23,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:32:23,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1631880017, now seen corresponding path program 1 times [2023-11-29 00:32:23,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:32:23,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121154650] [2023-11-29 00:32:23,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:23,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:32:23,376 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:32:23,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503597793] [2023-11-29 00:32:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:23,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:32:23,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:32:23,378 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:32:23,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:32:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:23,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 1474 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:32:23,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:32:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 6720 proven. 63 refuted. 0 times theorem prover too weak. 12621 trivial. 0 not checked. [2023-11-29 00:32:24,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:32:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 231 proven. 63 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-29 00:32:24,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:32:24,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121154650] [2023-11-29 00:32:24,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:32:24,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503597793] [2023-11-29 00:32:24,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503597793] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:32:24,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:32:24,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:32:24,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886699215] [2023-11-29 00:32:24,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:32:24,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:32:24,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:32:24,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:32:24,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:32:24,458 INFO L87 Difference]: Start difference. First operand 6185 states and 10634 transitions. Second operand has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 2 states have call successors, (120), 2 states have call predecessors, (120), 4 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) [2023-11-29 00:32:25,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:32:25,436 INFO L93 Difference]: Finished difference Result 12497 states and 21387 transitions. [2023-11-29 00:32:25,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:32:25,437 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 2 states have call successors, (120), 2 states have call predecessors, (120), 4 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) Word has length 645 [2023-11-29 00:32:25,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:32:25,478 INFO L225 Difference]: With dead ends: 12497 [2023-11-29 00:32:25,478 INFO L226 Difference]: Without dead ends: 6313 [2023-11-29 00:32:25,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1292 GetRequests, 1282 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:32:25,494 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 1001 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:32:25,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1077 Valid, 1185 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:32:25,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6313 states. [2023-11-29 00:32:25,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6313 to 6189. [2023-11-29 00:32:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6189 states, 4772 states have (on average 1.6357921207041073) internal successors, (7806), 4792 states have internal predecessors, (7806), 1372 states have call successors, (1372), 44 states have call predecessors, (1372), 44 states have return successors, (1372), 1352 states have call predecessors, (1372), 1372 states have call successors, (1372) [2023-11-29 00:32:25,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6189 states to 6189 states and 10550 transitions. [2023-11-29 00:32:25,956 INFO L78 Accepts]: Start accepts. Automaton has 6189 states and 10550 transitions. Word has length 645 [2023-11-29 00:32:25,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:32:25,957 INFO L495 AbstractCegarLoop]: Abstraction has 6189 states and 10550 transitions. [2023-11-29 00:32:25,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 2 states have call successors, (120), 2 states have call predecessors, (120), 4 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) [2023-11-29 00:32:25,958 INFO L276 IsEmpty]: Start isEmpty. Operand 6189 states and 10550 transitions. [2023-11-29 00:32:25,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2023-11-29 00:32:25,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:32:25,969 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:32:25,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:32:26,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 00:32:26,170 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:32:26,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:32:26,171 INFO L85 PathProgramCache]: Analyzing trace with hash -645299241, now seen corresponding path program 1 times [2023-11-29 00:32:26,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:32:26,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997205774] [2023-11-29 00:32:26,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:26,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:32:26,254 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:32:26,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879238209] [2023-11-29 00:32:26,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:26,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:32:26,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:32:26,256 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:32:26,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:32:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:26,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 1475 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:32:26,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:32:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 7544 proven. 75 refuted. 0 times theorem prover too weak. 11785 trivial. 0 not checked. [2023-11-29 00:32:26,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:32:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 219 proven. 75 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-29 00:32:27,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:32:27,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997205774] [2023-11-29 00:32:27,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:32:27,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879238209] [2023-11-29 00:32:27,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879238209] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:32:27,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:32:27,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:32:27,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870382643] [2023-11-29 00:32:27,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:32:27,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:32:27,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:32:27,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:32:27,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:32:27,346 INFO L87 Difference]: Start difference. First operand 6189 states and 10550 transitions. Second operand has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) [2023-11-29 00:32:28,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:32:28,136 INFO L93 Difference]: Finished difference Result 12513 states and 21227 transitions. [2023-11-29 00:32:28,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:32:28,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) Word has length 645 [2023-11-29 00:32:28,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:32:28,162 INFO L225 Difference]: With dead ends: 12513 [2023-11-29 00:32:28,162 INFO L226 Difference]: Without dead ends: 6325 [2023-11-29 00:32:28,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1292 GetRequests, 1282 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 00:32:28,173 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 635 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:32:28,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [707 Valid, 1189 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:32:28,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6325 states. [2023-11-29 00:32:28,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6325 to 6221. [2023-11-29 00:32:28,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6221 states, 4796 states have (on average 1.6276063386155128) internal successors, (7806), 4816 states have internal predecessors, (7806), 1372 states have call successors, (1372), 52 states have call predecessors, (1372), 52 states have return successors, (1372), 1352 states have call predecessors, (1372), 1372 states have call successors, (1372) [2023-11-29 00:32:28,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6221 states to 6221 states and 10550 transitions. [2023-11-29 00:32:28,673 INFO L78 Accepts]: Start accepts. Automaton has 6221 states and 10550 transitions. Word has length 645 [2023-11-29 00:32:28,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:32:28,675 INFO L495 AbstractCegarLoop]: Abstraction has 6221 states and 10550 transitions. [2023-11-29 00:32:28,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) [2023-11-29 00:32:28,676 INFO L276 IsEmpty]: Start isEmpty. Operand 6221 states and 10550 transitions. [2023-11-29 00:32:28,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2023-11-29 00:32:28,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:32:28,693 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:32:28,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:32:28,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 00:32:28,894 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:32:28,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:32:28,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1462947691, now seen corresponding path program 1 times [2023-11-29 00:32:28,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:32:28,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711438265] [2023-11-29 00:32:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:28,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:32:28,988 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:32:28,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759031739] [2023-11-29 00:32:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:28,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:32:28,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:32:28,990 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:32:28,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:32:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:29,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 1474 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 00:32:29,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:32:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 7148 proven. 69 refuted. 0 times theorem prover too weak. 12187 trivial. 0 not checked. [2023-11-29 00:32:30,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:32:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-29 00:32:32,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:32:32,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711438265] [2023-11-29 00:32:32,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:32:32,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759031739] [2023-11-29 00:32:32,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759031739] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:32:32,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:32:32,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 22 [2023-11-29 00:32:32,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953659223] [2023-11-29 00:32:32,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:32:32,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 00:32:32,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:32:32,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 00:32:32,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2023-11-29 00:32:32,092 INFO L87 Difference]: Start difference. First operand 6221 states and 10550 transitions. Second operand has 11 states, 11 states have (on average 13.909090909090908) internal successors, (153), 11 states have internal predecessors, (153), 2 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 2 states have call predecessors, (99), 2 states have call successors, (99) [2023-11-29 00:32:34,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:32:34,987 INFO L93 Difference]: Finished difference Result 33570 states and 56483 transitions. [2023-11-29 00:32:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 00:32:34,988 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.909090909090908) internal successors, (153), 11 states have internal predecessors, (153), 2 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 2 states have call predecessors, (99), 2 states have call successors, (99) Word has length 645 [2023-11-29 00:32:34,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:32:35,077 INFO L225 Difference]: With dead ends: 33570 [2023-11-29 00:32:35,077 INFO L226 Difference]: Without dead ends: 27350 [2023-11-29 00:32:35,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1300 GetRequests, 1270 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2023-11-29 00:32:35,101 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 6181 mSDsluCounter, 4225 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 2069 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6181 SdHoareTripleChecker+Valid, 4822 SdHoareTripleChecker+Invalid, 2307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2069 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:32:35,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6181 Valid, 4822 Invalid, 2307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2069 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 00:32:35,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27350 states. [2023-11-29 00:32:36,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27350 to 13704. [2023-11-29 00:32:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13704 states, 10826 states have (on average 1.6209126177720303) internal successors, (17548), 10867 states have internal predecessors, (17548), 2771 states have call successors, (2771), 106 states have call predecessors, (2771), 106 states have return successors, (2771), 2730 states have call predecessors, (2771), 2771 states have call successors, (2771) [2023-11-29 00:32:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13704 states to 13704 states and 23090 transitions. [2023-11-29 00:32:36,870 INFO L78 Accepts]: Start accepts. Automaton has 13704 states and 23090 transitions. Word has length 645 [2023-11-29 00:32:36,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:32:36,871 INFO L495 AbstractCegarLoop]: Abstraction has 13704 states and 23090 transitions. [2023-11-29 00:32:36,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.909090909090908) internal successors, (153), 11 states have internal predecessors, (153), 2 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 2 states have call predecessors, (99), 2 states have call successors, (99) [2023-11-29 00:32:36,872 INFO L276 IsEmpty]: Start isEmpty. Operand 13704 states and 23090 transitions. [2023-11-29 00:32:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2023-11-29 00:32:36,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:32:36,883 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:32:36,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:32:37,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:32:37,083 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:32:37,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:32:37,084 INFO L85 PathProgramCache]: Analyzing trace with hash 837874899, now seen corresponding path program 1 times [2023-11-29 00:32:37,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:32:37,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248151333] [2023-11-29 00:32:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:37,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:32:37,154 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:32:37,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496351325] [2023-11-29 00:32:37,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:37,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:32:37,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:32:37,155 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:32:37,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:32:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:37,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 1474 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 00:32:37,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:32:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 11201 proven. 189 refuted. 0 times theorem prover too weak. 8014 trivial. 0 not checked. [2023-11-29 00:32:38,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:32:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 171 proven. 123 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-29 00:32:39,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:32:39,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248151333] [2023-11-29 00:32:39,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:32:39,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496351325] [2023-11-29 00:32:39,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496351325] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:32:39,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:32:39,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-11-29 00:32:39,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055345198] [2023-11-29 00:32:39,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:32:39,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 00:32:39,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:32:39,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 00:32:39,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:32:39,671 INFO L87 Difference]: Start difference. First operand 13704 states and 23090 transitions. Second operand has 21 states, 21 states have (on average 12.285714285714286) internal successors, (258), 21 states have internal predecessors, (258), 4 states have call successors, (140), 3 states have call predecessors, (140), 6 states have return successors, (141), 4 states have call predecessors, (141), 4 states have call successors, (141) [2023-11-29 00:32:59,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:32:59,166 INFO L93 Difference]: Finished difference Result 58335 states and 93846 transitions. [2023-11-29 00:32:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2023-11-29 00:32:59,167 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 12.285714285714286) internal successors, (258), 21 states have internal predecessors, (258), 4 states have call successors, (140), 3 states have call predecessors, (140), 6 states have return successors, (141), 4 states have call predecessors, (141), 4 states have call successors, (141) Word has length 645 [2023-11-29 00:32:59,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:32:59,355 INFO L225 Difference]: With dead ends: 58335 [2023-11-29 00:32:59,355 INFO L226 Difference]: Without dead ends: 44539 [2023-11-29 00:32:59,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1496 GetRequests, 1298 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16926 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5592, Invalid=33810, Unknown=0, NotChecked=0, Total=39402 [2023-11-29 00:32:59,411 INFO L413 NwaCegarLoop]: 761 mSDtfsCounter, 10394 mSDsluCounter, 6341 mSDsCounter, 0 mSdLazyCounter, 4690 mSolverCounterSat, 6477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10455 SdHoareTripleChecker+Valid, 7102 SdHoareTripleChecker+Invalid, 11167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6477 IncrementalHoareTripleChecker+Valid, 4690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:32:59,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10455 Valid, 7102 Invalid, 11167 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6477 Valid, 4690 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2023-11-29 00:32:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44539 states. [2023-11-29 00:33:01,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44539 to 16764. [2023-11-29 00:33:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16764 states, 13158 states have (on average 1.5829153366773066) internal successors, (20828), 13211 states have internal predecessors, (20828), 3403 states have call successors, (3403), 202 states have call predecessors, (3403), 202 states have return successors, (3403), 3350 states have call predecessors, (3403), 3403 states have call successors, (3403) [2023-11-29 00:33:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16764 states to 16764 states and 27634 transitions. [2023-11-29 00:33:01,962 INFO L78 Accepts]: Start accepts. Automaton has 16764 states and 27634 transitions. Word has length 645 [2023-11-29 00:33:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:33:01,963 INFO L495 AbstractCegarLoop]: Abstraction has 16764 states and 27634 transitions. [2023-11-29 00:33:01,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 12.285714285714286) internal successors, (258), 21 states have internal predecessors, (258), 4 states have call successors, (140), 3 states have call predecessors, (140), 6 states have return successors, (141), 4 states have call predecessors, (141), 4 states have call successors, (141) [2023-11-29 00:33:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 16764 states and 27634 transitions. [2023-11-29 00:33:01,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2023-11-29 00:33:01,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:33:01,973 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:33:01,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 00:33:02,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:33:02,174 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:33:02,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:33:02,174 INFO L85 PathProgramCache]: Analyzing trace with hash 899914513, now seen corresponding path program 1 times [2023-11-29 00:33:02,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:33:02,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977694326] [2023-11-29 00:33:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:33:02,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:33:02,242 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:33:02,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530333000] [2023-11-29 00:33:02,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:33:02,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:33:02,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:33:02,244 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:33:02,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:33:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:02,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 1475 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:33:02,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:33:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 9098 proven. 186 refuted. 0 times theorem prover too weak. 10120 trivial. 0 not checked. [2023-11-29 00:33:03,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:33:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 108 proven. 186 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-29 00:33:03,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:33:03,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977694326] [2023-11-29 00:33:03,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:33:03,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530333000] [2023-11-29 00:33:03,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530333000] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:33:03,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:33:03,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-11-29 00:33:03,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005249090] [2023-11-29 00:33:03,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:33:03,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 00:33:03,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:33:03,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 00:33:03,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:33:03,529 INFO L87 Difference]: Start difference. First operand 16764 states and 27634 transitions. Second operand has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 11 states have internal predecessors, (171), 2 states have call successors, (161), 2 states have call predecessors, (161), 4 states have return successors, (162), 2 states have call predecessors, (162), 2 states have call successors, (162) [2023-11-29 00:33:08,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:33:08,993 INFO L93 Difference]: Finished difference Result 67990 states and 111563 transitions. [2023-11-29 00:33:08,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 00:33:08,994 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 11 states have internal predecessors, (171), 2 states have call successors, (161), 2 states have call predecessors, (161), 4 states have return successors, (162), 2 states have call predecessors, (162), 2 states have call successors, (162) Word has length 645 [2023-11-29 00:33:08,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:33:09,104 INFO L225 Difference]: With dead ends: 67990 [2023-11-29 00:33:09,104 INFO L226 Difference]: Without dead ends: 51278 [2023-11-29 00:33:09,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1309 GetRequests, 1278 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=612, Unknown=0, NotChecked=0, Total=870 [2023-11-29 00:33:09,136 INFO L413 NwaCegarLoop]: 725 mSDtfsCounter, 1859 mSDsluCounter, 3211 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1918 SdHoareTripleChecker+Valid, 3936 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:33:09,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1918 Valid, 3936 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1434 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:33:09,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51278 states. [2023-11-29 00:33:12,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51278 to 38498. [2023-11-29 00:33:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38498 states, 32331 states have (on average 1.6141474126998856) internal successors, (52187), 32484 states have internal predecessors, (52187), 5783 states have call successors, (5783), 383 states have call predecessors, (5783), 383 states have return successors, (5783), 5630 states have call predecessors, (5783), 5783 states have call successors, (5783) [2023-11-29 00:33:13,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38498 states to 38498 states and 63753 transitions. [2023-11-29 00:33:13,014 INFO L78 Accepts]: Start accepts. Automaton has 38498 states and 63753 transitions. Word has length 645 [2023-11-29 00:33:13,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:33:13,014 INFO L495 AbstractCegarLoop]: Abstraction has 38498 states and 63753 transitions. [2023-11-29 00:33:13,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 11 states have internal predecessors, (171), 2 states have call successors, (161), 2 states have call predecessors, (161), 4 states have return successors, (162), 2 states have call predecessors, (162), 2 states have call successors, (162) [2023-11-29 00:33:13,015 INFO L276 IsEmpty]: Start isEmpty. Operand 38498 states and 63753 transitions. [2023-11-29 00:33:13,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2023-11-29 00:33:13,031 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:33:13,031 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:33:13,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:33:13,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:33:13,232 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:33:13,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:33:13,232 INFO L85 PathProgramCache]: Analyzing trace with hash -147257200, now seen corresponding path program 1 times [2023-11-29 00:33:13,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:33:13,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185706977] [2023-11-29 00:33:13,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:33:13,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:33:13,290 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:33:13,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806650748] [2023-11-29 00:33:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:33:13,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:33:13,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:33:13,292 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:33:13,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:33:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:13,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 1476 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:33:13,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:33:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 870 proven. 288 refuted. 0 times theorem prover too weak. 18246 trivial. 0 not checked. [2023-11-29 00:33:15,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:33:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 6 proven. 288 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-29 00:33:16,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:33:16,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185706977] [2023-11-29 00:33:16,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:33:16,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806650748] [2023-11-29 00:33:16,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806650748] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:33:16,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:33:16,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-29 00:33:16,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416587884] [2023-11-29 00:33:16,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:33:16,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 00:33:16,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:33:16,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 00:33:16,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:33:16,101 INFO L87 Difference]: Start difference. First operand 38498 states and 63753 transitions. Second operand has 11 states, 11 states have (on average 27.636363636363637) internal successors, (304), 11 states have internal predecessors, (304), 4 states have call successors, (198), 3 states have call predecessors, (198), 5 states have return successors, (198), 4 states have call predecessors, (198), 4 states have call successors, (198) [2023-11-29 00:33:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:33:25,244 INFO L93 Difference]: Finished difference Result 126054 states and 206489 transitions. [2023-11-29 00:33:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:33:25,244 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 27.636363636363637) internal successors, (304), 11 states have internal predecessors, (304), 4 states have call successors, (198), 3 states have call predecessors, (198), 5 states have return successors, (198), 4 states have call predecessors, (198), 4 states have call successors, (198) Word has length 646 [2023-11-29 00:33:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:33:25,370 INFO L225 Difference]: With dead ends: 126054 [2023-11-29 00:33:25,370 INFO L226 Difference]: Without dead ends: 87612 [2023-11-29 00:33:25,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1296 GetRequests, 1281 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:33:25,416 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 1114 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:33:25,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 1951 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:33:25,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87612 states. [2023-11-29 00:33:33,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87612 to 84222. [2023-11-29 00:33:33,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84222 states, 71278 states have (on average 1.5930581666152248) internal successors, (113550), 71743 states have internal predecessors, (113550), 11859 states have call successors, (11859), 1084 states have call predecessors, (11859), 1084 states have return successors, (11859), 11394 states have call predecessors, (11859), 11859 states have call successors, (11859) [2023-11-29 00:33:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84222 states to 84222 states and 137268 transitions. [2023-11-29 00:33:34,069 INFO L78 Accepts]: Start accepts. Automaton has 84222 states and 137268 transitions. Word has length 646 [2023-11-29 00:33:34,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:33:34,070 INFO L495 AbstractCegarLoop]: Abstraction has 84222 states and 137268 transitions. [2023-11-29 00:33:34,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 27.636363636363637) internal successors, (304), 11 states have internal predecessors, (304), 4 states have call successors, (198), 3 states have call predecessors, (198), 5 states have return successors, (198), 4 states have call predecessors, (198), 4 states have call successors, (198) [2023-11-29 00:33:34,070 INFO L276 IsEmpty]: Start isEmpty. Operand 84222 states and 137268 transitions. [2023-11-29 00:33:34,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2023-11-29 00:33:34,099 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:33:34,099 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:33:34,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:33:34,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:33:34,300 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:33:34,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:33:34,301 INFO L85 PathProgramCache]: Analyzing trace with hash -288220160, now seen corresponding path program 1 times [2023-11-29 00:33:34,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:33:34,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650611900] [2023-11-29 00:33:34,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:33:34,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:33:34,362 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:33:34,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388136142] [2023-11-29 00:33:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:33:34,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:33:34,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:33:34,364 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:33:34,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:33:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:34,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 1478 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:33:34,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:33:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 9788 proven. 141 refuted. 0 times theorem prover too weak. 9475 trivial. 0 not checked. [2023-11-29 00:33:35,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:33:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-29 00:33:35,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:33:35,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650611900] [2023-11-29 00:33:35,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:33:35,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388136142] [2023-11-29 00:33:35,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388136142] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:33:35,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:33:35,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-29 00:33:35,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071865248] [2023-11-29 00:33:35,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:33:35,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:33:35,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:33:35,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:33:35,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:33:35,370 INFO L87 Difference]: Start difference. First operand 84222 states and 137268 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:33:43,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:33:43,100 INFO L93 Difference]: Finished difference Result 166032 states and 270357 transitions. [2023-11-29 00:33:43,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:33:43,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 647 [2023-11-29 00:33:43,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:33:43,232 INFO L225 Difference]: With dead ends: 166032 [2023-11-29 00:33:43,232 INFO L226 Difference]: Without dead ends: 81870 [2023-11-29 00:33:43,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1292 GetRequests, 1287 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:33:43,308 INFO L413 NwaCegarLoop]: 536 mSDtfsCounter, 540 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:33:43,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 536 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:33:43,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81870 states. [2023-11-29 00:33:50,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81870 to 81262. [2023-11-29 00:33:50,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81262 states, 68318 states have (on average 1.5763634766825727) internal successors, (107694), 68783 states have internal predecessors, (107694), 11859 states have call successors, (11859), 1084 states have call predecessors, (11859), 1084 states have return successors, (11859), 11394 states have call predecessors, (11859), 11859 states have call successors, (11859) [2023-11-29 00:33:50,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81262 states to 81262 states and 131412 transitions. [2023-11-29 00:33:50,882 INFO L78 Accepts]: Start accepts. Automaton has 81262 states and 131412 transitions. Word has length 647 [2023-11-29 00:33:50,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:33:50,882 INFO L495 AbstractCegarLoop]: Abstraction has 81262 states and 131412 transitions. [2023-11-29 00:33:50,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:33:50,883 INFO L276 IsEmpty]: Start isEmpty. Operand 81262 states and 131412 transitions. [2023-11-29 00:33:50,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2023-11-29 00:33:50,907 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:33:50,908 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:33:50,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:33:51,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:33:51,108 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:33:51,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:33:51,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1058542320, now seen corresponding path program 1 times [2023-11-29 00:33:51,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:33:51,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249627954] [2023-11-29 00:33:51,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:33:51,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:33:51,156 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:33:51,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173463736] [2023-11-29 00:33:51,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:33:51,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:33:51,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:33:51,157 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:33:51,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:33:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:51,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 1479 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:33:51,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:33:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-29 00:33:52,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:33:52,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:33:52,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249627954] [2023-11-29 00:33:52,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:33:52,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173463736] [2023-11-29 00:33:52,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173463736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:33:52,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:33:52,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:33:52,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853122428] [2023-11-29 00:33:52,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:33:52,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:33:52,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:33:52,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:33:52,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:33:52,186 INFO L87 Difference]: Start difference. First operand 81262 states and 131412 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:34:05,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:34:05,864 INFO L93 Difference]: Finished difference Result 243666 states and 394070 transitions. [2023-11-29 00:34:05,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:34:05,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 648 [2023-11-29 00:34:05,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:34:06,116 INFO L225 Difference]: With dead ends: 243666 [2023-11-29 00:34:06,117 INFO L226 Difference]: Without dead ends: 162464 [2023-11-29 00:34:06,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 646 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 00:34:06,211 INFO L413 NwaCegarLoop]: 767 mSDtfsCounter, 275 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:34:06,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 1319 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:34:06,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162464 states. [2023-11-29 00:34:22,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162464 to 162462. [2023-11-29 00:34:22,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162462 states, 136606 states have (on average 1.5746160490754433) internal successors, (215102), 137535 states have internal predecessors, (215102), 23691 states have call successors, (23691), 2164 states have call predecessors, (23691), 2164 states have return successors, (23691), 22762 states have call predecessors, (23691), 23691 states have call successors, (23691) [2023-11-29 00:34:22,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162462 states to 162462 states and 262484 transitions. [2023-11-29 00:34:22,812 INFO L78 Accepts]: Start accepts. Automaton has 162462 states and 262484 transitions. Word has length 648 [2023-11-29 00:34:22,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:34:22,812 INFO L495 AbstractCegarLoop]: Abstraction has 162462 states and 262484 transitions. [2023-11-29 00:34:22,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:34:22,813 INFO L276 IsEmpty]: Start isEmpty. Operand 162462 states and 262484 transitions. [2023-11-29 00:34:22,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2023-11-29 00:34:22,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:34:22,837 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:34:22,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:34:23,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:34:23,038 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:34:23,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:34:23,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1586993481, now seen corresponding path program 1 times [2023-11-29 00:34:23,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:34:23,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969845994] [2023-11-29 00:34:23,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:23,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:34:23,095 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:34:23,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970021240] [2023-11-29 00:34:23,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:23,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:34:23,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:34:23,096 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:34:23,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:34:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:34:23,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 1482 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 00:34:23,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:34:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 13667 proven. 585 refuted. 0 times theorem prover too weak. 5152 trivial. 0 not checked. [2023-11-29 00:34:28,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:34:36,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:34:36,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969845994] [2023-11-29 00:34:36,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:34:36,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970021240] [2023-11-29 00:34:36,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970021240] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:34:36,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:34:36,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-29 00:34:36,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418718254] [2023-11-29 00:34:36,064 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:34:36,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:34:36,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:34:36,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:34:36,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=437, Unknown=1, NotChecked=0, Total=552 [2023-11-29 00:34:36,067 INFO L87 Difference]: Start difference. First operand 162462 states and 262484 transitions. Second operand has 18 states, 18 states have (on average 10.055555555555555) internal successors, (181), 18 states have internal predecessors, (181), 5 states have call successors, (99), 5 states have call predecessors, (99), 9 states have return successors, (99), 5 states have call predecessors, (99), 5 states have call successors, (99) [2023-11-29 00:34:41,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:34:49,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:35:00,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:35:05,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:35:11,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:35:15,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.59s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:35:19,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:35:39,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:35:43,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:35:48,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:35:50,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:35:53,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:36:02,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:36:13,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:36:18,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.33s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:37:24,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:37:59,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:37:59,253 INFO L93 Difference]: Finished difference Result 807082 states and 1285499 transitions. [2023-11-29 00:37:59,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 00:37:59,254 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.055555555555555) internal successors, (181), 18 states have internal predecessors, (181), 5 states have call successors, (99), 5 states have call predecessors, (99), 9 states have return successors, (99), 5 states have call predecessors, (99), 5 states have call successors, (99) Word has length 649 [2023-11-29 00:37:59,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:38:00,624 INFO L225 Difference]: With dead ends: 807082 [2023-11-29 00:38:00,625 INFO L226 Difference]: Without dead ends: 644680 [2023-11-29 00:38:00,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1117 GetRequests, 1054 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=962, Invalid=3195, Unknown=3, NotChecked=0, Total=4160 [2023-11-29 00:38:00,823 INFO L413 NwaCegarLoop]: 595 mSDtfsCounter, 3327 mSDsluCounter, 2700 mSDsCounter, 0 mSdLazyCounter, 2802 mSolverCounterSat, 532 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 114.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3365 SdHoareTripleChecker+Valid, 3295 SdHoareTripleChecker+Invalid, 3339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 2802 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 115.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:38:00,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3365 Valid, 3295 Invalid, 3339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 2802 Invalid, 5 Unknown, 0 Unchecked, 115.4s Time] [2023-11-29 00:38:01,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644680 states. [2023-11-29 00:38:46,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644680 to 464670. [2023-11-29 00:38:46,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464670 states, 415582 states have (on average 1.597138470867362) internal successors, (663742), 418815 states have internal predecessors, (663742), 43051 states have call successors, (43051), 6036 states have call predecessors, (43051), 6036 states have return successors, (43051), 39818 states have call predecessors, (43051), 43051 states have call successors, (43051) [2023-11-29 00:38:48,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464670 states to 464670 states and 749844 transitions. [2023-11-29 00:38:48,373 INFO L78 Accepts]: Start accepts. Automaton has 464670 states and 749844 transitions. Word has length 649 [2023-11-29 00:38:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:38:48,374 INFO L495 AbstractCegarLoop]: Abstraction has 464670 states and 749844 transitions. [2023-11-29 00:38:48,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.055555555555555) internal successors, (181), 18 states have internal predecessors, (181), 5 states have call successors, (99), 5 states have call predecessors, (99), 9 states have return successors, (99), 5 states have call predecessors, (99), 5 states have call successors, (99) [2023-11-29 00:38:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 464670 states and 749844 transitions. [2023-11-29 00:38:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2023-11-29 00:38:48,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:38:48,474 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:38:48,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:38:48,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:38:48,674 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:38:48,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:38:48,675 INFO L85 PathProgramCache]: Analyzing trace with hash -693507143, now seen corresponding path program 1 times [2023-11-29 00:38:48,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:38:48,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308371353] [2023-11-29 00:38:48,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:38:48,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:38:48,726 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:38:48,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624478633] [2023-11-29 00:38:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:38:48,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:38:48,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:38:48,728 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:38:48,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:38:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:49,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:38:49,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:38:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-29 00:38:49,154 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:38:49,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:38:49,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308371353] [2023-11-29 00:38:49,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:38:49,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624478633] [2023-11-29 00:38:49,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624478633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:38:49,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:38:49,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:38:49,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651173806] [2023-11-29 00:38:49,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:38:49,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:38:49,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:38:49,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:38:49,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:38:49,157 INFO L87 Difference]: Start difference. First operand 464670 states and 749844 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:39:58,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:39:58,147 INFO L93 Difference]: Finished difference Result 1310502 states and 2116191 transitions. [2023-11-29 00:39:58,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:39:58,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 649 [2023-11-29 00:39:58,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:39:59,700 INFO L225 Difference]: With dead ends: 1310502 [2023-11-29 00:39:59,700 INFO L226 Difference]: Without dead ends: 845892 [2023-11-29 00:40:00,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 647 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 00:40:00,214 INFO L413 NwaCegarLoop]: 1071 mSDtfsCounter, 544 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:40:00,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 1609 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:40:00,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845892 states. [2023-11-29 00:40:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845892 to 534738. [2023-11-29 00:40:55,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534738 states, 477234 states have (on average 1.5336753039389481) internal successors, (731922), 481011 states have internal predecessors, (731922), 50563 states have call successors, (50563), 6940 states have call predecessors, (50563), 6940 states have return successors, (50563), 46786 states have call predecessors, (50563), 50563 states have call successors, (50563) [2023-11-29 00:40:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534738 states to 534738 states and 833048 transitions. [2023-11-29 00:40:56,838 INFO L78 Accepts]: Start accepts. Automaton has 534738 states and 833048 transitions. Word has length 649 [2023-11-29 00:40:56,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:40:56,838 INFO L495 AbstractCegarLoop]: Abstraction has 534738 states and 833048 transitions. [2023-11-29 00:40:56,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-29 00:40:56,839 INFO L276 IsEmpty]: Start isEmpty. Operand 534738 states and 833048 transitions. [2023-11-29 00:40:56,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2023-11-29 00:40:56,944 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:40:56,944 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:56,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:40:57,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:40:57,145 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:40:57,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:57,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1120589325, now seen corresponding path program 1 times [2023-11-29 00:40:57,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:57,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126507753] [2023-11-29 00:40:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:57,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:57,194 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:40:57,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331455333] [2023-11-29 00:40:57,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:57,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:57,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:57,196 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:57,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:40:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:57,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 1482 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:40:57,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 9746 proven. 318 refuted. 0 times theorem prover too weak. 9340 trivial. 0 not checked. [2023-11-29 00:40:59,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:41:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 264 proven. 321 refuted. 0 times theorem prover too weak. 18819 trivial. 0 not checked. [2023-11-29 00:41:00,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:00,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126507753] [2023-11-29 00:41:00,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:41:00,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331455333] [2023-11-29 00:41:00,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331455333] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:41:00,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:41:00,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-29 00:41:00,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076676424] [2023-11-29 00:41:00,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:41:00,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:41:00,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:00,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:41:00,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:41:00,158 INFO L87 Difference]: Start difference. First operand 534738 states and 833048 transitions. Second operand has 16 states, 15 states have (on average 16.133333333333333) internal successors, (242), 14 states have internal predecessors, (242), 6 states have call successors, (198), 4 states have call predecessors, (198), 7 states have return successors, (198), 6 states have call predecessors, (198), 6 states have call successors, (198) [2023-11-29 00:41:55,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:41:55,742 INFO L93 Difference]: Finished difference Result 1076618 states and 1672703 transitions. [2023-11-29 00:41:55,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:41:55,742 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 16.133333333333333) internal successors, (242), 14 states have internal predecessors, (242), 6 states have call successors, (198), 4 states have call predecessors, (198), 7 states have return successors, (198), 6 states have call predecessors, (198), 6 states have call successors, (198) Word has length 650 [2023-11-29 00:41:55,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:41:56,770 INFO L225 Difference]: With dead ends: 1076618 [2023-11-29 00:41:56,770 INFO L226 Difference]: Without dead ends: 541940 [2023-11-29 00:41:57,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1303 GetRequests, 1284 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:41:57,110 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 690 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:41:57,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 1093 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:41:57,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541940 states. [2023-11-29 00:42:52,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541940 to 536786. [2023-11-29 00:42:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536786 states, 478770 states have (on average 1.5315621279528793) internal successors, (733266), 482547 states have internal predecessors, (733266), 50563 states have call successors, (50563), 7452 states have call predecessors, (50563), 7452 states have return successors, (50563), 46786 states have call predecessors, (50563), 50563 states have call successors, (50563) [2023-11-29 00:42:54,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536786 states to 536786 states and 834392 transitions. [2023-11-29 00:42:54,340 INFO L78 Accepts]: Start accepts. Automaton has 536786 states and 834392 transitions. Word has length 650 [2023-11-29 00:42:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:54,341 INFO L495 AbstractCegarLoop]: Abstraction has 536786 states and 834392 transitions. [2023-11-29 00:42:54,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 16.133333333333333) internal successors, (242), 14 states have internal predecessors, (242), 6 states have call successors, (198), 4 states have call predecessors, (198), 7 states have return successors, (198), 6 states have call predecessors, (198), 6 states have call successors, (198) [2023-11-29 00:42:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 536786 states and 834392 transitions. [2023-11-29 00:42:54,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2023-11-29 00:42:54,448 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:54,448 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:42:54,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:42:54,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:42:54,649 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:54,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:54,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1656975669, now seen corresponding path program 1 times [2023-11-29 00:42:54,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:54,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274297602] [2023-11-29 00:42:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:54,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:54,700 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:42:54,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626702242] [2023-11-29 00:42:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:54,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:54,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:54,702 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:54,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b297790c-c240-4a7e-a35e-c3a4e842e495/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:42:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:55,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 1485 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:42:55,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 10733 proven. 297 refuted. 0 times theorem prover too weak. 8374 trivial. 0 not checked. [2023-11-29 00:42:57,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 285 proven. 300 refuted. 0 times theorem prover too weak. 18819 trivial. 0 not checked. [2023-11-29 00:42:59,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:59,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274297602] [2023-11-29 00:42:59,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:42:59,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626702242] [2023-11-29 00:42:59,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626702242] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:59,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:42:59,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2023-11-29 00:42:59,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097971] [2023-11-29 00:42:59,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:59,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 00:42:59,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:59,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 00:42:59,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2023-11-29 00:42:59,451 INFO L87 Difference]: Start difference. First operand 536786 states and 834392 transitions. Second operand has 20 states, 20 states have (on average 14.75) internal successors, (295), 20 states have internal predecessors, (295), 6 states have call successors, (198), 4 states have call predecessors, (198), 8 states have return successors, (198), 6 states have call predecessors, (198), 6 states have call successors, (198)