./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-68.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_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/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_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-68.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/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_f4455baa-8e47-4160-9177-4a0e966748a7/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 6356f25af9bb924bb9550dc7ee13ccad0d46305c0140f2958a98a1290334276d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:16:29,592 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:16:29,655 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:16:29,659 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:16:29,660 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:16:29,682 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:16:29,683 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:16:29,683 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:16:29,684 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:16:29,684 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:16:29,685 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:16:29,686 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:16:29,686 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:16:29,687 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:16:29,687 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:16:29,688 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:16:29,689 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:16:29,689 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:16:29,690 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:16:29,690 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:16:29,690 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:16:29,691 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:16:29,692 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:16:29,692 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:16:29,692 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:16:29,693 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:16:29,693 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:16:29,694 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:16:29,694 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:16:29,695 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:16:29,695 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:16:29,695 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:16:29,696 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:16:29,696 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:16:29,696 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:16:29,696 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:16:29,697 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:16:29,697 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:16:29,697 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:16:29,697 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:16:29,698 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:16:29,698 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:16:29,698 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_f4455baa-8e47-4160-9177-4a0e966748a7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6356f25af9bb924bb9550dc7ee13ccad0d46305c0140f2958a98a1290334276d [2023-11-29 02:16:29,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:16:29,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:16:29,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:16:29,967 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:16:29,967 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:16:29,969 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-68.i [2023-11-29 02:16:32,655 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:16:32,927 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:16:32,927 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-68.i [2023-11-29 02:16:32,942 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/data/8448f7776/26d50230b04243ba8975cec972cddb67/FLAGc953b4744 [2023-11-29 02:16:33,211 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/data/8448f7776/26d50230b04243ba8975cec972cddb67 [2023-11-29 02:16:33,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:16:33,216 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:16:33,217 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:16:33,217 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:16:33,222 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:16:33,223 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:16:33" (1/1) ... [2023-11-29 02:16:33,224 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc52b22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:16:33, skipping insertion in model container [2023-11-29 02:16:33,224 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:16:33" (1/1) ... [2023-11-29 02:16:33,275 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:16:33,411 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_f4455baa-8e47-4160-9177-4a0e966748a7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-68.i[916,929] [2023-11-29 02:16:33,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:16:33,595 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:16:33,608 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_f4455baa-8e47-4160-9177-4a0e966748a7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-68.i[916,929] [2023-11-29 02:16:33,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:16:33,701 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:16:33,702 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:16:33 WrapperNode [2023-11-29 02:16:33,702 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:16:33,703 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:16:33,703 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:16:33,703 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:16:33,710 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:16:33" (1/1) ... [2023-11-29 02:16:33,734 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:16:33" (1/1) ... [2023-11-29 02:16:33,827 INFO L138 Inliner]: procedures = 26, calls = 112, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 837 [2023-11-29 02:16:33,828 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:16:33,828 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:16:33,829 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:16:33,829 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:16:33,841 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:16:33" (1/1) ... [2023-11-29 02:16:33,841 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:16:33" (1/1) ... [2023-11-29 02:16:33,858 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:16:33" (1/1) ... [2023-11-29 02:16:33,943 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 02:16:33,943 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:16:33" (1/1) ... [2023-11-29 02:16:33,943 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:16:33" (1/1) ... [2023-11-29 02:16:33,972 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:16:33" (1/1) ... [2023-11-29 02:16:33,981 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:16:33" (1/1) ... [2023-11-29 02:16:33,997 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:16:33" (1/1) ... [2023-11-29 02:16:34,002 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:16:33" (1/1) ... [2023-11-29 02:16:34,020 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:16:34,021 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:16:34,022 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:16:34,022 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:16:34,023 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:16:33" (1/1) ... [2023-11-29 02:16:34,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:16:34,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:16:34,052 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:16:34,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:16:34,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:16:34,088 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 02:16:34,088 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 02:16:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:16:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:16:34,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:16:34,243 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:16:34,246 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:16:35,251 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:16:35,312 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:16:35,313 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 02:16:35,313 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:16:35 BoogieIcfgContainer [2023-11-29 02:16:35,313 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:16:35,315 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:16:35,316 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:16:35,318 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:16:35,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:16:33" (1/3) ... [2023-11-29 02:16:35,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2beef356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:16:35, skipping insertion in model container [2023-11-29 02:16:35,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:16:33" (2/3) ... [2023-11-29 02:16:35,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2beef356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:16:35, skipping insertion in model container [2023-11-29 02:16:35,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:16:35" (3/3) ... [2023-11-29 02:16:35,321 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-68.i [2023-11-29 02:16:35,339 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:16:35,339 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:16:35,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:16:35,403 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;@357c07bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:16:35,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:16:35,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 312 states, 210 states have (on average 1.6523809523809523) internal successors, (347), 211 states have internal predecessors, (347), 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 02:16:35,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2023-11-29 02:16:35,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:16:35,452 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] [2023-11-29 02:16:35,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:16:35,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:16:35,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1785907040, now seen corresponding path program 1 times [2023-11-29 02:16:35,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:16:35,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91202729] [2023-11-29 02:16:35,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:35,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:16:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:35,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:16:35,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91202729] [2023-11-29 02:16:35,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 02:16:35,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682185181] [2023-11-29 02:16:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:35,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:35,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:16:35,832 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:16:35,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:16:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:36,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 1498 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 02:16:36,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:16:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 19208 trivial. 0 not checked. [2023-11-29 02:16:36,392 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:16:36,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682185181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:16:36,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:16:36,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:16:36,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202562405] [2023-11-29 02:16:36,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:16:36,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 02:16:36,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:16:36,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 02:16:36,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:16:36,437 INFO L87 Difference]: Start difference. First operand has 312 states, 210 states have (on average 1.6523809523809523) internal successors, (347), 211 states have internal predecessors, (347), 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 74.0) internal successors, (148), 2 states have internal predecessors, (148), 2 states have call successors, (99), 2 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 2 states have call successors, (99) [2023-11-29 02:16:36,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:16:36,528 INFO L93 Difference]: Finished difference Result 621 states and 1187 transitions. [2023-11-29 02:16:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 02:16:36,531 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 2 states have call successors, (99), 2 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 2 states have call successors, (99) Word has length 638 [2023-11-29 02:16:36,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:16:36,543 INFO L225 Difference]: With dead ends: 621 [2023-11-29 02:16:36,544 INFO L226 Difference]: Without dead ends: 310 [2023-11-29 02:16:36,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 637 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:16:36,554 INFO L413 NwaCegarLoop]: 533 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, 533 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:16:36,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 533 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:16:36,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2023-11-29 02:16:36,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2023-11-29 02:16:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 209 states have (on average 1.6172248803827751) internal successors, (338), 209 states have internal predecessors, (338), 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 02:16:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 536 transitions. [2023-11-29 02:16:36,644 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 536 transitions. Word has length 638 [2023-11-29 02:16:36,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:16:36,645 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 536 transitions. [2023-11-29 02:16:36,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 2 states have call successors, (99), 2 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 2 states have call successors, (99) [2023-11-29 02:16:36,646 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 536 transitions. [2023-11-29 02:16:36,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2023-11-29 02:16:36,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:16:36,667 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] [2023-11-29 02:16:36,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:16:36,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 02:16:36,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:16:36,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:16:36,870 INFO L85 PathProgramCache]: Analyzing trace with hash -510997718, now seen corresponding path program 1 times [2023-11-29 02:16:36,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:16:36,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941731731] [2023-11-29 02:16:36,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:36,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:16:36,984 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:16:36,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900542578] [2023-11-29 02:16:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:36,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:36,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:16:36,986 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:16:36,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:16:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:37,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 1498 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:16:37,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:16:37,550 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 02:16:37,550 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:16:37,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:16:37,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941731731] [2023-11-29 02:16:37,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:16:37,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900542578] [2023-11-29 02:16:37,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900542578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:16:37,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:16:37,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:16:37,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721320456] [2023-11-29 02:16:37,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:16:37,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:16:37,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:16:37,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:16:37,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:16:37,557 INFO L87 Difference]: Start difference. First operand 310 states and 536 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 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 02:16:37,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:16:37,646 INFO L93 Difference]: Finished difference Result 619 states and 1071 transitions. [2023-11-29 02:16:37,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:16:37,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 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 638 [2023-11-29 02:16:37,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:16:37,654 INFO L225 Difference]: With dead ends: 619 [2023-11-29 02:16:37,655 INFO L226 Difference]: Without dead ends: 310 [2023-11-29 02:16:37,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 635 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:16:37,657 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 538 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:16:37,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1040 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:16:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2023-11-29 02:16:37,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2023-11-29 02:16:37,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 209 states have (on average 1.61244019138756) internal successors, (337), 209 states have internal predecessors, (337), 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 02:16:37,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 535 transitions. [2023-11-29 02:16:37,703 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 535 transitions. Word has length 638 [2023-11-29 02:16:37,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:16:37,707 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 535 transitions. [2023-11-29 02:16:37,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 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 02:16:37,708 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 535 transitions. [2023-11-29 02:16:37,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2023-11-29 02:16:37,715 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:16:37,715 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] [2023-11-29 02:16:37,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:16:37,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:37,916 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:16:37,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:16:37,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1509669522, now seen corresponding path program 1 times [2023-11-29 02:16:37,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:16:37,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068754347] [2023-11-29 02:16:37,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:37,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:16:38,010 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:16:38,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796283929] [2023-11-29 02:16:38,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:38,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:38,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:16:38,012 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:16:38,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:16:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:38,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:16:38,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:16:38,635 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 02:16:38,635 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:16:38,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:16:38,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068754347] [2023-11-29 02:16:38,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:16:38,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796283929] [2023-11-29 02:16:38,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796283929] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:16:38,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:16:38,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:16:38,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770507874] [2023-11-29 02:16:38,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:16:38,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:16:38,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:16:38,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:16:38,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:16:38,640 INFO L87 Difference]: Start difference. First operand 310 states and 535 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 02:16:38,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:16:38,721 INFO L93 Difference]: Finished difference Result 906 states and 1560 transitions. [2023-11-29 02:16:38,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:16:38,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 639 [2023-11-29 02:16:38,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:16:38,730 INFO L225 Difference]: With dead ends: 906 [2023-11-29 02:16:38,730 INFO L226 Difference]: Without dead ends: 597 [2023-11-29 02:16:38,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 637 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:16:38,732 INFO L413 NwaCegarLoop]: 853 mSDtfsCounter, 449 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:16:38,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 1378 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:16:38,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2023-11-29 02:16:38,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 375. [2023-11-29 02:16:38,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 274 states have (on average 1.6751824817518248) internal successors, (459), 274 states have internal predecessors, (459), 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 02:16:38,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 657 transitions. [2023-11-29 02:16:38,789 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 657 transitions. Word has length 639 [2023-11-29 02:16:38,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:16:38,791 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 657 transitions. [2023-11-29 02:16:38,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 02:16:38,792 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 657 transitions. [2023-11-29 02:16:38,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2023-11-29 02:16:38,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:16:38,798 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] [2023-11-29 02:16:38,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:16:38,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:38,999 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:16:39,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:16:39,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1290814804, now seen corresponding path program 1 times [2023-11-29 02:16:39,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:16:39,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41575845] [2023-11-29 02:16:39,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:39,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:16:39,085 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:16:39,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175542528] [2023-11-29 02:16:39,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:39,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:39,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:16:39,087 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:16:39,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:16:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:39,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 1500 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:16:39,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:16:39,608 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 02:16:39,608 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:16:39,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:16:39,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41575845] [2023-11-29 02:16:39,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:16:39,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175542528] [2023-11-29 02:16:39,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175542528] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:16:39,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:16:39,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:16:39,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89153512] [2023-11-29 02:16:39,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:16:39,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:16:39,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:16:39,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:16:39,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:16:39,613 INFO L87 Difference]: Start difference. First operand 375 states and 657 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 02:16:39,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:16:39,692 INFO L93 Difference]: Finished difference Result 1002 states and 1758 transitions. [2023-11-29 02:16:39,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:16:39,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 639 [2023-11-29 02:16:39,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:16:39,699 INFO L225 Difference]: With dead ends: 1002 [2023-11-29 02:16:39,699 INFO L226 Difference]: Without dead ends: 628 [2023-11-29 02:16:39,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 637 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:16:39,702 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 313 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:16:39,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 1148 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:16:39,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2023-11-29 02:16:39,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 625. [2023-11-29 02:16:39,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 481 states have (on average 1.6964656964656966) internal successors, (816), 482 states have internal predecessors, (816), 141 states have call successors, (141), 2 states have call predecessors, (141), 2 states have return successors, (141), 140 states have call predecessors, (141), 141 states have call successors, (141) [2023-11-29 02:16:39,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1098 transitions. [2023-11-29 02:16:39,771 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1098 transitions. Word has length 639 [2023-11-29 02:16:39,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:16:39,773 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 1098 transitions. [2023-11-29 02:16:39,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 02:16:39,773 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1098 transitions. [2023-11-29 02:16:39,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2023-11-29 02:16:39,780 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:16:39,781 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] [2023-11-29 02:16:39,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:16:39,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:39,982 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:16:39,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:16:39,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1093109934, now seen corresponding path program 1 times [2023-11-29 02:16:39,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:16:39,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955325282] [2023-11-29 02:16:39,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:39,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:16:40,056 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:16:40,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620485838] [2023-11-29 02:16:40,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:40,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:40,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:16:40,058 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:16:40,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:16:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:40,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:16:40,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:16:41,237 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 02:16:41,237 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:16:41,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:16:41,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955325282] [2023-11-29 02:16:41,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:16:41,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620485838] [2023-11-29 02:16:41,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620485838] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:16:41,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:16:41,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:16:41,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280793599] [2023-11-29 02:16:41,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:16:41,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:16:41,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:16:41,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:16:41,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:16:41,242 INFO L87 Difference]: Start difference. First operand 625 states and 1098 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 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 02:16:41,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:16:41,714 INFO L93 Difference]: Finished difference Result 2495 states and 4385 transitions. [2023-11-29 02:16:41,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:16:41,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 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 639 [2023-11-29 02:16:41,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:16:41,727 INFO L225 Difference]: With dead ends: 2495 [2023-11-29 02:16:41,727 INFO L226 Difference]: Without dead ends: 1871 [2023-11-29 02:16:41,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 636 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:16:41,730 INFO L413 NwaCegarLoop]: 782 mSDtfsCounter, 766 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 1760 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:16:41,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [766 Valid, 1760 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:16:41,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2023-11-29 02:16:41,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1859. [2023-11-29 02:16:41,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1429 states have (on average 1.688593421973408) internal successors, (2413), 1432 states have internal predecessors, (2413), 423 states have call successors, (423), 6 states have call predecessors, (423), 6 states have return successors, (423), 420 states have call predecessors, (423), 423 states have call successors, (423) [2023-11-29 02:16:41,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 3259 transitions. [2023-11-29 02:16:41,861 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 3259 transitions. Word has length 639 [2023-11-29 02:16:41,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:16:41,862 INFO L495 AbstractCegarLoop]: Abstraction has 1859 states and 3259 transitions. [2023-11-29 02:16:41,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 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 02:16:41,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 3259 transitions. [2023-11-29 02:16:41,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2023-11-29 02:16:41,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:16:41,869 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] [2023-11-29 02:16:41,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 02:16:42,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:42,069 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:16:42,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:16:42,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1295197127, now seen corresponding path program 1 times [2023-11-29 02:16:42,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:16:42,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170337588] [2023-11-29 02:16:42,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:42,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:16:42,140 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:16:42,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495647712] [2023-11-29 02:16:42,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:42,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:42,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:16:42,142 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:16:42,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:16:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:42,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 1502 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 02:16:42,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:16:44,180 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 02:16:44,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:16:44,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:16:44,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170337588] [2023-11-29 02:16:44,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:16:44,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495647712] [2023-11-29 02:16:44,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495647712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:16:44,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:16:44,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:16:44,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34232348] [2023-11-29 02:16:44,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:16:44,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:16:44,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:16:44,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:16:44,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:16:44,185 INFO L87 Difference]: Start difference. First operand 1859 states and 3259 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 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 02:16:44,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:16:44,664 INFO L93 Difference]: Finished difference Result 5685 states and 9926 transitions. [2023-11-29 02:16:44,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:16:44,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 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 640 [2023-11-29 02:16:44,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:16:44,686 INFO L225 Difference]: With dead ends: 5685 [2023-11-29 02:16:44,687 INFO L226 Difference]: Without dead ends: 3827 [2023-11-29 02:16:44,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 637 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:16:44,692 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 566 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:16:44,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 1578 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:16:44,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2023-11-29 02:16:45,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 3697. [2023-11-29 02:16:45,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3697 states, 2838 states have (on average 1.6807610993657505) internal successors, (4770), 2844 states have internal predecessors, (4770), 846 states have call successors, (846), 12 states have call predecessors, (846), 12 states have return successors, (846), 840 states have call predecessors, (846), 846 states have call successors, (846) [2023-11-29 02:16:45,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3697 states to 3697 states and 6462 transitions. [2023-11-29 02:16:45,073 INFO L78 Accepts]: Start accepts. Automaton has 3697 states and 6462 transitions. Word has length 640 [2023-11-29 02:16:45,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:16:45,074 INFO L495 AbstractCegarLoop]: Abstraction has 3697 states and 6462 transitions. [2023-11-29 02:16:45,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 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 02:16:45,074 INFO L276 IsEmpty]: Start isEmpty. Operand 3697 states and 6462 transitions. [2023-11-29 02:16:45,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2023-11-29 02:16:45,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:16:45,082 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] [2023-11-29 02:16:45,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:16:45,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 02:16:45,282 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:16:45,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:16:45,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1317829381, now seen corresponding path program 1 times [2023-11-29 02:16:45,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:16:45,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280716757] [2023-11-29 02:16:45,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:45,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:16:45,354 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:16:45,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887027376] [2023-11-29 02:16:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:45,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:45,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:16:45,356 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:16:45,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:16:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:45,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 1503 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:16:45,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:16:47,215 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 02:16:47,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:16:47,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:16:47,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280716757] [2023-11-29 02:16:47,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:16:47,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887027376] [2023-11-29 02:16:47,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887027376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:16:47,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:16:47,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:16:47,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839572805] [2023-11-29 02:16:47,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:16:47,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:16:47,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:16:47,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:16:47,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:16:47,219 INFO L87 Difference]: Start difference. First operand 3697 states and 6462 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 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 02:16:47,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:16:47,924 INFO L93 Difference]: Finished difference Result 12947 states and 22642 transitions. [2023-11-29 02:16:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:16:47,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 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 640 [2023-11-29 02:16:47,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:16:47,973 INFO L225 Difference]: With dead ends: 12947 [2023-11-29 02:16:47,973 INFO L226 Difference]: Without dead ends: 9251 [2023-11-29 02:16:47,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 637 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:16:47,983 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 740 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:16:47,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 1479 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:16:47,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9251 states. [2023-11-29 02:16:48,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9251 to 9238. [2023-11-29 02:16:48,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9238 states, 7092 states have (on average 1.6759729272419628) internal successors, (11886), 7107 states have internal predecessors, (11886), 2115 states have call successors, (2115), 30 states have call predecessors, (2115), 30 states have return successors, (2115), 2100 states have call predecessors, (2115), 2115 states have call successors, (2115) [2023-11-29 02:16:48,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9238 states to 9238 states and 16116 transitions. [2023-11-29 02:16:48,914 INFO L78 Accepts]: Start accepts. Automaton has 9238 states and 16116 transitions. Word has length 640 [2023-11-29 02:16:48,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:16:48,915 INFO L495 AbstractCegarLoop]: Abstraction has 9238 states and 16116 transitions. [2023-11-29 02:16:48,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 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 02:16:48,915 INFO L276 IsEmpty]: Start isEmpty. Operand 9238 states and 16116 transitions. [2023-11-29 02:16:48,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2023-11-29 02:16:48,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:16:48,929 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] [2023-11-29 02:16:48,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 02:16:49,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 02:16:49,129 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:16:49,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:16:49,130 INFO L85 PathProgramCache]: Analyzing trace with hash -487608953, now seen corresponding path program 1 times [2023-11-29 02:16:49,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:16:49,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871299003] [2023-11-29 02:16:49,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:49,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:16:49,195 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:16:49,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499440160] [2023-11-29 02:16:49,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:49,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:49,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:16:49,196 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:16:49,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:16:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:49,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 1504 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:16:49,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:16:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 9458 proven. 174 refuted. 0 times theorem prover too weak. 9772 trivial. 0 not checked. [2023-11-29 02:16:50,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:16:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 120 proven. 174 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-29 02:16:50,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:16:50,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871299003] [2023-11-29 02:16:50,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:16:50,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499440160] [2023-11-29 02:16:50,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499440160] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:16:50,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:16:50,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 02:16:50,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167313401] [2023-11-29 02:16:50,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:16:50,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:16:50,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:16:50,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:16:50,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:16:50,579 INFO L87 Difference]: Start difference. First operand 9238 states and 16116 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (157), 2 states have call predecessors, (157), 4 states have return successors, (158), 2 states have call predecessors, (158), 2 states have call successors, (158) [2023-11-29 02:16:51,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:16:51,667 INFO L93 Difference]: Finished difference Result 18720 states and 32486 transitions. [2023-11-29 02:16:51,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:16:51,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (157), 2 states have call predecessors, (157), 4 states have return successors, (158), 2 states have call predecessors, (158), 2 states have call successors, (158) Word has length 640 [2023-11-29 02:16:51,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:16:51,729 INFO L225 Difference]: With dead ends: 18720 [2023-11-29 02:16:51,729 INFO L226 Difference]: Without dead ends: 9483 [2023-11-29 02:16:51,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1282 GetRequests, 1272 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:16:51,753 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 584 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:16:51,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 1187 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:16:51,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9483 states. [2023-11-29 02:16:53,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9483 to 9420. [2023-11-29 02:16:53,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9420 states, 7204 states have (on average 1.6488062187673516) internal successors, (11878), 7220 states have internal predecessors, (11878), 2155 states have call successors, (2155), 60 states have call predecessors, (2155), 60 states have return successors, (2155), 2139 states have call predecessors, (2155), 2155 states have call successors, (2155) [2023-11-29 02:16:53,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9420 states to 9420 states and 16188 transitions. [2023-11-29 02:16:53,120 INFO L78 Accepts]: Start accepts. Automaton has 9420 states and 16188 transitions. Word has length 640 [2023-11-29 02:16:53,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:16:53,122 INFO L495 AbstractCegarLoop]: Abstraction has 9420 states and 16188 transitions. [2023-11-29 02:16:53,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (157), 2 states have call predecessors, (157), 4 states have return successors, (158), 2 states have call predecessors, (158), 2 states have call successors, (158) [2023-11-29 02:16:53,122 INFO L276 IsEmpty]: Start isEmpty. Operand 9420 states and 16188 transitions. [2023-11-29 02:16:53,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2023-11-29 02:16:53,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:16:53,142 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] [2023-11-29 02:16:53,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:16:53,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:53,343 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:16:53,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:16:53,344 INFO L85 PathProgramCache]: Analyzing trace with hash -451255097, now seen corresponding path program 1 times [2023-11-29 02:16:53,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:16:53,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384557644] [2023-11-29 02:16:53,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:53,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:16:53,416 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:16:53,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944029963] [2023-11-29 02:16:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:53,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:53,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:16:53,418 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:16:53,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:16:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:53,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 1506 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:16:53,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:16:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 9590 proven. 168 refuted. 0 times theorem prover too weak. 9646 trivial. 0 not checked. [2023-11-29 02:16:54,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:16:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 126 proven. 168 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-29 02:16:54,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:16:54,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384557644] [2023-11-29 02:16:54,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:16:54,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944029963] [2023-11-29 02:16:54,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944029963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:16:54,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:16:54,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 02:16:54,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147644978] [2023-11-29 02:16:54,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:16:54,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:16:54,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:16:54,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:16:54,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:16:54,505 INFO L87 Difference]: Start difference. First operand 9420 states and 16188 transitions. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 2 states have call successors, (155), 2 states have call predecessors, (155), 4 states have return successors, (156), 2 states have call predecessors, (156), 2 states have call successors, (156) [2023-11-29 02:16:55,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:16:55,179 INFO L93 Difference]: Finished difference Result 15187 states and 25933 transitions. [2023-11-29 02:16:55,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:16:55,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 2 states have call successors, (155), 2 states have call predecessors, (155), 4 states have return successors, (156), 2 states have call predecessors, (156), 2 states have call successors, (156) Word has length 641 [2023-11-29 02:16:55,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:16:55,196 INFO L225 Difference]: With dead ends: 15187 [2023-11-29 02:16:55,196 INFO L226 Difference]: Without dead ends: 5830 [2023-11-29 02:16:55,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1284 GetRequests, 1274 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:16:55,220 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 612 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:16:55,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 1062 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:16:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5830 states. [2023-11-29 02:16:55,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5830 to 5768. [2023-11-29 02:16:55,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5768 states, 4182 states have (on average 1.6071257771401244) internal successors, (6721), 4183 states have internal predecessors, (6721), 1525 states have call successors, (1525), 60 states have call predecessors, (1525), 60 states have return successors, (1525), 1524 states have call predecessors, (1525), 1525 states have call successors, (1525) [2023-11-29 02:16:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5768 states to 5768 states and 9771 transitions. [2023-11-29 02:16:55,746 INFO L78 Accepts]: Start accepts. Automaton has 5768 states and 9771 transitions. Word has length 641 [2023-11-29 02:16:55,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:16:55,747 INFO L495 AbstractCegarLoop]: Abstraction has 5768 states and 9771 transitions. [2023-11-29 02:16:55,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 2 states have call successors, (155), 2 states have call predecessors, (155), 4 states have return successors, (156), 2 states have call predecessors, (156), 2 states have call successors, (156) [2023-11-29 02:16:55,747 INFO L276 IsEmpty]: Start isEmpty. Operand 5768 states and 9771 transitions. [2023-11-29 02:16:55,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2023-11-29 02:16:55,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:16:55,757 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] [2023-11-29 02:16:55,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:16:55,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:55,957 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:16:55,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:16:55,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1240829297, now seen corresponding path program 1 times [2023-11-29 02:16:55,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:16:55,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274721971] [2023-11-29 02:16:55,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:55,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:16:56,030 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:16:56,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369379651] [2023-11-29 02:16:56,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:56,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:56,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:16:56,031 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:16:56,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:16:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:56,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 1506 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:16:56,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:16:56,498 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 02:16:56,498 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:16:56,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:16:56,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274721971] [2023-11-29 02:16:56,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:16:56,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369379651] [2023-11-29 02:16:56,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369379651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:16:56,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:16:56,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:16:56,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641795412] [2023-11-29 02:16:56,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:16:56,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:16:56,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:16:56,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:16:56,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:16:56,502 INFO L87 Difference]: Start difference. First operand 5768 states and 9771 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 02:16:56,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:16:56,937 INFO L93 Difference]: Finished difference Result 14737 states and 25135 transitions. [2023-11-29 02:16:56,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:16:56,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 642 [2023-11-29 02:16:56,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:16:56,968 INFO L225 Difference]: With dead ends: 14737 [2023-11-29 02:16:56,968 INFO L226 Difference]: Without dead ends: 9032 [2023-11-29 02:16:56,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 640 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:16:56,986 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 261 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:16:56,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 1100 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:16:56,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9032 states. [2023-11-29 02:16:57,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9032 to 9015. [2023-11-29 02:16:57,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9015 states, 7233 states have (on average 1.654361952163694) internal successors, (11966), 7249 states have internal predecessors, (11966), 1705 states have call successors, (1705), 76 states have call predecessors, (1705), 76 states have return successors, (1705), 1689 states have call predecessors, (1705), 1705 states have call successors, (1705) [2023-11-29 02:16:57,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9015 states to 9015 states and 15376 transitions. [2023-11-29 02:16:57,933 INFO L78 Accepts]: Start accepts. Automaton has 9015 states and 15376 transitions. Word has length 642 [2023-11-29 02:16:57,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:16:57,935 INFO L495 AbstractCegarLoop]: Abstraction has 9015 states and 15376 transitions. [2023-11-29 02:16:57,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 02:16:57,935 INFO L276 IsEmpty]: Start isEmpty. Operand 9015 states and 15376 transitions. [2023-11-29 02:16:57,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2023-11-29 02:16:57,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:16:57,945 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 02:16:57,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:16:58,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:58,146 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:16:58,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:16:58,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1720786665, now seen corresponding path program 1 times [2023-11-29 02:16:58,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:16:58,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155736661] [2023-11-29 02:16:58,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:58,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:16:58,217 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:16:58,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139792978] [2023-11-29 02:16:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:58,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:58,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:16:58,219 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:16:58,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:16:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:58,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 1511 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:16:58,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:16:58,875 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 02:16:58,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:16:59,233 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 02:16:59,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:16:59,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155736661] [2023-11-29 02:16:59,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:16:59,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139792978] [2023-11-29 02:16:59,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139792978] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:16:59,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:16:59,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 02:16:59,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546196263] [2023-11-29 02:16:59,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:16:59,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:16:59,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:16:59,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:16:59,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:16:59,238 INFO L87 Difference]: Start difference. First operand 9015 states and 15376 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (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 02:17:00,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:17:00,067 INFO L93 Difference]: Finished difference Result 18117 states and 30785 transitions. [2023-11-29 02:17:00,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:17:00,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (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 644 [2023-11-29 02:17:00,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:17:00,098 INFO L225 Difference]: With dead ends: 18117 [2023-11-29 02:17:00,098 INFO L226 Difference]: Without dead ends: 9169 [2023-11-29 02:17:00,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1290 GetRequests, 1280 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:17:00,115 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 619 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:17:00,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 1066 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:17:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9169 states. [2023-11-29 02:17:00,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9169 to 9075. [2023-11-29 02:17:00,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9075 states, 7278 states have (on average 1.6420719978015939) internal successors, (11951), 7294 states have internal predecessors, (11951), 1705 states have call successors, (1705), 91 states have call predecessors, (1705), 91 states have return successors, (1705), 1689 states have call predecessors, (1705), 1705 states have call successors, (1705) [2023-11-29 02:17:00,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9075 states to 9075 states and 15361 transitions. [2023-11-29 02:17:00,960 INFO L78 Accepts]: Start accepts. Automaton has 9075 states and 15361 transitions. Word has length 644 [2023-11-29 02:17:00,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:17:00,961 INFO L495 AbstractCegarLoop]: Abstraction has 9075 states and 15361 transitions. [2023-11-29 02:17:00,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (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 02:17:00,962 INFO L276 IsEmpty]: Start isEmpty. Operand 9075 states and 15361 transitions. [2023-11-29 02:17:00,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2023-11-29 02:17:00,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:17:00,974 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 02:17:00,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 02:17:01,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:01,175 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:17:01,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:17:01,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1476370305, now seen corresponding path program 1 times [2023-11-29 02:17:01,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:17:01,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109284890] [2023-11-29 02:17:01,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:01,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:17:01,234 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:17:01,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605439272] [2023-11-29 02:17:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:01,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:01,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:17:01,235 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:17:01,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:17:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:01,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 1513 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:17:01,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:17:02,764 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 02:17:02,764 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:17:02,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:17:02,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109284890] [2023-11-29 02:17:02,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:17:02,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605439272] [2023-11-29 02:17:02,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605439272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:17:02,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:17:02,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:17:02,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87603125] [2023-11-29 02:17:02,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:17:02,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:17:02,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:17:02,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:17:02,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:17:02,768 INFO L87 Difference]: Start difference. First operand 9075 states and 15361 transitions. Second operand has 6 states, 6 states have (on average 25.5) internal successors, (153), 5 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 02:17:04,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:17:04,767 INFO L93 Difference]: Finished difference Result 27539 states and 45877 transitions. [2023-11-29 02:17:04,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:17:04,768 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 5 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 02:17:04,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:17:04,811 INFO L225 Difference]: With dead ends: 27539 [2023-11-29 02:17:04,811 INFO L226 Difference]: Without dead ends: 18531 [2023-11-29 02:17:04,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 640 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:17:04,825 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 1603 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1603 SdHoareTripleChecker+Valid, 2446 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:17:04,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1603 Valid, 2446 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 02:17:04,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18531 states. [2023-11-29 02:17:05,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18531 to 16440. [2023-11-29 02:17:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16440 states, 13520 states have (on average 1.6256656804733727) internal successors, (21979), 13572 states have internal predecessors, (21979), 2761 states have call successors, (2761), 158 states have call predecessors, (2761), 158 states have return successors, (2761), 2709 states have call predecessors, (2761), 2761 states have call successors, (2761) [2023-11-29 02:17:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16440 states to 16440 states and 27501 transitions. [2023-11-29 02:17:05,910 INFO L78 Accepts]: Start accepts. Automaton has 16440 states and 27501 transitions. Word has length 645 [2023-11-29 02:17:05,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:17:05,911 INFO L495 AbstractCegarLoop]: Abstraction has 16440 states and 27501 transitions. [2023-11-29 02:17:05,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 5 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 02:17:05,911 INFO L276 IsEmpty]: Start isEmpty. Operand 16440 states and 27501 transitions. [2023-11-29 02:17:05,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2023-11-29 02:17:05,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:17:05,924 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 02:17:05,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:17:06,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 02:17:06,124 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:17:06,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:17:06,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1616918915, now seen corresponding path program 1 times [2023-11-29 02:17:06,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:17:06,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290489208] [2023-11-29 02:17:06,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:06,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:17:06,185 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:17:06,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968246549] [2023-11-29 02:17:06,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:06,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:06,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:17:06,187 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:17:06,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:17:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:06,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 1514 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:17:06,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:17:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 3948 proven. 261 refuted. 0 times theorem prover too weak. 15195 trivial. 0 not checked. [2023-11-29 02:17:07,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:17:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 33 proven. 261 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-29 02:17:07,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:17:07,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290489208] [2023-11-29 02:17:07,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:17:07,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968246549] [2023-11-29 02:17:07,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968246549] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:17:07,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:17:07,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 02:17:07,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956402328] [2023-11-29 02:17:07,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:17:07,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:17:07,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:17:07,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:17:07,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:17:07,529 INFO L87 Difference]: Start difference. First operand 16440 states and 27501 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, (186), 2 states have call predecessors, (186), 4 states have return successors, (187), 2 states have call predecessors, (187), 2 states have call successors, (187) [2023-11-29 02:17:08,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:17:08,613 INFO L93 Difference]: Finished difference Result 33439 states and 55450 transitions. [2023-11-29 02:17:08,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:17:08,614 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, (186), 2 states have call predecessors, (186), 4 states have return successors, (187), 2 states have call predecessors, (187), 2 states have call successors, (187) Word has length 645 [2023-11-29 02:17:08,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:17:08,641 INFO L225 Difference]: With dead ends: 33439 [2023-11-29 02:17:08,642 INFO L226 Difference]: Without dead ends: 17070 [2023-11-29 02:17:08,659 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 02:17:08,660 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 537 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:17:08,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 1045 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:17:08,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17070 states. [2023-11-29 02:17:09,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17070 to 16480. [2023-11-29 02:17:09,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16480 states, 13595 states have (on average 1.6076498712762044) internal successors, (21856), 13647 states have internal predecessors, (21856), 2689 states have call successors, (2689), 195 states have call predecessors, (2689), 195 states have return successors, (2689), 2637 states have call predecessors, (2689), 2689 states have call successors, (2689) [2023-11-29 02:17:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16480 states to 16480 states and 27234 transitions. [2023-11-29 02:17:09,677 INFO L78 Accepts]: Start accepts. Automaton has 16480 states and 27234 transitions. Word has length 645 [2023-11-29 02:17:09,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:17:09,678 INFO L495 AbstractCegarLoop]: Abstraction has 16480 states and 27234 transitions. [2023-11-29 02:17:09,678 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, (186), 2 states have call predecessors, (186), 4 states have return successors, (187), 2 states have call predecessors, (187), 2 states have call successors, (187) [2023-11-29 02:17:09,678 INFO L276 IsEmpty]: Start isEmpty. Operand 16480 states and 27234 transitions. [2023-11-29 02:17:09,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2023-11-29 02:17:09,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:17:09,691 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 02:17:09,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:17:09,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 02:17:09,892 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:17:09,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:17:09,892 INFO L85 PathProgramCache]: Analyzing trace with hash -937304824, now seen corresponding path program 1 times [2023-11-29 02:17:09,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:17:09,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631532707] [2023-11-29 02:17:09,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:09,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:17:09,953 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:17:09,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527866671] [2023-11-29 02:17:09,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:09,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:09,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:17:09,955 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:17:09,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:17:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:10,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 1517 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 02:17:10,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:17:11,121 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 02:17:11,121 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:17:11,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:17:11,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631532707] [2023-11-29 02:17:11,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:17:11,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527866671] [2023-11-29 02:17:11,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527866671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:17:11,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:17:11,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:17:11,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504340542] [2023-11-29 02:17:11,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:17:11,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:17:11,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:17:11,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:17:11,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:17:11,126 INFO L87 Difference]: Start difference. First operand 16480 states and 27234 transitions. Second operand has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 5 states have internal predecessors, (154), 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 02:17:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:17:13,663 INFO L93 Difference]: Finished difference Result 43033 states and 70171 transitions. [2023-11-29 02:17:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:17:13,664 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 5 states have internal predecessors, (154), 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 646 [2023-11-29 02:17:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:17:13,706 INFO L225 Difference]: With dead ends: 43033 [2023-11-29 02:17:13,707 INFO L226 Difference]: Without dead ends: 26628 [2023-11-29 02:17:13,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 641 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 02:17:13,727 INFO L413 NwaCegarLoop]: 990 mSDtfsCounter, 799 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 2941 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:17:13,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 2941 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 02:17:13,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26628 states. [2023-11-29 02:17:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26628 to 18988. [2023-11-29 02:17:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18988 states, 15236 states have (on average 1.5980572328695195) internal successors, (24348), 15290 states have internal predecessors, (24348), 3444 states have call successors, (3444), 307 states have call predecessors, (3444), 307 states have return successors, (3444), 3390 states have call predecessors, (3444), 3444 states have call successors, (3444) [2023-11-29 02:17:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18988 states to 18988 states and 31236 transitions. [2023-11-29 02:17:15,211 INFO L78 Accepts]: Start accepts. Automaton has 18988 states and 31236 transitions. Word has length 646 [2023-11-29 02:17:15,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:17:15,212 INFO L495 AbstractCegarLoop]: Abstraction has 18988 states and 31236 transitions. [2023-11-29 02:17:15,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 5 states have internal predecessors, (154), 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 02:17:15,212 INFO L276 IsEmpty]: Start isEmpty. Operand 18988 states and 31236 transitions. [2023-11-29 02:17:15,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2023-11-29 02:17:15,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:17:15,225 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 02:17:15,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:17:15,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 02:17:15,425 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:17:15,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:17:15,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1881210729, now seen corresponding path program 1 times [2023-11-29 02:17:15,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:17:15,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382327022] [2023-11-29 02:17:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:15,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:17:15,483 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:17:15,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065948098] [2023-11-29 02:17:15,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:15,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:15,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:17:15,484 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:17:15,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:17:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:15,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 1518 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:17:15,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:17:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 9150 proven. 108 refuted. 0 times theorem prover too weak. 10146 trivial. 0 not checked. [2023-11-29 02:17:16,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:17:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 186 proven. 108 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-29 02:17:16,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:17:16,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382327022] [2023-11-29 02:17:16,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:17:16,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065948098] [2023-11-29 02:17:16,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065948098] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:17:16,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:17:16,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 02:17:16,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494933009] [2023-11-29 02:17:16,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:17:16,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:17:16,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:17:16,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:17:16,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:17:16,509 INFO L87 Difference]: Start difference. First operand 18988 states and 31236 transitions. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) [2023-11-29 02:17:17,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:17:17,715 INFO L93 Difference]: Finished difference Result 19404 states and 31638 transitions. [2023-11-29 02:17:17,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:17:17,716 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) Word has length 646 [2023-11-29 02:17:17,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:17:17,736 INFO L225 Difference]: With dead ends: 19404 [2023-11-29 02:17:17,737 INFO L226 Difference]: Without dead ends: 13066 [2023-11-29 02:17:17,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1294 GetRequests, 1284 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:17:17,747 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 871 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:17:17,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 1042 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:17:17,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13066 states. [2023-11-29 02:17:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13066 to 12704. [2023-11-29 02:17:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12704 states, 10029 states have (on average 1.5751321168611028) internal successors, (15797), 10063 states have internal predecessors, (15797), 2428 states have call successors, (2428), 246 states have call predecessors, (2428), 246 states have return successors, (2428), 2394 states have call predecessors, (2428), 2428 states have call successors, (2428) [2023-11-29 02:17:18,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12704 states to 12704 states and 20653 transitions. [2023-11-29 02:17:18,913 INFO L78 Accepts]: Start accepts. Automaton has 12704 states and 20653 transitions. Word has length 646 [2023-11-29 02:17:18,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:17:18,914 INFO L495 AbstractCegarLoop]: Abstraction has 12704 states and 20653 transitions. [2023-11-29 02:17:18,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) [2023-11-29 02:17:18,914 INFO L276 IsEmpty]: Start isEmpty. Operand 12704 states and 20653 transitions. [2023-11-29 02:17:18,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2023-11-29 02:17:18,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:17:18,924 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 02:17:18,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 02:17:19,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:19,125 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:17:19,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:17:19,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1623558022, now seen corresponding path program 1 times [2023-11-29 02:17:19,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:17:19,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446576871] [2023-11-29 02:17:19,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:19,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:17:19,174 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:17:19,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848316599] [2023-11-29 02:17:19,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:19,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:19,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:17:19,175 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:17:19,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:17:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:19,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 1517 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:17:19,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:17:20,463 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 02:17:20,463 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:17:20,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:17:20,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446576871] [2023-11-29 02:17:20,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:17:20,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848316599] [2023-11-29 02:17:20,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848316599] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:17:20,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:17:20,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:17:20,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207197447] [2023-11-29 02:17:20,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:17:20,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:17:20,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:17:20,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:17:20,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:17:20,467 INFO L87 Difference]: Start difference. First operand 12704 states and 20653 transitions. Second operand has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 5 states have internal predecessors, (154), 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 02:17:22,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:17:22,130 INFO L93 Difference]: Finished difference Result 30309 states and 49560 transitions. [2023-11-29 02:17:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:17:22,131 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 5 states have internal predecessors, (154), 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 646 [2023-11-29 02:17:22,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:17:22,155 INFO L225 Difference]: With dead ends: 30309 [2023-11-29 02:17:22,155 INFO L226 Difference]: Without dead ends: 17554 [2023-11-29 02:17:22,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 641 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:17:22,171 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 1020 mSDsluCounter, 1433 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:17:22,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1020 Valid, 1972 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 02:17:22,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17554 states. [2023-11-29 02:17:23,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17554 to 15278. [2023-11-29 02:17:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15278 states, 12907 states have (on average 1.6538312543581002) internal successors, (21346), 12922 states have internal predecessors, (21346), 2162 states have call successors, (2162), 208 states have call predecessors, (2162), 208 states have return successors, (2162), 2147 states have call predecessors, (2162), 2162 states have call successors, (2162) [2023-11-29 02:17:23,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15278 states to 15278 states and 25670 transitions. [2023-11-29 02:17:23,125 INFO L78 Accepts]: Start accepts. Automaton has 15278 states and 25670 transitions. Word has length 646 [2023-11-29 02:17:23,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:17:23,126 INFO L495 AbstractCegarLoop]: Abstraction has 15278 states and 25670 transitions. [2023-11-29 02:17:23,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 5 states have internal predecessors, (154), 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 02:17:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 15278 states and 25670 transitions. [2023-11-29 02:17:23,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2023-11-29 02:17:23,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:17:23,139 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 02:17:23,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 02:17:23,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 02:17:23,340 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:17:23,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:17:23,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1757769026, now seen corresponding path program 1 times [2023-11-29 02:17:23,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:17:23,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740727754] [2023-11-29 02:17:23,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:23,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:17:23,395 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:17:23,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434856479] [2023-11-29 02:17:23,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:23,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:23,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:17:23,397 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:17:23,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 02:17:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:23,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 1515 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:17:23,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:17:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 5108 proven. 249 refuted. 0 times theorem prover too weak. 14047 trivial. 0 not checked. [2023-11-29 02:17:24,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:17:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 45 proven. 249 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-29 02:17:24,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:17:24,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740727754] [2023-11-29 02:17:24,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:17:24,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434856479] [2023-11-29 02:17:24,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434856479] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:17:24,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:17:24,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 02:17:24,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844128783] [2023-11-29 02:17:24,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:17:24,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:17:24,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:17:24,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:17:24,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:17:24,816 INFO L87 Difference]: Start difference. First operand 15278 states and 25670 transitions. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (182), 2 states have call predecessors, (182), 4 states have return successors, (183), 2 states have call predecessors, (183), 2 states have call successors, (183) [2023-11-29 02:17:26,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:17:26,051 INFO L93 Difference]: Finished difference Result 30935 states and 51654 transitions. [2023-11-29 02:17:26,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:17:26,052 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (182), 2 states have call predecessors, (182), 4 states have return successors, (183), 2 states have call predecessors, (183), 2 states have call successors, (183) Word has length 646 [2023-11-29 02:17:26,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:17:26,069 INFO L225 Difference]: With dead ends: 30935 [2023-11-29 02:17:26,069 INFO L226 Difference]: Without dead ends: 11889 [2023-11-29 02:17:26,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1294 GetRequests, 1284 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:17:26,083 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 427 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:17:26,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 1033 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:17:26,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11889 states. [2023-11-29 02:17:27,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11889 to 10305. [2023-11-29 02:17:27,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10305 states, 7906 states have (on average 1.5597014925373134) internal successors, (12331), 7921 states have internal predecessors, (12331), 2162 states have call successors, (2162), 236 states have call predecessors, (2162), 236 states have return successors, (2162), 2147 states have call predecessors, (2162), 2162 states have call successors, (2162) [2023-11-29 02:17:27,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10305 states to 10305 states and 16655 transitions. [2023-11-29 02:17:27,035 INFO L78 Accepts]: Start accepts. Automaton has 10305 states and 16655 transitions. Word has length 646 [2023-11-29 02:17:27,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:17:27,035 INFO L495 AbstractCegarLoop]: Abstraction has 10305 states and 16655 transitions. [2023-11-29 02:17:27,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (182), 2 states have call predecessors, (182), 4 states have return successors, (183), 2 states have call predecessors, (183), 2 states have call successors, (183) [2023-11-29 02:17:27,035 INFO L276 IsEmpty]: Start isEmpty. Operand 10305 states and 16655 transitions. [2023-11-29 02:17:27,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2023-11-29 02:17:27,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:17:27,042 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 02:17:27,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 02:17:27,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:17:27,243 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:17:27,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:17:27,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1665796440, now seen corresponding path program 1 times [2023-11-29 02:17:27,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:17:27,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709182241] [2023-11-29 02:17:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:27,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:17:27,294 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:17:27,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570119295] [2023-11-29 02:17:27,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:27,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:27,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:17:27,296 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:17:27,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 02:17:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:27,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 1517 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:17:27,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:17:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 9420 proven. 117 refuted. 0 times theorem prover too weak. 9867 trivial. 0 not checked. [2023-11-29 02:17:28,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:17:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 177 proven. 117 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-29 02:17:29,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:17:29,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709182241] [2023-11-29 02:17:29,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:17:29,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570119295] [2023-11-29 02:17:29,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570119295] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:17:29,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:17:29,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-29 02:17:29,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594825587] [2023-11-29 02:17:29,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:17:29,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 02:17:29,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:17:29,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 02:17:29,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:17:29,141 INFO L87 Difference]: Start difference. First operand 10305 states and 16655 transitions. Second operand has 16 states, 16 states have (on average 16.125) internal successors, (258), 16 states have internal predecessors, (258), 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 02:17:32,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:17:32,980 INFO L93 Difference]: Finished difference Result 23136 states and 36198 transitions. [2023-11-29 02:17:32,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 02:17:32,981 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 16.125) internal successors, (258), 16 states have internal predecessors, (258), 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 02:17:32,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:17:33,002 INFO L225 Difference]: With dead ends: 23136 [2023-11-29 02:17:33,002 INFO L226 Difference]: Without dead ends: 12780 [2023-11-29 02:17:33,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1317 GetRequests, 1280 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=445, Invalid=1037, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 02:17:33,017 INFO L413 NwaCegarLoop]: 791 mSDtfsCounter, 1257 mSDsluCounter, 2482 mSDsCounter, 0 mSdLazyCounter, 1980 mSolverCounterSat, 727 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 3273 SdHoareTripleChecker+Invalid, 2707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 727 IncrementalHoareTripleChecker+Valid, 1980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:17:33,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1275 Valid, 3273 Invalid, 2707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [727 Valid, 1980 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 02:17:33,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12780 states. [2023-11-29 02:17:34,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12780 to 9255. [2023-11-29 02:17:34,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9255 states, 6870 states have (on average 1.5157205240174672) internal successors, (10413), 6883 states have internal predecessors, (10413), 2080 states have call successors, (2080), 304 states have call predecessors, (2080), 304 states have return successors, (2080), 2067 states have call predecessors, (2080), 2080 states have call successors, (2080) [2023-11-29 02:17:34,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9255 states to 9255 states and 14573 transitions. [2023-11-29 02:17:34,083 INFO L78 Accepts]: Start accepts. Automaton has 9255 states and 14573 transitions. Word has length 646 [2023-11-29 02:17:34,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:17:34,083 INFO L495 AbstractCegarLoop]: Abstraction has 9255 states and 14573 transitions. [2023-11-29 02:17:34,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.125) internal successors, (258), 16 states have internal predecessors, (258), 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 02:17:34,083 INFO L276 IsEmpty]: Start isEmpty. Operand 9255 states and 14573 transitions. [2023-11-29 02:17:34,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2023-11-29 02:17:34,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:17:34,089 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 02:17:34,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 02:17:34,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 02:17:34,290 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:17:34,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:17:34,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1808428294, now seen corresponding path program 1 times [2023-11-29 02:17:34,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:17:34,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93550192] [2023-11-29 02:17:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:34,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:17:34,335 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:17:34,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147841171] [2023-11-29 02:17:34,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:34,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:34,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:17:34,337 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:17:34,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 02:17:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:34,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 1514 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:17:34,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:17:36,236 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 02:17:36,236 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:17:36,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:17:36,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93550192] [2023-11-29 02:17:36,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:17:36,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147841171] [2023-11-29 02:17:36,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147841171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:17:36,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:17:36,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:17:36,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858122488] [2023-11-29 02:17:36,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:17:36,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:17:36,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:17:36,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:17:36,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:17:36,240 INFO L87 Difference]: Start difference. First operand 9255 states and 14573 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 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 02:17:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:17:45,608 INFO L93 Difference]: Finished difference Result 81375 states and 127507 transitions. [2023-11-29 02:17:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:17:45,609 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 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 02:17:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:17:45,729 INFO L225 Difference]: With dead ends: 81375 [2023-11-29 02:17:45,729 INFO L226 Difference]: Without dead ends: 72121 [2023-11-29 02:17:45,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 642 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:17:45,759 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 2945 mSDsluCounter, 3361 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2945 SdHoareTripleChecker+Valid, 4017 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:17:45,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2945 Valid, 4017 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [559 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 02:17:45,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72121 states. [2023-11-29 02:17:53,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72121 to 71479. [2023-11-29 02:17:54,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71479 states, 54606 states have (on average 1.5118851408270153) internal successors, (82558), 54814 states have internal predecessors, (82558), 14508 states have call successors, (14508), 2364 states have call predecessors, (14508), 2364 states have return successors, (14508), 14300 states have call predecessors, (14508), 14508 states have call successors, (14508) [2023-11-29 02:17:54,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71479 states to 71479 states and 111574 transitions. [2023-11-29 02:17:54,184 INFO L78 Accepts]: Start accepts. Automaton has 71479 states and 111574 transitions. Word has length 647 [2023-11-29 02:17:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:17:54,185 INFO L495 AbstractCegarLoop]: Abstraction has 71479 states and 111574 transitions. [2023-11-29 02:17:54,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 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 02:17:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 71479 states and 111574 transitions. [2023-11-29 02:17:54,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2023-11-29 02:17:54,208 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:17:54,209 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 02:17:54,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 02:17:54,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:54,409 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:17:54,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:17:54,410 INFO L85 PathProgramCache]: Analyzing trace with hash -924919304, now seen corresponding path program 1 times [2023-11-29 02:17:54,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:17:54,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823233508] [2023-11-29 02:17:54,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:54,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:17:54,458 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:17:54,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227465364] [2023-11-29 02:17:54,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:54,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:54,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:17:54,459 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:17:54,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 02:17:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:54,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 1516 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:17:54,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:17:55,828 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 9780 proven. 153 refuted. 0 times theorem prover too weak. 9471 trivial. 0 not checked. [2023-11-29 02:17:55,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:17:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 141 proven. 153 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-29 02:17:56,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:17:56,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823233508] [2023-11-29 02:17:56,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:17:56,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227465364] [2023-11-29 02:17:56,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227465364] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:17:56,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:17:56,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-29 02:17:56,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887279678] [2023-11-29 02:17:56,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:17:56,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:17:56,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:17:56,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:17:56,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:17:56,449 INFO L87 Difference]: Start difference. First operand 71479 states and 111574 transitions. Second operand has 14 states, 14 states have (on average 19.857142857142858) internal successors, (278), 14 states have internal predecessors, (278), 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 02:18:25,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:18:25,847 INFO L93 Difference]: Finished difference Result 285593 states and 440003 transitions. [2023-11-29 02:18:25,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 02:18:25,848 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 19.857142857142858) internal successors, (278), 14 states have internal predecessors, (278), 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 647 [2023-11-29 02:18:25,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:18:26,261 INFO L225 Difference]: With dead ends: 285593 [2023-11-29 02:18:26,261 INFO L226 Difference]: Without dead ends: 214115 [2023-11-29 02:18:26,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1337 GetRequests, 1288 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=712, Invalid=1838, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 02:18:26,361 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 3648 mSDsluCounter, 4712 mSDsCounter, 0 mSdLazyCounter, 3479 mSolverCounterSat, 1307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3841 SdHoareTripleChecker+Valid, 5234 SdHoareTripleChecker+Invalid, 4786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1307 IncrementalHoareTripleChecker+Valid, 3479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:18:26,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3841 Valid, 5234 Invalid, 4786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1307 Valid, 3479 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-29 02:18:26,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214115 states. [2023-11-29 02:18:48,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214115 to 175191. [2023-11-29 02:18:48,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175191 states, 134344 states have (on average 1.5047936640266777) internal successors, (202160), 134922 states have internal predecessors, (202160), 34986 states have call successors, (34986), 5860 states have call predecessors, (34986), 5860 states have return successors, (34986), 34408 states have call predecessors, (34986), 34986 states have call successors, (34986) [2023-11-29 02:18:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175191 states to 175191 states and 272132 transitions. [2023-11-29 02:18:48,995 INFO L78 Accepts]: Start accepts. Automaton has 175191 states and 272132 transitions. Word has length 647 [2023-11-29 02:18:48,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:18:48,995 INFO L495 AbstractCegarLoop]: Abstraction has 175191 states and 272132 transitions. [2023-11-29 02:18:48,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.857142857142858) internal successors, (278), 14 states have internal predecessors, (278), 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 02:18:48,996 INFO L276 IsEmpty]: Start isEmpty. Operand 175191 states and 272132 transitions. [2023-11-29 02:18:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2023-11-29 02:18:49,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:18:49,042 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 02:18:49,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 02:18:49,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:18:49,242 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:18:49,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:18:49,243 INFO L85 PathProgramCache]: Analyzing trace with hash 916572119, now seen corresponding path program 1 times [2023-11-29 02:18:49,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:18:49,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447251957] [2023-11-29 02:18:49,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:18:49,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:18:49,541 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:18:49,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490626318] [2023-11-29 02:18:49,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:18:49,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:18:49,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:18:49,545 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:18:49,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 02:18:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:18:49,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 1517 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 02:18:49,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:18:50,023 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 02:18:50,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:18:50,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:18:50,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447251957] [2023-11-29 02:18:50,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:18:50,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490626318] [2023-11-29 02:18:50,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490626318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:18:50,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:18:50,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:18:50,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339041761] [2023-11-29 02:18:50,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:18:50,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:18:50,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:18:50,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:18:50,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:18:50,026 INFO L87 Difference]: Start difference. First operand 175191 states and 272132 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 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 02:19:28,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:28,352 INFO L93 Difference]: Finished difference Result 481100 states and 743927 transitions. [2023-11-29 02:19:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:19:28,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 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 02:19:28,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:29,273 INFO L225 Difference]: With dead ends: 481100 [2023-11-29 02:19:29,273 INFO L226 Difference]: Without dead ends: 305910 [2023-11-29 02:19:29,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 645 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:19:29,655 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 613 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 1668 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:29,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 1668 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:19:29,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305910 states. [2023-11-29 02:20:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305910 to 210403. [2023-11-29 02:20:02,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210403 states, 159848 states have (on average 1.4461488413993293) internal successors, (231164), 161327 states have internal predecessors, (231164), 43094 states have call successors, (43094), 7460 states have call predecessors, (43094), 7460 states have return successors, (43094), 41615 states have call predecessors, (43094), 43094 states have call successors, (43094) [2023-11-29 02:20:03,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210403 states to 210403 states and 317352 transitions. [2023-11-29 02:20:03,919 INFO L78 Accepts]: Start accepts. Automaton has 210403 states and 317352 transitions. Word has length 648 [2023-11-29 02:20:03,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:20:03,919 INFO L495 AbstractCegarLoop]: Abstraction has 210403 states and 317352 transitions. [2023-11-29 02:20:03,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 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 02:20:03,920 INFO L276 IsEmpty]: Start isEmpty. Operand 210403 states and 317352 transitions. [2023-11-29 02:20:03,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2023-11-29 02:20:03,982 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:20:03,982 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 02:20:03,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 02:20:04,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 02:20:04,183 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:20:04,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:04,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1326854633, now seen corresponding path program 1 times [2023-11-29 02:20:04,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:04,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721487812] [2023-11-29 02:20:04,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:04,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:04,233 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:20:04,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434352620] [2023-11-29 02:20:04,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:04,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:20:04,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:20:04,235 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:20:04,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 02:20:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:04,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 1520 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:20:04,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:20:05,221 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 02:20:05,222 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:20:05,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:05,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721487812] [2023-11-29 02:20:05,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:20:05,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434352620] [2023-11-29 02:20:05,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434352620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:20:05,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:20:05,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:20:05,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95006000] [2023-11-29 02:20:05,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:20:05,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:20:05,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:05,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:20:05,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:20:05,224 INFO L87 Difference]: Start difference. First operand 210403 states and 317352 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 6 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 02:20:48,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:20:48,932 INFO L93 Difference]: Finished difference Result 531942 states and 806123 transitions. [2023-11-29 02:20:48,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:20:48,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 6 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 02:20:48,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:20:49,862 INFO L225 Difference]: With dead ends: 531942 [2023-11-29 02:20:49,862 INFO L226 Difference]: Without dead ends: 384238 [2023-11-29 02:20:50,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 643 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:20:50,070 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 1054 mSDsluCounter, 2898 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 3415 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:20:50,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1054 Valid, 3415 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 02:20:50,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384238 states. [2023-11-29 02:21:23,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384238 to 254796. [2023-11-29 02:21:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254796 states, 203668 states have (on average 1.4799035685527426) internal successors, (301409), 205156 states have internal predecessors, (301409), 43585 states have call successors, (43585), 7542 states have call predecessors, (43585), 7542 states have return successors, (43585), 42097 states have call predecessors, (43585), 43585 states have call successors, (43585) [2023-11-29 02:21:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254796 states to 254796 states and 388579 transitions. [2023-11-29 02:21:25,300 INFO L78 Accepts]: Start accepts. Automaton has 254796 states and 388579 transitions. Word has length 649 [2023-11-29 02:21:25,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:21:25,301 INFO L495 AbstractCegarLoop]: Abstraction has 254796 states and 388579 transitions. [2023-11-29 02:21:25,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 6 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 02:21:25,301 INFO L276 IsEmpty]: Start isEmpty. Operand 254796 states and 388579 transitions. [2023-11-29 02:21:25,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2023-11-29 02:21:25,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:21:25,367 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 02:21:25,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 02:21:25,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 02:21:25,568 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:21:25,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:25,568 INFO L85 PathProgramCache]: Analyzing trace with hash 305786279, now seen corresponding path program 1 times [2023-11-29 02:21:25,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:25,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162630604] [2023-11-29 02:21:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:25,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:25,615 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:21:25,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096516950] [2023-11-29 02:21:25,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:25,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:25,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:25,618 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:25,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4455baa-8e47-4160-9177-4a0e966748a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 02:21:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:26,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 1520 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:21:26,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 10733 proven. 405 refuted. 0 times theorem prover too weak. 8266 trivial. 0 not checked. [2023-11-29 02:21:27,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:21:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 117 proven. 177 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-29 02:21:28,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:28,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162630604] [2023-11-29 02:21:28,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:21:28,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096516950] [2023-11-29 02:21:28,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096516950] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:21:28,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:21:28,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2023-11-29 02:21:28,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230346244] [2023-11-29 02:21:28,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:21:28,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 02:21:28,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:28,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 02:21:28,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-11-29 02:21:28,154 INFO L87 Difference]: Start difference. First operand 254796 states and 388579 transitions. Second operand has 17 states, 17 states have (on average 16.11764705882353) internal successors, (274), 17 states have internal predecessors, (274), 4 states have call successors, (176), 3 states have call predecessors, (176), 6 states have return successors, (177), 4 states have call predecessors, (177), 4 states have call successors, (177) [2023-11-29 02:28:14,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:28:14,319 INFO L93 Difference]: Finished difference Result 2866830 states and 4203044 transitions. [2023-11-29 02:28:14,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2023-11-29 02:28:14,319 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 16.11764705882353) internal successors, (274), 17 states have internal predecessors, (274), 4 states have call successors, (176), 3 states have call predecessors, (176), 6 states have return successors, (177), 4 states have call predecessors, (177), 4 states have call successors, (177) Word has length 649 [2023-11-29 02:28:14,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:28:22,339 INFO L225 Difference]: With dead ends: 2866830 [2023-11-29 02:28:22,339 INFO L226 Difference]: Without dead ends: 2634326 [2023-11-29 02:28:23,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1466 GetRequests, 1291 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13745 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4981, Invalid=26171, Unknown=0, NotChecked=0, Total=31152 [2023-11-29 02:28:23,245 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 8900 mSDsluCounter, 3111 mSDsCounter, 0 mSdLazyCounter, 3001 mSolverCounterSat, 3817 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8900 SdHoareTripleChecker+Valid, 3785 SdHoareTripleChecker+Invalid, 6818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3817 IncrementalHoareTripleChecker+Valid, 3001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:28:23,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8900 Valid, 3785 Invalid, 6818 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3817 Valid, 3001 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-11-29 02:28:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634326 states.