./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-34.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_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/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_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-34.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/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_687f3207-2167-4559-9330-72c25b44ea7a/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 19ddd5d3e870010456648368aac7f13027e543c029bb47d44edea54e5df0ea2e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:33:16,639 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:33:16,717 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:33:16,721 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:33:16,721 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:33:16,752 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:33:16,753 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:33:16,753 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:33:16,754 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:33:16,754 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:33:16,755 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:33:16,755 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:33:16,756 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:33:16,757 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:33:16,757 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:33:16,758 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:33:16,758 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:33:16,759 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:33:16,759 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:33:16,760 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:33:16,760 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:33:16,761 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:33:16,761 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:33:16,762 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:33:16,762 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:33:16,762 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:33:16,763 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:33:16,763 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:33:16,764 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:33:16,764 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:33:16,764 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:33:16,764 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:33:16,765 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:33:16,765 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:33:16,765 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:33:16,765 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:33:16,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:33:16,766 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:33:16,766 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:33:16,766 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:33:16,766 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:33:16,767 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:33:16,767 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_687f3207-2167-4559-9330-72c25b44ea7a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19ddd5d3e870010456648368aac7f13027e543c029bb47d44edea54e5df0ea2e [2023-11-29 02:33:16,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:33:17,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:33:17,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:33:17,016 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:33:17,017 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:33:17,018 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-34.i [2023-11-29 02:33:19,754 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:33:19,986 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:33:19,987 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-34.i [2023-11-29 02:33:19,997 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/data/a7d318058/07a973506ec94f76bbaef4d280be455f/FLAGd4a1b1c76 [2023-11-29 02:33:20,013 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/data/a7d318058/07a973506ec94f76bbaef4d280be455f [2023-11-29 02:33:20,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:33:20,017 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:33:20,019 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:33:20,019 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:33:20,025 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:33:20,025 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:33:20" (1/1) ... [2023-11-29 02:33:20,026 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69ba1223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:20, skipping insertion in model container [2023-11-29 02:33:20,027 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:33:20" (1/1) ... [2023-11-29 02:33:20,063 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:33:20,214 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_687f3207-2167-4559-9330-72c25b44ea7a/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-34.i[919,932] [2023-11-29 02:33:20,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:33:20,298 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:33:20,310 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_687f3207-2167-4559-9330-72c25b44ea7a/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-34.i[919,932] [2023-11-29 02:33:20,348 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:33:20,366 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:33:20,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:20 WrapperNode [2023-11-29 02:33:20,367 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:33:20,368 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:33:20,368 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:33:20,369 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:33:20,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:20" (1/1) ... [2023-11-29 02:33:20,388 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:20" (1/1) ... [2023-11-29 02:33:20,433 INFO L138 Inliner]: procedures = 26, calls = 33, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 225 [2023-11-29 02:33:20,434 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:33:20,435 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:33:20,435 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:33:20,435 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:33:20,447 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:20" (1/1) ... [2023-11-29 02:33:20,447 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:20" (1/1) ... [2023-11-29 02:33:20,451 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:20" (1/1) ... [2023-11-29 02:33:20,471 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 02:33:20,472 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:20" (1/1) ... [2023-11-29 02:33:20,472 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:20" (1/1) ... [2023-11-29 02:33:20,485 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:20" (1/1) ... [2023-11-29 02:33:20,489 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:20" (1/1) ... [2023-11-29 02:33:20,492 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:20" (1/1) ... [2023-11-29 02:33:20,495 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:20" (1/1) ... [2023-11-29 02:33:20,500 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:33:20,501 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:33:20,501 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:33:20,501 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:33:20,502 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:20" (1/1) ... [2023-11-29 02:33:20,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:33:20,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:20,533 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:33:20,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:33:20,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:33:20,577 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 02:33:20,578 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 02:33:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:33:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:33:20,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:33:20,675 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:33:20,677 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:33:21,070 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:33:21,099 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:33:21,100 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 02:33:21,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:33:21 BoogieIcfgContainer [2023-11-29 02:33:21,100 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:33:21,103 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:33:21,103 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:33:21,106 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:33:21,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:33:20" (1/3) ... [2023-11-29 02:33:21,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b70db62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:33:21, skipping insertion in model container [2023-11-29 02:33:21,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:20" (2/3) ... [2023-11-29 02:33:21,108 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b70db62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:33:21, skipping insertion in model container [2023-11-29 02:33:21,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:33:21" (3/3) ... [2023-11-29 02:33:21,109 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pr-ci_file-34.i [2023-11-29 02:33:21,129 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:33:21,129 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:33:21,179 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:33:21,186 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;@35ca1072, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:33:21,186 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:33:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 60 states have (on average 1.6) internal successors, (96), 61 states have internal predecessors, (96), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-29 02:33:21,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-29 02:33:21,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:21,203 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:21,204 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:33:21,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:21,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1457782391, now seen corresponding path program 1 times [2023-11-29 02:33:21,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:21,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682387103] [2023-11-29 02:33:21,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:21,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:21,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:21,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682387103] [2023-11-29 02:33:21,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 02:33:21,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991340676] [2023-11-29 02:33:21,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:21,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:21,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:21,429 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:21,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:33:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:21,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 02:33:21,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2023-11-29 02:33:21,639 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:33:21,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991340676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:33:21,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:33:21,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:33:21,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845779247] [2023-11-29 02:33:21,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:33:21,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 02:33:21,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:21,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 02:33:21,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:33:21,679 INFO L87 Difference]: Start difference. First operand has 83 states, 60 states have (on average 1.6) internal successors, (96), 61 states have internal predecessors, (96), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-29 02:33:21,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:21,720 INFO L93 Difference]: Finished difference Result 163 states and 290 transitions. [2023-11-29 02:33:21,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 02:33:21,723 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 2 states have call successors, (20) Word has length 137 [2023-11-29 02:33:21,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:21,731 INFO L225 Difference]: With dead ends: 163 [2023-11-29 02:33:21,731 INFO L226 Difference]: Without dead ends: 81 [2023-11-29 02:33:21,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 136 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 02:33:21,757 INFO L413 NwaCegarLoop]: 127 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, 127 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 02:33:21,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 127 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:33:21,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-29 02:33:21,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-29 02:33:21,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.5254237288135593) internal successors, (90), 59 states have internal predecessors, (90), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-29 02:33:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 130 transitions. [2023-11-29 02:33:21,836 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 130 transitions. Word has length 137 [2023-11-29 02:33:21,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:21,837 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 130 transitions. [2023-11-29 02:33:21,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-29 02:33:21,837 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 130 transitions. [2023-11-29 02:33:21,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-29 02:33:21,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:21,841 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:21,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:33:22,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 02:33:22,042 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:33:22,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:22,043 INFO L85 PathProgramCache]: Analyzing trace with hash 986317253, now seen corresponding path program 1 times [2023-11-29 02:33:22,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:22,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338430607] [2023-11-29 02:33:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:22,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:22,111 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:33:22,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055830061] [2023-11-29 02:33:22,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:22,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:22,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:22,114 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:22,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:33:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:22,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:33:22,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 02:33:22,522 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:33:22,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:22,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338430607] [2023-11-29 02:33:22,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:33:22,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055830061] [2023-11-29 02:33:22,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055830061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:33:22,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:33:22,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:33:22,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206607312] [2023-11-29 02:33:22,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:33:22,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:33:22,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:22,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:33:22,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:33:22,526 INFO L87 Difference]: Start difference. First operand 81 states and 130 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:33:22,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:22,866 INFO L93 Difference]: Finished difference Result 240 states and 384 transitions. [2023-11-29 02:33:22,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:33:22,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 137 [2023-11-29 02:33:22,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:22,874 INFO L225 Difference]: With dead ends: 240 [2023-11-29 02:33:22,874 INFO L226 Difference]: Without dead ends: 160 [2023-11-29 02:33:22,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:33:22,877 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 151 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:22,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 453 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:33:22,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-29 02:33:22,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 83. [2023-11-29 02:33:22,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 61 states have internal predecessors, (92), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-29 02:33:22,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 132 transitions. [2023-11-29 02:33:22,898 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 132 transitions. Word has length 137 [2023-11-29 02:33:22,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:22,900 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 132 transitions. [2023-11-29 02:33:22,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:33:22,900 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 132 transitions. [2023-11-29 02:33:22,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-29 02:33:22,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:22,903 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:22,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:33:23,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:23,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:33:23,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:23,108 INFO L85 PathProgramCache]: Analyzing trace with hash -40434886, now seen corresponding path program 1 times [2023-11-29 02:33:23,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:23,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929091205] [2023-11-29 02:33:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:23,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:23,190 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:33:23,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884278735] [2023-11-29 02:33:23,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:23,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:23,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:23,193 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:23,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:33:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:23,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:33:23,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 02:33:23,552 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:33:23,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:23,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929091205] [2023-11-29 02:33:23,552 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:33:23,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884278735] [2023-11-29 02:33:23,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884278735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:33:23,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:33:23,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:33:23,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720632761] [2023-11-29 02:33:23,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:33:23,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:33:23,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:23,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:33:23,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:33:23,556 INFO L87 Difference]: Start difference. First operand 83 states and 132 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:33:23,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:23,695 INFO L93 Difference]: Finished difference Result 286 states and 456 transitions. [2023-11-29 02:33:23,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:33:23,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 138 [2023-11-29 02:33:23,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:23,699 INFO L225 Difference]: With dead ends: 286 [2023-11-29 02:33:23,699 INFO L226 Difference]: Without dead ends: 204 [2023-11-29 02:33:23,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 135 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 02:33:23,702 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 149 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:23,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 424 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:33:23,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-29 02:33:23,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 173. [2023-11-29 02:33:23,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 130 states have (on average 1.523076923076923) internal successors, (198), 130 states have internal predecessors, (198), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 02:33:23,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 278 transitions. [2023-11-29 02:33:23,737 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 278 transitions. Word has length 138 [2023-11-29 02:33:23,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:23,738 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 278 transitions. [2023-11-29 02:33:23,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:33:23,738 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 278 transitions. [2023-11-29 02:33:23,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 02:33:23,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:23,741 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:23,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:33:23,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:23,948 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:33:23,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:23,949 INFO L85 PathProgramCache]: Analyzing trace with hash 677696352, now seen corresponding path program 1 times [2023-11-29 02:33:23,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:23,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513705716] [2023-11-29 02:33:23,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:23,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:23,990 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:33:23,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36968557] [2023-11-29 02:33:23,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:23,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:23,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:23,992 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:23,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:33:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:24,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 02:33:24,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 159 proven. 51 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2023-11-29 02:33:24,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:33:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 02:33:25,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:25,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513705716] [2023-11-29 02:33:25,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:33:25,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36968557] [2023-11-29 02:33:25,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36968557] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:33:25,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:33:25,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2023-11-29 02:33:25,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278592510] [2023-11-29 02:33:25,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:33:25,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 02:33:25,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:25,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 02:33:25,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:33:25,251 INFO L87 Difference]: Start difference. First operand 173 states and 278 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:33:26,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:26,132 INFO L93 Difference]: Finished difference Result 574 states and 906 transitions. [2023-11-29 02:33:26,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 02:33:26,132 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 139 [2023-11-29 02:33:26,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:26,136 INFO L225 Difference]: With dead ends: 574 [2023-11-29 02:33:26,136 INFO L226 Difference]: Without dead ends: 402 [2023-11-29 02:33:26,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:33:26,139 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 321 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:26,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 617 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:33:26,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-11-29 02:33:26,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 285. [2023-11-29 02:33:26,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 226 states have (on average 1.5575221238938053) internal successors, (352), 228 states have internal predecessors, (352), 54 states have call successors, (54), 4 states have call predecessors, (54), 4 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-29 02:33:26,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 460 transitions. [2023-11-29 02:33:26,182 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 460 transitions. Word has length 139 [2023-11-29 02:33:26,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:26,183 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 460 transitions. [2023-11-29 02:33:26,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:33:26,184 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 460 transitions. [2023-11-29 02:33:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 02:33:26,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:26,186 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:26,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:33:26,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:26,387 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:33:26,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:26,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1995674993, now seen corresponding path program 1 times [2023-11-29 02:33:26,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:26,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571716933] [2023-11-29 02:33:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:26,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:26,426 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:33:26,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999395786] [2023-11-29 02:33:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:26,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:26,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:26,428 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:26,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:33:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:26,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 02:33:26,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 438 proven. 111 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2023-11-29 02:33:28,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:33:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 81 proven. 129 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2023-11-29 02:33:29,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:29,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571716933] [2023-11-29 02:33:29,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:33:29,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999395786] [2023-11-29 02:33:29,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999395786] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:33:29,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:33:29,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 37 [2023-11-29 02:33:29,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922775034] [2023-11-29 02:33:29,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:33:29,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 02:33:29,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:29,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 02:33:29,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=924, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 02:33:29,608 INFO L87 Difference]: Start difference. First operand 285 states and 460 transitions. Second operand has 37 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 10 states have call successors, (40), 6 states have call predecessors, (40), 12 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2023-11-29 02:33:36,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:36,437 INFO L93 Difference]: Finished difference Result 1735 states and 2733 transitions. [2023-11-29 02:33:36,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-11-29 02:33:36,438 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 10 states have call successors, (40), 6 states have call predecessors, (40), 12 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) Word has length 139 [2023-11-29 02:33:36,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:36,447 INFO L225 Difference]: With dead ends: 1735 [2023-11-29 02:33:36,447 INFO L226 Difference]: Without dead ends: 1451 [2023-11-29 02:33:36,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4967 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3706, Invalid=7214, Unknown=0, NotChecked=0, Total=10920 [2023-11-29 02:33:36,453 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 2709 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 2499 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2711 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 3102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 2499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:36,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2711 Valid, 1578 Invalid, 3102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 2499 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-29 02:33:36,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2023-11-29 02:33:36,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 817. [2023-11-29 02:33:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 661 states have (on average 1.5431164901664145) internal successors, (1020), 667 states have internal predecessors, (1020), 134 states have call successors, (134), 21 states have call predecessors, (134), 21 states have return successors, (134), 128 states have call predecessors, (134), 134 states have call successors, (134) [2023-11-29 02:33:36,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1288 transitions. [2023-11-29 02:33:36,586 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1288 transitions. Word has length 139 [2023-11-29 02:33:36,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:36,587 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 1288 transitions. [2023-11-29 02:33:36,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 10 states have call successors, (40), 6 states have call predecessors, (40), 12 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2023-11-29 02:33:36,588 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1288 transitions. [2023-11-29 02:33:36,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 02:33:36,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:36,590 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:36,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:33:36,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:36,791 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:33:36,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:36,791 INFO L85 PathProgramCache]: Analyzing trace with hash 811709858, now seen corresponding path program 1 times [2023-11-29 02:33:36,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:36,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652729542] [2023-11-29 02:33:36,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:36,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:36,821 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:33:36,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251619464] [2023-11-29 02:33:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:36,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:36,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:36,823 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:36,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:33:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:36,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 02:33:36,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 393 proven. 24 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2023-11-29 02:33:37,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:33:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2023-11-29 02:33:37,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:37,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652729542] [2023-11-29 02:33:37,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:33:37,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251619464] [2023-11-29 02:33:37,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251619464] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:33:37,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:33:37,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-29 02:33:37,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421677157] [2023-11-29 02:33:37,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:33:37,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:33:37,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:37,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:33:37,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:33:37,223 INFO L87 Difference]: Start difference. First operand 817 states and 1288 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-11-29 02:33:37,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:37,619 INFO L93 Difference]: Finished difference Result 1182 states and 1828 transitions. [2023-11-29 02:33:37,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 02:33:37,620 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 139 [2023-11-29 02:33:37,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:37,626 INFO L225 Difference]: With dead ends: 1182 [2023-11-29 02:33:37,626 INFO L226 Difference]: Without dead ends: 765 [2023-11-29 02:33:37,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:33:37,628 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 241 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:37,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 555 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:33:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2023-11-29 02:33:37,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 733. [2023-11-29 02:33:37,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 578 states have (on average 1.4844290657439447) internal successors, (858), 583 states have internal predecessors, (858), 129 states have call successors, (129), 25 states have call predecessors, (129), 25 states have return successors, (129), 124 states have call predecessors, (129), 129 states have call successors, (129) [2023-11-29 02:33:37,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1116 transitions. [2023-11-29 02:33:37,734 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1116 transitions. Word has length 139 [2023-11-29 02:33:37,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:37,735 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 1116 transitions. [2023-11-29 02:33:37,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-11-29 02:33:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1116 transitions. [2023-11-29 02:33:37,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 02:33:37,736 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:37,737 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:37,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:33:37,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:37,937 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:33:37,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:37,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1234411684, now seen corresponding path program 1 times [2023-11-29 02:33:37,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:37,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292670545] [2023-11-29 02:33:37,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:37,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:37,963 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:33:37,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321998090] [2023-11-29 02:33:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:37,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:37,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:37,965 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:37,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:33:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:38,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 02:33:38,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 460 proven. 129 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-11-29 02:33:39,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:33:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2023-11-29 02:33:41,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:41,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292670545] [2023-11-29 02:33:41,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:33:41,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321998090] [2023-11-29 02:33:41,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321998090] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:33:41,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:33:41,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 33 [2023-11-29 02:33:41,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128107216] [2023-11-29 02:33:41,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:33:41,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 02:33:41,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:41,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 02:33:41,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 02:33:41,417 INFO L87 Difference]: Start difference. First operand 733 states and 1116 transitions. Second operand has 33 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 31 states have internal predecessors, (104), 10 states have call successors, (40), 6 states have call predecessors, (40), 12 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2023-11-29 02:33:48,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:48,203 INFO L93 Difference]: Finished difference Result 2760 states and 4201 transitions. [2023-11-29 02:33:48,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-29 02:33:48,203 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 31 states have internal predecessors, (104), 10 states have call successors, (40), 6 states have call predecessors, (40), 12 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) Word has length 139 [2023-11-29 02:33:48,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:48,215 INFO L225 Difference]: With dead ends: 2760 [2023-11-29 02:33:48,215 INFO L226 Difference]: Without dead ends: 2087 [2023-11-29 02:33:48,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2190 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1544, Invalid=5428, Unknown=0, NotChecked=0, Total=6972 [2023-11-29 02:33:48,221 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 1741 mSDsluCounter, 2095 mSDsCounter, 0 mSdLazyCounter, 4129 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1755 SdHoareTripleChecker+Valid, 2327 SdHoareTripleChecker+Invalid, 4562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 4129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:48,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1755 Valid, 2327 Invalid, 4562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 4129 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-11-29 02:33:48,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2023-11-29 02:33:48,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 1187. [2023-11-29 02:33:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 960 states have (on average 1.4854166666666666) internal successors, (1426), 965 states have internal predecessors, (1426), 189 states have call successors, (189), 37 states have call predecessors, (189), 37 states have return successors, (189), 184 states have call predecessors, (189), 189 states have call successors, (189) [2023-11-29 02:33:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1804 transitions. [2023-11-29 02:33:48,418 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1804 transitions. Word has length 139 [2023-11-29 02:33:48,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:48,419 INFO L495 AbstractCegarLoop]: Abstraction has 1187 states and 1804 transitions. [2023-11-29 02:33:48,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 31 states have internal predecessors, (104), 10 states have call successors, (40), 6 states have call predecessors, (40), 12 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2023-11-29 02:33:48,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1804 transitions. [2023-11-29 02:33:48,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 02:33:48,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:48,422 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:48,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:33:48,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:48,623 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:33:48,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:48,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1453266402, now seen corresponding path program 1 times [2023-11-29 02:33:48,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:48,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303544514] [2023-11-29 02:33:48,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:48,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:48,647 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:33:48,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570645266] [2023-11-29 02:33:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:48,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:48,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:48,649 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:48,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:33:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:49,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 02:33:49,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:52,185 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 02:33:52,185 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:33:52,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:52,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303544514] [2023-11-29 02:33:52,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:33:52,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570645266] [2023-11-29 02:33:52,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570645266] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:33:52,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:33:52,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 02:33:52,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596481910] [2023-11-29 02:33:52,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:33:52,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:33:52,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:52,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:33:52,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:33:52,188 INFO L87 Difference]: Start difference. First operand 1187 states and 1804 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:33:54,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:54,336 INFO L93 Difference]: Finished difference Result 2333 states and 3556 transitions. [2023-11-29 02:33:54,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 02:33:54,336 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 139 [2023-11-29 02:33:54,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:54,346 INFO L225 Difference]: With dead ends: 2333 [2023-11-29 02:33:54,346 INFO L226 Difference]: Without dead ends: 1843 [2023-11-29 02:33:54,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2023-11-29 02:33:54,349 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 562 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:54,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 877 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 02:33:54,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2023-11-29 02:33:54,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1765. [2023-11-29 02:33:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1426 states have (on average 1.490883590462833) internal successors, (2126), 1434 states have internal predecessors, (2126), 284 states have call successors, (284), 54 states have call predecessors, (284), 54 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2023-11-29 02:33:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 2694 transitions. [2023-11-29 02:33:54,643 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 2694 transitions. Word has length 139 [2023-11-29 02:33:54,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:54,644 INFO L495 AbstractCegarLoop]: Abstraction has 1765 states and 2694 transitions. [2023-11-29 02:33:54,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:33:54,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 2694 transitions. [2023-11-29 02:33:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 02:33:54,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:54,647 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:54,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:33:54,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:54,849 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:33:54,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:54,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1510524704, now seen corresponding path program 1 times [2023-11-29 02:33:54,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:54,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638159336] [2023-11-29 02:33:54,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:54,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:54,866 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:33:54,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793374318] [2023-11-29 02:33:54,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:54,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:54,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:54,867 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:54,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:33:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:54,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 02:33:54,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 02:34:00,612 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:34:00,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:34:00,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638159336] [2023-11-29 02:34:00,612 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:34:00,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793374318] [2023-11-29 02:34:00,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793374318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:34:00,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:34:00,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 02:34:00,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790763196] [2023-11-29 02:34:00,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:34:00,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:34:00,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:34:00,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:34:00,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:34:00,614 INFO L87 Difference]: Start difference. First operand 1765 states and 2694 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:34:07,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:34:07,727 INFO L93 Difference]: Finished difference Result 2581 states and 3938 transitions. [2023-11-29 02:34:07,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:34:07,728 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 139 [2023-11-29 02:34:07,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:34:07,736 INFO L225 Difference]: With dead ends: 2581 [2023-11-29 02:34:07,736 INFO L226 Difference]: Without dead ends: 1843 [2023-11-29 02:34:07,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:34:07,739 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 475 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:34:07,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 922 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-29 02:34:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2023-11-29 02:34:07,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1772. [2023-11-29 02:34:07,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1433 states have (on average 1.490579204466155) internal successors, (2136), 1441 states have internal predecessors, (2136), 284 states have call successors, (284), 54 states have call predecessors, (284), 54 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2023-11-29 02:34:07,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2704 transitions. [2023-11-29 02:34:07,981 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2704 transitions. Word has length 139 [2023-11-29 02:34:07,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:34:07,981 INFO L495 AbstractCegarLoop]: Abstraction has 1772 states and 2704 transitions. [2023-11-29 02:34:07,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:34:07,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2704 transitions. [2023-11-29 02:34:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 02:34:07,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:34:07,983 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:07,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:34:08,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:08,184 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:34:08,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:34:08,184 INFO L85 PathProgramCache]: Analyzing trace with hash 643919776, now seen corresponding path program 1 times [2023-11-29 02:34:08,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:34:08,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610999847] [2023-11-29 02:34:08,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:08,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:34:08,205 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:34:08,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022824807] [2023-11-29 02:34:08,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:08,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:08,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:34:08,206 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:34:08,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:34:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:34:08,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 02:34:08,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 159 proven. 51 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2023-11-29 02:34:09,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:34:33,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:34:33,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610999847] [2023-11-29 02:34:33,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:34:33,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022824807] [2023-11-29 02:34:33,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022824807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:34:33,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:34:33,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-29 02:34:33,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900768212] [2023-11-29 02:34:33,449 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:34:33,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:34:33,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:34:33,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:34:33,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=346, Unknown=3, NotChecked=0, Total=420 [2023-11-29 02:34:33,450 INFO L87 Difference]: Start difference. First operand 1772 states and 2704 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-29 02:34:36,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:34:36,439 INFO L93 Difference]: Finished difference Result 3258 states and 5012 transitions. [2023-11-29 02:34:36,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 02:34:36,440 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 139 [2023-11-29 02:34:36,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:34:36,448 INFO L225 Difference]: With dead ends: 3258 [2023-11-29 02:34:36,448 INFO L226 Difference]: Without dead ends: 1909 [2023-11-29 02:34:36,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=304, Invalid=1175, Unknown=3, NotChecked=0, Total=1482 [2023-11-29 02:34:36,451 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 358 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:34:36,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 655 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 02:34:36,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2023-11-29 02:34:36,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1831. [2023-11-29 02:34:36,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1492 states have (on average 1.4919571045576407) internal successors, (2226), 1500 states have internal predecessors, (2226), 284 states have call successors, (284), 54 states have call predecessors, (284), 54 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2023-11-29 02:34:36,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2794 transitions. [2023-11-29 02:34:36,632 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2794 transitions. Word has length 139 [2023-11-29 02:34:36,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:34:36,632 INFO L495 AbstractCegarLoop]: Abstraction has 1831 states and 2794 transitions. [2023-11-29 02:34:36,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-29 02:34:36,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2794 transitions. [2023-11-29 02:34:36,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 02:34:36,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:34:36,634 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:36,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:34:36,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 02:34:36,835 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:34:36,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:34:36,836 INFO L85 PathProgramCache]: Analyzing trace with hash 701178078, now seen corresponding path program 1 times [2023-11-29 02:34:36,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:34:36,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696482135] [2023-11-29 02:34:36,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:36,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:34:36,863 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:34:36,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334373047] [2023-11-29 02:34:36,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:36,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:36,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:34:36,865 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:34:36,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:34:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:34:36,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 02:34:36,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:44,409 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 02:34:44,409 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:34:44,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:34:44,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696482135] [2023-11-29 02:34:44,410 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:34:44,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334373047] [2023-11-29 02:34:44,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334373047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:34:44,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:34:44,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 02:34:44,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078489241] [2023-11-29 02:34:44,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:34:44,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:34:44,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:34:44,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:34:44,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:34:44,412 INFO L87 Difference]: Start difference. First operand 1831 states and 2794 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:34:53,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:34:53,878 INFO L93 Difference]: Finished difference Result 2659 states and 4056 transitions. [2023-11-29 02:34:53,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:34:53,879 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 139 [2023-11-29 02:34:53,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:34:53,887 INFO L225 Difference]: With dead ends: 2659 [2023-11-29 02:34:53,887 INFO L226 Difference]: Without dead ends: 1914 [2023-11-29 02:34:53,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:34:53,890 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 344 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:34:53,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 1027 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-11-29 02:34:53,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2023-11-29 02:34:54,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1829. [2023-11-29 02:34:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1490 states have (on average 1.4919463087248321) internal successors, (2223), 1498 states have internal predecessors, (2223), 284 states have call successors, (284), 54 states have call predecessors, (284), 54 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2023-11-29 02:34:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2791 transitions. [2023-11-29 02:34:54,138 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2791 transitions. Word has length 139 [2023-11-29 02:34:54,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:34:54,139 INFO L495 AbstractCegarLoop]: Abstraction has 1829 states and 2791 transitions. [2023-11-29 02:34:54,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:34:54,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2791 transitions. [2023-11-29 02:34:54,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 02:34:54,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:34:54,141 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:54,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:34:54,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 02:34:54,342 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:34:54,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:34:54,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1220104943, now seen corresponding path program 1 times [2023-11-29 02:34:54,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:34:54,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304858351] [2023-11-29 02:34:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:54,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:34:54,362 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:34:54,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662329731] [2023-11-29 02:34:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:54,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:54,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:34:54,363 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:34:54,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:34:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:34:55,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 02:34:55,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 408 proven. 81 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2023-11-29 02:34:56,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:35:04,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:04,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304858351] [2023-11-29 02:35:04,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:35:04,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662329731] [2023-11-29 02:35:04,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662329731] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:35:04,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:35:04,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-29 02:35:04,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048268820] [2023-11-29 02:35:04,323 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:35:04,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:35:04,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:04,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:35:04,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:35:04,325 INFO L87 Difference]: Start difference. First operand 1829 states and 2791 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 3 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2023-11-29 02:35:05,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:05,966 INFO L93 Difference]: Finished difference Result 3387 states and 5184 transitions. [2023-11-29 02:35:05,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 02:35:05,966 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 3 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 139 [2023-11-29 02:35:05,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:05,974 INFO L225 Difference]: With dead ends: 3387 [2023-11-29 02:35:05,975 INFO L226 Difference]: Without dead ends: 2010 [2023-11-29 02:35:05,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=285, Invalid=1121, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 02:35:05,978 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 362 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:05,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 629 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 02:35:05,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2023-11-29 02:35:06,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1888. [2023-11-29 02:35:06,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1549 states have (on average 1.4887023886378308) internal successors, (2306), 1557 states have internal predecessors, (2306), 284 states have call successors, (284), 54 states have call predecessors, (284), 54 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2023-11-29 02:35:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 2874 transitions. [2023-11-29 02:35:06,146 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 2874 transitions. Word has length 139 [2023-11-29 02:35:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:06,147 INFO L495 AbstractCegarLoop]: Abstraction has 1888 states and 2874 transitions. [2023-11-29 02:35:06,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 3 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2023-11-29 02:35:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 2874 transitions. [2023-11-29 02:35:06,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 02:35:06,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:06,148 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:35:06,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 02:35:06,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 02:35:06,349 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:35:06,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:06,349 INFO L85 PathProgramCache]: Analyzing trace with hash 173402724, now seen corresponding path program 1 times [2023-11-29 02:35:06,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:06,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831100410] [2023-11-29 02:35:06,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:06,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:06,366 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:35:06,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707097820] [2023-11-29 02:35:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:06,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:06,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:06,367 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:06,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:35:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:07,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:35:07,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 02:35:07,107 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:35:07,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:07,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831100410] [2023-11-29 02:35:07,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:35:07,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707097820] [2023-11-29 02:35:07,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707097820] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:35:07,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:35:07,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:35:07,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415370731] [2023-11-29 02:35:07,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:35:07,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:35:07,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:07,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:35:07,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:35:07,109 INFO L87 Difference]: Start difference. First operand 1888 states and 2874 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:35:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:07,449 INFO L93 Difference]: Finished difference Result 3267 states and 5020 transitions. [2023-11-29 02:35:07,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:35:07,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 139 [2023-11-29 02:35:07,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:07,457 INFO L225 Difference]: With dead ends: 3267 [2023-11-29 02:35:07,458 INFO L226 Difference]: Without dead ends: 1636 [2023-11-29 02:35:07,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 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 02:35:07,462 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 80 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:07,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 367 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:35:07,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2023-11-29 02:35:07,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1606. [2023-11-29 02:35:07,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1329 states have (on average 1.5063957863054929) internal successors, (2002), 1335 states have internal predecessors, (2002), 234 states have call successors, (234), 42 states have call predecessors, (234), 42 states have return successors, (234), 228 states have call predecessors, (234), 234 states have call successors, (234) [2023-11-29 02:35:07,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2470 transitions. [2023-11-29 02:35:07,598 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2470 transitions. Word has length 139 [2023-11-29 02:35:07,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:07,599 INFO L495 AbstractCegarLoop]: Abstraction has 1606 states and 2470 transitions. [2023-11-29 02:35:07,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:35:07,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2470 transitions. [2023-11-29 02:35:07,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 02:35:07,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:07,600 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:35:07,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:35:07,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 02:35:07,800 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:35:07,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:07,801 INFO L85 PathProgramCache]: Analyzing trace with hash -774873758, now seen corresponding path program 1 times [2023-11-29 02:35:07,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:07,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345636062] [2023-11-29 02:35:07,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:07,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:07,816 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:35:07,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272034021] [2023-11-29 02:35:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:07,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:07,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:07,817 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:07,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:35:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:08,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 02:35:08,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 402 proven. 108 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-11-29 02:35:13,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:35:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 02:35:31,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:31,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345636062] [2023-11-29 02:35:31,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:35:31,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272034021] [2023-11-29 02:35:31,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272034021] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:35:31,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:35:31,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [19] total 26 [2023-11-29 02:35:31,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364399058] [2023-11-29 02:35:31,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:35:31,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:35:31,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:31,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:35:31,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=520, Unknown=1, NotChecked=0, Total=650 [2023-11-29 02:35:31,181 INFO L87 Difference]: Start difference. First operand 1606 states and 2470 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:35:44,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 02:35:46,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 02:35:55,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:55,727 INFO L93 Difference]: Finished difference Result 3405 states and 5214 transitions. [2023-11-29 02:35:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 02:35:55,728 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 139 [2023-11-29 02:35:55,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:55,737 INFO L225 Difference]: With dead ends: 3405 [2023-11-29 02:35:55,737 INFO L226 Difference]: Without dead ends: 2056 [2023-11-29 02:35:55,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=203, Invalid=917, Unknown=2, NotChecked=0, Total=1122 [2023-11-29 02:35:55,740 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 340 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:55,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 555 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 320 Invalid, 1 Unknown, 0 Unchecked, 12.7s Time] [2023-11-29 02:35:55,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2023-11-29 02:35:55,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 1481. [2023-11-29 02:35:55,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1215 states have (on average 1.4641975308641975) internal successors, (1779), 1217 states have internal predecessors, (1779), 214 states have call successors, (214), 51 states have call predecessors, (214), 51 states have return successors, (214), 212 states have call predecessors, (214), 214 states have call successors, (214) [2023-11-29 02:35:55,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2207 transitions. [2023-11-29 02:35:55,892 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2207 transitions. Word has length 139 [2023-11-29 02:35:55,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:55,893 INFO L495 AbstractCegarLoop]: Abstraction has 1481 states and 2207 transitions. [2023-11-29 02:35:55,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:35:55,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2207 transitions. [2023-11-29 02:35:55,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 02:35:55,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:55,894 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:35:55,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 02:35:56,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 02:35:56,095 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:35:56,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:56,095 INFO L85 PathProgramCache]: Analyzing trace with hash -717615456, now seen corresponding path program 1 times [2023-11-29 02:35:56,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:56,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283861723] [2023-11-29 02:35:56,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:56,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:56,111 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:35:56,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973875528] [2023-11-29 02:35:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:56,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:56,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:56,112 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:56,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:35:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:56,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 02:35:56,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:36:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 02:36:01,596 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:36:01,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:36:01,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283861723] [2023-11-29 02:36:01,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:36:01,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973875528] [2023-11-29 02:36:01,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973875528] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:36:01,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:36:01,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 02:36:01,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407698755] [2023-11-29 02:36:01,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:36:01,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:36:01,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:36:01,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:36:01,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:36:01,599 INFO L87 Difference]: Start difference. First operand 1481 states and 2207 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:36:09,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:36:09,705 INFO L93 Difference]: Finished difference Result 2786 states and 4178 transitions. [2023-11-29 02:36:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:36:09,705 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 139 [2023-11-29 02:36:09,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:36:09,712 INFO L225 Difference]: With dead ends: 2786 [2023-11-29 02:36:09,712 INFO L226 Difference]: Without dead ends: 1582 [2023-11-29 02:36:09,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:36:09,715 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 386 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:36:09,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 730 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-29 02:36:09,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2023-11-29 02:36:09,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1484. [2023-11-29 02:36:09,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1218 states have (on average 1.4638752052545156) internal successors, (1783), 1220 states have internal predecessors, (1783), 214 states have call successors, (214), 51 states have call predecessors, (214), 51 states have return successors, (214), 212 states have call predecessors, (214), 214 states have call successors, (214) [2023-11-29 02:36:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2211 transitions. [2023-11-29 02:36:09,855 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2211 transitions. Word has length 139 [2023-11-29 02:36:09,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:36:09,855 INFO L495 AbstractCegarLoop]: Abstraction has 1484 states and 2211 transitions. [2023-11-29 02:36:09,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:36:09,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2211 transitions. [2023-11-29 02:36:09,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 02:36:09,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:36:09,857 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:36:09,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 02:36:10,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 02:36:10,058 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:36:10,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:36:10,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1526962082, now seen corresponding path program 1 times [2023-11-29 02:36:10,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:36:10,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501260159] [2023-11-29 02:36:10,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:10,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:36:10,075 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:36:10,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042908622] [2023-11-29 02:36:10,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:10,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:10,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:36:10,077 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:36:10,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:36:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:36:10,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 02:36:10,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:36:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 02:36:16,729 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:36:16,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:36:16,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501260159] [2023-11-29 02:36:16,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:36:16,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042908622] [2023-11-29 02:36:16,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042908622] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:36:16,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:36:16,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 02:36:16,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284271003] [2023-11-29 02:36:16,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:36:16,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:36:16,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:36:16,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:36:16,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:36:16,731 INFO L87 Difference]: Start difference. First operand 1484 states and 2211 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:36:24,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:36:24,894 INFO L93 Difference]: Finished difference Result 2784 states and 4174 transitions. [2023-11-29 02:36:24,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:36:24,895 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 139 [2023-11-29 02:36:24,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:36:24,901 INFO L225 Difference]: With dead ends: 2784 [2023-11-29 02:36:24,901 INFO L226 Difference]: Without dead ends: 1573 [2023-11-29 02:36:24,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:36:24,903 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 291 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:36:24,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 867 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-29 02:36:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2023-11-29 02:36:25,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1482. [2023-11-29 02:36:25,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1216 states have (on average 1.4638157894736843) internal successors, (1780), 1218 states have internal predecessors, (1780), 214 states have call successors, (214), 51 states have call predecessors, (214), 51 states have return successors, (214), 212 states have call predecessors, (214), 214 states have call successors, (214) [2023-11-29 02:36:25,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 2208 transitions. [2023-11-29 02:36:25,097 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 2208 transitions. Word has length 139 [2023-11-29 02:36:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:36:25,098 INFO L495 AbstractCegarLoop]: Abstraction has 1482 states and 2208 transitions. [2023-11-29 02:36:25,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:36:25,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 2208 transitions. [2023-11-29 02:36:25,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-29 02:36:25,099 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:36:25,099 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:36:25,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 02:36:25,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 02:36:25,300 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:36:25,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:36:25,300 INFO L85 PathProgramCache]: Analyzing trace with hash 692343688, now seen corresponding path program 1 times [2023-11-29 02:36:25,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:36:25,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823501315] [2023-11-29 02:36:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:25,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:36:25,316 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:36:25,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591019750] [2023-11-29 02:36:25,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:25,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:25,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:36:25,317 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:36:25,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 02:36:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:36:26,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 02:36:26,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:36:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 02:36:27,589 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:36:27,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:36:27,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823501315] [2023-11-29 02:36:27,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:36:27,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591019750] [2023-11-29 02:36:27,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591019750] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:36:27,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:36:27,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 02:36:27,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884964298] [2023-11-29 02:36:27,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:36:27,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 02:36:27,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:36:27,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 02:36:27,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:36:27,591 INFO L87 Difference]: Start difference. First operand 1482 states and 2208 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:36:28,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:36:28,874 INFO L93 Difference]: Finished difference Result 2094 states and 3104 transitions. [2023-11-29 02:36:28,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:36:28,875 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 140 [2023-11-29 02:36:28,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:36:28,882 INFO L225 Difference]: With dead ends: 2094 [2023-11-29 02:36:28,882 INFO L226 Difference]: Without dead ends: 1624 [2023-11-29 02:36:28,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:36:28,883 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 229 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:36:28,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 727 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 02:36:28,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2023-11-29 02:36:29,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1482. [2023-11-29 02:36:29,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1216 states have (on average 1.4638157894736843) internal successors, (1780), 1218 states have internal predecessors, (1780), 214 states have call successors, (214), 51 states have call predecessors, (214), 51 states have return successors, (214), 212 states have call predecessors, (214), 214 states have call successors, (214) [2023-11-29 02:36:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 2208 transitions. [2023-11-29 02:36:29,021 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 2208 transitions. Word has length 140 [2023-11-29 02:36:29,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:36:29,022 INFO L495 AbstractCegarLoop]: Abstraction has 1482 states and 2208 transitions. [2023-11-29 02:36:29,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:36:29,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 2208 transitions. [2023-11-29 02:36:29,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-29 02:36:29,024 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:36:29,024 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:36:29,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 02:36:29,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:36:29,224 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:36:29,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:36:29,225 INFO L85 PathProgramCache]: Analyzing trace with hash 749601990, now seen corresponding path program 1 times [2023-11-29 02:36:29,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:36:29,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495580001] [2023-11-29 02:36:29,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:29,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:36:29,240 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:36:29,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962005840] [2023-11-29 02:36:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:29,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:29,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:36:29,241 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:36:29,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 02:36:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:36:29,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 02:36:29,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:36:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 02:36:30,928 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:36:30,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:36:30,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495580001] [2023-11-29 02:36:30,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:36:30,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962005840] [2023-11-29 02:36:30,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962005840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:36:30,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:36:30,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 02:36:30,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184979446] [2023-11-29 02:36:30,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:36:30,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:36:30,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:36:30,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:36:30,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:36:30,930 INFO L87 Difference]: Start difference. First operand 1482 states and 2208 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:36:33,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:36:33,187 INFO L93 Difference]: Finished difference Result 2641 states and 3921 transitions. [2023-11-29 02:36:33,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 02:36:33,188 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 140 [2023-11-29 02:36:33,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:36:33,197 INFO L225 Difference]: With dead ends: 2641 [2023-11-29 02:36:33,197 INFO L226 Difference]: Without dead ends: 2145 [2023-11-29 02:36:33,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2023-11-29 02:36:33,199 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 530 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:36:33,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 1080 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 02:36:33,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2023-11-29 02:36:33,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1907. [2023-11-29 02:36:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1559 states have (on average 1.4611930724823605) internal successors, (2278), 1562 states have internal predecessors, (2278), 281 states have call successors, (281), 66 states have call predecessors, (281), 66 states have return successors, (281), 278 states have call predecessors, (281), 281 states have call successors, (281) [2023-11-29 02:36:33,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 2840 transitions. [2023-11-29 02:36:33,392 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 2840 transitions. Word has length 140 [2023-11-29 02:36:33,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:36:33,393 INFO L495 AbstractCegarLoop]: Abstraction has 1907 states and 2840 transitions. [2023-11-29 02:36:33,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:36:33,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 2840 transitions. [2023-11-29 02:36:33,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-29 02:36:33,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:36:33,394 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:36:33,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 02:36:33,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 02:36:33,595 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:36:33,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:36:33,595 INFO L85 PathProgramCache]: Analyzing trace with hash 339475464, now seen corresponding path program 1 times [2023-11-29 02:36:33,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:36:33,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408058889] [2023-11-29 02:36:33,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:33,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:36:33,613 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:36:33,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430440736] [2023-11-29 02:36:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:33,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:33,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:36:33,615 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:36:33,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 02:36:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:36:33,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 02:36:34,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:36:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 02:36:35,339 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:36:35,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:36:35,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408058889] [2023-11-29 02:36:35,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:36:35,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430440736] [2023-11-29 02:36:35,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430440736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:36:35,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:36:35,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 02:36:35,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083789285] [2023-11-29 02:36:35,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:36:35,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 02:36:35,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:36:35,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 02:36:35,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:36:35,342 INFO L87 Difference]: Start difference. First operand 1907 states and 2840 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:36:36,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:36:36,698 INFO L93 Difference]: Finished difference Result 2905 states and 4342 transitions. [2023-11-29 02:36:36,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:36:36,699 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 140 [2023-11-29 02:36:36,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:36:36,707 INFO L225 Difference]: With dead ends: 2905 [2023-11-29 02:36:36,707 INFO L226 Difference]: Without dead ends: 2070 [2023-11-29 02:36:36,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:36:36,710 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 197 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:36:36,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 581 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 02:36:36,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2023-11-29 02:36:36,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1907. [2023-11-29 02:36:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1559 states have (on average 1.4611930724823605) internal successors, (2278), 1562 states have internal predecessors, (2278), 281 states have call successors, (281), 66 states have call predecessors, (281), 66 states have return successors, (281), 278 states have call predecessors, (281), 281 states have call successors, (281) [2023-11-29 02:36:36,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 2840 transitions. [2023-11-29 02:36:36,897 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 2840 transitions. Word has length 140 [2023-11-29 02:36:36,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:36:36,897 INFO L495 AbstractCegarLoop]: Abstraction has 1907 states and 2840 transitions. [2023-11-29 02:36:36,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:36:36,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 2840 transitions. [2023-11-29 02:36:36,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-29 02:36:36,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:36:36,899 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:36:36,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 02:36:37,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:37,099 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:36:37,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:36:37,099 INFO L85 PathProgramCache]: Analyzing trace with hash 396733766, now seen corresponding path program 1 times [2023-11-29 02:36:37,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:36:37,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751305181] [2023-11-29 02:36:37,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:37,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:36:37,115 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:36:37,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908382251] [2023-11-29 02:36:37,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:37,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:37,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:36:37,117 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:36:37,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 02:36:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:36:37,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 02:36:37,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:36:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 02:36:38,857 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:36:38,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:36:38,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751305181] [2023-11-29 02:36:38,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:36:38,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908382251] [2023-11-29 02:36:38,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908382251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:36:38,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:36:38,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 02:36:38,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594995832] [2023-11-29 02:36:38,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:36:38,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:36:38,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:36:38,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:36:38,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:36:38,859 INFO L87 Difference]: Start difference. First operand 1907 states and 2840 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:36:40,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:36:40,824 INFO L93 Difference]: Finished difference Result 3776 states and 5657 transitions. [2023-11-29 02:36:40,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 02:36:40,825 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 140 [2023-11-29 02:36:40,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:36:40,832 INFO L225 Difference]: With dead ends: 3776 [2023-11-29 02:36:40,832 INFO L226 Difference]: Without dead ends: 2915 [2023-11-29 02:36:40,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2023-11-29 02:36:40,835 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 510 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:36:40,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 881 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 02:36:40,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2915 states. [2023-11-29 02:36:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2915 to 2248. [2023-11-29 02:36:41,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 1845 states have (on average 1.4617886178861788) internal successors, (2697), 1849 states have internal predecessors, (2697), 328 states have call successors, (328), 74 states have call predecessors, (328), 74 states have return successors, (328), 324 states have call predecessors, (328), 328 states have call successors, (328) [2023-11-29 02:36:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 3353 transitions. [2023-11-29 02:36:41,064 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 3353 transitions. Word has length 140 [2023-11-29 02:36:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:36:41,064 INFO L495 AbstractCegarLoop]: Abstraction has 2248 states and 3353 transitions. [2023-11-29 02:36:41,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:36:41,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 3353 transitions. [2023-11-29 02:36:41,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-29 02:36:41,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:36:41,066 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:36:41,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 02:36:41,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-11-29 02:36:41,266 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:36:41,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:36:41,267 INFO L85 PathProgramCache]: Analyzing trace with hash -506422507, now seen corresponding path program 1 times [2023-11-29 02:36:41,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:36:41,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612533514] [2023-11-29 02:36:41,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:41,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:36:41,282 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:36:41,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565185781] [2023-11-29 02:36:41,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:41,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:41,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:36:41,284 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:36:41,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 02:36:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:36:41,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:36:41,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:36:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 397 proven. 30 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2023-11-29 02:36:41,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:36:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2023-11-29 02:36:41,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:36:41,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612533514] [2023-11-29 02:36:41,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:36:41,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565185781] [2023-11-29 02:36:41,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565185781] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:36:41,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:36:41,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 02:36:41,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749514367] [2023-11-29 02:36:41,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:36:41,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 02:36:41,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:36:41,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 02:36:41,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:36:41,830 INFO L87 Difference]: Start difference. First operand 2248 states and 3353 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 4 states have call successors, (40), 3 states have call predecessors, (40), 5 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) [2023-11-29 02:36:44,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:36:44,977 INFO L93 Difference]: Finished difference Result 9471 states and 13793 transitions. [2023-11-29 02:36:44,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-29 02:36:44,978 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 4 states have call successors, (40), 3 states have call predecessors, (40), 5 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) Word has length 141 [2023-11-29 02:36:44,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:36:44,999 INFO L225 Difference]: With dead ends: 9471 [2023-11-29 02:36:44,999 INFO L226 Difference]: Without dead ends: 7850 [2023-11-29 02:36:45,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=879, Invalid=3281, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 02:36:45,006 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 1951 mSDsluCounter, 1539 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 847 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1963 SdHoareTripleChecker+Valid, 1722 SdHoareTripleChecker+Invalid, 2093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 847 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:36:45,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1963 Valid, 1722 Invalid, 2093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [847 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 02:36:45,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7850 states. [2023-11-29 02:36:45,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7850 to 3815. [2023-11-29 02:36:45,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3815 states, 3056 states have (on average 1.430955497382199) internal successors, (4373), 3074 states have internal predecessors, (4373), 606 states have call successors, (606), 152 states have call predecessors, (606), 152 states have return successors, (606), 588 states have call predecessors, (606), 606 states have call successors, (606) [2023-11-29 02:36:45,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3815 states to 3815 states and 5585 transitions. [2023-11-29 02:36:45,572 INFO L78 Accepts]: Start accepts. Automaton has 3815 states and 5585 transitions. Word has length 141 [2023-11-29 02:36:45,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:36:45,572 INFO L495 AbstractCegarLoop]: Abstraction has 3815 states and 5585 transitions. [2023-11-29 02:36:45,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 4 states have call successors, (40), 3 states have call predecessors, (40), 5 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) [2023-11-29 02:36:45,573 INFO L276 IsEmpty]: Start isEmpty. Operand 3815 states and 5585 transitions. [2023-11-29 02:36:45,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-29 02:36:45,574 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:36:45,575 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:36:45,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 02:36:45,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:45,775 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:36:45,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:36:45,776 INFO L85 PathProgramCache]: Analyzing trace with hash -432629745, now seen corresponding path program 1 times [2023-11-29 02:36:45,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:36:45,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092395634] [2023-11-29 02:36:45,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:45,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:36:45,796 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:36:45,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700686456] [2023-11-29 02:36:45,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:45,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:45,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:36:45,797 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:36:45,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 02:36:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:36:45,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 02:36:45,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:36:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 02:36:51,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:36:51,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:36:51,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092395634] [2023-11-29 02:36:51,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:36:51,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700686456] [2023-11-29 02:36:51,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700686456] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:36:51,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:36:51,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 02:36:51,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052084526] [2023-11-29 02:36:51,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:36:51,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:36:51,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:36:51,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:36:51,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:36:51,654 INFO L87 Difference]: Start difference. First operand 3815 states and 5585 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:37:03,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:37:03,289 INFO L93 Difference]: Finished difference Result 6172 states and 8998 transitions. [2023-11-29 02:37:03,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 02:37:03,290 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 141 [2023-11-29 02:37:03,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:37:03,299 INFO L225 Difference]: With dead ends: 6172 [2023-11-29 02:37:03,299 INFO L226 Difference]: Without dead ends: 4475 [2023-11-29 02:37:03,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 02:37:03,303 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 683 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:37:03,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 1111 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-29 02:37:03,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4475 states. [2023-11-29 02:37:03,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4475 to 3858. [2023-11-29 02:37:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3858 states, 3099 states have (on average 1.4317521781219749) internal successors, (4437), 3117 states have internal predecessors, (4437), 606 states have call successors, (606), 152 states have call predecessors, (606), 152 states have return successors, (606), 588 states have call predecessors, (606), 606 states have call successors, (606) [2023-11-29 02:37:03,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3858 states to 3858 states and 5649 transitions. [2023-11-29 02:37:03,785 INFO L78 Accepts]: Start accepts. Automaton has 3858 states and 5649 transitions. Word has length 141 [2023-11-29 02:37:03,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:37:03,785 INFO L495 AbstractCegarLoop]: Abstraction has 3858 states and 5649 transitions. [2023-11-29 02:37:03,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:37:03,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3858 states and 5649 transitions. [2023-11-29 02:37:03,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-29 02:37:03,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:37:03,787 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:37:03,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-29 02:37:03,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:03,987 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:37:03,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:03,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1299234673, now seen corresponding path program 1 times [2023-11-29 02:37:03,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:03,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251389089] [2023-11-29 02:37:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:03,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:04,005 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:37:04,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141108438] [2023-11-29 02:37:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:04,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:04,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:04,007 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:37:04,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 02:37:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:04,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 02:37:04,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 387 proven. 33 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2023-11-29 02:37:05,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:37:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2023-11-29 02:37:05,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:05,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251389089] [2023-11-29 02:37:05,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:37:05,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141108438] [2023-11-29 02:37:05,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141108438] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:37:05,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:37:05,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-11-29 02:37:05,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276939663] [2023-11-29 02:37:05,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:37:05,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:37:05,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:05,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:37:05,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:37:05,353 INFO L87 Difference]: Start difference. First operand 3858 states and 5649 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 4 states have call successors, (40), 3 states have call predecessors, (40), 5 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) [2023-11-29 02:37:07,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:37:07,915 INFO L93 Difference]: Finished difference Result 8907 states and 12991 transitions. [2023-11-29 02:37:07,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 02:37:07,915 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 4 states have call successors, (40), 3 states have call predecessors, (40), 5 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) Word has length 141 [2023-11-29 02:37:07,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:37:07,925 INFO L225 Difference]: With dead ends: 8907 [2023-11-29 02:37:07,925 INFO L226 Difference]: Without dead ends: 5227 [2023-11-29 02:37:07,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=712, Invalid=1544, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 02:37:07,931 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 984 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:37:07,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1002 Valid, 1365 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 02:37:07,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5227 states. [2023-11-29 02:37:08,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5227 to 3596. [2023-11-29 02:37:08,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3596 states, 2912 states have (on average 1.433379120879121) internal successors, (4174), 2925 states have internal predecessors, (4174), 541 states have call successors, (541), 142 states have call predecessors, (541), 142 states have return successors, (541), 528 states have call predecessors, (541), 541 states have call successors, (541) [2023-11-29 02:37:08,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3596 states to 3596 states and 5256 transitions. [2023-11-29 02:37:08,462 INFO L78 Accepts]: Start accepts. Automaton has 3596 states and 5256 transitions. Word has length 141 [2023-11-29 02:37:08,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:37:08,463 INFO L495 AbstractCegarLoop]: Abstraction has 3596 states and 5256 transitions. [2023-11-29 02:37:08,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 4 states have call successors, (40), 3 states have call predecessors, (40), 5 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) [2023-11-29 02:37:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3596 states and 5256 transitions. [2023-11-29 02:37:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-29 02:37:08,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:37:08,464 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:37:08,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-29 02:37:08,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:08,665 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:37:08,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:08,665 INFO L85 PathProgramCache]: Analyzing trace with hash 365655051, now seen corresponding path program 1 times [2023-11-29 02:37:08,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:08,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207311219] [2023-11-29 02:37:08,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:08,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:08,680 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:37:08,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474541884] [2023-11-29 02:37:08,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:08,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:08,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:08,681 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:37:08,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 02:37:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:09,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 02:37:09,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 02:37:09,723 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:37:09,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:09,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207311219] [2023-11-29 02:37:09,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:37:09,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474541884] [2023-11-29 02:37:09,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474541884] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:37:09,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:37:09,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:37:09,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061530373] [2023-11-29 02:37:09,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:37:09,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:37:09,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:09,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:37:09,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:37:09,725 INFO L87 Difference]: Start difference. First operand 3596 states and 5256 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:37:10,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:37:10,897 INFO L93 Difference]: Finished difference Result 7607 states and 11173 transitions. [2023-11-29 02:37:10,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:37:10,897 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 141 [2023-11-29 02:37:10,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:37:10,906 INFO L225 Difference]: With dead ends: 7607 [2023-11-29 02:37:10,906 INFO L226 Difference]: Without dead ends: 4727 [2023-11-29 02:37:10,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:37:10,911 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 281 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:37:10,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 751 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:37:10,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4727 states. [2023-11-29 02:37:11,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4727 to 4705. [2023-11-29 02:37:11,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4705 states, 3765 states have (on average 1.4393094289508632) internal successors, (5419), 3779 states have internal predecessors, (5419), 743 states have call successors, (743), 196 states have call predecessors, (743), 196 states have return successors, (743), 729 states have call predecessors, (743), 743 states have call successors, (743) [2023-11-29 02:37:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4705 states to 4705 states and 6905 transitions. [2023-11-29 02:37:11,594 INFO L78 Accepts]: Start accepts. Automaton has 4705 states and 6905 transitions. Word has length 141 [2023-11-29 02:37:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:37:11,595 INFO L495 AbstractCegarLoop]: Abstraction has 4705 states and 6905 transitions. [2023-11-29 02:37:11,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:37:11,595 INFO L276 IsEmpty]: Start isEmpty. Operand 4705 states and 6905 transitions. [2023-11-29 02:37:11,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-29 02:37:11,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:37:11,596 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:37:11,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 02:37:11,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:11,797 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:37:11,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:11,797 INFO L85 PathProgramCache]: Analyzing trace with hash -289592819, now seen corresponding path program 1 times [2023-11-29 02:37:11,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:11,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369425186] [2023-11-29 02:37:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:11,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:11,812 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:37:11,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532153361] [2023-11-29 02:37:11,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:11,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:11,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:11,814 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:37:11,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 02:37:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:11,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 02:37:11,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:38:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 02:38:03,836 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:38:03,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:38:03,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369425186] [2023-11-29 02:38:03,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:38:03,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532153361] [2023-11-29 02:38:03,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532153361] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:38:03,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:38:03,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-29 02:38:03,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779616662] [2023-11-29 02:38:03,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:38:03,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 02:38:03,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:38:03,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 02:38:03,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:38:03,838 INFO L87 Difference]: Start difference. First operand 4705 states and 6905 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:38:06,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:38:06,106 INFO L93 Difference]: Finished difference Result 4989 states and 7274 transitions. [2023-11-29 02:38:06,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 02:38:06,107 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 142 [2023-11-29 02:38:06,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:38:06,116 INFO L225 Difference]: With dead ends: 4989 [2023-11-29 02:38:06,116 INFO L226 Difference]: Without dead ends: 4987 [2023-11-29 02:38:06,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2023-11-29 02:38:06,118 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 395 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:38:06,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 835 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 02:38:06,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2023-11-29 02:38:06,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 4770. [2023-11-29 02:38:06,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4770 states, 3830 states have (on average 1.4386422976501305) internal successors, (5510), 3844 states have internal predecessors, (5510), 743 states have call successors, (743), 196 states have call predecessors, (743), 196 states have return successors, (743), 729 states have call predecessors, (743), 743 states have call successors, (743) [2023-11-29 02:38:06,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4770 states to 4770 states and 6996 transitions. [2023-11-29 02:38:06,721 INFO L78 Accepts]: Start accepts. Automaton has 4770 states and 6996 transitions. Word has length 142 [2023-11-29 02:38:06,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:38:06,721 INFO L495 AbstractCegarLoop]: Abstraction has 4770 states and 6996 transitions. [2023-11-29 02:38:06,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:38:06,722 INFO L276 IsEmpty]: Start isEmpty. Operand 4770 states and 6996 transitions. [2023-11-29 02:38:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-29 02:38:06,723 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:38:06,723 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:38:06,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 02:38:06,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:38:06,924 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:38:06,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:38:06,925 INFO L85 PathProgramCache]: Analyzing trace with hash -93539699, now seen corresponding path program 1 times [2023-11-29 02:38:06,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:38:06,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563946384] [2023-11-29 02:38:06,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:38:06,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:38:06,943 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:38:06,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689657889] [2023-11-29 02:38:06,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:38:06,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:38:06,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:38:06,944 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:38:06,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 02:38:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:38:07,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 02:38:07,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:42:15,685 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 02:42:15,685 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:42:15,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:42:15,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563946384] [2023-11-29 02:42:15,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:42:15,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689657889] [2023-11-29 02:42:15,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689657889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:42:15,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:42:15,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 02:42:15,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261971615] [2023-11-29 02:42:15,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:42:15,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:42:15,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:42:15,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:42:15,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:42:15,687 INFO L87 Difference]: Start difference. First operand 4770 states and 6996 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:42:17,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:42:17,334 INFO L93 Difference]: Finished difference Result 4992 states and 7277 transitions. [2023-11-29 02:42:17,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 02:42:17,335 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 142 [2023-11-29 02:42:17,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:42:17,341 INFO L225 Difference]: With dead ends: 4992 [2023-11-29 02:42:17,341 INFO L226 Difference]: Without dead ends: 4990 [2023-11-29 02:42:17,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2023-11-29 02:42:17,342 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 333 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:42:17,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 957 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 02:42:17,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4990 states. [2023-11-29 02:42:17,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4990 to 4833. [2023-11-29 02:42:17,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4833 states, 3893 states have (on average 1.4377087079373234) internal successors, (5597), 3907 states have internal predecessors, (5597), 743 states have call successors, (743), 196 states have call predecessors, (743), 196 states have return successors, (743), 729 states have call predecessors, (743), 743 states have call successors, (743) [2023-11-29 02:42:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4833 states to 4833 states and 7083 transitions. [2023-11-29 02:42:17,945 INFO L78 Accepts]: Start accepts. Automaton has 4833 states and 7083 transitions. Word has length 142 [2023-11-29 02:42:17,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:42:17,945 INFO L495 AbstractCegarLoop]: Abstraction has 4833 states and 7083 transitions. [2023-11-29 02:42:17,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-29 02:42:17,945 INFO L276 IsEmpty]: Start isEmpty. Operand 4833 states and 7083 transitions. [2023-11-29 02:42:17,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-29 02:42:17,946 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:42:17,946 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:42:17,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 02:42:18,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:42:18,147 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:42:18,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:42:18,148 INFO L85 PathProgramCache]: Analyzing trace with hash -100777305, now seen corresponding path program 1 times [2023-11-29 02:42:18,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:42:18,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442574888] [2023-11-29 02:42:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:42:18,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:42:18,176 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:42:18,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683976953] [2023-11-29 02:42:18,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:42:18,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:42:18,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:42:18,178 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:42:18,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687f3207-2167-4559-9330-72c25b44ea7a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 02:42:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:42:18,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 02:42:18,334 INFO L285 TraceCheckSpWp]: Computing forward predicates...