./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-69.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/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_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-69.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/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_1a361f4c-b44c-4020-8732-b3533dee5115/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 96d87045534f1cc5b0e028ec5065a5ac2be4d13286f56c464cccf7714dd6ef42 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:27:01,416 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:27:01,478 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:27:01,482 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:27:01,482 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:27:01,504 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:27:01,505 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:27:01,505 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:27:01,506 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:27:01,507 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:27:01,507 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:27:01,508 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:27:01,508 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:27:01,509 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:27:01,509 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:27:01,510 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:27:01,510 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:27:01,511 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:27:01,511 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:27:01,512 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:27:01,512 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:27:01,513 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:27:01,513 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:27:01,513 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:27:01,514 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:27:01,514 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:27:01,515 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:27:01,515 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:27:01,515 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:27:01,516 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:27:01,516 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:27:01,516 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:27:01,517 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:27:01,517 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:27:01,517 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:27:01,517 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:27:01,517 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:27:01,518 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:27:01,518 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:27:01,518 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:27:01,518 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:27:01,519 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:27:01,519 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_1a361f4c-b44c-4020-8732-b3533dee5115/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 96d87045534f1cc5b0e028ec5065a5ac2be4d13286f56c464cccf7714dd6ef42 [2023-11-29 04:27:01,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:27:01,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:27:01,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:27:01,738 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:27:01,738 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:27:01,739 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-69.i [2023-11-29 04:27:04,442 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:27:04,673 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:27:04,674 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-69.i [2023-11-29 04:27:04,688 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/data/25199c329/4eac260a2a0442749ca77e3924945367/FLAG35d0dda10 [2023-11-29 04:27:04,700 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/data/25199c329/4eac260a2a0442749ca77e3924945367 [2023-11-29 04:27:04,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:27:04,703 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:27:04,704 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:27:04,705 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:27:04,710 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:27:04,710 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:27:04" (1/1) ... [2023-11-29 04:27:04,712 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be23536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:27:04, skipping insertion in model container [2023-11-29 04:27:04,712 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:27:04" (1/1) ... [2023-11-29 04:27:04,768 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:27:04,891 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_1a361f4c-b44c-4020-8732-b3533dee5115/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-69.i[916,929] [2023-11-29 04:27:05,112 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:27:05,127 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:27:05,140 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_1a361f4c-b44c-4020-8732-b3533dee5115/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-69.i[916,929] [2023-11-29 04:27:05,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:27:05,265 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:27:05,265 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:27:05 WrapperNode [2023-11-29 04:27:05,265 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:27:05,266 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:27:05,267 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:27:05,267 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:27:05,274 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:27:05" (1/1) ... [2023-11-29 04:27:05,315 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:27:05" (1/1) ... [2023-11-29 04:27:05,403 INFO L138 Inliner]: procedures = 26, calls = 80, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 764 [2023-11-29 04:27:05,403 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:27:05,404 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:27:05,404 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:27:05,404 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:27:05,415 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:27:05" (1/1) ... [2023-11-29 04:27:05,415 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:27:05" (1/1) ... [2023-11-29 04:27:05,437 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:27:05" (1/1) ... [2023-11-29 04:27:05,477 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 04:27:05,478 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:27:05" (1/1) ... [2023-11-29 04:27:05,478 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:27:05" (1/1) ... [2023-11-29 04:27:05,508 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:27:05" (1/1) ... [2023-11-29 04:27:05,516 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:27:05" (1/1) ... [2023-11-29 04:27:05,533 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:27:05" (1/1) ... [2023-11-29 04:27:05,539 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:27:05" (1/1) ... [2023-11-29 04:27:05,567 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:27:05,567 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:27:05,568 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:27:05,568 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:27:05,568 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:27:05" (1/1) ... [2023-11-29 04:27:05,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:27:05,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:05,595 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:27:05,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:27:05,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:27:05,630 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 04:27:05,630 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 04:27:05,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:27:05,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:27:05,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:27:05,791 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:27:05,793 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:27:06,863 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:27:06,899 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:27:06,899 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 04:27:06,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:27:06 BoogieIcfgContainer [2023-11-29 04:27:06,900 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:27:06,902 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:27:06,902 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:27:06,905 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:27:06,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:27:04" (1/3) ... [2023-11-29 04:27:06,906 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a73ba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:27:06, skipping insertion in model container [2023-11-29 04:27:06,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:27:05" (2/3) ... [2023-11-29 04:27:06,906 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a73ba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:27:06, skipping insertion in model container [2023-11-29 04:27:06,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:27:06" (3/3) ... [2023-11-29 04:27:06,908 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-69.i [2023-11-29 04:27:06,927 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:27:06,927 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:27:06,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:27:06,990 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;@271d4a1e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:27:06,990 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 04:27:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand has 298 states, 228 states have (on average 1.6271929824561404) internal successors, (371), 229 states have internal predecessors, (371), 67 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2023-11-29 04:27:07,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-29 04:27:07,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:27:07,027 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:07,028 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:27:07,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:07,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1560602512, now seen corresponding path program 1 times [2023-11-29 04:27:07,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:07,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60158662] [2023-11-29 04:27:07,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:07,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:07,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:07,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60158662] [2023-11-29 04:27:07,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 04:27:07,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369706851] [2023-11-29 04:27:07,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:07,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:07,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:07,376 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:07,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:27:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:07,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 04:27:07,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 8712 trivial. 0 not checked. [2023-11-29 04:27:07,852 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:27:07,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369706851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:27:07,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:27:07,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:27:07,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928736719] [2023-11-29 04:27:07,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:27:07,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 04:27:07,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:07,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 04:27:07,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 04:27:07,894 INFO L87 Difference]: Start difference. First operand has 298 states, 228 states have (on average 1.6271929824561404) internal successors, (371), 229 states have internal predecessors, (371), 67 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) Second operand has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 2 states have call successors, (67), 2 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 2 states have call successors, (67) [2023-11-29 04:27:07,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:27:07,981 INFO L93 Difference]: Finished difference Result 593 states and 1075 transitions. [2023-11-29 04:27:07,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 04:27:07,984 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 2 states have call successors, (67), 2 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 2 states have call successors, (67) Word has length 457 [2023-11-29 04:27:07,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:27:07,993 INFO L225 Difference]: With dead ends: 593 [2023-11-29 04:27:07,993 INFO L226 Difference]: Without dead ends: 296 [2023-11-29 04:27:07,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 456 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 04:27:08,001 INFO L413 NwaCegarLoop]: 497 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, 497 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 04:27:08,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 497 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:27:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-11-29 04:27:08,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2023-11-29 04:27:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 227 states have (on average 1.6123348017621146) internal successors, (366), 227 states have internal predecessors, (366), 67 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2023-11-29 04:27:08,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 500 transitions. [2023-11-29 04:27:08,076 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 500 transitions. Word has length 457 [2023-11-29 04:27:08,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:27:08,076 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 500 transitions. [2023-11-29 04:27:08,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 2 states have call successors, (67), 2 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 2 states have call successors, (67) [2023-11-29 04:27:08,077 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 500 transitions. [2023-11-29 04:27:08,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-29 04:27:08,090 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:27:08,091 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:08,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:27:08,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 04:27:08,292 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:27:08,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:08,293 INFO L85 PathProgramCache]: Analyzing trace with hash -909721422, now seen corresponding path program 1 times [2023-11-29 04:27:08,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:08,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237623590] [2023-11-29 04:27:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:08,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:08,401 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:27:08,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099146699] [2023-11-29 04:27:08,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:08,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:08,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:08,406 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:08,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:27:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:08,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 04:27:08,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:27:08,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:27:08,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:08,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237623590] [2023-11-29 04:27:08,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:27:08,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099146699] [2023-11-29 04:27:08,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099146699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:27:08,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:27:08,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:27:08,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760987977] [2023-11-29 04:27:08,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:27:08,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:27:08,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:08,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:27:08,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:27:08,958 INFO L87 Difference]: Start difference. First operand 296 states and 500 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:09,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:27:09,104 INFO L93 Difference]: Finished difference Result 872 states and 1472 transitions. [2023-11-29 04:27:09,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:27:09,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 457 [2023-11-29 04:27:09,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:27:09,114 INFO L225 Difference]: With dead ends: 872 [2023-11-29 04:27:09,114 INFO L226 Difference]: Without dead ends: 577 [2023-11-29 04:27:09,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:27:09,117 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 451 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:27:09,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 1168 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:27:09,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2023-11-29 04:27:09,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2023-11-29 04:27:09,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 438 states have (on average 1.591324200913242) internal successors, (697), 438 states have internal predecessors, (697), 134 states have call successors, (134), 2 states have call predecessors, (134), 2 states have return successors, (134), 134 states have call predecessors, (134), 134 states have call successors, (134) [2023-11-29 04:27:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 965 transitions. [2023-11-29 04:27:09,190 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 965 transitions. Word has length 457 [2023-11-29 04:27:09,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:27:09,192 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 965 transitions. [2023-11-29 04:27:09,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:09,193 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 965 transitions. [2023-11-29 04:27:09,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-29 04:27:09,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:27:09,200 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:09,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:27:09,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 04:27:09,401 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:27:09,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:09,401 INFO L85 PathProgramCache]: Analyzing trace with hash 258049590, now seen corresponding path program 1 times [2023-11-29 04:27:09,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:09,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677999073] [2023-11-29 04:27:09,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:09,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:09,492 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:27:09,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135201256] [2023-11-29 04:27:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:09,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:09,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:09,494 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:09,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:27:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:09,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 04:27:09,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:10,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:27:10,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:27:10,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:10,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677999073] [2023-11-29 04:27:10,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:27:10,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135201256] [2023-11-29 04:27:10,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135201256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:27:10,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:27:10,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:27:10,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780775084] [2023-11-29 04:27:10,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:27:10,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:27:10,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:10,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:27:10,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:27:10,029 INFO L87 Difference]: Start difference. First operand 575 states and 965 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:27:10,180 INFO L93 Difference]: Finished difference Result 1152 states and 1932 transitions. [2023-11-29 04:27:10,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:27:10,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 457 [2023-11-29 04:27:10,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:27:10,186 INFO L225 Difference]: With dead ends: 1152 [2023-11-29 04:27:10,186 INFO L226 Difference]: Without dead ends: 578 [2023-11-29 04:27:10,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:27:10,188 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 419 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:27:10,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 1077 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:27:10,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2023-11-29 04:27:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 576. [2023-11-29 04:27:10,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 439 states have (on average 1.5763097949886105) internal successors, (692), 439 states have internal predecessors, (692), 134 states have call successors, (134), 2 states have call predecessors, (134), 2 states have return successors, (134), 134 states have call predecessors, (134), 134 states have call successors, (134) [2023-11-29 04:27:10,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 960 transitions. [2023-11-29 04:27:10,233 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 960 transitions. Word has length 457 [2023-11-29 04:27:10,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:27:10,235 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 960 transitions. [2023-11-29 04:27:10,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:10,236 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 960 transitions. [2023-11-29 04:27:10,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-29 04:27:10,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:27:10,240 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:10,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:27:10,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 04:27:10,441 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:27:10,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:10,442 INFO L85 PathProgramCache]: Analyzing trace with hash -2113689672, now seen corresponding path program 1 times [2023-11-29 04:27:10,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:10,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905373921] [2023-11-29 04:27:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:10,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:10,526 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:27:10,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551627178] [2023-11-29 04:27:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:10,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:10,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:10,528 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:10,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:27:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:10,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 1102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 04:27:10,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:27:10,995 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:27:10,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:10,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905373921] [2023-11-29 04:27:10,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:27:10,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551627178] [2023-11-29 04:27:10,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551627178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:27:10,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:27:10,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:27:10,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56026935] [2023-11-29 04:27:10,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:27:10,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:27:10,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:10,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:27:10,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:27:10,999 INFO L87 Difference]: Start difference. First operand 576 states and 960 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:11,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:27:11,152 INFO L93 Difference]: Finished difference Result 1720 states and 2868 transitions. [2023-11-29 04:27:11,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:27:11,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 457 [2023-11-29 04:27:11,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:27:11,162 INFO L225 Difference]: With dead ends: 1720 [2023-11-29 04:27:11,162 INFO L226 Difference]: Without dead ends: 1145 [2023-11-29 04:27:11,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:27:11,166 INFO L413 NwaCegarLoop]: 734 mSDtfsCounter, 452 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:27:11,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 1211 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:27:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2023-11-29 04:27:11,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 1137. [2023-11-29 04:27:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 864 states have (on average 1.5671296296296295) internal successors, (1354), 864 states have internal predecessors, (1354), 268 states have call successors, (268), 4 states have call predecessors, (268), 4 states have return successors, (268), 268 states have call predecessors, (268), 268 states have call successors, (268) [2023-11-29 04:27:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1890 transitions. [2023-11-29 04:27:11,289 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1890 transitions. Word has length 457 [2023-11-29 04:27:11,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:27:11,291 INFO L495 AbstractCegarLoop]: Abstraction has 1137 states and 1890 transitions. [2023-11-29 04:27:11,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:11,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1890 transitions. [2023-11-29 04:27:11,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-29 04:27:11,296 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:27:11,297 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:11,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 04:27:11,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:11,498 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:27:11,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:11,499 INFO L85 PathProgramCache]: Analyzing trace with hash -341422954, now seen corresponding path program 1 times [2023-11-29 04:27:11,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:11,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610021901] [2023-11-29 04:27:11,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:11,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:11,572 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:27:11,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779148083] [2023-11-29 04:27:11,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:11,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:11,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:11,574 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:11,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:27:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:11,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 1100 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:27:11,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:27:12,475 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:27:12,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:12,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610021901] [2023-11-29 04:27:12,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:27:12,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779148083] [2023-11-29 04:27:12,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779148083] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:27:12,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:27:12,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 04:27:12,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968878842] [2023-11-29 04:27:12,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:27:12,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:27:12,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:12,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:27:12,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:27:12,480 INFO L87 Difference]: Start difference. First operand 1137 states and 1890 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:12,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:27:12,978 INFO L93 Difference]: Finished difference Result 3443 states and 5743 transitions. [2023-11-29 04:27:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 04:27:12,979 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 457 [2023-11-29 04:27:12,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:27:12,996 INFO L225 Difference]: With dead ends: 3443 [2023-11-29 04:27:12,996 INFO L226 Difference]: Without dead ends: 2307 [2023-11-29 04:27:13,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:27:13,002 INFO L413 NwaCegarLoop]: 761 mSDtfsCounter, 1158 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 2776 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:27:13,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1158 Valid, 2776 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:27:13,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2023-11-29 04:27:13,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 1696. [2023-11-29 04:27:13,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1287 states have (on average 1.557109557109557) internal successors, (2004), 1287 states have internal predecessors, (2004), 402 states have call successors, (402), 6 states have call predecessors, (402), 6 states have return successors, (402), 402 states have call predecessors, (402), 402 states have call successors, (402) [2023-11-29 04:27:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2808 transitions. [2023-11-29 04:27:13,245 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2808 transitions. Word has length 457 [2023-11-29 04:27:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:27:13,246 INFO L495 AbstractCegarLoop]: Abstraction has 1696 states and 2808 transitions. [2023-11-29 04:27:13,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2808 transitions. [2023-11-29 04:27:13,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-29 04:27:13,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:27:13,252 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:13,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:27:13,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:13,453 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:27:13,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:13,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1045362456, now seen corresponding path program 1 times [2023-11-29 04:27:13,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:13,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225895990] [2023-11-29 04:27:13,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:13,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:13,521 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:27:13,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271202317] [2023-11-29 04:27:13,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:13,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:13,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:13,523 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:13,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:27:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:13,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:27:13,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:27:15,150 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:27:15,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:15,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225895990] [2023-11-29 04:27:15,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:27:15,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271202317] [2023-11-29 04:27:15,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271202317] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:27:15,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:27:15,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:27:15,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239617543] [2023-11-29 04:27:15,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:27:15,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:27:15,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:15,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:27:15,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:27:15,154 INFO L87 Difference]: Start difference. First operand 1696 states and 2808 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:15,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:27:15,905 INFO L93 Difference]: Finished difference Result 5570 states and 9249 transitions. [2023-11-29 04:27:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:27:15,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 457 [2023-11-29 04:27:15,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:27:15,926 INFO L225 Difference]: With dead ends: 5570 [2023-11-29 04:27:15,926 INFO L226 Difference]: Without dead ends: 3875 [2023-11-29 04:27:15,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:27:15,931 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 1094 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 04:27:15,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1094 Valid, 1645 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 04:27:15,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2023-11-29 04:27:16,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 2959. [2023-11-29 04:27:16,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2959 states, 2210 states have (on average 1.539819004524887) internal successors, (3403), 2210 states have internal predecessors, (3403), 737 states have call successors, (737), 11 states have call predecessors, (737), 11 states have return successors, (737), 737 states have call predecessors, (737), 737 states have call successors, (737) [2023-11-29 04:27:16,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2959 states to 2959 states and 4877 transitions. [2023-11-29 04:27:16,130 INFO L78 Accepts]: Start accepts. Automaton has 2959 states and 4877 transitions. Word has length 457 [2023-11-29 04:27:16,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:27:16,131 INFO L495 AbstractCegarLoop]: Abstraction has 2959 states and 4877 transitions. [2023-11-29 04:27:16,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:16,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2959 states and 4877 transitions. [2023-11-29 04:27:16,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-29 04:27:16,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:27:16,135 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:16,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 04:27:16,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:16,336 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:27:16,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:16,337 INFO L85 PathProgramCache]: Analyzing trace with hash -586895225, now seen corresponding path program 1 times [2023-11-29 04:27:16,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:16,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342098788] [2023-11-29 04:27:16,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:16,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:16,412 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:27:16,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309132653] [2023-11-29 04:27:16,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:16,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:16,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:16,414 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:16,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:27:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:16,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:27:16,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:16,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 2038 proven. 24 refuted. 0 times theorem prover too weak. 6782 trivial. 0 not checked. [2023-11-29 04:27:16,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:27:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 174 proven. 24 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-29 04:27:17,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:17,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342098788] [2023-11-29 04:27:17,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:27:17,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309132653] [2023-11-29 04:27:17,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309132653] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:27:17,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:27:17,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-29 04:27:17,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871428535] [2023-11-29 04:27:17,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:27:17,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:27:17,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:17,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:27:17,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:27:17,167 INFO L87 Difference]: Start difference. First operand 2959 states and 4877 transitions. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 2 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) [2023-11-29 04:27:18,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:27:18,375 INFO L93 Difference]: Finished difference Result 5852 states and 9596 transitions. [2023-11-29 04:27:18,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 04:27:18,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 2 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) Word has length 458 [2023-11-29 04:27:18,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:27:18,393 INFO L225 Difference]: With dead ends: 5852 [2023-11-29 04:27:18,393 INFO L226 Difference]: Without dead ends: 3027 [2023-11-29 04:27:18,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 925 GetRequests, 907 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:27:18,402 INFO L413 NwaCegarLoop]: 767 mSDtfsCounter, 1151 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 2404 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:27:18,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1210 Valid, 2404 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 04:27:18,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3027 states. [2023-11-29 04:27:18,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3027 to 2998. [2023-11-29 04:27:18,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2238 states have (on average 1.5254691689008042) internal successors, (3414), 2238 states have internal predecessors, (3414), 737 states have call successors, (737), 22 states have call predecessors, (737), 22 states have return successors, (737), 737 states have call predecessors, (737), 737 states have call successors, (737) [2023-11-29 04:27:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 4888 transitions. [2023-11-29 04:27:18,679 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 4888 transitions. Word has length 458 [2023-11-29 04:27:18,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:27:18,680 INFO L495 AbstractCegarLoop]: Abstraction has 2998 states and 4888 transitions. [2023-11-29 04:27:18,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 2 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) [2023-11-29 04:27:18,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 4888 transitions. [2023-11-29 04:27:18,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-29 04:27:18,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:27:18,684 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:18,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:27:18,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:18,885 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:27:18,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:18,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1147209225, now seen corresponding path program 1 times [2023-11-29 04:27:18,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:18,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363059446] [2023-11-29 04:27:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:18,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:18,950 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:27:18,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919432560] [2023-11-29 04:27:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:18,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:18,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:18,952 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:18,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:27:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:19,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:27:19,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:20,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:27:20,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:27:20,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:20,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363059446] [2023-11-29 04:27:20,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:27:20,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919432560] [2023-11-29 04:27:20,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919432560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:27:20,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:27:20,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:27:20,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540785574] [2023-11-29 04:27:20,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:27:20,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:27:20,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:20,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:27:20,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:27:20,421 INFO L87 Difference]: Start difference. First operand 2998 states and 4888 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:20,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:27:20,602 INFO L93 Difference]: Finished difference Result 4468 states and 7291 transitions. [2023-11-29 04:27:20,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:27:20,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 458 [2023-11-29 04:27:20,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:27:20,614 INFO L225 Difference]: With dead ends: 4468 [2023-11-29 04:27:20,614 INFO L226 Difference]: Without dead ends: 1606 [2023-11-29 04:27:20,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:27:20,621 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 596 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:27:20,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 951 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:27:20,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2023-11-29 04:27:20,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1600. [2023-11-29 04:27:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1185 states have (on average 1.5172995780590717) internal successors, (1798), 1185 states have internal predecessors, (1798), 402 states have call successors, (402), 12 states have call predecessors, (402), 12 states have return successors, (402), 402 states have call predecessors, (402), 402 states have call successors, (402) [2023-11-29 04:27:20,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2602 transitions. [2023-11-29 04:27:20,746 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2602 transitions. Word has length 458 [2023-11-29 04:27:20,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:27:20,746 INFO L495 AbstractCegarLoop]: Abstraction has 1600 states and 2602 transitions. [2023-11-29 04:27:20,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:20,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2602 transitions. [2023-11-29 04:27:20,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-29 04:27:20,749 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:27:20,750 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:20,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 04:27:20,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 04:27:20,951 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:27:20,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:20,952 INFO L85 PathProgramCache]: Analyzing trace with hash -894770414, now seen corresponding path program 1 times [2023-11-29 04:27:20,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:20,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256762215] [2023-11-29 04:27:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:20,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:21,013 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:27:21,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247230883] [2023-11-29 04:27:21,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:21,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:21,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:21,015 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:21,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:27:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:21,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:27:21,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 2418 proven. 30 refuted. 0 times theorem prover too weak. 6396 trivial. 0 not checked. [2023-11-29 04:27:21,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:27:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 168 proven. 30 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-29 04:27:21,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:21,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256762215] [2023-11-29 04:27:21,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:27:21,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247230883] [2023-11-29 04:27:21,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247230883] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:27:21,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:27:21,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-29 04:27:21,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868635970] [2023-11-29 04:27:21,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:27:21,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:27:21,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:21,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:27:21,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:27:21,738 INFO L87 Difference]: Start difference. First operand 1600 states and 2602 transitions. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 2 states have call successors, (77), 2 states have call predecessors, (77), 4 states have return successors, (78), 2 states have call predecessors, (78), 2 states have call successors, (78) [2023-11-29 04:27:22,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:27:22,900 INFO L93 Difference]: Finished difference Result 4602 states and 7448 transitions. [2023-11-29 04:27:22,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 04:27:22,901 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 2 states have call successors, (77), 2 states have call predecessors, (77), 4 states have return successors, (78), 2 states have call predecessors, (78), 2 states have call successors, (78) Word has length 463 [2023-11-29 04:27:22,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:27:22,918 INFO L225 Difference]: With dead ends: 4602 [2023-11-29 04:27:22,918 INFO L226 Difference]: Without dead ends: 3138 [2023-11-29 04:27:22,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 936 GetRequests, 917 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:27:22,922 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 1260 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 2506 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:27:22,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1373 Valid, 2506 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 04:27:22,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2023-11-29 04:27:23,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 1797. [2023-11-29 04:27:23,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1376 states have (on average 1.5232558139534884) internal successors, (2096), 1376 states have internal predecessors, (2096), 402 states have call successors, (402), 18 states have call predecessors, (402), 18 states have return successors, (402), 402 states have call predecessors, (402), 402 states have call successors, (402) [2023-11-29 04:27:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 2900 transitions. [2023-11-29 04:27:23,104 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 2900 transitions. Word has length 463 [2023-11-29 04:27:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:27:23,105 INFO L495 AbstractCegarLoop]: Abstraction has 1797 states and 2900 transitions. [2023-11-29 04:27:23,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 2 states have call successors, (77), 2 states have call predecessors, (77), 4 states have return successors, (78), 2 states have call predecessors, (78), 2 states have call successors, (78) [2023-11-29 04:27:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 2900 transitions. [2023-11-29 04:27:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-29 04:27:23,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:27:23,111 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:23,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 04:27:23,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 04:27:23,315 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:27:23,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:23,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1441622096, now seen corresponding path program 1 times [2023-11-29 04:27:23,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:23,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880614966] [2023-11-29 04:27:23,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:23,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:23,372 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:27:23,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834225398] [2023-11-29 04:27:23,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:23,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:23,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:23,374 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:23,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 04:27:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:23,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 04:27:23,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:27:23,835 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:27:23,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:23,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880614966] [2023-11-29 04:27:23,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:27:23,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834225398] [2023-11-29 04:27:23,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834225398] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:27:23,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:27:23,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:27:23,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780349254] [2023-11-29 04:27:23,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:27:23,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:27:23,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:23,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:27:23,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:27:23,838 INFO L87 Difference]: Start difference. First operand 1797 states and 2900 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:24,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:27:24,104 INFO L93 Difference]: Finished difference Result 4740 states and 7657 transitions. [2023-11-29 04:27:24,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:27:24,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 463 [2023-11-29 04:27:24,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:27:24,124 INFO L225 Difference]: With dead ends: 4740 [2023-11-29 04:27:24,124 INFO L226 Difference]: Without dead ends: 3101 [2023-11-29 04:27:24,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:27:24,128 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 421 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:27:24,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 1177 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:27:24,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2023-11-29 04:27:24,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 3099. [2023-11-29 04:27:24,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3099 states, 2328 states have (on average 1.5004295532646048) internal successors, (3493), 2328 states have internal predecessors, (3493), 737 states have call successors, (737), 33 states have call predecessors, (737), 33 states have return successors, (737), 737 states have call predecessors, (737), 737 states have call successors, (737) [2023-11-29 04:27:24,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3099 states to 3099 states and 4967 transitions. [2023-11-29 04:27:24,451 INFO L78 Accepts]: Start accepts. Automaton has 3099 states and 4967 transitions. Word has length 463 [2023-11-29 04:27:24,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:27:24,452 INFO L495 AbstractCegarLoop]: Abstraction has 3099 states and 4967 transitions. [2023-11-29 04:27:24,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3099 states and 4967 transitions. [2023-11-29 04:27:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-29 04:27:24,458 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:27:24,458 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:24,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 04:27:24,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 04:27:24,659 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:27:24,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:24,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1687167760, now seen corresponding path program 1 times [2023-11-29 04:27:24,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:24,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472018391] [2023-11-29 04:27:24,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:24,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:24,713 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:27:24,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980551038] [2023-11-29 04:27:24,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:24,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:24,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:24,715 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:24,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 04:27:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:25,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 04:27:25,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:27:26,131 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:27:26,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:26,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472018391] [2023-11-29 04:27:26,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:27:26,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980551038] [2023-11-29 04:27:26,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980551038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:27:26,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:27:26,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:27:26,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324726083] [2023-11-29 04:27:26,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:27:26,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:27:26,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:26,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:27:26,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:27:26,134 INFO L87 Difference]: Start difference. First operand 3099 states and 4967 transitions. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 7 states have internal predecessors, (131), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:28,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:27:28,714 INFO L93 Difference]: Finished difference Result 10530 states and 16947 transitions. [2023-11-29 04:27:28,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 04:27:28,715 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 7 states have internal predecessors, (131), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 463 [2023-11-29 04:27:28,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:27:28,753 INFO L225 Difference]: With dead ends: 10530 [2023-11-29 04:27:28,753 INFO L226 Difference]: Without dead ends: 8172 [2023-11-29 04:27:28,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-11-29 04:27:28,759 INFO L413 NwaCegarLoop]: 668 mSDtfsCounter, 3031 mSDsluCounter, 4242 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3031 SdHoareTripleChecker+Valid, 4910 SdHoareTripleChecker+Invalid, 2289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:27:28,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3031 Valid, 4910 Invalid, 2289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 1582 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 04:27:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8172 states. [2023-11-29 04:27:29,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8172 to 4952. [2023-11-29 04:27:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4952 states, 3838 states have (on average 1.5278791036998436) internal successors, (5864), 3844 states have internal predecessors, (5864), 1073 states have call successors, (1073), 40 states have call predecessors, (1073), 40 states have return successors, (1073), 1067 states have call predecessors, (1073), 1073 states have call successors, (1073) [2023-11-29 04:27:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4952 states to 4952 states and 8010 transitions. [2023-11-29 04:27:29,493 INFO L78 Accepts]: Start accepts. Automaton has 4952 states and 8010 transitions. Word has length 463 [2023-11-29 04:27:29,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:27:29,494 INFO L495 AbstractCegarLoop]: Abstraction has 4952 states and 8010 transitions. [2023-11-29 04:27:29,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 7 states have internal predecessors, (131), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:29,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4952 states and 8010 transitions. [2023-11-29 04:27:29,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-29 04:27:29,500 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:27:29,500 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:29,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 04:27:29,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 04:27:29,709 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:27:29,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:29,709 INFO L85 PathProgramCache]: Analyzing trace with hash 600460466, now seen corresponding path program 1 times [2023-11-29 04:27:29,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:29,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504437395] [2023-11-29 04:27:29,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:29,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:29,775 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:27:29,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847195196] [2023-11-29 04:27:29,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:29,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:29,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:29,776 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:29,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 04:27:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:30,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 04:27:30,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:27:30,601 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:27:30,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:30,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504437395] [2023-11-29 04:27:30,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:27:30,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847195196] [2023-11-29 04:27:30,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847195196] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:27:30,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:27:30,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:27:30,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603773395] [2023-11-29 04:27:30,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:27:30,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:27:30,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:30,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:27:30,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:27:30,603 INFO L87 Difference]: Start difference. First operand 4952 states and 8010 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:31,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:27:31,183 INFO L93 Difference]: Finished difference Result 14532 states and 23542 transitions. [2023-11-29 04:27:31,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:27:31,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 463 [2023-11-29 04:27:31,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:27:31,210 INFO L225 Difference]: With dead ends: 14532 [2023-11-29 04:27:31,210 INFO L226 Difference]: Without dead ends: 9742 [2023-11-29 04:27:31,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:27:31,219 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 240 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:27:31,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 953 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:27:31,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9742 states. [2023-11-29 04:27:32,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9742 to 9722. [2023-11-29 04:27:32,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9722 states, 7566 states have (on average 1.5261697065820776) internal successors, (11547), 7578 states have internal predecessors, (11547), 2079 states have call successors, (2079), 76 states have call predecessors, (2079), 76 states have return successors, (2079), 2067 states have call predecessors, (2079), 2079 states have call successors, (2079) [2023-11-29 04:27:32,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9722 states to 9722 states and 15705 transitions. [2023-11-29 04:27:32,292 INFO L78 Accepts]: Start accepts. Automaton has 9722 states and 15705 transitions. Word has length 463 [2023-11-29 04:27:32,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:27:32,293 INFO L495 AbstractCegarLoop]: Abstraction has 9722 states and 15705 transitions. [2023-11-29 04:27:32,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:32,293 INFO L276 IsEmpty]: Start isEmpty. Operand 9722 states and 15705 transitions. [2023-11-29 04:27:32,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-29 04:27:32,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:27:32,300 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:32,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 04:27:32,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:32,501 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:27:32,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:32,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1023162292, now seen corresponding path program 1 times [2023-11-29 04:27:32,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:32,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748800954] [2023-11-29 04:27:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:32,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:32,567 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:27:32,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12301162] [2023-11-29 04:27:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:32,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:32,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:32,569 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:32,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 04:27:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:33,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:27:33,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 3120 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-29 04:27:34,040 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:27:34,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:34,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748800954] [2023-11-29 04:27:34,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:27:34,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12301162] [2023-11-29 04:27:34,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12301162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:27:34,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:27:34,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:27:34,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235248747] [2023-11-29 04:27:34,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:27:34,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:27:34,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:34,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:27:34,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:27:34,044 INFO L87 Difference]: Start difference. First operand 9722 states and 15705 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 2 states have call successors, (67), 2 states have call predecessors, (67), 2 states have return successors, (67), 2 states have call predecessors, (67), 2 states have call successors, (67) [2023-11-29 04:27:35,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:27:35,708 INFO L93 Difference]: Finished difference Result 22652 states and 36531 transitions. [2023-11-29 04:27:35,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 04:27:35,709 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 2 states have call successors, (67), 2 states have call predecessors, (67), 2 states have return successors, (67), 2 states have call predecessors, (67), 2 states have call successors, (67) Word has length 463 [2023-11-29 04:27:35,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:27:35,736 INFO L225 Difference]: With dead ends: 22652 [2023-11-29 04:27:35,736 INFO L226 Difference]: Without dead ends: 13092 [2023-11-29 04:27:35,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:27:35,754 INFO L413 NwaCegarLoop]: 861 mSDtfsCounter, 1463 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1463 SdHoareTripleChecker+Valid, 2854 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:27:35,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1463 Valid, 2854 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 04:27:35,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13092 states. [2023-11-29 04:27:36,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13092 to 11406. [2023-11-29 04:27:36,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11406 states, 9250 states have (on average 1.5564324324324323) internal successors, (14397), 9262 states have internal predecessors, (14397), 2079 states have call successors, (2079), 76 states have call predecessors, (2079), 76 states have return successors, (2079), 2067 states have call predecessors, (2079), 2079 states have call successors, (2079) [2023-11-29 04:27:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11406 states to 11406 states and 18555 transitions. [2023-11-29 04:27:36,887 INFO L78 Accepts]: Start accepts. Automaton has 11406 states and 18555 transitions. Word has length 463 [2023-11-29 04:27:36,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:27:36,888 INFO L495 AbstractCegarLoop]: Abstraction has 11406 states and 18555 transitions. [2023-11-29 04:27:36,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 2 states have call successors, (67), 2 states have call predecessors, (67), 2 states have return successors, (67), 2 states have call predecessors, (67), 2 states have call successors, (67) [2023-11-29 04:27:36,888 INFO L276 IsEmpty]: Start isEmpty. Operand 11406 states and 18555 transitions. [2023-11-29 04:27:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-29 04:27:36,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:27:36,894 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:36,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 04:27:37,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:37,095 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:27:37,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:37,095 INFO L85 PathProgramCache]: Analyzing trace with hash -368297371, now seen corresponding path program 1 times [2023-11-29 04:27:37,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:37,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512993826] [2023-11-29 04:27:37,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:37,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:37,149 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:27:37,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582319809] [2023-11-29 04:27:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:37,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:37,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:37,151 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:37,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 04:27:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:37,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 04:27:37,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:27:38,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:27:38,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:38,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512993826] [2023-11-29 04:27:38,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:27:38,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582319809] [2023-11-29 04:27:38,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582319809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:27:38,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:27:38,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:27:38,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659071765] [2023-11-29 04:27:38,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:27:38,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:27:38,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:38,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:27:38,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:27:38,137 INFO L87 Difference]: Start difference. First operand 11406 states and 18555 transitions. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 7 states have internal predecessors, (132), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:27:41,045 INFO L93 Difference]: Finished difference Result 43275 states and 70443 transitions. [2023-11-29 04:27:41,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 04:27:41,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 7 states have internal predecessors, (132), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 464 [2023-11-29 04:27:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:27:41,099 INFO L225 Difference]: With dead ends: 43275 [2023-11-29 04:27:41,099 INFO L226 Difference]: Without dead ends: 36630 [2023-11-29 04:27:41,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:27:41,114 INFO L413 NwaCegarLoop]: 806 mSDtfsCounter, 4184 mSDsluCounter, 4258 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 639 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4184 SdHoareTripleChecker+Valid, 5064 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 639 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:27:41,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4184 Valid, 5064 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [639 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 04:27:41,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36630 states. [2023-11-29 04:27:42,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36630 to 14069. [2023-11-29 04:27:42,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14069 states, 11225 states have (on average 1.5374610244988864) internal successors, (17258), 11239 states have internal predecessors, (17258), 2727 states have call successors, (2727), 116 states have call predecessors, (2727), 116 states have return successors, (2727), 2713 states have call predecessors, (2727), 2727 states have call successors, (2727) [2023-11-29 04:27:42,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14069 states to 14069 states and 22712 transitions. [2023-11-29 04:27:42,711 INFO L78 Accepts]: Start accepts. Automaton has 14069 states and 22712 transitions. Word has length 464 [2023-11-29 04:27:42,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:27:42,711 INFO L495 AbstractCegarLoop]: Abstraction has 14069 states and 22712 transitions. [2023-11-29 04:27:42,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 7 states have internal predecessors, (132), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:27:42,712 INFO L276 IsEmpty]: Start isEmpty. Operand 14069 states and 22712 transitions. [2023-11-29 04:27:42,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-29 04:27:42,718 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:27:42,718 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:42,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 04:27:42,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 04:27:42,919 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:27:42,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:42,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1455004665, now seen corresponding path program 1 times [2023-11-29 04:27:42,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:42,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865733311] [2023-11-29 04:27:42,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:42,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:42,975 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:27:42,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866384425] [2023-11-29 04:27:42,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:42,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:42,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:42,976 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:42,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 04:27:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:43,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:27:43,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 2596 proven. 33 refuted. 0 times theorem prover too weak. 6215 trivial. 0 not checked. [2023-11-29 04:27:43,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:27:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 165 proven. 33 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-29 04:27:43,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:43,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865733311] [2023-11-29 04:27:43,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:27:43,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866384425] [2023-11-29 04:27:43,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866384425] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:27:43,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:27:43,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-29 04:27:43,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758541110] [2023-11-29 04:27:43,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:27:43,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 04:27:43,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:43,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 04:27:43,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:27:43,791 INFO L87 Difference]: Start difference. First operand 14069 states and 22712 transitions. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 2 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2023-11-29 04:27:45,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:27:45,895 INFO L93 Difference]: Finished difference Result 28384 states and 45587 transitions. [2023-11-29 04:27:45,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 04:27:45,896 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 2 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) Word has length 464 [2023-11-29 04:27:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:27:45,929 INFO L225 Difference]: With dead ends: 28384 [2023-11-29 04:27:45,929 INFO L226 Difference]: Without dead ends: 14459 [2023-11-29 04:27:45,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 940 GetRequests, 917 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2023-11-29 04:27:45,952 INFO L413 NwaCegarLoop]: 804 mSDtfsCounter, 1230 mSDsluCounter, 2238 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 04:27:45,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1286 Valid, 3042 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 04:27:45,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14459 states. [2023-11-29 04:27:47,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14459 to 14151. [2023-11-29 04:27:47,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14151 states, 11306 states have (on average 1.531664602865735) internal successors, (17317), 11320 states have internal predecessors, (17317), 2699 states have call successors, (2699), 145 states have call predecessors, (2699), 145 states have return successors, (2699), 2685 states have call predecessors, (2699), 2699 states have call successors, (2699) [2023-11-29 04:27:47,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 22715 transitions. [2023-11-29 04:27:47,067 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 22715 transitions. Word has length 464 [2023-11-29 04:27:47,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:27:47,068 INFO L495 AbstractCegarLoop]: Abstraction has 14151 states and 22715 transitions. [2023-11-29 04:27:47,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 2 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2023-11-29 04:27:47,068 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 22715 transitions. [2023-11-29 04:27:47,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-29 04:27:47,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:27:47,074 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:47,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 04:27:47,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 04:27:47,275 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:27:47,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:47,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2107995205, now seen corresponding path program 1 times [2023-11-29 04:27:47,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:47,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589054817] [2023-11-29 04:27:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:47,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:47,320 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:27:47,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113328818] [2023-11-29 04:27:47,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:47,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:47,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:47,321 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:47,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 04:27:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:47,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 04:27:47,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 1626 proven. 18 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2023-11-29 04:27:48,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:27:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 180 proven. 18 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-29 04:27:48,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:48,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589054817] [2023-11-29 04:27:48,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:27:48,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113328818] [2023-11-29 04:27:48,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113328818] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:27:48,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:27:48,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2023-11-29 04:27:48,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035593980] [2023-11-29 04:27:48,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:27:48,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 04:27:48,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:48,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 04:27:48,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:27:48,673 INFO L87 Difference]: Start difference. First operand 14151 states and 22715 transitions. Second operand has 19 states, 19 states have (on average 9.947368421052632) internal successors, (189), 19 states have internal predecessors, (189), 4 states have call successors, (134), 3 states have call predecessors, (134), 5 states have return successors, (134), 4 states have call predecessors, (134), 4 states have call successors, (134) [2023-11-29 04:27:58,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:27:58,184 INFO L93 Difference]: Finished difference Result 51395 states and 82628 transitions. [2023-11-29 04:27:58,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-29 04:27:58,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 9.947368421052632) internal successors, (189), 19 states have internal predecessors, (189), 4 states have call successors, (134), 3 states have call predecessors, (134), 5 states have return successors, (134), 4 states have call predecessors, (134), 4 states have call successors, (134) Word has length 464 [2023-11-29 04:27:58,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:27:58,253 INFO L225 Difference]: With dead ends: 51395 [2023-11-29 04:27:58,253 INFO L226 Difference]: Without dead ends: 36902 [2023-11-29 04:27:58,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 997 GetRequests, 920 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1418, Invalid=4744, Unknown=0, NotChecked=0, Total=6162 [2023-11-29 04:27:58,277 INFO L413 NwaCegarLoop]: 748 mSDtfsCounter, 10630 mSDsluCounter, 6921 mSDsCounter, 0 mSdLazyCounter, 3115 mSolverCounterSat, 3330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10749 SdHoareTripleChecker+Valid, 7669 SdHoareTripleChecker+Invalid, 6445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3330 IncrementalHoareTripleChecker+Valid, 3115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:27:58,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10749 Valid, 7669 Invalid, 6445 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3330 Valid, 3115 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-29 04:27:58,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36902 states. [2023-11-29 04:27:59,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36902 to 20802. [2023-11-29 04:27:59,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20802 states, 17276 states have (on average 1.5612989117851355) internal successors, (26973), 17310 states have internal predecessors, (26973), 3327 states have call successors, (3327), 198 states have call predecessors, (3327), 198 states have return successors, (3327), 3293 states have call predecessors, (3327), 3327 states have call successors, (3327) [2023-11-29 04:27:59,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20802 states to 20802 states and 33627 transitions. [2023-11-29 04:27:59,992 INFO L78 Accepts]: Start accepts. Automaton has 20802 states and 33627 transitions. Word has length 464 [2023-11-29 04:27:59,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:27:59,993 INFO L495 AbstractCegarLoop]: Abstraction has 20802 states and 33627 transitions. [2023-11-29 04:27:59,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.947368421052632) internal successors, (189), 19 states have internal predecessors, (189), 4 states have call successors, (134), 3 states have call predecessors, (134), 5 states have return successors, (134), 4 states have call predecessors, (134), 4 states have call successors, (134) [2023-11-29 04:27:59,993 INFO L276 IsEmpty]: Start isEmpty. Operand 20802 states and 33627 transitions. [2023-11-29 04:27:59,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-29 04:27:59,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:27:59,997 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:28:00,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 04:28:00,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:00,198 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:28:00,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:00,198 INFO L85 PathProgramCache]: Analyzing trace with hash -616414432, now seen corresponding path program 1 times [2023-11-29 04:28:00,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:00,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078775220] [2023-11-29 04:28:00,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:00,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:00,243 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:28:00,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168236011] [2023-11-29 04:28:00,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:00,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:00,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:00,245 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:00,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 04:28:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:00,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:28:00,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 66 proven. 198 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-29 04:28:01,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:28:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:28:02,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:02,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078775220] [2023-11-29 04:28:02,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:28:02,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168236011] [2023-11-29 04:28:02,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168236011] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:28:02,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:28:02,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2023-11-29 04:28:02,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058510996] [2023-11-29 04:28:02,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:28:02,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:28:02,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:02,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:28:02,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-29 04:28:02,727 INFO L87 Difference]: Start difference. First operand 20802 states and 33627 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:28:04,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:28:04,454 INFO L93 Difference]: Finished difference Result 42220 states and 68193 transitions. [2023-11-29 04:28:04,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:28:04,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 464 [2023-11-29 04:28:04,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:28:04,491 INFO L225 Difference]: With dead ends: 42220 [2023-11-29 04:28:04,491 INFO L226 Difference]: Without dead ends: 21574 [2023-11-29 04:28:04,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 918 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:28:04,518 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 524 mSDsluCounter, 1669 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 2316 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:28:04,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 2316 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 04:28:04,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21574 states. [2023-11-29 04:28:06,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21574 to 16615. [2023-11-29 04:28:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16615 states, 13089 states have (on average 1.517610207044083) internal successors, (19864), 13123 states have internal predecessors, (19864), 3327 states have call successors, (3327), 198 states have call predecessors, (3327), 198 states have return successors, (3327), 3293 states have call predecessors, (3327), 3327 states have call successors, (3327) [2023-11-29 04:28:06,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16615 states to 16615 states and 26518 transitions. [2023-11-29 04:28:06,296 INFO L78 Accepts]: Start accepts. Automaton has 16615 states and 26518 transitions. Word has length 464 [2023-11-29 04:28:06,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:28:06,297 INFO L495 AbstractCegarLoop]: Abstraction has 16615 states and 26518 transitions. [2023-11-29 04:28:06,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:28:06,297 INFO L276 IsEmpty]: Start isEmpty. Operand 16615 states and 26518 transitions. [2023-11-29 04:28:06,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2023-11-29 04:28:06,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:28:06,300 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:28:06,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 04:28:06,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 04:28:06,501 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:28:06,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:06,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1112156103, now seen corresponding path program 1 times [2023-11-29 04:28:06,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:06,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917331100] [2023-11-29 04:28:06,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:06,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:06,556 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:28:06,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173367203] [2023-11-29 04:28:06,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:06,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:06,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:06,558 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:06,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 04:28:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:07,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:28:07,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 4701 proven. 126 refuted. 0 times theorem prover too weak. 4017 trivial. 0 not checked. [2023-11-29 04:28:07,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:28:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 72 proven. 126 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-29 04:28:09,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:09,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917331100] [2023-11-29 04:28:09,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:28:09,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173367203] [2023-11-29 04:28:09,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173367203] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:28:09,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:28:09,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-29 04:28:09,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027925594] [2023-11-29 04:28:09,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:28:09,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:28:09,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:09,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:28:09,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:28:09,488 INFO L87 Difference]: Start difference. First operand 16615 states and 26518 transitions. Second operand has 16 states, 16 states have (on average 14.5) internal successors, (232), 16 states have internal predecessors, (232), 5 states have call successors, (119), 3 states have call predecessors, (119), 5 states have return successors, (119), 5 states have call predecessors, (119), 5 states have call successors, (119) [2023-11-29 04:28:15,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:28:15,069 INFO L93 Difference]: Finished difference Result 64763 states and 102183 transitions. [2023-11-29 04:28:15,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 04:28:15,069 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 14.5) internal successors, (232), 16 states have internal predecessors, (232), 5 states have call successors, (119), 3 states have call predecessors, (119), 5 states have return successors, (119), 5 states have call predecessors, (119), 5 states have call successors, (119) Word has length 466 [2023-11-29 04:28:15,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:28:15,121 INFO L225 Difference]: With dead ends: 64763 [2023-11-29 04:28:15,121 INFO L226 Difference]: Without dead ends: 48304 [2023-11-29 04:28:15,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 965 GetRequests, 919 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=573, Invalid=1683, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 04:28:15,140 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 2642 mSDsluCounter, 2852 mSDsCounter, 0 mSdLazyCounter, 1843 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2643 SdHoareTripleChecker+Valid, 3370 SdHoareTripleChecker+Invalid, 2159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 1843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 04:28:15,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2643 Valid, 3370 Invalid, 2159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 1843 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 04:28:15,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48304 states. [2023-11-29 04:28:17,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48304 to 26696. [2023-11-29 04:28:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26696 states, 22952 states have (on average 1.54897176716626) internal successors, (35552), 23040 states have internal predecessors, (35552), 3381 states have call successors, (3381), 362 states have call predecessors, (3381), 362 states have return successors, (3381), 3293 states have call predecessors, (3381), 3381 states have call successors, (3381) [2023-11-29 04:28:17,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26696 states to 26696 states and 42314 transitions. [2023-11-29 04:28:17,235 INFO L78 Accepts]: Start accepts. Automaton has 26696 states and 42314 transitions. Word has length 466 [2023-11-29 04:28:17,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:28:17,236 INFO L495 AbstractCegarLoop]: Abstraction has 26696 states and 42314 transitions. [2023-11-29 04:28:17,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.5) internal successors, (232), 16 states have internal predecessors, (232), 5 states have call successors, (119), 3 states have call predecessors, (119), 5 states have return successors, (119), 5 states have call predecessors, (119), 5 states have call successors, (119) [2023-11-29 04:28:17,236 INFO L276 IsEmpty]: Start isEmpty. Operand 26696 states and 42314 transitions. [2023-11-29 04:28:17,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-11-29 04:28:17,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:28:17,240 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:28:17,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 04:28:17,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 04:28:17,441 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:28:17,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:17,442 INFO L85 PathProgramCache]: Analyzing trace with hash 920716621, now seen corresponding path program 1 times [2023-11-29 04:28:17,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:17,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332900457] [2023-11-29 04:28:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:17,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:17,486 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:28:17,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236901426] [2023-11-29 04:28:17,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:17,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:17,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:17,487 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:17,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 04:28:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:18,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 04:28:18,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 4044 proven. 321 refuted. 0 times theorem prover too weak. 4479 trivial. 0 not checked. [2023-11-29 04:28:19,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:28:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 69 proven. 324 refuted. 0 times theorem prover too weak. 8451 trivial. 0 not checked. [2023-11-29 04:28:20,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:20,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332900457] [2023-11-29 04:28:20,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:28:20,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236901426] [2023-11-29 04:28:20,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236901426] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:28:20,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:28:20,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-29 04:28:20,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729773078] [2023-11-29 04:28:20,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:28:20,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 04:28:20,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:20,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 04:28:20,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:28:20,426 INFO L87 Difference]: Start difference. First operand 26696 states and 42314 transitions. Second operand has 18 states, 18 states have (on average 13.833333333333334) internal successors, (249), 18 states have internal predecessors, (249), 5 states have call successors, (133), 3 states have call predecessors, (133), 7 states have return successors, (134), 4 states have call predecessors, (134), 5 states have call successors, (134) [2023-11-29 04:28:24,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:28:24,196 INFO L93 Difference]: Finished difference Result 57166 states and 90053 transitions. [2023-11-29 04:28:24,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 04:28:24,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 13.833333333333334) internal successors, (249), 18 states have internal predecessors, (249), 5 states have call successors, (133), 3 states have call predecessors, (133), 7 states have return successors, (134), 4 states have call predecessors, (134), 5 states have call successors, (134) Word has length 467 [2023-11-29 04:28:24,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:28:24,232 INFO L225 Difference]: With dead ends: 57166 [2023-11-29 04:28:24,232 INFO L226 Difference]: Without dead ends: 30634 [2023-11-29 04:28:24,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 949 GetRequests, 918 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 04:28:24,250 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 1502 mSDsluCounter, 2369 mSDsCounter, 0 mSdLazyCounter, 1843 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1504 SdHoareTripleChecker+Valid, 2792 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 1843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:28:24,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1504 Valid, 2792 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 1843 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 04:28:24,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30634 states. [2023-11-29 04:28:26,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30634 to 17299. [2023-11-29 04:28:26,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17299 states, 13608 states have (on average 1.4944885361552027) internal successors, (20337), 13642 states have internal predecessors, (20337), 3327 states have call successors, (3327), 363 states have call predecessors, (3327), 363 states have return successors, (3327), 3293 states have call predecessors, (3327), 3327 states have call successors, (3327) [2023-11-29 04:28:26,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17299 states to 17299 states and 26991 transitions. [2023-11-29 04:28:26,220 INFO L78 Accepts]: Start accepts. Automaton has 17299 states and 26991 transitions. Word has length 467 [2023-11-29 04:28:26,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:28:26,221 INFO L495 AbstractCegarLoop]: Abstraction has 17299 states and 26991 transitions. [2023-11-29 04:28:26,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.833333333333334) internal successors, (249), 18 states have internal predecessors, (249), 5 states have call successors, (133), 3 states have call predecessors, (133), 7 states have return successors, (134), 4 states have call predecessors, (134), 5 states have call successors, (134) [2023-11-29 04:28:26,221 INFO L276 IsEmpty]: Start isEmpty. Operand 17299 states and 26991 transitions. [2023-11-29 04:28:26,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-11-29 04:28:26,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:28:26,225 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:28:26,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-29 04:28:26,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:26,425 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:28:26,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:26,426 INFO L85 PathProgramCache]: Analyzing trace with hash 140001130, now seen corresponding path program 1 times [2023-11-29 04:28:26,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:26,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357844590] [2023-11-29 04:28:26,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:26,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:26,478 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:28:26,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608869875] [2023-11-29 04:28:26,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:26,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:26,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:26,480 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:26,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 04:28:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:26,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 04:28:26,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 648 proven. 378 refuted. 0 times theorem prover too weak. 7818 trivial. 0 not checked. [2023-11-29 04:28:28,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:28:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 6 proven. 192 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-29 04:28:28,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:28,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357844590] [2023-11-29 04:28:28,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:28:28,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608869875] [2023-11-29 04:28:28,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608869875] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:28:28,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:28:28,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2023-11-29 04:28:28,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769885470] [2023-11-29 04:28:28,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:28:28,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 04:28:28,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:28,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 04:28:28,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:28:28,519 INFO L87 Difference]: Start difference. First operand 17299 states and 26991 transitions. Second operand has 11 states, 11 states have (on average 20.818181818181817) internal successors, (229), 10 states have internal predecessors, (229), 4 states have call successors, (131), 3 states have call predecessors, (131), 5 states have return successors, (132), 4 states have call predecessors, (132), 4 states have call successors, (132) [2023-11-29 04:28:31,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:28:31,125 INFO L93 Difference]: Finished difference Result 35168 states and 54374 transitions. [2023-11-29 04:28:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 04:28:31,126 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 20.818181818181817) internal successors, (229), 10 states have internal predecessors, (229), 4 states have call successors, (131), 3 states have call predecessors, (131), 5 states have return successors, (132), 4 states have call predecessors, (132), 4 states have call successors, (132) Word has length 467 [2023-11-29 04:28:31,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:28:31,154 INFO L225 Difference]: With dead ends: 35168 [2023-11-29 04:28:31,154 INFO L226 Difference]: Without dead ends: 18037 [2023-11-29 04:28:31,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 937 GetRequests, 922 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:28:31,178 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 546 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:28:31,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 1043 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:28:31,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18037 states. [2023-11-29 04:28:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18037 to 17739. [2023-11-29 04:28:33,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17739 states, 13938 states have (on average 1.4725929114650596) internal successors, (20525), 13972 states have internal predecessors, (20525), 3327 states have call successors, (3327), 473 states have call predecessors, (3327), 473 states have return successors, (3327), 3293 states have call predecessors, (3327), 3327 states have call successors, (3327) [2023-11-29 04:28:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17739 states to 17739 states and 27179 transitions. [2023-11-29 04:28:33,238 INFO L78 Accepts]: Start accepts. Automaton has 17739 states and 27179 transitions. Word has length 467 [2023-11-29 04:28:33,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:28:33,239 INFO L495 AbstractCegarLoop]: Abstraction has 17739 states and 27179 transitions. [2023-11-29 04:28:33,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.818181818181817) internal successors, (229), 10 states have internal predecessors, (229), 4 states have call successors, (131), 3 states have call predecessors, (131), 5 states have return successors, (132), 4 states have call predecessors, (132), 4 states have call successors, (132) [2023-11-29 04:28:33,239 INFO L276 IsEmpty]: Start isEmpty. Operand 17739 states and 27179 transitions. [2023-11-29 04:28:33,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2023-11-29 04:28:33,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:28:33,242 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:28:33,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 04:28:33,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:33,443 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:28:33,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:33,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1539829659, now seen corresponding path program 1 times [2023-11-29 04:28:33,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:33,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421967486] [2023-11-29 04:28:33,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:33,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:33,491 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:28:33,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132853337] [2023-11-29 04:28:33,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:33,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:33,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:33,492 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:33,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 04:28:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:34,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 04:28:34,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 5361 proven. 1026 refuted. 0 times theorem prover too weak. 2457 trivial. 0 not checked. [2023-11-29 04:28:38,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:28:41,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 405 proven. 918 refuted. 0 times theorem prover too weak. 7521 trivial. 0 not checked. [2023-11-29 04:28:41,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:41,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421967486] [2023-11-29 04:28:41,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:28:41,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132853337] [2023-11-29 04:28:41,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132853337] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:28:41,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:28:41,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 51 [2023-11-29 04:28:41,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434490544] [2023-11-29 04:28:41,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:28:41,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 04:28:41,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:41,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 04:28:41,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=1820, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 04:28:41,075 INFO L87 Difference]: Start difference. First operand 17739 states and 27179 transitions. Second operand has 51 states, 48 states have (on average 5.145833333333333) internal successors, (247), 44 states have internal predecessors, (247), 16 states have call successors, (131), 9 states have call predecessors, (131), 19 states have return successors, (132), 16 states have call predecessors, (132), 16 states have call successors, (132) [2023-11-29 04:28:49,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:28:49,245 INFO L93 Difference]: Finished difference Result 48007 states and 72880 transitions. [2023-11-29 04:28:49,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 04:28:49,246 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 5.145833333333333) internal successors, (247), 44 states have internal predecessors, (247), 16 states have call successors, (131), 9 states have call predecessors, (131), 19 states have return successors, (132), 16 states have call predecessors, (132), 16 states have call successors, (132) Word has length 469 [2023-11-29 04:28:49,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:28:49,286 INFO L225 Difference]: With dead ends: 48007 [2023-11-29 04:28:49,286 INFO L226 Difference]: Without dead ends: 30444 [2023-11-29 04:28:49,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 895 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2395, Invalid=5615, Unknown=0, NotChecked=0, Total=8010 [2023-11-29 04:28:49,308 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 3691 mSDsluCounter, 2612 mSDsCounter, 0 mSdLazyCounter, 2507 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3691 SdHoareTripleChecker+Valid, 2944 SdHoareTripleChecker+Invalid, 2973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 04:28:49,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3691 Valid, 2944 Invalid, 2973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2507 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 04:28:49,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30444 states. [2023-11-29 04:28:52,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30444 to 29174. [2023-11-29 04:28:52,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29174 states, 24988 states have (on average 1.4997598847446774) internal successors, (37476), 25022 states have internal predecessors, (37476), 3327 states have call successors, (3327), 858 states have call predecessors, (3327), 858 states have return successors, (3327), 3293 states have call predecessors, (3327), 3327 states have call successors, (3327) [2023-11-29 04:28:52,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29174 states to 29174 states and 44130 transitions. [2023-11-29 04:28:52,443 INFO L78 Accepts]: Start accepts. Automaton has 29174 states and 44130 transitions. Word has length 469 [2023-11-29 04:28:52,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:28:52,444 INFO L495 AbstractCegarLoop]: Abstraction has 29174 states and 44130 transitions. [2023-11-29 04:28:52,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 5.145833333333333) internal successors, (247), 44 states have internal predecessors, (247), 16 states have call successors, (131), 9 states have call predecessors, (131), 19 states have return successors, (132), 16 states have call predecessors, (132), 16 states have call successors, (132) [2023-11-29 04:28:52,444 INFO L276 IsEmpty]: Start isEmpty. Operand 29174 states and 44130 transitions. [2023-11-29 04:28:52,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-11-29 04:28:52,449 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:28:52,449 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:28:52,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-29 04:28:52,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:52,650 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:28:52,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:52,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1531617385, now seen corresponding path program 1 times [2023-11-29 04:28:52,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:52,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293907000] [2023-11-29 04:28:52,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:52,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:52,698 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:28:52,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333172883] [2023-11-29 04:28:52,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:52,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:52,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:52,700 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:52,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 04:28:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:53,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 04:28:53,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 4238 proven. 654 refuted. 0 times theorem prover too weak. 3952 trivial. 0 not checked. [2023-11-29 04:28:56,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:28:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 219 proven. 555 refuted. 0 times theorem prover too weak. 8070 trivial. 0 not checked. [2023-11-29 04:28:59,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:59,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293907000] [2023-11-29 04:28:59,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:28:59,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333172883] [2023-11-29 04:28:59,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333172883] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:28:59,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:28:59,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2023-11-29 04:28:59,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204124924] [2023-11-29 04:28:59,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:28:59,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 04:28:59,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:59,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 04:28:59,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=705, Unknown=0, NotChecked=0, Total=992 [2023-11-29 04:28:59,481 INFO L87 Difference]: Start difference. First operand 29174 states and 44130 transitions. Second operand has 32 states, 30 states have (on average 8.3) internal successors, (249), 28 states have internal predecessors, (249), 11 states have call successors, (117), 6 states have call predecessors, (117), 13 states have return successors, (118), 11 states have call predecessors, (118), 11 states have call successors, (118) [2023-11-29 04:29:13,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:29:13,804 INFO L93 Difference]: Finished difference Result 116146 states and 173332 transitions. [2023-11-29 04:29:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-29 04:29:13,805 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 8.3) internal successors, (249), 28 states have internal predecessors, (249), 11 states have call successors, (117), 6 states have call predecessors, (117), 13 states have return successors, (118), 11 states have call predecessors, (118), 11 states have call successors, (118) Word has length 470 [2023-11-29 04:29:13,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:29:13,906 INFO L225 Difference]: With dead ends: 116146 [2023-11-29 04:29:13,906 INFO L226 Difference]: Without dead ends: 87194 [2023-11-29 04:29:13,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 921 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2732 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2187, Invalid=6743, Unknown=0, NotChecked=0, Total=8930 [2023-11-29 04:29:13,934 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 2908 mSDsluCounter, 2444 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2923 SdHoareTripleChecker+Valid, 2982 SdHoareTripleChecker+Invalid, 2657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:29:13,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2923 Valid, 2982 Invalid, 2657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 2032 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 04:29:13,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87194 states. [2023-11-29 04:29:18,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87194 to 37444. [2023-11-29 04:29:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37444 states, 33093 states have (on average 1.5110446317952437) internal successors, (50005), 33127 states have internal predecessors, (50005), 3327 states have call successors, (3327), 1023 states have call predecessors, (3327), 1023 states have return successors, (3327), 3293 states have call predecessors, (3327), 3327 states have call successors, (3327) [2023-11-29 04:29:18,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37444 states to 37444 states and 56659 transitions. [2023-11-29 04:29:18,307 INFO L78 Accepts]: Start accepts. Automaton has 37444 states and 56659 transitions. Word has length 470 [2023-11-29 04:29:18,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:29:18,307 INFO L495 AbstractCegarLoop]: Abstraction has 37444 states and 56659 transitions. [2023-11-29 04:29:18,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 8.3) internal successors, (249), 28 states have internal predecessors, (249), 11 states have call successors, (117), 6 states have call predecessors, (117), 13 states have return successors, (118), 11 states have call predecessors, (118), 11 states have call successors, (118) [2023-11-29 04:29:18,308 INFO L276 IsEmpty]: Start isEmpty. Operand 37444 states and 56659 transitions. [2023-11-29 04:29:18,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-11-29 04:29:18,312 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:29:18,313 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:29:18,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 04:29:18,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:29:18,514 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:29:18,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:29:18,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1930182743, now seen corresponding path program 1 times [2023-11-29 04:29:18,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:29:18,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980290156] [2023-11-29 04:29:18,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:29:18,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:29:18,565 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:29:18,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432626577] [2023-11-29 04:29:18,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:29:18,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:29:18,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:29:18,567 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:29:18,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 04:29:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:19,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:29:19,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:29:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:29:20,214 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:29:20,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:29:20,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980290156] [2023-11-29 04:29:20,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:29:20,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432626577] [2023-11-29 04:29:20,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432626577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:29:20,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:29:20,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:29:20,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829466872] [2023-11-29 04:29:20,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:29:20,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:29:20,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:29:20,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:29:20,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:29:20,217 INFO L87 Difference]: Start difference. First operand 37444 states and 56659 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:29:28,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:29:28,016 INFO L93 Difference]: Finished difference Result 111864 states and 169381 transitions. [2023-11-29 04:29:28,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:29:28,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 470 [2023-11-29 04:29:28,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:29:28,099 INFO L225 Difference]: With dead ends: 111864 [2023-11-29 04:29:28,099 INFO L226 Difference]: Without dead ends: 74654 [2023-11-29 04:29:28,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 467 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 04:29:28,122 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 352 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:29:28,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 1460 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:29:28,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74654 states. [2023-11-29 04:29:36,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74654 to 74544. [2023-11-29 04:29:36,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74544 states, 65931 states have (on average 1.497459465198465) internal successors, (98729), 65999 states have internal predecessors, (98729), 6587 states have call successors, (6587), 2025 states have call predecessors, (6587), 2025 states have return successors, (6587), 6519 states have call predecessors, (6587), 6587 states have call successors, (6587) [2023-11-29 04:29:36,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74544 states to 74544 states and 111903 transitions. [2023-11-29 04:29:36,738 INFO L78 Accepts]: Start accepts. Automaton has 74544 states and 111903 transitions. Word has length 470 [2023-11-29 04:29:36,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:29:36,738 INFO L495 AbstractCegarLoop]: Abstraction has 74544 states and 111903 transitions. [2023-11-29 04:29:36,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:29:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 74544 states and 111903 transitions. [2023-11-29 04:29:36,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-29 04:29:36,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:29:36,746 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:29:36,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 04:29:36,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:29:36,946 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:29:36,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:29:36,947 INFO L85 PathProgramCache]: Analyzing trace with hash 746857636, now seen corresponding path program 1 times [2023-11-29 04:29:36,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:29:36,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196750711] [2023-11-29 04:29:36,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:29:36,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:29:36,990 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:29:36,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358456527] [2023-11-29 04:29:36,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:29:36,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:29:36,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:29:36,992 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:29:36,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 04:29:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:37,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-29 04:29:37,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:29:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 6419 proven. 819 refuted. 0 times theorem prover too weak. 1606 trivial. 0 not checked. [2023-11-29 04:29:41,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:30,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:30,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196750711] [2023-11-29 04:30:30,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:30:30,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358456527] [2023-11-29 04:30:30,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358456527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:30,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:30:30,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-11-29 04:30:30,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136086138] [2023-11-29 04:30:30,775 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:30,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 04:30:30,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:30,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 04:30:30,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1796, Unknown=7, NotChecked=0, Total=2162 [2023-11-29 04:30:30,778 INFO L87 Difference]: Start difference. First operand 74544 states and 111903 transitions. Second operand has 31 states, 31 states have (on average 5.645161290322581) internal successors, (175), 28 states have internal predecessors, (175), 9 states have call successors, (67), 9 states have call predecessors, (67), 13 states have return successors, (67), 9 states have call predecessors, (67), 9 states have call successors, (67) [2023-11-29 04:31:01,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:31:01,378 INFO L93 Difference]: Finished difference Result 264990 states and 400041 transitions. [2023-11-29 04:31:01,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 04:31:01,379 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.645161290322581) internal successors, (175), 28 states have internal predecessors, (175), 9 states have call successors, (67), 9 states have call predecessors, (67), 13 states have return successors, (67), 9 states have call predecessors, (67), 9 states have call successors, (67) Word has length 471 [2023-11-29 04:31:01,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:31:01,743 INFO L225 Difference]: With dead ends: 264990 [2023-11-29 04:31:01,744 INFO L226 Difference]: Without dead ends: 190680 [2023-11-29 04:31:01,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 52.8s TimeCoverageRelationStatistics Valid=1137, Invalid=4555, Unknown=8, NotChecked=0, Total=5700 [2023-11-29 04:31:01,799 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 1858 mSDsluCounter, 2814 mSDsCounter, 0 mSdLazyCounter, 2906 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1910 SdHoareTripleChecker+Valid, 3339 SdHoareTripleChecker+Invalid, 3025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:31:01,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1910 Valid, 3339 Invalid, 3025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2906 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-11-29 04:31:01,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190680 states. [2023-11-29 04:31:13,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190680 to 168164. [2023-11-29 04:31:13,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168164 states, 159006 states have (on average 1.5443693948656025) internal successors, (245564), 159074 states have internal predecessors, (245564), 6587 states have call successors, (6587), 2570 states have call predecessors, (6587), 2570 states have return successors, (6587), 6519 states have call predecessors, (6587), 6587 states have call successors, (6587) [2023-11-29 04:31:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168164 states to 168164 states and 258738 transitions. [2023-11-29 04:31:13,728 INFO L78 Accepts]: Start accepts. Automaton has 168164 states and 258738 transitions. Word has length 471 [2023-11-29 04:31:13,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:31:13,728 INFO L495 AbstractCegarLoop]: Abstraction has 168164 states and 258738 transitions. [2023-11-29 04:31:13,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.645161290322581) internal successors, (175), 28 states have internal predecessors, (175), 9 states have call successors, (67), 9 states have call predecessors, (67), 13 states have return successors, (67), 9 states have call predecessors, (67), 9 states have call successors, (67) [2023-11-29 04:31:13,729 INFO L276 IsEmpty]: Start isEmpty. Operand 168164 states and 258738 transitions. [2023-11-29 04:31:13,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-29 04:31:13,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:31:13,751 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:31:13,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 04:31:13,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 04:31:13,952 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:31:13,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:13,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1963011362, now seen corresponding path program 1 times [2023-11-29 04:31:13,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:31:13,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900483474] [2023-11-29 04:31:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:13,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:31:14,001 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:31:14,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574927673] [2023-11-29 04:31:14,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:14,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:14,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:31:14,004 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:31:14,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 04:31:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:31:14,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 04:31:14,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 2565 proven. 324 refuted. 0 times theorem prover too weak. 5955 trivial. 0 not checked. [2023-11-29 04:31:16,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 66 proven. 327 refuted. 0 times theorem prover too weak. 8451 trivial. 0 not checked. [2023-11-29 04:31:18,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:31:18,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900483474] [2023-11-29 04:31:18,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:31:18,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574927673] [2023-11-29 04:31:18,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574927673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:31:18,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:31:18,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-11-29 04:31:18,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418300100] [2023-11-29 04:31:18,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:31:18,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 04:31:18,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:31:18,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 04:31:18,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2023-11-29 04:31:18,642 INFO L87 Difference]: Start difference. First operand 168164 states and 258738 transitions. Second operand has 20 states, 19 states have (on average 12.789473684210526) internal successors, (243), 18 states have internal predecessors, (243), 6 states have call successors, (134), 4 states have call predecessors, (134), 7 states have return successors, (134), 6 states have call predecessors, (134), 6 states have call successors, (134) [2023-11-29 04:32:07,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:32:07,127 INFO L93 Difference]: Finished difference Result 969038 states and 1534023 transitions. [2023-11-29 04:32:07,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-29 04:32:07,128 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 12.789473684210526) internal successors, (243), 18 states have internal predecessors, (243), 6 states have call successors, (134), 4 states have call predecessors, (134), 7 states have return successors, (134), 6 states have call predecessors, (134), 6 states have call successors, (134) Word has length 471 [2023-11-29 04:32:07,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:32:08,811 INFO L225 Difference]: With dead ends: 969038 [2023-11-29 04:32:08,811 INFO L226 Difference]: Without dead ends: 885028 [2023-11-29 04:32:08,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 935 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1508, Invalid=4344, Unknown=0, NotChecked=0, Total=5852 [2023-11-29 04:32:08,946 INFO L413 NwaCegarLoop]: 827 mSDtfsCounter, 6571 mSDsluCounter, 7307 mSDsCounter, 0 mSdLazyCounter, 4470 mSolverCounterSat, 1232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6583 SdHoareTripleChecker+Valid, 8134 SdHoareTripleChecker+Invalid, 5702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1232 IncrementalHoareTripleChecker+Valid, 4470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:32:08,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6583 Valid, 8134 Invalid, 5702 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1232 Valid, 4470 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-11-29 04:32:09,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885028 states. [2023-11-29 04:32:46,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885028 to 465262. [2023-11-29 04:32:46,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465262 states, 441264 states have (on average 1.5493627397657639) internal successors, (683678), 441488 states have internal predecessors, (683678), 16961 states have call successors, (16961), 7036 states have call predecessors, (16961), 7036 states have return successors, (16961), 16737 states have call predecessors, (16961), 16961 states have call successors, (16961) [2023-11-29 04:32:47,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465262 states to 465262 states and 717600 transitions. [2023-11-29 04:32:47,885 INFO L78 Accepts]: Start accepts. Automaton has 465262 states and 717600 transitions. Word has length 471 [2023-11-29 04:32:47,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:32:47,886 INFO L495 AbstractCegarLoop]: Abstraction has 465262 states and 717600 transitions. [2023-11-29 04:32:47,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 12.789473684210526) internal successors, (243), 18 states have internal predecessors, (243), 6 states have call successors, (134), 4 states have call predecessors, (134), 7 states have return successors, (134), 6 states have call predecessors, (134), 6 states have call successors, (134) [2023-11-29 04:32:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand 465262 states and 717600 transitions. [2023-11-29 04:32:47,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-29 04:32:47,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:32:47,906 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:32:47,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-29 04:32:48,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 04:32:48,107 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:32:48,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:32:48,107 INFO L85 PathProgramCache]: Analyzing trace with hash -2081681128, now seen corresponding path program 1 times [2023-11-29 04:32:48,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:32:48,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89308112] [2023-11-29 04:32:48,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:32:48,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:32:48,151 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:32:48,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121578121] [2023-11-29 04:32:48,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:32:48,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:32:48,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:32:48,153 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:32:48,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 04:32:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:32:49,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-29 04:32:49,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:32:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 5897 proven. 1062 refuted. 0 times theorem prover too weak. 1885 trivial. 0 not checked. [2023-11-29 04:32:59,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:35:09,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:35:09,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89308112] [2023-11-29 04:35:09,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:35:09,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121578121] [2023-11-29 04:35:09,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121578121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:35:09,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:35:09,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2023-11-29 04:35:09,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669476351] [2023-11-29 04:35:09,953 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 04:35:09,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 04:35:09,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:35:09,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 04:35:09,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=2822, Unknown=15, NotChecked=0, Total=3540 [2023-11-29 04:35:09,956 INFO L87 Difference]: Start difference. First operand 465262 states and 717600 transitions. Second operand has 37 states, 37 states have (on average 4.8108108108108105) internal successors, (178), 33 states have internal predecessors, (178), 11 states have call successors, (67), 11 states have call predecessors, (67), 14 states have return successors, (67), 11 states have call predecessors, (67), 11 states have call successors, (67) [2023-11-29 04:36:46,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:46,485 INFO L93 Difference]: Finished difference Result 988614 states and 1521114 transitions. [2023-11-29 04:36:46,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-11-29 04:36:46,486 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.8108108108108105) internal successors, (178), 33 states have internal predecessors, (178), 11 states have call successors, (67), 11 states have call predecessors, (67), 14 states have return successors, (67), 11 states have call predecessors, (67), 11 states have call successors, (67) Word has length 471 [2023-11-29 04:36:46,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:47,773 INFO L225 Difference]: With dead ends: 988614 [2023-11-29 04:36:47,774 INFO L226 Difference]: Without dead ends: 692386 [2023-11-29 04:36:47,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 889 GetRequests, 762 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4602 ImplicationChecksByTransitivity, 158.4s TimeCoverageRelationStatistics Valid=3495, Invalid=12999, Unknown=18, NotChecked=0, Total=16512 [2023-11-29 04:36:47,936 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 3099 mSDsluCounter, 4785 mSDsCounter, 0 mSdLazyCounter, 5548 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3113 SdHoareTripleChecker+Valid, 5390 SdHoareTripleChecker+Invalid, 5884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 5548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:47,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3113 Valid, 5390 Invalid, 5884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 5548 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-11-29 04:36:48,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692386 states. [2023-11-29 04:37:27,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692386 to 582362. [2023-11-29 04:37:28,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582362 states, 557551 states have (on average 1.5545932121007764) internal successors, (866765), 557775 states have internal predecessors, (866765), 16961 states have call successors, (16961), 7849 states have call predecessors, (16961), 7849 states have return successors, (16961), 16737 states have call predecessors, (16961), 16961 states have call successors, (16961) [2023-11-29 04:37:30,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582362 states to 582362 states and 900687 transitions. [2023-11-29 04:37:30,191 INFO L78 Accepts]: Start accepts. Automaton has 582362 states and 900687 transitions. Word has length 471 [2023-11-29 04:37:30,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:37:30,192 INFO L495 AbstractCegarLoop]: Abstraction has 582362 states and 900687 transitions. [2023-11-29 04:37:30,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.8108108108108105) internal successors, (178), 33 states have internal predecessors, (178), 11 states have call successors, (67), 11 states have call predecessors, (67), 14 states have return successors, (67), 11 states have call predecessors, (67), 11 states have call successors, (67) [2023-11-29 04:37:30,192 INFO L276 IsEmpty]: Start isEmpty. Operand 582362 states and 900687 transitions. [2023-11-29 04:37:30,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-29 04:37:30,221 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:37:30,221 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:37:30,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-29 04:37:30,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 04:37:30,422 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:37:30,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:37:30,422 INFO L85 PathProgramCache]: Analyzing trace with hash 841478870, now seen corresponding path program 1 times [2023-11-29 04:37:30,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:37:30,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361479366] [2023-11-29 04:37:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:37:30,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:37:30,464 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:37:30,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783222763] [2023-11-29 04:37:30,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:37:30,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:37:30,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:37:30,465 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:37:30,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 04:37:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:37:31,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 04:37:31,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:37:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 4403 proven. 801 refuted. 0 times theorem prover too weak. 3640 trivial. 0 not checked. [2023-11-29 04:37:36,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:37:54,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:37:54,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361479366] [2023-11-29 04:37:54,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:37:54,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783222763] [2023-11-29 04:37:54,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783222763] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:37:54,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:37:54,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-11-29 04:37:54,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386673983] [2023-11-29 04:37:54,041 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 04:37:54,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 04:37:54,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:37:54,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 04:37:54,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=781, Unknown=1, NotChecked=0, Total=992 [2023-11-29 04:37:54,043 INFO L87 Difference]: Start difference. First operand 582362 states and 900687 transitions. Second operand has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 20 states have internal predecessors, (169), 7 states have call successors, (67), 7 states have call predecessors, (67), 11 states have return successors, (67), 7 states have call predecessors, (67), 7 states have call successors, (67) [2023-11-29 04:38:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:38:40,614 INFO L93 Difference]: Finished difference Result 1165374 states and 1801970 transitions. [2023-11-29 04:38:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 04:38:40,615 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 20 states have internal predecessors, (169), 7 states have call successors, (67), 7 states have call predecessors, (67), 11 states have return successors, (67), 7 states have call predecessors, (67), 7 states have call successors, (67) Word has length 471 [2023-11-29 04:38:40,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:38:41,883 INFO L225 Difference]: With dead ends: 1165374 [2023-11-29 04:38:41,883 INFO L226 Difference]: Without dead ends: 583286 [2023-11-29 04:38:42,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 788 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=631, Invalid=2020, Unknown=1, NotChecked=0, Total=2652 [2023-11-29 04:38:42,131 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 1208 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 1737 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:38:42,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1209 Valid, 1737 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 04:38:42,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583286 states. [2023-11-29 04:39:24,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583286 to 581666. [2023-11-29 04:39:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581666 states, 556855 states have (on average 1.545287372834939) internal successors, (860501), 557079 states have internal predecessors, (860501), 16961 states have call successors, (16961), 7849 states have call predecessors, (16961), 7849 states have return successors, (16961), 16737 states have call predecessors, (16961), 16961 states have call successors, (16961) [2023-11-29 04:39:27,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581666 states to 581666 states and 894423 transitions. [2023-11-29 04:39:27,497 INFO L78 Accepts]: Start accepts. Automaton has 581666 states and 894423 transitions. Word has length 471 [2023-11-29 04:39:27,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:39:27,498 INFO L495 AbstractCegarLoop]: Abstraction has 581666 states and 894423 transitions. [2023-11-29 04:39:27,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 20 states have internal predecessors, (169), 7 states have call successors, (67), 7 states have call predecessors, (67), 11 states have return successors, (67), 7 states have call predecessors, (67), 7 states have call successors, (67) [2023-11-29 04:39:27,499 INFO L276 IsEmpty]: Start isEmpty. Operand 581666 states and 894423 transitions. [2023-11-29 04:39:27,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-29 04:39:27,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:39:27,529 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:39:27,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 04:39:27,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 04:39:27,729 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:39:27,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:27,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1710961176, now seen corresponding path program 1 times [2023-11-29 04:39:27,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:39:27,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584521465] [2023-11-29 04:39:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:39:27,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:39:27,781 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:39:27,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630444049] [2023-11-29 04:39:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:39:27,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:39:27,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:39:27,782 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:39:27,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a361f4c-b44c-4020-8732-b3533dee5115/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 04:39:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:28,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-29 04:39:28,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 4080 proven. 1131 refuted. 0 times theorem prover too weak. 3633 trivial. 0 not checked. [2023-11-29 04:39:40,256 INFO L327 TraceCheckSpWp]: Computing backward predicates...