./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-17.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/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_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-17.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/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_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/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 6298bb907161662c84076065ae45708309889771194b2faa54ace396b7a9c34e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:57:46,330 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:57:46,391 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 03:57:46,397 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:57:46,397 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:57:46,422 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:57:46,423 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:57:46,424 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:57:46,424 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:57:46,425 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:57:46,425 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:57:46,426 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:57:46,426 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:57:46,427 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:57:46,427 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:57:46,428 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:57:46,428 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:57:46,429 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:57:46,429 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:57:46,430 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:57:46,430 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:57:46,431 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:57:46,431 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:57:46,431 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:57:46,432 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:57:46,432 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:57:46,433 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:57:46,433 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:57:46,434 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:57:46,434 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:57:46,434 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:57:46,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:57:46,435 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:57:46,436 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:57:46,436 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:57:46,436 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:57:46,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:57:46,437 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:57:46,437 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:57:46,438 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:57:46,438 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:57:46,439 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:57:46,439 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_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6298bb907161662c84076065ae45708309889771194b2faa54ace396b7a9c34e [2023-11-29 03:57:46,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:57:46,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:57:46,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:57:46,701 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:57:46,701 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:57:46,702 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-17.i [2023-11-29 03:57:49,419 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:57:49,717 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:57:49,718 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-17.i [2023-11-29 03:57:49,732 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/data/4c9a18075/7f23a203eb0944bd9777080a52ef8884/FLAG55f3f5d3a [2023-11-29 03:57:49,743 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/data/4c9a18075/7f23a203eb0944bd9777080a52ef8884 [2023-11-29 03:57:49,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:57:49,746 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:57:49,748 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:57:49,748 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:57:49,752 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:57:49,752 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:57:49" (1/1) ... [2023-11-29 03:57:49,753 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cdf7529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:57:49, skipping insertion in model container [2023-11-29 03:57:49,754 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:57:49" (1/1) ... [2023-11-29 03:57:49,810 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:57:49,927 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_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-17.i[916,929] [2023-11-29 03:57:50,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:57:50,158 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:57:50,170 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_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-17.i[916,929] [2023-11-29 03:57:50,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:57:50,305 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:57:50,305 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:57:50 WrapperNode [2023-11-29 03:57:50,305 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:57:50,307 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:57:50,307 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:57:50,307 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:57:50,314 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:57:50" (1/1) ... [2023-11-29 03:57:50,340 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:57:50" (1/1) ... [2023-11-29 03:57:50,487 INFO L138 Inliner]: procedures = 26, calls = 82, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 779 [2023-11-29 03:57:50,488 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:57:50,489 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:57:50,489 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:57:50,489 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:57:50,497 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:57:50" (1/1) ... [2023-11-29 03:57:50,498 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:57:50" (1/1) ... [2023-11-29 03:57:50,510 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:57:50" (1/1) ... [2023-11-29 03:57:50,566 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 03:57:50,566 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:57:50" (1/1) ... [2023-11-29 03:57:50,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:57:50" (1/1) ... [2023-11-29 03:57:50,600 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:57:50" (1/1) ... [2023-11-29 03:57:50,608 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:57:50" (1/1) ... [2023-11-29 03:57:50,626 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:57:50" (1/1) ... [2023-11-29 03:57:50,632 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:57:50" (1/1) ... [2023-11-29 03:57:50,652 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:57:50,653 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:57:50,653 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:57:50,653 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:57:50,654 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:57:50" (1/1) ... [2023-11-29 03:57:50,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:57:50,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:57:50,678 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:57:50,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:57:50,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:57:50,726 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 03:57:50,726 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 03:57:50,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 03:57:50,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:57:50,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:57:50,871 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:57:50,873 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:57:51,939 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:57:52,000 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:57:52,000 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 03:57:52,001 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:57:52 BoogieIcfgContainer [2023-11-29 03:57:52,001 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:57:52,003 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:57:52,003 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:57:52,006 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:57:52,007 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:57:49" (1/3) ... [2023-11-29 03:57:52,007 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f971753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:57:52, skipping insertion in model container [2023-11-29 03:57:52,007 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:57:50" (2/3) ... [2023-11-29 03:57:52,008 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f971753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:57:52, skipping insertion in model container [2023-11-29 03:57:52,008 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:57:52" (3/3) ... [2023-11-29 03:57:52,009 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-17.i [2023-11-29 03:57:52,028 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:57:52,028 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 03:57:52,085 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:57:52,091 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;@6168be8e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:57:52,092 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 03:57:52,098 INFO L276 IsEmpty]: Start isEmpty. Operand has 288 states, 216 states have (on average 1.5648148148148149) internal successors, (338), 217 states have internal predecessors, (338), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-29 03:57:52,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2023-11-29 03:57:52,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:57:52,128 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:52,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:57:52,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:57:52,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1271882091, now seen corresponding path program 1 times [2023-11-29 03:57:52,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:57:52,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830244160] [2023-11-29 03:57:52,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:57:52,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:57:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:57:52,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:57:52,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830244160] [2023-11-29 03:57:52,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 03:57:52,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534898730] [2023-11-29 03:57:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:57:52,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:57:52,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:57:52,488 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:57:52,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 03:57:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:57:52,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 03:57:52,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:57:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 9248 trivial. 0 not checked. [2023-11-29 03:57:53,033 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:57:53,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534898730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:57:53,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:57:53,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:57:53,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346570152] [2023-11-29 03:57:53,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:57:53,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 03:57:53,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:57:53,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 03:57:53,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 03:57:53,076 INFO L87 Difference]: Start difference. First operand has 288 states, 216 states have (on average 1.5648148148148149) internal successors, (338), 217 states have internal predecessors, (338), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) Second operand has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 2 states have call successors, (69), 2 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-29 03:57:53,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:57:53,156 INFO L93 Difference]: Finished difference Result 573 states and 1019 transitions. [2023-11-29 03:57:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 03:57:53,161 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 2 states have call successors, (69), 2 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 2 states have call successors, (69) Word has length 490 [2023-11-29 03:57:53,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:57:53,172 INFO L225 Difference]: With dead ends: 573 [2023-11-29 03:57:53,172 INFO L226 Difference]: Without dead ends: 286 [2023-11-29 03:57:53,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 489 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 03:57:53,182 INFO L413 NwaCegarLoop]: 467 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, 467 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 03:57:53,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 467 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:57:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-11-29 03:57:53,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2023-11-29 03:57:53,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 215 states have (on average 1.544186046511628) internal successors, (332), 215 states have internal predecessors, (332), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-29 03:57:53,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 470 transitions. [2023-11-29 03:57:53,292 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 470 transitions. Word has length 490 [2023-11-29 03:57:53,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:57:53,293 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 470 transitions. [2023-11-29 03:57:53,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 2 states have call successors, (69), 2 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-29 03:57:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 470 transitions. [2023-11-29 03:57:53,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2023-11-29 03:57:53,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:57:53,310 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:53,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 03:57:53,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:57:53,511 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:57:53,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:57:53,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2071694731, now seen corresponding path program 1 times [2023-11-29 03:57:53,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:57:53,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536528991] [2023-11-29 03:57:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:57:53,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:57:53,649 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:57:53,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050215023] [2023-11-29 03:57:53,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:57:53,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:57:53,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:57:53,655 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:57:53,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 03:57:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:57:54,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 03:57:54,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:57:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 03:57:54,155 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:57:54,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:57:54,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536528991] [2023-11-29 03:57:54,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:57:54,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050215023] [2023-11-29 03:57:54,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050215023] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:57:54,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:57:54,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:57:54,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015998476] [2023-11-29 03:57:54,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:57:54,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:57:54,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:57:54,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:57:54,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:57:54,161 INFO L87 Difference]: Start difference. First operand 286 states and 470 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:57:54,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:57:54,238 INFO L93 Difference]: Finished difference Result 572 states and 941 transitions. [2023-11-29 03:57:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:57:54,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 490 [2023-11-29 03:57:54,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:57:54,245 INFO L225 Difference]: With dead ends: 572 [2023-11-29 03:57:54,245 INFO L226 Difference]: Without dead ends: 287 [2023-11-29 03:57:54,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 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 03:57:54,247 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 0 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:57:54,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 925 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:57:54,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-11-29 03:57:54,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2023-11-29 03:57:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 216 states have (on average 1.5416666666666667) internal successors, (333), 216 states have internal predecessors, (333), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-29 03:57:54,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 471 transitions. [2023-11-29 03:57:54,279 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 471 transitions. Word has length 490 [2023-11-29 03:57:54,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:57:54,282 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 471 transitions. [2023-11-29 03:57:54,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:57:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 471 transitions. [2023-11-29 03:57:54,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2023-11-29 03:57:54,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:57:54,295 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:54,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 03:57:54,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:57:54,496 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:57:54,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:57:54,497 INFO L85 PathProgramCache]: Analyzing trace with hash -604139986, now seen corresponding path program 1 times [2023-11-29 03:57:54,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:57:54,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470644560] [2023-11-29 03:57:54,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:57:54,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:57:54,592 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:57:54,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344107057] [2023-11-29 03:57:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:57:54,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:57:54,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:57:54,594 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:57:54,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 03:57:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:57:55,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 1284 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 03:57:55,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:57:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 03:57:56,533 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:57:56,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:57:56,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470644560] [2023-11-29 03:57:56,533 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:57:56,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344107057] [2023-11-29 03:57:56,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344107057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:57:56,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:57:56,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:57:56,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645025747] [2023-11-29 03:57:56,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:57:56,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:57:56,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:57:56,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:57:56,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:57:56,537 INFO L87 Difference]: Start difference. First operand 287 states and 471 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:57:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:57:56,932 INFO L93 Difference]: Finished difference Result 860 states and 1412 transitions. [2023-11-29 03:57:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:57:56,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 491 [2023-11-29 03:57:56,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:57:56,940 INFO L225 Difference]: With dead ends: 860 [2023-11-29 03:57:56,940 INFO L226 Difference]: Without dead ends: 574 [2023-11-29 03:57:56,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 488 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 03:57:56,943 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 393 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:57:56,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 1382 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:57:56,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-11-29 03:57:57,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 420. [2023-11-29 03:57:57,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 279 states have (on average 1.4623655913978495) internal successors, (408), 279 states have internal predecessors, (408), 138 states have call successors, (138), 2 states have call predecessors, (138), 2 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-29 03:57:57,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 684 transitions. [2023-11-29 03:57:57,021 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 684 transitions. Word has length 491 [2023-11-29 03:57:57,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:57:57,023 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 684 transitions. [2023-11-29 03:57:57,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:57:57,024 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 684 transitions. [2023-11-29 03:57:57,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2023-11-29 03:57:57,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:57:57,029 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:57,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 03:57:57,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 03:57:57,237 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:57:57,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:57:57,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1750245296, now seen corresponding path program 1 times [2023-11-29 03:57:57,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:57:57,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548780562] [2023-11-29 03:57:57,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:57:57,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:57:57,326 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:57:57,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997712084] [2023-11-29 03:57:57,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:57:57,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:57:57,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:57:57,328 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:57:57,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 03:57:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:57:57,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 1284 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 03:57:57,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:57:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 03:57:57,900 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:57:57,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:57:57,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548780562] [2023-11-29 03:57:57,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:57:57,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997712084] [2023-11-29 03:57:57,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997712084] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:57:57,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:57:57,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:57:57,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580184975] [2023-11-29 03:57:57,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:57:57,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:57:57,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:57:57,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:57:57,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:57:57,905 INFO L87 Difference]: Start difference. First operand 420 states and 684 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:57:58,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:57:58,029 INFO L93 Difference]: Finished difference Result 882 states and 1444 transitions. [2023-11-29 03:57:58,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:57:58,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 491 [2023-11-29 03:57:58,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:57:58,037 INFO L225 Difference]: With dead ends: 882 [2023-11-29 03:57:58,037 INFO L226 Difference]: Without dead ends: 596 [2023-11-29 03:57:58,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 489 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 03:57:58,040 INFO L413 NwaCegarLoop]: 672 mSDtfsCounter, 246 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:57:58,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 1120 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:57:58,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2023-11-29 03:57:58,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 593. [2023-11-29 03:57:58,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 449 states have (on average 1.5367483296213809) internal successors, (690), 450 states have internal predecessors, (690), 140 states have call successors, (140), 3 states have call predecessors, (140), 3 states have return successors, (140), 139 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-29 03:57:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 970 transitions. [2023-11-29 03:57:58,138 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 970 transitions. Word has length 491 [2023-11-29 03:57:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:57:58,140 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 970 transitions. [2023-11-29 03:57:58,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:57:58,141 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 970 transitions. [2023-11-29 03:57:58,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2023-11-29 03:57:58,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:57:58,147 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:58,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 03:57:58,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:57:58,349 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:57:58,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:57:58,349 INFO L85 PathProgramCache]: Analyzing trace with hash -128885650, now seen corresponding path program 1 times [2023-11-29 03:57:58,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:57:58,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174851203] [2023-11-29 03:57:58,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:57:58,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:57:58,415 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:57:58,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689880414] [2023-11-29 03:57:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:57:58,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:57:58,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:57:58,418 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:57:58,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 03:57:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:57:58,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 03:57:58,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:58:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 03:58:00,055 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:58:00,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:58:00,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174851203] [2023-11-29 03:58:00,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:58:00,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689880414] [2023-11-29 03:58:00,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689880414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:58:00,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:58:00,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:58:00,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016618864] [2023-11-29 03:58:00,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:58:00,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:58:00,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:58:00,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:58:00,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:58:00,059 INFO L87 Difference]: Start difference. First operand 593 states and 970 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:58:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:58:00,577 INFO L93 Difference]: Finished difference Result 1615 states and 2639 transitions. [2023-11-29 03:58:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:58:00,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 491 [2023-11-29 03:58:00,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:58:00,589 INFO L225 Difference]: With dead ends: 1615 [2023-11-29 03:58:00,589 INFO L226 Difference]: Without dead ends: 1154 [2023-11-29 03:58:00,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 03:58:00,591 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 782 mSDsluCounter, 1281 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:58:00,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [782 Valid, 1816 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:58:00,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2023-11-29 03:58:00,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1032. [2023-11-29 03:58:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 815 states have (on average 1.5460122699386503) internal successors, (1260), 817 states have internal predecessors, (1260), 211 states have call successors, (211), 5 states have call predecessors, (211), 5 states have return successors, (211), 209 states have call predecessors, (211), 211 states have call successors, (211) [2023-11-29 03:58:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1682 transitions. [2023-11-29 03:58:00,693 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1682 transitions. Word has length 491 [2023-11-29 03:58:00,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:58:00,694 INFO L495 AbstractCegarLoop]: Abstraction has 1032 states and 1682 transitions. [2023-11-29 03:58:00,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:58:00,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1682 transitions. [2023-11-29 03:58:00,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2023-11-29 03:58:00,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:58:00,699 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:00,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 03:58:00,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:58:00,900 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:58:00,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:58:00,901 INFO L85 PathProgramCache]: Analyzing trace with hash -677501780, now seen corresponding path program 1 times [2023-11-29 03:58:00,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:58:00,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310577551] [2023-11-29 03:58:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:00,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:58:00,973 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:58:00,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903185749] [2023-11-29 03:58:00,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:00,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:58:00,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:58:00,975 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:58:00,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 03:58:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:58:01,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 03:58:01,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:58:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 03:58:03,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:58:03,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:58:03,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310577551] [2023-11-29 03:58:03,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:58:03,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903185749] [2023-11-29 03:58:03,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903185749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:58:03,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:58:03,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:58:03,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753833203] [2023-11-29 03:58:03,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:58:03,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:58:03,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:58:03,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:58:03,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:58:03,065 INFO L87 Difference]: Start difference. First operand 1032 states and 1682 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:58:03,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:58:03,554 INFO L93 Difference]: Finished difference Result 2353 states and 3844 transitions. [2023-11-29 03:58:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:58:03,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 491 [2023-11-29 03:58:03,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:58:03,566 INFO L225 Difference]: With dead ends: 2353 [2023-11-29 03:58:03,566 INFO L226 Difference]: Without dead ends: 1453 [2023-11-29 03:58:03,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 03:58:03,570 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 529 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:58:03,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 1667 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:58:03,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2023-11-29 03:58:03,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1032. [2023-11-29 03:58:03,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 815 states have (on average 1.543558282208589) internal successors, (1258), 817 states have internal predecessors, (1258), 211 states have call successors, (211), 5 states have call predecessors, (211), 5 states have return successors, (211), 209 states have call predecessors, (211), 211 states have call successors, (211) [2023-11-29 03:58:03,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1680 transitions. [2023-11-29 03:58:03,673 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1680 transitions. Word has length 491 [2023-11-29 03:58:03,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:58:03,674 INFO L495 AbstractCegarLoop]: Abstraction has 1032 states and 1680 transitions. [2023-11-29 03:58:03,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:58:03,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1680 transitions. [2023-11-29 03:58:03,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2023-11-29 03:58:03,680 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:58:03,680 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:03,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 03:58:03,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:58:03,881 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:58:03,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:58:03,881 INFO L85 PathProgramCache]: Analyzing trace with hash 941473134, now seen corresponding path program 1 times [2023-11-29 03:58:03,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:58:03,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226205983] [2023-11-29 03:58:03,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:03,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:58:03,944 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:58:03,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896054946] [2023-11-29 03:58:03,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:03,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:58:03,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:58:03,945 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:58:03,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 03:58:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:58:04,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 03:58:04,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:58:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 600 proven. 198 refuted. 0 times theorem prover too weak. 8586 trivial. 0 not checked. [2023-11-29 03:58:04,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:58:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 6 proven. 198 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 03:58:05,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:58:05,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226205983] [2023-11-29 03:58:05,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:58:05,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896054946] [2023-11-29 03:58:05,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896054946] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:58:05,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:58:05,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 03:58:05,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778956450] [2023-11-29 03:58:05,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:58:05,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 03:58:05,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:58:05,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 03:58:05,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 03:58:05,369 INFO L87 Difference]: Start difference. First operand 1032 states and 1680 transitions. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) [2023-11-29 03:58:05,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:58:05,870 INFO L93 Difference]: Finished difference Result 1671 states and 2695 transitions. [2023-11-29 03:58:05,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 03:58:05,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) Word has length 491 [2023-11-29 03:58:05,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:58:05,877 INFO L225 Difference]: With dead ends: 1671 [2023-11-29 03:58:05,877 INFO L226 Difference]: Without dead ends: 771 [2023-11-29 03:58:05,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 984 GetRequests, 974 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 03:58:05,881 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 537 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:58:05,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 1013 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:58:05,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2023-11-29 03:58:05,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 719. [2023-11-29 03:58:05,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 503 states have (on average 1.4532803180914513) internal successors, (731), 503 states have internal predecessors, (731), 207 states have call successors, (207), 8 states have call predecessors, (207), 8 states have return successors, (207), 207 states have call predecessors, (207), 207 states have call successors, (207) [2023-11-29 03:58:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1145 transitions. [2023-11-29 03:58:05,986 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1145 transitions. Word has length 491 [2023-11-29 03:58:05,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:58:05,987 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 1145 transitions. [2023-11-29 03:58:05,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) [2023-11-29 03:58:05,987 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1145 transitions. [2023-11-29 03:58:05,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2023-11-29 03:58:05,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:58:05,992 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:05,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 03:58:06,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:58:06,193 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:58:06,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:58:06,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1924065859, now seen corresponding path program 1 times [2023-11-29 03:58:06,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:58:06,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603934652] [2023-11-29 03:58:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:06,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:58:06,293 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:58:06,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426171191] [2023-11-29 03:58:06,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:06,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:58:06,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:58:06,296 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:58:06,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 03:58:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:58:06,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 1284 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 03:58:06,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:58:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 03:58:07,171 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:58:07,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:58:07,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603934652] [2023-11-29 03:58:07,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:58:07,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426171191] [2023-11-29 03:58:07,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426171191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:58:07,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:58:07,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 03:58:07,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119799664] [2023-11-29 03:58:07,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:58:07,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 03:58:07,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:58:07,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 03:58:07,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 03:58:07,174 INFO L87 Difference]: Start difference. First operand 719 states and 1145 transitions. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:58:08,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:58:08,184 INFO L93 Difference]: Finished difference Result 3079 states and 4944 transitions. [2023-11-29 03:58:08,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 03:58:08,186 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 492 [2023-11-29 03:58:08,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:58:08,202 INFO L225 Difference]: With dead ends: 3079 [2023-11-29 03:58:08,202 INFO L226 Difference]: Without dead ends: 2496 [2023-11-29 03:58:08,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2023-11-29 03:58:08,205 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 3216 mSDsluCounter, 3204 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 562 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3216 SdHoareTripleChecker+Valid, 3899 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 562 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:58:08,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3216 Valid, 3899 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [562 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 03:58:08,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2023-11-29 03:58:08,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 843. [2023-11-29 03:58:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 627 states have (on average 1.4880382775119618) internal successors, (933), 627 states have internal predecessors, (933), 207 states have call successors, (207), 8 states have call predecessors, (207), 8 states have return successors, (207), 207 states have call predecessors, (207), 207 states have call successors, (207) [2023-11-29 03:58:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1347 transitions. [2023-11-29 03:58:08,383 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1347 transitions. Word has length 492 [2023-11-29 03:58:08,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:58:08,384 INFO L495 AbstractCegarLoop]: Abstraction has 843 states and 1347 transitions. [2023-11-29 03:58:08,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:58:08,385 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1347 transitions. [2023-11-29 03:58:08,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2023-11-29 03:58:08,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:58:08,389 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:08,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 03:58:08,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:58:08,591 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:58:08,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:58:08,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1250025285, now seen corresponding path program 1 times [2023-11-29 03:58:08,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:58:08,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579720276] [2023-11-29 03:58:08,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:08,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:58:08,666 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:58:08,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863938523] [2023-11-29 03:58:08,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:08,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:58:08,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:58:08,668 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:58:08,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 03:58:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:58:09,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 1278 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 03:58:09,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:58:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 2954 proven. 165 refuted. 0 times theorem prover too weak. 6265 trivial. 0 not checked. [2023-11-29 03:58:09,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:58:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 39 proven. 165 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 03:58:09,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:58:09,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579720276] [2023-11-29 03:58:09,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:58:09,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863938523] [2023-11-29 03:58:09,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863938523] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:58:09,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:58:09,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 03:58:09,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323196222] [2023-11-29 03:58:09,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:58:09,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 03:58:09,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:58:09,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 03:58:09,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 03:58:09,762 INFO L87 Difference]: Start difference. First operand 843 states and 1347 transitions. Second operand has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) [2023-11-29 03:58:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:58:10,169 INFO L93 Difference]: Finished difference Result 1580 states and 2512 transitions. [2023-11-29 03:58:10,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 03:58:10,170 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) Word has length 492 [2023-11-29 03:58:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:58:10,177 INFO L225 Difference]: With dead ends: 1580 [2023-11-29 03:58:10,177 INFO L226 Difference]: Without dead ends: 873 [2023-11-29 03:58:10,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 986 GetRequests, 976 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 03:58:10,181 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 267 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:58:10,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 1012 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:58:10,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2023-11-29 03:58:10,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 855. [2023-11-29 03:58:10,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 636 states have (on average 1.4748427672955975) internal successors, (938), 636 states have internal predecessors, (938), 207 states have call successors, (207), 11 states have call predecessors, (207), 11 states have return successors, (207), 207 states have call predecessors, (207), 207 states have call successors, (207) [2023-11-29 03:58:10,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1352 transitions. [2023-11-29 03:58:10,307 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1352 transitions. Word has length 492 [2023-11-29 03:58:10,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:58:10,308 INFO L495 AbstractCegarLoop]: Abstraction has 855 states and 1352 transitions. [2023-11-29 03:58:10,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) [2023-11-29 03:58:10,308 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1352 transitions. [2023-11-29 03:58:10,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2023-11-29 03:58:10,313 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:58:10,313 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:10,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 03:58:10,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:58:10,514 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:58:10,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:58:10,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1048201351, now seen corresponding path program 1 times [2023-11-29 03:58:10,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:58:10,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087695272] [2023-11-29 03:58:10,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:10,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:58:10,587 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:58:10,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [871546513] [2023-11-29 03:58:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:10,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:58:10,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:58:10,589 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:58:10,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 03:58:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:58:11,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 1279 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 03:58:11,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:58:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 03:58:11,167 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:58:11,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:58:11,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087695272] [2023-11-29 03:58:11,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:58:11,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871546513] [2023-11-29 03:58:11,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871546513] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:58:11,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:58:11,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:58:11,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828065566] [2023-11-29 03:58:11,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:58:11,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:58:11,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:58:11,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:58:11,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:58:11,171 INFO L87 Difference]: Start difference. First operand 855 states and 1352 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:58:11,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:58:11,435 INFO L93 Difference]: Finished difference Result 1591 states and 2514 transitions. [2023-11-29 03:58:11,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:58:11,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 492 [2023-11-29 03:58:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:58:11,446 INFO L225 Difference]: With dead ends: 1591 [2023-11-29 03:58:11,446 INFO L226 Difference]: Without dead ends: 1231 [2023-11-29 03:58:11,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 490 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 03:58:11,448 INFO L413 NwaCegarLoop]: 815 mSDtfsCounter, 715 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:58:11,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 1731 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:58:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2023-11-29 03:58:11,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 877. [2023-11-29 03:58:11,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 655 states have (on average 1.467175572519084) internal successors, (961), 655 states have internal predecessors, (961), 207 states have call successors, (207), 14 states have call predecessors, (207), 14 states have return successors, (207), 207 states have call predecessors, (207), 207 states have call successors, (207) [2023-11-29 03:58:11,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1375 transitions. [2023-11-29 03:58:11,569 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1375 transitions. Word has length 492 [2023-11-29 03:58:11,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:58:11,570 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 1375 transitions. [2023-11-29 03:58:11,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:58:11,571 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1375 transitions. [2023-11-29 03:58:11,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2023-11-29 03:58:11,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:58:11,575 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:11,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 03:58:11,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 03:58:11,776 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:58:11,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:58:11,777 INFO L85 PathProgramCache]: Analyzing trace with hash 861632279, now seen corresponding path program 1 times [2023-11-29 03:58:11,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:58:11,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194660354] [2023-11-29 03:58:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:11,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:58:11,849 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:58:11,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632874182] [2023-11-29 03:58:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:11,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:58:11,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:58:11,850 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:58:11,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 03:58:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:58:12,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 1275 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 03:58:12,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:58:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 03:58:12,334 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:58:12,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:58:12,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194660354] [2023-11-29 03:58:12,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:58:12,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632874182] [2023-11-29 03:58:12,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632874182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:58:12,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:58:12,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:58:12,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717934998] [2023-11-29 03:58:12,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:58:12,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:58:12,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:58:12,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:58:12,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:58:12,337 INFO L87 Difference]: Start difference. First operand 877 states and 1375 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:58:12,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:58:12,762 INFO L93 Difference]: Finished difference Result 1968 states and 3103 transitions. [2023-11-29 03:58:12,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:58:12,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 493 [2023-11-29 03:58:12,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:58:12,771 INFO L225 Difference]: With dead ends: 1968 [2023-11-29 03:58:12,772 INFO L226 Difference]: Without dead ends: 1233 [2023-11-29 03:58:12,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 490 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 03:58:12,775 INFO L413 NwaCegarLoop]: 541 mSDtfsCounter, 453 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:58:12,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 1369 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:58:12,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2023-11-29 03:58:12,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 879. [2023-11-29 03:58:12,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 657 states have (on average 1.4627092846270928) internal successors, (961), 657 states have internal predecessors, (961), 207 states have call successors, (207), 14 states have call predecessors, (207), 14 states have return successors, (207), 207 states have call predecessors, (207), 207 states have call successors, (207) [2023-11-29 03:58:12,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1375 transitions. [2023-11-29 03:58:12,904 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1375 transitions. Word has length 493 [2023-11-29 03:58:12,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:58:12,904 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1375 transitions. [2023-11-29 03:58:12,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:58:12,905 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1375 transitions. [2023-11-29 03:58:12,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-29 03:58:12,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:58:12,910 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:12,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 03:58:13,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 03:58:13,110 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:58:13,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:58:13,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1727300200, now seen corresponding path program 1 times [2023-11-29 03:58:13,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:58:13,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340396888] [2023-11-29 03:58:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:13,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:58:13,172 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:58:13,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714181247] [2023-11-29 03:58:13,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:13,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:58:13,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:58:13,173 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:58:13,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 03:58:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:58:13,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 1279 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 03:58:13,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:58:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4208 proven. 66 refuted. 0 times theorem prover too weak. 5110 trivial. 0 not checked. [2023-11-29 03:58:13,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:58:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 138 proven. 66 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 03:58:14,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:58:14,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340396888] [2023-11-29 03:58:14,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:58:14,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714181247] [2023-11-29 03:58:14,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714181247] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:58:14,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:58:14,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-29 03:58:14,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040941375] [2023-11-29 03:58:14,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:58:14,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 03:58:14,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:58:14,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 03:58:14,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-29 03:58:14,249 INFO L87 Difference]: Start difference. First operand 879 states and 1375 transitions. Second operand has 13 states, 13 states have (on average 16.846153846153847) internal successors, (219), 13 states have internal predecessors, (219), 3 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 3 states have call predecessors, (92), 3 states have call successors, (92) [2023-11-29 03:58:16,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:58:16,813 INFO L93 Difference]: Finished difference Result 4152 states and 6489 transitions. [2023-11-29 03:58:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 03:58:16,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 16.846153846153847) internal successors, (219), 13 states have internal predecessors, (219), 3 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 3 states have call predecessors, (92), 3 states have call successors, (92) Word has length 494 [2023-11-29 03:58:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:58:16,830 INFO L225 Difference]: With dead ends: 4152 [2023-11-29 03:58:16,830 INFO L226 Difference]: Without dead ends: 3417 [2023-11-29 03:58:16,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 977 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=381, Invalid=1341, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 03:58:16,833 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 2779 mSDsluCounter, 4109 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2828 SdHoareTripleChecker+Valid, 4728 SdHoareTripleChecker+Invalid, 2663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 03:58:16,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2828 Valid, 4728 Invalid, 2663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 1969 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 03:58:16,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2023-11-29 03:58:17,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 1678. [2023-11-29 03:58:17,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1303 states have (on average 1.483499616270146) internal successors, (1933), 1303 states have internal predecessors, (1933), 345 states have call successors, (345), 29 states have call predecessors, (345), 29 states have return successors, (345), 345 states have call predecessors, (345), 345 states have call successors, (345) [2023-11-29 03:58:17,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 2623 transitions. [2023-11-29 03:58:17,037 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 2623 transitions. Word has length 494 [2023-11-29 03:58:17,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:58:17,038 INFO L495 AbstractCegarLoop]: Abstraction has 1678 states and 2623 transitions. [2023-11-29 03:58:17,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.846153846153847) internal successors, (219), 13 states have internal predecessors, (219), 3 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 3 states have call predecessors, (92), 3 states have call successors, (92) [2023-11-29 03:58:17,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 2623 transitions. [2023-11-29 03:58:17,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-29 03:58:17,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:58:17,042 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:17,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 03:58:17,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 03:58:17,243 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:58:17,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:58:17,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1309903594, now seen corresponding path program 1 times [2023-11-29 03:58:17,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:58:17,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899523196] [2023-11-29 03:58:17,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:17,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:58:17,319 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:58:17,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400366706] [2023-11-29 03:58:17,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:17,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:58:17,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:58:17,321 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:58:17,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 03:58:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:58:17,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 1278 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 03:58:17,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:58:18,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4730 proven. 93 refuted. 0 times theorem prover too weak. 4561 trivial. 0 not checked. [2023-11-29 03:58:18,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:58:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 111 proven. 93 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 03:58:18,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:58:18,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899523196] [2023-11-29 03:58:18,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:58:18,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400366706] [2023-11-29 03:58:18,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400366706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:58:18,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:58:18,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2023-11-29 03:58:18,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443525787] [2023-11-29 03:58:18,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:58:18,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 03:58:18,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:58:18,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 03:58:18,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-29 03:58:18,445 INFO L87 Difference]: Start difference. First operand 1678 states and 2623 transitions. Second operand has 13 states, 13 states have (on average 18.76923076923077) internal successors, (244), 13 states have internal predecessors, (244), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2023-11-29 03:58:20,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:58:20,110 INFO L93 Difference]: Finished difference Result 4870 states and 7552 transitions. [2023-11-29 03:58:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 03:58:20,110 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 18.76923076923077) internal successors, (244), 13 states have internal predecessors, (244), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) Word has length 494 [2023-11-29 03:58:20,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:58:20,130 INFO L225 Difference]: With dead ends: 4870 [2023-11-29 03:58:20,130 INFO L226 Difference]: Without dead ends: 3340 [2023-11-29 03:58:20,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1005 GetRequests, 977 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=623, Unknown=0, NotChecked=0, Total=870 [2023-11-29 03:58:20,134 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 2454 mSDsluCounter, 1564 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2493 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:58:20,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2493 Valid, 2065 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 03:58:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3340 states. [2023-11-29 03:58:20,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3340 to 3146. [2023-11-29 03:58:20,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3146 states, 2458 states have (on average 1.4759967453213996) internal successors, (3628), 2462 states have internal predecessors, (3628), 621 states have call successors, (621), 66 states have call predecessors, (621), 66 states have return successors, (621), 617 states have call predecessors, (621), 621 states have call successors, (621) [2023-11-29 03:58:20,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3146 states to 3146 states and 4870 transitions. [2023-11-29 03:58:20,424 INFO L78 Accepts]: Start accepts. Automaton has 3146 states and 4870 transitions. Word has length 494 [2023-11-29 03:58:20,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:58:20,424 INFO L495 AbstractCegarLoop]: Abstraction has 3146 states and 4870 transitions. [2023-11-29 03:58:20,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.76923076923077) internal successors, (244), 13 states have internal predecessors, (244), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2023-11-29 03:58:20,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3146 states and 4870 transitions. [2023-11-29 03:58:20,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-29 03:58:20,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:58:20,432 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:20,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 03:58:20,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 03:58:20,633 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:58:20,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:58:20,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1558050088, now seen corresponding path program 1 times [2023-11-29 03:58:20,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:58:20,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817211903] [2023-11-29 03:58:20,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:20,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:58:20,729 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:58:20,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972069011] [2023-11-29 03:58:20,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:20,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:58:20,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:58:20,731 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:58:20,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 03:58:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:58:21,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 1278 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 03:58:21,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:58:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4578 proven. 81 refuted. 0 times theorem prover too weak. 4725 trivial. 0 not checked. [2023-11-29 03:58:21,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:58:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 123 proven. 81 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 03:58:22,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:58:22,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817211903] [2023-11-29 03:58:22,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:58:22,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972069011] [2023-11-29 03:58:22,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972069011] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:58:22,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:58:22,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-29 03:58:22,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197814042] [2023-11-29 03:58:22,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:58:22,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:58:22,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:58:22,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:58:22,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:58:22,142 INFO L87 Difference]: Start difference. First operand 3146 states and 4870 transitions. Second operand has 14 states, 14 states have (on average 18.642857142857142) internal successors, (261), 14 states have internal predecessors, (261), 3 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 3 states have call predecessors, (97), 3 states have call successors, (97) [2023-11-29 03:58:26,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:58:30,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:58:32,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:58:32,702 INFO L93 Difference]: Finished difference Result 9508 states and 14591 transitions. [2023-11-29 03:58:32,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 03:58:32,703 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 18.642857142857142) internal successors, (261), 14 states have internal predecessors, (261), 3 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 3 states have call predecessors, (97), 3 states have call successors, (97) Word has length 494 [2023-11-29 03:58:32,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:58:32,730 INFO L225 Difference]: With dead ends: 9508 [2023-11-29 03:58:32,730 INFO L226 Difference]: Without dead ends: 6514 [2023-11-29 03:58:32,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 977 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=422, Invalid=1060, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 03:58:32,737 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 3805 mSDsluCounter, 2186 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 1013 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3919 SdHoareTripleChecker+Valid, 2689 SdHoareTripleChecker+Invalid, 2536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1013 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:58:32,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3919 Valid, 2689 Invalid, 2536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1013 Valid, 1521 Invalid, 2 Unknown, 0 Unchecked, 9.7s Time] [2023-11-29 03:58:32,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6514 states. [2023-11-29 03:58:33,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6514 to 5238. [2023-11-29 03:58:33,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5238 states, 4364 states have (on average 1.5119156736938588) internal successors, (6598), 4372 states have internal predecessors, (6598), 769 states have call successors, (769), 104 states have call predecessors, (769), 104 states have return successors, (769), 761 states have call predecessors, (769), 769 states have call successors, (769) [2023-11-29 03:58:33,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 8136 transitions. [2023-11-29 03:58:33,220 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 8136 transitions. Word has length 494 [2023-11-29 03:58:33,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:58:33,221 INFO L495 AbstractCegarLoop]: Abstraction has 5238 states and 8136 transitions. [2023-11-29 03:58:33,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.642857142857142) internal successors, (261), 14 states have internal predecessors, (261), 3 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 3 states have call predecessors, (97), 3 states have call successors, (97) [2023-11-29 03:58:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 8136 transitions. [2023-11-29 03:58:33,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-29 03:58:33,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:58:33,230 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:33,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 03:58:33,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 03:58:33,430 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:58:33,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:58:33,431 INFO L85 PathProgramCache]: Analyzing trace with hash -247388246, now seen corresponding path program 1 times [2023-11-29 03:58:33,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:58:33,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800653492] [2023-11-29 03:58:33,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:33,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:58:33,481 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:58:33,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647859578] [2023-11-29 03:58:33,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:33,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:58:33,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:58:33,482 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:58:33,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 03:58:33,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:58:33,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 1278 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 03:58:33,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:58:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4481 proven. 144 refuted. 0 times theorem prover too weak. 4759 trivial. 0 not checked. [2023-11-29 03:58:34,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:58:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 129 proven. 75 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 03:58:35,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:58:35,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800653492] [2023-11-29 03:58:35,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:58:35,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647859578] [2023-11-29 03:58:35,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647859578] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:58:35,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:58:35,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-11-29 03:58:35,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256406055] [2023-11-29 03:58:35,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:58:35,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 03:58:35,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:58:35,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 03:58:35,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-11-29 03:58:35,287 INFO L87 Difference]: Start difference. First operand 5238 states and 8136 transitions. Second operand has 13 states, 13 states have (on average 19.76923076923077) internal successors, (257), 12 states have internal predecessors, (257), 4 states have call successors, (94), 3 states have call predecessors, (94), 5 states have return successors, (95), 4 states have call predecessors, (95), 4 states have call successors, (95) [2023-11-29 03:58:39,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:58:41,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:58:45,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:58:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:58:47,427 INFO L93 Difference]: Finished difference Result 12874 states and 19547 transitions. [2023-11-29 03:58:47,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 03:58:47,428 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 19.76923076923077) internal successors, (257), 12 states have internal predecessors, (257), 4 states have call successors, (94), 3 states have call predecessors, (94), 5 states have return successors, (95), 4 states have call predecessors, (95), 4 states have call successors, (95) Word has length 494 [2023-11-29 03:58:47,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:58:47,457 INFO L225 Difference]: With dead ends: 12874 [2023-11-29 03:58:47,457 INFO L226 Difference]: Without dead ends: 10256 [2023-11-29 03:58:47,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1005 GetRequests, 977 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2023-11-29 03:58:47,463 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 2012 mSDsluCounter, 1972 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 570 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2099 SdHoareTripleChecker+Valid, 2431 SdHoareTripleChecker+Invalid, 1969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:58:47,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2099 Valid, 2431 Invalid, 1969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 1397 Invalid, 2 Unknown, 0 Unchecked, 11.1s Time] [2023-11-29 03:58:47,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10256 states. [2023-11-29 03:58:48,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10256 to 7530. [2023-11-29 03:58:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7530 states, 6058 states have (on average 1.4678111587982832) internal successors, (8892), 6078 states have internal predecessors, (8892), 1261 states have call successors, (1261), 210 states have call predecessors, (1261), 210 states have return successors, (1261), 1241 states have call predecessors, (1261), 1261 states have call successors, (1261) [2023-11-29 03:58:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7530 states to 7530 states and 11414 transitions. [2023-11-29 03:58:48,204 INFO L78 Accepts]: Start accepts. Automaton has 7530 states and 11414 transitions. Word has length 494 [2023-11-29 03:58:48,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:58:48,205 INFO L495 AbstractCegarLoop]: Abstraction has 7530 states and 11414 transitions. [2023-11-29 03:58:48,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.76923076923077) internal successors, (257), 12 states have internal predecessors, (257), 4 states have call successors, (94), 3 states have call predecessors, (94), 5 states have return successors, (95), 4 states have call predecessors, (95), 4 states have call successors, (95) [2023-11-29 03:58:48,205 INFO L276 IsEmpty]: Start isEmpty. Operand 7530 states and 11414 transitions. [2023-11-29 03:58:48,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 03:58:48,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:58:48,211 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:48,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 03:58:48,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 03:58:48,412 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:58:48,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:58:48,413 INFO L85 PathProgramCache]: Analyzing trace with hash 539499593, now seen corresponding path program 1 times [2023-11-29 03:58:48,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:58:48,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943505114] [2023-11-29 03:58:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:48,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:58:48,473 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:58:48,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442779586] [2023-11-29 03:58:48,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:48,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:58:48,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:58:48,475 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:58:48,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 03:58:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:58:48,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 03:58:48,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:58:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4578 proven. 81 refuted. 0 times theorem prover too weak. 4725 trivial. 0 not checked. [2023-11-29 03:58:49,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:58:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 123 proven. 81 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 03:58:49,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:58:49,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943505114] [2023-11-29 03:58:49,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:58:49,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442779586] [2023-11-29 03:58:49,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442779586] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:58:49,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:58:49,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-29 03:58:49,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70619255] [2023-11-29 03:58:49,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:58:49,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:58:49,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:58:49,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:58:49,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:58:49,778 INFO L87 Difference]: Start difference. First operand 7530 states and 11414 transitions. Second operand has 14 states, 14 states have (on average 18.357142857142858) internal successors, (257), 14 states have internal predecessors, (257), 3 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 3 states have call predecessors, (97), 3 states have call successors, (97) [2023-11-29 03:58:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:58:55,959 INFO L93 Difference]: Finished difference Result 36734 states and 54331 transitions. [2023-11-29 03:58:55,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 03:58:55,959 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 18.357142857142858) internal successors, (257), 14 states have internal predecessors, (257), 3 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 3 states have call predecessors, (97), 3 states have call successors, (97) Word has length 495 [2023-11-29 03:58:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:58:56,018 INFO L225 Difference]: With dead ends: 36734 [2023-11-29 03:58:56,018 INFO L226 Difference]: Without dead ends: 29372 [2023-11-29 03:58:56,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1030 GetRequests, 981 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=671, Invalid=1879, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 03:58:56,034 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 3474 mSDsluCounter, 2433 mSDsCounter, 0 mSdLazyCounter, 2023 mSolverCounterSat, 1356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3623 SdHoareTripleChecker+Valid, 2956 SdHoareTripleChecker+Invalid, 3379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1356 IncrementalHoareTripleChecker+Valid, 2023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:58:56,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3623 Valid, 2956 Invalid, 3379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1356 Valid, 2023 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 03:58:56,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29372 states. [2023-11-29 03:58:57,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29372 to 15086. [2023-11-29 03:58:57,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15086 states, 12608 states have (on average 1.4914340101522843) internal successors, (18804), 12644 states have internal predecessors, (18804), 2121 states have call successors, (2121), 356 states have call predecessors, (2121), 356 states have return successors, (2121), 2085 states have call predecessors, (2121), 2121 states have call successors, (2121) [2023-11-29 03:58:57,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15086 states to 15086 states and 23046 transitions. [2023-11-29 03:58:57,779 INFO L78 Accepts]: Start accepts. Automaton has 15086 states and 23046 transitions. Word has length 495 [2023-11-29 03:58:57,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:58:57,780 INFO L495 AbstractCegarLoop]: Abstraction has 15086 states and 23046 transitions. [2023-11-29 03:58:57,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.357142857142858) internal successors, (257), 14 states have internal predecessors, (257), 3 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 3 states have call predecessors, (97), 3 states have call successors, (97) [2023-11-29 03:58:57,781 INFO L276 IsEmpty]: Start isEmpty. Operand 15086 states and 23046 transitions. [2023-11-29 03:58:57,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 03:58:57,795 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:58:57,795 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:57,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 03:58:57,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 03:58:57,996 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:58:57,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:58:57,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1282046544, now seen corresponding path program 1 times [2023-11-29 03:58:57,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:58:57,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071468837] [2023-11-29 03:58:57,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:57,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:58:58,063 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:58:58,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577603183] [2023-11-29 03:58:58,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:58:58,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:58:58,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:58:58,064 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:58:58,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 03:58:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:58:58,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 03:58:58,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:58:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 03:58:59,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:58:59,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:58:59,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071468837] [2023-11-29 03:58:59,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:58:59,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577603183] [2023-11-29 03:58:59,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577603183] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:58:59,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:58:59,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 03:58:59,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868371971] [2023-11-29 03:58:59,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:58:59,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 03:58:59,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:58:59,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 03:58:59,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 03:58:59,138 INFO L87 Difference]: Start difference. First operand 15086 states and 23046 transitions. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:59:03,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:59:03,494 INFO L93 Difference]: Finished difference Result 80932 states and 125187 transitions. [2023-11-29 03:59:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 03:59:03,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 495 [2023-11-29 03:59:03,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:59:03,604 INFO L225 Difference]: With dead ends: 80932 [2023-11-29 03:59:03,604 INFO L226 Difference]: Without dead ends: 66014 [2023-11-29 03:59:03,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-29 03:59:03,636 INFO L413 NwaCegarLoop]: 866 mSDtfsCounter, 3311 mSDsluCounter, 2929 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3311 SdHoareTripleChecker+Valid, 3795 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:59:03,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3311 Valid, 3795 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 03:59:03,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66014 states. [2023-11-29 03:59:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66014 to 29728. [2023-11-29 03:59:06,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29728 states, 26515 states have (on average 1.52340184801056) internal successors, (40393), 26589 states have internal predecessors, (40393), 2689 states have call successors, (2689), 523 states have call predecessors, (2689), 523 states have return successors, (2689), 2615 states have call predecessors, (2689), 2689 states have call successors, (2689) [2023-11-29 03:59:06,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29728 states to 29728 states and 45771 transitions. [2023-11-29 03:59:06,119 INFO L78 Accepts]: Start accepts. Automaton has 29728 states and 45771 transitions. Word has length 495 [2023-11-29 03:59:06,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:59:06,120 INFO L495 AbstractCegarLoop]: Abstraction has 29728 states and 45771 transitions. [2023-11-29 03:59:06,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:59:06,121 INFO L276 IsEmpty]: Start isEmpty. Operand 29728 states and 45771 transitions. [2023-11-29 03:59:06,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 03:59:06,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:59:06,135 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:59:06,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 03:59:06,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 03:59:06,336 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:59:06,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:59:06,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1776521481, now seen corresponding path program 1 times [2023-11-29 03:59:06,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:59:06,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861794290] [2023-11-29 03:59:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:59:06,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:59:06,402 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:59:06,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767317874] [2023-11-29 03:59:06,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:59:06,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:59:06,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:59:06,403 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:59:06,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 03:59:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:59:06,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:59:06,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:59:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 03:59:07,140 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:59:07,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:59:07,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861794290] [2023-11-29 03:59:07,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:59:07,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767317874] [2023-11-29 03:59:07,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767317874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:59:07,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:59:07,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 03:59:07,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155184954] [2023-11-29 03:59:07,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:59:07,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 03:59:07,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:59:07,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 03:59:07,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 03:59:07,143 INFO L87 Difference]: Start difference. First operand 29728 states and 45771 transitions. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:59:11,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:59:11,025 INFO L93 Difference]: Finished difference Result 64932 states and 99294 transitions. [2023-11-29 03:59:11,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 03:59:11,026 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 495 [2023-11-29 03:59:11,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:59:11,072 INFO L225 Difference]: With dead ends: 64932 [2023-11-29 03:59:11,072 INFO L226 Difference]: Without dead ends: 35376 [2023-11-29 03:59:11,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-11-29 03:59:11,102 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 1476 mSDsluCounter, 2080 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 2733 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:59:11,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1476 Valid, 2733 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:59:11,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35376 states. [2023-11-29 03:59:13,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35376 to 29376. [2023-11-29 03:59:13,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29376 states, 26163 states have (on average 1.5154607652027672) internal successors, (39649), 26237 states have internal predecessors, (39649), 2689 states have call successors, (2689), 523 states have call predecessors, (2689), 523 states have return successors, (2689), 2615 states have call predecessors, (2689), 2689 states have call successors, (2689) [2023-11-29 03:59:13,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29376 states to 29376 states and 45027 transitions. [2023-11-29 03:59:13,484 INFO L78 Accepts]: Start accepts. Automaton has 29376 states and 45027 transitions. Word has length 495 [2023-11-29 03:59:13,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:59:13,485 INFO L495 AbstractCegarLoop]: Abstraction has 29376 states and 45027 transitions. [2023-11-29 03:59:13,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:59:13,485 INFO L276 IsEmpty]: Start isEmpty. Operand 29376 states and 45027 transitions. [2023-11-29 03:59:13,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 03:59:13,499 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:59:13,499 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:59:13,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 03:59:13,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 03:59:13,700 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:59:13,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:59:13,701 INFO L85 PathProgramCache]: Analyzing trace with hash -45024656, now seen corresponding path program 1 times [2023-11-29 03:59:13,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:59:13,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717553626] [2023-11-29 03:59:13,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:59:13,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:59:13,762 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:59:13,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833532172] [2023-11-29 03:59:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:59:13,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:59:13,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:59:13,764 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:59:13,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 03:59:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:59:14,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 03:59:14,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:59:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 03:59:14,663 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:59:14,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:59:14,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717553626] [2023-11-29 03:59:14,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:59:14,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833532172] [2023-11-29 03:59:14,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833532172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:59:14,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:59:14,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:59:14,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320838982] [2023-11-29 03:59:14,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:59:14,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:59:14,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:59:14,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:59:14,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:59:14,666 INFO L87 Difference]: Start difference. First operand 29376 states and 45027 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:59:19,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:59:19,460 INFO L93 Difference]: Finished difference Result 90356 states and 137770 transitions. [2023-11-29 03:59:19,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:59:19,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 495 [2023-11-29 03:59:19,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:59:19,548 INFO L225 Difference]: With dead ends: 90356 [2023-11-29 03:59:19,549 INFO L226 Difference]: Without dead ends: 60952 [2023-11-29 03:59:19,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 492 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 03:59:19,581 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 518 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:59:19,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 1473 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:59:19,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60952 states. [2023-11-29 03:59:23,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60952 to 52206. [2023-11-29 03:59:23,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52206 states, 46597 states have (on average 1.512651029036204) internal successors, (70485), 46731 states have internal predecessors, (70485), 4689 states have call successors, (4689), 919 states have call predecessors, (4689), 919 states have return successors, (4689), 4555 states have call predecessors, (4689), 4689 states have call successors, (4689) [2023-11-29 03:59:23,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52206 states to 52206 states and 79863 transitions. [2023-11-29 03:59:23,909 INFO L78 Accepts]: Start accepts. Automaton has 52206 states and 79863 transitions. Word has length 495 [2023-11-29 03:59:23,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:59:23,910 INFO L495 AbstractCegarLoop]: Abstraction has 52206 states and 79863 transitions. [2023-11-29 03:59:23,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:59:23,910 INFO L276 IsEmpty]: Start isEmpty. Operand 52206 states and 79863 transitions. [2023-11-29 03:59:23,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 03:59:23,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:59:23,926 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:59:23,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 03:59:24,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:59:24,127 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:59:24,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:59:24,127 INFO L85 PathProgramCache]: Analyzing trace with hash -539382932, now seen corresponding path program 1 times [2023-11-29 03:59:24,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:59:24,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4600228] [2023-11-29 03:59:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:59:24,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:59:24,184 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:59:24,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215760457] [2023-11-29 03:59:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:59:24,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:59:24,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:59:24,186 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:59:24,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 03:59:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:59:24,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 03:59:24,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:59:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4578 proven. 81 refuted. 0 times theorem prover too weak. 4725 trivial. 0 not checked. [2023-11-29 03:59:25,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:59:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 123 proven. 81 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 03:59:26,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:59:26,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4600228] [2023-11-29 03:59:26,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:59:26,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215760457] [2023-11-29 03:59:26,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215760457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:59:26,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:59:26,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-29 03:59:26,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310084863] [2023-11-29 03:59:26,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:59:26,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 03:59:26,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:59:26,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 03:59:26,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-29 03:59:26,170 INFO L87 Difference]: Start difference. First operand 52206 states and 79863 transitions. Second operand has 10 states, 10 states have (on average 26.9) internal successors, (269), 10 states have internal predecessors, (269), 4 states have call successors, (138), 3 states have call predecessors, (138), 5 states have return successors, (138), 4 states have call predecessors, (138), 4 states have call successors, (138) [2023-11-29 03:59:31,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:59:31,819 INFO L93 Difference]: Finished difference Result 112474 states and 172240 transitions. [2023-11-29 03:59:31,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 03:59:31,820 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.9) internal successors, (269), 10 states have internal predecessors, (269), 4 states have call successors, (138), 3 states have call predecessors, (138), 5 states have return successors, (138), 4 states have call predecessors, (138), 4 states have call successors, (138) Word has length 495 [2023-11-29 03:59:31,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:59:31,897 INFO L225 Difference]: With dead ends: 112474 [2023-11-29 03:59:31,897 INFO L226 Difference]: Without dead ends: 60440 [2023-11-29 03:59:31,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 980 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:59:31,944 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 1059 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1168 SdHoareTripleChecker+Valid, 1928 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 03:59:31,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1168 Valid, 1928 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 03:59:31,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60440 states. [2023-11-29 03:59:35,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60440 to 47094. [2023-11-29 03:59:35,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47094 states, 41485 states have (on average 1.5027359286489093) internal successors, (62341), 41619 states have internal predecessors, (62341), 4689 states have call successors, (4689), 919 states have call predecessors, (4689), 919 states have return successors, (4689), 4555 states have call predecessors, (4689), 4689 states have call successors, (4689) [2023-11-29 03:59:36,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47094 states to 47094 states and 71719 transitions. [2023-11-29 03:59:36,034 INFO L78 Accepts]: Start accepts. Automaton has 47094 states and 71719 transitions. Word has length 495 [2023-11-29 03:59:36,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:59:36,034 INFO L495 AbstractCegarLoop]: Abstraction has 47094 states and 71719 transitions. [2023-11-29 03:59:36,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.9) internal successors, (269), 10 states have internal predecessors, (269), 4 states have call successors, (138), 3 states have call predecessors, (138), 5 states have return successors, (138), 4 states have call predecessors, (138), 4 states have call successors, (138) [2023-11-29 03:59:36,035 INFO L276 IsEmpty]: Start isEmpty. Operand 47094 states and 71719 transitions. [2023-11-29 03:59:36,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 03:59:36,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:59:36,047 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:59:36,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 03:59:36,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:59:36,248 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:59:36,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:59:36,248 INFO L85 PathProgramCache]: Analyzing trace with hash -398113038, now seen corresponding path program 1 times [2023-11-29 03:59:36,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:59:36,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056835423] [2023-11-29 03:59:36,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:59:36,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:59:36,306 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:59:36,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682260240] [2023-11-29 03:59:36,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:59:36,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:59:36,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:59:36,307 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:59:36,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 03:59:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:59:36,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 03:59:36,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:59:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 03:59:36,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:59:36,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:59:36,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056835423] [2023-11-29 03:59:36,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:59:36,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682260240] [2023-11-29 03:59:36,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682260240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:59:36,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:59:36,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:59:36,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569590058] [2023-11-29 03:59:36,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:59:36,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:59:36,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:59:36,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:59:36,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:59:36,962 INFO L87 Difference]: Start difference. First operand 47094 states and 71719 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:59:41,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:59:41,058 INFO L93 Difference]: Finished difference Result 93796 states and 142982 transitions. [2023-11-29 03:59:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:59:41,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 495 [2023-11-29 03:59:41,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:59:41,126 INFO L225 Difference]: With dead ends: 93796 [2023-11-29 03:59:41,126 INFO L226 Difference]: Without dead ends: 46874 [2023-11-29 03:59:41,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 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 03:59:41,155 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 77 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:59:41,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 837 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:59:41,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46874 states. [2023-11-29 03:59:44,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46874 to 46862. [2023-11-29 03:59:44,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46862 states, 41253 states have (on average 1.4985819213148135) internal successors, (61821), 41387 states have internal predecessors, (61821), 4689 states have call successors, (4689), 919 states have call predecessors, (4689), 919 states have return successors, (4689), 4555 states have call predecessors, (4689), 4689 states have call successors, (4689) [2023-11-29 03:59:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46862 states to 46862 states and 71199 transitions. [2023-11-29 03:59:44,960 INFO L78 Accepts]: Start accepts. Automaton has 46862 states and 71199 transitions. Word has length 495 [2023-11-29 03:59:44,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:59:44,961 INFO L495 AbstractCegarLoop]: Abstraction has 46862 states and 71199 transitions. [2023-11-29 03:59:44,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 03:59:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 46862 states and 71199 transitions. [2023-11-29 03:59:44,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 03:59:44,973 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:59:44,973 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:59:44,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 03:59:45,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:59:45,174 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:59:45,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:59:45,174 INFO L85 PathProgramCache]: Analyzing trace with hash -892471314, now seen corresponding path program 1 times [2023-11-29 03:59:45,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:59:45,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199168857] [2023-11-29 03:59:45,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:59:45,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:59:45,223 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:59:45,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067263826] [2023-11-29 03:59:45,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:59:45,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:59:45,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:59:45,224 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:59:45,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 03:59:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:59:45,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 03:59:45,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:00:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 04:00:34,562 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:00:34,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:00:34,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199168857] [2023-11-29 04:00:34,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:00:34,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067263826] [2023-11-29 04:00:34,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067263826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:00:34,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:00:34,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:00:34,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054743051] [2023-11-29 04:00:34,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:00:34,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:00:34,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:00:34,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:00:34,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:00:34,564 INFO L87 Difference]: Start difference. First operand 46862 states and 71199 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 04:00:38,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:00:42,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:00:51,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:00:53,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:01:01,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:01:01,477 INFO L93 Difference]: Finished difference Result 130918 states and 198005 transitions. [2023-11-29 04:01:01,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:01:01,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 495 [2023-11-29 04:01:01,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:01:01,585 INFO L225 Difference]: With dead ends: 130918 [2023-11-29 04:01:01,586 INFO L226 Difference]: Without dead ends: 84228 [2023-11-29 04:01:01,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:01:01,618 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 661 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 83 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:01:01,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 1365 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 290 Invalid, 3 Unknown, 0 Unchecked, 15.0s Time] [2023-11-29 04:01:01,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84228 states. [2023-11-29 04:01:05,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84228 to 39168. [2023-11-29 04:01:05,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39168 states, 35098 states have (on average 1.515300017094991) internal successors, (53184), 35188 states have internal predecessors, (53184), 3395 states have call successors, (3395), 674 states have call predecessors, (3395), 674 states have return successors, (3395), 3305 states have call predecessors, (3395), 3395 states have call successors, (3395) [2023-11-29 04:01:05,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39168 states to 39168 states and 59974 transitions. [2023-11-29 04:01:05,679 INFO L78 Accepts]: Start accepts. Automaton has 39168 states and 59974 transitions. Word has length 495 [2023-11-29 04:01:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:01:05,679 INFO L495 AbstractCegarLoop]: Abstraction has 39168 states and 59974 transitions. [2023-11-29 04:01:05,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 04:01:05,679 INFO L276 IsEmpty]: Start isEmpty. Operand 39168 states and 59974 transitions. [2023-11-29 04:01:05,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 04:01:05,686 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:01:05,687 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:05,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-29 04:01:05,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:01:05,888 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:01:05,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:01:05,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1597057648, now seen corresponding path program 1 times [2023-11-29 04:01:05,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:01:05,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732117491] [2023-11-29 04:01:05,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:01:05,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:01:05,946 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:01:05,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473347248] [2023-11-29 04:01:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:01:05,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:01:05,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:01:05,947 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:01:05,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 04:01:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:01:06,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 04:01:06,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:01:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 3570 proven. 153 refuted. 0 times theorem prover too weak. 5661 trivial. 0 not checked. [2023-11-29 04:01:07,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:01:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 51 proven. 153 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 04:01:08,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:01:08,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732117491] [2023-11-29 04:01:08,148 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:01:08,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473347248] [2023-11-29 04:01:08,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473347248] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:01:08,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:01:08,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 04:01:08,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319699836] [2023-11-29 04:01:08,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:01:08,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 04:01:08,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:01:08,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 04:01:08,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:01:08,152 INFO L87 Difference]: Start difference. First operand 39168 states and 59974 transitions. Second operand has 18 states, 18 states have (on average 15.88888888888889) internal successors, (286), 18 states have internal predecessors, (286), 4 states have call successors, (138), 3 states have call predecessors, (138), 5 states have return successors, (138), 4 states have call predecessors, (138), 4 states have call successors, (138) [2023-11-29 04:01:17,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:01:17,808 INFO L93 Difference]: Finished difference Result 175721 states and 270328 transitions. [2023-11-29 04:01:17,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 04:01:17,809 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 15.88888888888889) internal successors, (286), 18 states have internal predecessors, (286), 4 states have call successors, (138), 3 states have call predecessors, (138), 5 states have return successors, (138), 4 states have call predecessors, (138), 4 states have call successors, (138) Word has length 495 [2023-11-29 04:01:17,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:01:17,952 INFO L225 Difference]: With dead ends: 175721 [2023-11-29 04:01:17,952 INFO L226 Difference]: Without dead ends: 136729 [2023-11-29 04:01:17,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 979 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=640, Invalid=1910, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 04:01:17,990 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 5668 mSDsluCounter, 3749 mSDsCounter, 0 mSdLazyCounter, 2058 mSolverCounterSat, 1026 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5668 SdHoareTripleChecker+Valid, 4224 SdHoareTripleChecker+Invalid, 3084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1026 IncrementalHoareTripleChecker+Valid, 2058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:01:17,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5668 Valid, 4224 Invalid, 3084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1026 Valid, 2058 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 04:01:18,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136729 states. [2023-11-29 04:01:23,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136729 to 59230. [2023-11-29 04:01:23,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59230 states, 54291 states have (on average 1.5279143872833434) internal successors, (82952), 54418 states have internal predecessors, (82952), 4024 states have call successors, (4024), 914 states have call predecessors, (4024), 914 states have return successors, (4024), 3897 states have call predecessors, (4024), 4024 states have call successors, (4024) [2023-11-29 04:01:23,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59230 states to 59230 states and 91000 transitions. [2023-11-29 04:01:23,268 INFO L78 Accepts]: Start accepts. Automaton has 59230 states and 91000 transitions. Word has length 495 [2023-11-29 04:01:23,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:01:23,268 INFO L495 AbstractCegarLoop]: Abstraction has 59230 states and 91000 transitions. [2023-11-29 04:01:23,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.88888888888889) internal successors, (286), 18 states have internal predecessors, (286), 4 states have call successors, (138), 3 states have call predecessors, (138), 5 states have return successors, (138), 4 states have call predecessors, (138), 4 states have call successors, (138) [2023-11-29 04:01:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 59230 states and 91000 transitions. [2023-11-29 04:01:23,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 04:01:23,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:01:23,276 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:23,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 04:01:23,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:01:23,477 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:01:23,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:01:23,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1715499122, now seen corresponding path program 1 times [2023-11-29 04:01:23,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:01:23,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214121394] [2023-11-29 04:01:23,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:01:23,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:01:23,527 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:01:23,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103524482] [2023-11-29 04:01:23,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:01:23,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:01:23,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:01:23,529 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:01:23,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 04:01:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:01:24,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 04:01:24,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:01:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 5667 proven. 204 refuted. 0 times theorem prover too weak. 3513 trivial. 0 not checked. [2023-11-29 04:01:25,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:01:35,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:01:35,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214121394] [2023-11-29 04:01:35,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:01:35,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103524482] [2023-11-29 04:01:35,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103524482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:01:35,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:01:35,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-29 04:01:35,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675377549] [2023-11-29 04:01:35,836 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 04:01:35,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:01:35,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:01:35,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:01:35,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:01:35,838 INFO L87 Difference]: Start difference. First operand 59230 states and 91000 transitions. Second operand has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 13 states have internal predecessors, (165), 3 states have call successors, (69), 3 states have call predecessors, (69), 5 states have return successors, (69), 3 states have call predecessors, (69), 3 states have call successors, (69) [2023-11-29 04:01:44,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:01:44,613 INFO L93 Difference]: Finished difference Result 120920 states and 185333 transitions. [2023-11-29 04:01:44,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 04:01:44,614 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 13 states have internal predecessors, (165), 3 states have call successors, (69), 3 states have call predecessors, (69), 5 states have return successors, (69), 3 states have call predecessors, (69), 3 states have call successors, (69) Word has length 495 [2023-11-29 04:01:44,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:01:44,682 INFO L225 Difference]: With dead ends: 120920 [2023-11-29 04:01:44,682 INFO L226 Difference]: Without dead ends: 61730 [2023-11-29 04:01:44,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 04:01:44,721 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 1231 mSDsluCounter, 3204 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1231 SdHoareTripleChecker+Valid, 3656 SdHoareTripleChecker+Invalid, 2386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:01:44,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1231 Valid, 3656 Invalid, 2386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 2001 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-29 04:01:44,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61730 states. [2023-11-29 04:01:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61730 to 61211. [2023-11-29 04:01:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61211 states, 55355 states have (on average 1.515418661367537) internal successors, (83886), 55488 states have internal predecessors, (83886), 4802 states have call successors, (4802), 1053 states have call predecessors, (4802), 1053 states have return successors, (4802), 4669 states have call predecessors, (4802), 4802 states have call successors, (4802) [2023-11-29 04:01:50,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61211 states to 61211 states and 93490 transitions. [2023-11-29 04:01:50,604 INFO L78 Accepts]: Start accepts. Automaton has 61211 states and 93490 transitions. Word has length 495 [2023-11-29 04:01:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:01:50,605 INFO L495 AbstractCegarLoop]: Abstraction has 61211 states and 93490 transitions. [2023-11-29 04:01:50,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 13 states have internal predecessors, (165), 3 states have call successors, (69), 3 states have call predecessors, (69), 5 states have return successors, (69), 3 states have call predecessors, (69), 3 states have call successors, (69) [2023-11-29 04:01:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 61211 states and 93490 transitions. [2023-11-29 04:01:50,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 04:01:50,613 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:01:50,613 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:50,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 04:01:50,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:01:50,814 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:01:50,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:01:50,814 INFO L85 PathProgramCache]: Analyzing trace with hash -333107152, now seen corresponding path program 1 times [2023-11-29 04:01:50,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:01:50,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422017372] [2023-11-29 04:01:50,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:01:50,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:01:50,868 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:01:50,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289142789] [2023-11-29 04:01:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:01:50,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:01:50,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:01:50,870 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:01:50,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 04:01:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:01:51,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 04:01:51,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:01:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 04:01:51,407 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:01:51,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:01:51,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422017372] [2023-11-29 04:01:51,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:01:51,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289142789] [2023-11-29 04:01:51,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289142789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:01:51,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:01:51,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:01:51,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700504574] [2023-11-29 04:01:51,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:01:51,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:01:51,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:01:51,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:01:51,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:01:51,410 INFO L87 Difference]: Start difference. First operand 61211 states and 93490 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 04:01:58,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:01:58,495 INFO L93 Difference]: Finished difference Result 138800 states and 211894 transitions. [2023-11-29 04:01:58,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:01:58,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 495 [2023-11-29 04:01:58,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:01:58,579 INFO L225 Difference]: With dead ends: 138800 [2023-11-29 04:01:58,579 INFO L226 Difference]: Without dead ends: 80354 [2023-11-29 04:01:58,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 493 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 04:01:58,607 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 769 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 1843 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:01:58,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [769 Valid, 1843 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:01:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80354 states. [2023-11-29 04:02:03,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80354 to 64563. [2023-11-29 04:02:03,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64563 states, 59555 states have (on average 1.524557132062799) internal successors, (90795), 59693 states have internal predecessors, (90795), 4057 states have call successors, (4057), 950 states have call predecessors, (4057), 950 states have return successors, (4057), 3919 states have call predecessors, (4057), 4057 states have call successors, (4057) [2023-11-29 04:02:03,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64563 states to 64563 states and 98909 transitions. [2023-11-29 04:02:03,927 INFO L78 Accepts]: Start accepts. Automaton has 64563 states and 98909 transitions. Word has length 495 [2023-11-29 04:02:03,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:03,927 INFO L495 AbstractCegarLoop]: Abstraction has 64563 states and 98909 transitions. [2023-11-29 04:02:03,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 04:02:03,927 INFO L276 IsEmpty]: Start isEmpty. Operand 64563 states and 98909 transitions. [2023-11-29 04:02:03,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 04:02:03,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:03,933 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:03,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 04:02:04,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 04:02:04,133 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:04,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:04,134 INFO L85 PathProgramCache]: Analyzing trace with hash 962708018, now seen corresponding path program 1 times [2023-11-29 04:02:04,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:04,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126713206] [2023-11-29 04:02:04,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:04,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:04,184 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:04,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350972738] [2023-11-29 04:02:04,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:04,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:04,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:04,185 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:04,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 04:02:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:04,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 1284 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:02:04,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 04:02:04,835 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:04,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:04,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126713206] [2023-11-29 04:02:04,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:04,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350972738] [2023-11-29 04:02:04,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350972738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:04,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:04,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:02:04,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922721703] [2023-11-29 04:02:04,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:04,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:02:04,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:04,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:02:04,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:02:04,837 INFO L87 Difference]: Start difference. First operand 64563 states and 98909 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 04:02:11,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:11,610 INFO L93 Difference]: Finished difference Result 128873 states and 196214 transitions. [2023-11-29 04:02:11,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:02:11,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 495 [2023-11-29 04:02:11,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:11,679 INFO L225 Difference]: With dead ends: 128873 [2023-11-29 04:02:11,679 INFO L226 Difference]: Without dead ends: 65043 [2023-11-29 04:02:11,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:02:11,706 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 1378 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 2286 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:11,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1378 Valid, 2286 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:02:11,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65043 states. [2023-11-29 04:02:16,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65043 to 37641. [2023-11-29 04:02:16,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37641 states, 33479 states have (on average 1.50073180202515) internal successors, (50243), 33543 states have internal predecessors, (50243), 3425 states have call successors, (3425), 736 states have call predecessors, (3425), 736 states have return successors, (3425), 3361 states have call predecessors, (3425), 3425 states have call successors, (3425) [2023-11-29 04:02:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37641 states to 37641 states and 57093 transitions. [2023-11-29 04:02:16,172 INFO L78 Accepts]: Start accepts. Automaton has 37641 states and 57093 transitions. Word has length 495 [2023-11-29 04:02:16,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:16,173 INFO L495 AbstractCegarLoop]: Abstraction has 37641 states and 57093 transitions. [2023-11-29 04:02:16,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 04:02:16,173 INFO L276 IsEmpty]: Start isEmpty. Operand 37641 states and 57093 transitions. [2023-11-29 04:02:16,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 04:02:16,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:16,178 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:16,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 04:02:16,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 04:02:16,379 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:16,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:16,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1468559602, now seen corresponding path program 1 times [2023-11-29 04:02:16,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:16,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571721873] [2023-11-29 04:02:16,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:16,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:16,429 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:16,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557489553] [2023-11-29 04:02:16,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:16,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:16,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:16,430 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:16,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 04:02:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:16,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 04:02:16,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 04:02:16,990 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:16,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:16,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571721873] [2023-11-29 04:02:16,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:16,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557489553] [2023-11-29 04:02:16,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557489553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:16,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:16,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:02:16,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243746659] [2023-11-29 04:02:16,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:16,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:02:16,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:16,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:02:16,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:02:16,993 INFO L87 Difference]: Start difference. First operand 37641 states and 57093 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 04:02:22,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:22,341 INFO L93 Difference]: Finished difference Result 79755 states and 120444 transitions. [2023-11-29 04:02:22,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:02:22,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 495 [2023-11-29 04:02:22,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:22,388 INFO L225 Difference]: With dead ends: 79755 [2023-11-29 04:02:22,388 INFO L226 Difference]: Without dead ends: 41547 [2023-11-29 04:02:22,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 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 04:02:22,416 INFO L413 NwaCegarLoop]: 817 mSDtfsCounter, 440 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:22,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 1264 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:02:22,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41547 states. [2023-11-29 04:02:27,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41547 to 36561. [2023-11-29 04:02:27,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36561 states, 32399 states have (on average 1.4937189419426526) internal successors, (48395), 32463 states have internal predecessors, (48395), 3425 states have call successors, (3425), 736 states have call predecessors, (3425), 736 states have return successors, (3425), 3361 states have call predecessors, (3425), 3425 states have call successors, (3425) [2023-11-29 04:02:27,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36561 states to 36561 states and 55245 transitions. [2023-11-29 04:02:27,268 INFO L78 Accepts]: Start accepts. Automaton has 36561 states and 55245 transitions. Word has length 495 [2023-11-29 04:02:27,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:27,268 INFO L495 AbstractCegarLoop]: Abstraction has 36561 states and 55245 transitions. [2023-11-29 04:02:27,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 04:02:27,268 INFO L276 IsEmpty]: Start isEmpty. Operand 36561 states and 55245 transitions. [2023-11-29 04:02:27,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 04:02:27,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:27,273 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:27,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 04:02:27,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:27,474 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:27,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:27,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1545460400, now seen corresponding path program 1 times [2023-11-29 04:02:27,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:27,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630865330] [2023-11-29 04:02:27,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:27,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:27,523 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:27,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910215198] [2023-11-29 04:02:27,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:27,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:27,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:27,524 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:27,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 04:02:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:28,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 1290 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:02:28,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 1100 proven. 192 refuted. 0 times theorem prover too weak. 8092 trivial. 0 not checked. [2023-11-29 04:02:28,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:02:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 12 proven. 192 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 04:02:28,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:28,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630865330] [2023-11-29 04:02:28,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:28,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910215198] [2023-11-29 04:02:28,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910215198] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:02:28,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:02:28,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 04:02:28,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635093072] [2023-11-29 04:02:28,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:02:28,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:02:28,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:28,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:02:28,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:02:28,734 INFO L87 Difference]: Start difference. First operand 36561 states and 55245 transitions. Second operand has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 2 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 2 states have call predecessors, (134), 2 states have call successors, (134) [2023-11-29 04:02:32,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:32,416 INFO L93 Difference]: Finished difference Result 59819 states and 90237 transitions. [2023-11-29 04:02:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 04:02:32,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 2 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 2 states have call predecessors, (134), 2 states have call successors, (134) Word has length 495 [2023-11-29 04:02:32,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:32,444 INFO L225 Difference]: With dead ends: 59819 [2023-11-29 04:02:32,444 INFO L226 Difference]: Without dead ends: 26143 [2023-11-29 04:02:32,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 982 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:02:32,463 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 513 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:32,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 1001 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:02:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26143 states. [2023-11-29 04:02:35,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26143 to 25727. [2023-11-29 04:02:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25727 states, 22806 states have (on average 1.4877225291589933) internal successors, (33929), 22844 states have internal predecessors, (33929), 2359 states have call successors, (2359), 561 states have call predecessors, (2359), 561 states have return successors, (2359), 2321 states have call predecessors, (2359), 2359 states have call successors, (2359) [2023-11-29 04:02:35,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25727 states to 25727 states and 38647 transitions. [2023-11-29 04:02:35,703 INFO L78 Accepts]: Start accepts. Automaton has 25727 states and 38647 transitions. Word has length 495 [2023-11-29 04:02:35,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:35,703 INFO L495 AbstractCegarLoop]: Abstraction has 25727 states and 38647 transitions. [2023-11-29 04:02:35,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 2 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 2 states have call predecessors, (134), 2 states have call successors, (134) [2023-11-29 04:02:35,704 INFO L276 IsEmpty]: Start isEmpty. Operand 25727 states and 38647 transitions. [2023-11-29 04:02:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2023-11-29 04:02:35,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:35,709 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:35,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 04:02:35,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 04:02:35,910 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:35,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:35,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1857919251, now seen corresponding path program 1 times [2023-11-29 04:02:35,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:35,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142843039] [2023-11-29 04:02:35,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:35,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:35,958 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:35,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693817928] [2023-11-29 04:02:35,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:35,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:35,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:35,960 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:35,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 04:02:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:36,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 04:02:36,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 6851 proven. 264 refuted. 0 times theorem prover too weak. 2269 trivial. 0 not checked. [2023-11-29 04:02:37,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:02:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 225 proven. 180 refuted. 0 times theorem prover too weak. 8979 trivial. 0 not checked. [2023-11-29 04:02:38,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:38,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142843039] [2023-11-29 04:02:38,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:38,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693817928] [2023-11-29 04:02:38,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693817928] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:02:38,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:02:38,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2023-11-29 04:02:38,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438664814] [2023-11-29 04:02:38,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:02:38,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 04:02:38,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:38,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 04:02:38,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2023-11-29 04:02:38,944 INFO L87 Difference]: Start difference. First operand 25727 states and 38647 transitions. Second operand has 25 states, 25 states have (on average 11.8) internal successors, (295), 25 states have internal predecessors, (295), 7 states have call successors, (120), 4 states have call predecessors, (120), 9 states have return successors, (121), 7 states have call predecessors, (121), 7 states have call successors, (121) [2023-11-29 04:02:44,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 04:02:59,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:59,781 INFO L93 Difference]: Finished difference Result 126984 states and 187984 transitions. [2023-11-29 04:02:59,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-29 04:02:59,782 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 11.8) internal successors, (295), 25 states have internal predecessors, (295), 7 states have call successors, (120), 4 states have call predecessors, (120), 9 states have return successors, (121), 7 states have call predecessors, (121), 7 states have call successors, (121) Word has length 496 [2023-11-29 04:02:59,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:59,903 INFO L225 Difference]: With dead ends: 126984 [2023-11-29 04:02:59,903 INFO L226 Difference]: Without dead ends: 102458 [2023-11-29 04:02:59,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1037 GetRequests, 973 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1241, Invalid=3049, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 04:02:59,949 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 6097 mSDsluCounter, 2366 mSDsCounter, 0 mSdLazyCounter, 2161 mSolverCounterSat, 1033 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6149 SdHoareTripleChecker+Valid, 2827 SdHoareTripleChecker+Invalid, 3195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1033 IncrementalHoareTripleChecker+Valid, 2161 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:59,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6149 Valid, 2827 Invalid, 3195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1033 Valid, 2161 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2023-11-29 04:03:00,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102458 states. [2023-11-29 04:03:03,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102458 to 26707. [2023-11-29 04:03:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26707 states, 24510 states have (on average 1.4888208894328845) internal successors, (36491), 24536 states have internal predecessors, (36491), 1721 states have call successors, (1721), 475 states have call predecessors, (1721), 475 states have return successors, (1721), 1695 states have call predecessors, (1721), 1721 states have call successors, (1721) [2023-11-29 04:03:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26707 states to 26707 states and 39933 transitions. [2023-11-29 04:03:03,687 INFO L78 Accepts]: Start accepts. Automaton has 26707 states and 39933 transitions. Word has length 496 [2023-11-29 04:03:03,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:03:03,688 INFO L495 AbstractCegarLoop]: Abstraction has 26707 states and 39933 transitions. [2023-11-29 04:03:03,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.8) internal successors, (295), 25 states have internal predecessors, (295), 7 states have call successors, (120), 4 states have call predecessors, (120), 9 states have return successors, (121), 7 states have call predecessors, (121), 7 states have call successors, (121) [2023-11-29 04:03:03,688 INFO L276 IsEmpty]: Start isEmpty. Operand 26707 states and 39933 transitions. [2023-11-29 04:03:03,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2023-11-29 04:03:03,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:03:03,694 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:03,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 04:03:03,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 04:03:03,894 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:03:03,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:03:03,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1185717777, now seen corresponding path program 1 times [2023-11-29 04:03:03,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:03:03,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255428318] [2023-11-29 04:03:03,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:03:03,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:03:03,953 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:03:03,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003877334] [2023-11-29 04:03:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:03:03,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:03:03,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:03:03,954 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:03:03,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 04:03:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:03:04,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:03:04,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:03:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4730 proven. 93 refuted. 0 times theorem prover too weak. 4561 trivial. 0 not checked. [2023-11-29 04:03:04,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:03:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 111 proven. 93 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 04:03:05,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:03:05,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255428318] [2023-11-29 04:03:05,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:03:05,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003877334] [2023-11-29 04:03:05,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003877334] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:03:05,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:03:05,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 04:03:05,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813951552] [2023-11-29 04:03:05,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:03:05,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 04:03:05,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:03:05,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 04:03:05,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-29 04:03:05,081 INFO L87 Difference]: Start difference. First operand 26707 states and 39933 transitions. Second operand has 10 states, 10 states have (on average 26.7) internal successors, (267), 10 states have internal predecessors, (267), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2023-11-29 04:03:08,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:03:08,655 INFO L93 Difference]: Finished difference Result 50759 states and 75762 transitions. [2023-11-29 04:03:08,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:03:08,656 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.7) internal successors, (267), 10 states have internal predecessors, (267), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) Word has length 496 [2023-11-29 04:03:08,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:03:08,681 INFO L225 Difference]: With dead ends: 50759 [2023-11-29 04:03:08,681 INFO L226 Difference]: Without dead ends: 26139 [2023-11-29 04:03:08,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 997 GetRequests, 982 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:03:08,695 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 857 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:03:08,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [921 Valid, 889 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:03:08,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26139 states. [2023-11-29 04:03:11,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26139 to 16019. [2023-11-29 04:03:11,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16019 states, 13916 states have (on average 1.4485484334578902) internal successors, (20158), 13940 states have internal predecessors, (20158), 1647 states have call successors, (1647), 455 states have call predecessors, (1647), 455 states have return successors, (1647), 1623 states have call predecessors, (1647), 1647 states have call successors, (1647) [2023-11-29 04:03:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16019 states to 16019 states and 23452 transitions. [2023-11-29 04:03:11,659 INFO L78 Accepts]: Start accepts. Automaton has 16019 states and 23452 transitions. Word has length 496 [2023-11-29 04:03:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:03:11,660 INFO L495 AbstractCegarLoop]: Abstraction has 16019 states and 23452 transitions. [2023-11-29 04:03:11,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.7) internal successors, (267), 10 states have internal predecessors, (267), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2023-11-29 04:03:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 16019 states and 23452 transitions. [2023-11-29 04:03:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2023-11-29 04:03:11,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:03:11,663 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:11,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 04:03:11,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:03:11,864 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:03:11,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:03:11,864 INFO L85 PathProgramCache]: Analyzing trace with hash -538635507, now seen corresponding path program 1 times [2023-11-29 04:03:11,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:03:11,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410223101] [2023-11-29 04:03:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:03:11,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:03:11,913 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:03:11,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106523874] [2023-11-29 04:03:11,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:03:11,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:03:11,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:03:11,915 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:03:11,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 04:03:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:03:12,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:03:12,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:03:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 3570 proven. 153 refuted. 0 times theorem prover too weak. 5661 trivial. 0 not checked. [2023-11-29 04:03:13,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:03:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 51 proven. 153 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 04:03:14,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:03:14,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410223101] [2023-11-29 04:03:14,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:03:14,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106523874] [2023-11-29 04:03:14,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106523874] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:03:14,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:03:14,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2023-11-29 04:03:14,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197883416] [2023-11-29 04:03:14,204 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:03:14,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 04:03:14,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:03:14,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 04:03:14,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:03:14,206 INFO L87 Difference]: Start difference. First operand 16019 states and 23452 transitions. Second operand has 19 states, 19 states have (on average 14.526315789473685) internal successors, (276), 19 states have internal predecessors, (276), 3 states have call successors, (120), 2 states have call predecessors, (120), 4 states have return successors, (121), 3 states have call predecessors, (121), 3 states have call successors, (121) [2023-11-29 04:03:23,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 04:03:32,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:03:32,229 INFO L93 Difference]: Finished difference Result 81457 states and 119486 transitions. [2023-11-29 04:03:32,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-29 04:03:32,230 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 14.526315789473685) internal successors, (276), 19 states have internal predecessors, (276), 3 states have call successors, (120), 2 states have call predecessors, (120), 4 states have return successors, (121), 3 states have call predecessors, (121), 3 states have call successors, (121) Word has length 497 [2023-11-29 04:03:32,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:03:32,298 INFO L225 Difference]: With dead ends: 81457 [2023-11-29 04:03:32,298 INFO L226 Difference]: Without dead ends: 66296 [2023-11-29 04:03:32,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1053 GetRequests, 979 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1778 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1195, Invalid=4505, Unknown=0, NotChecked=0, Total=5700 [2023-11-29 04:03:32,324 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 7677 mSDsluCounter, 3851 mSDsCounter, 0 mSdLazyCounter, 2985 mSolverCounterSat, 603 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7727 SdHoareTripleChecker+Valid, 4379 SdHoareTripleChecker+Invalid, 3589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 2985 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:03:32,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7727 Valid, 4379 Invalid, 3589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 2985 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2023-11-29 04:03:32,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66296 states. [2023-11-29 04:03:35,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66296 to 21539. [2023-11-29 04:03:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21539 states, 19436 states have (on average 1.477155793373122) internal successors, (28710), 19460 states have internal predecessors, (28710), 1647 states have call successors, (1647), 455 states have call predecessors, (1647), 455 states have return successors, (1647), 1623 states have call predecessors, (1647), 1647 states have call successors, (1647) [2023-11-29 04:03:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21539 states to 21539 states and 32004 transitions. [2023-11-29 04:03:35,606 INFO L78 Accepts]: Start accepts. Automaton has 21539 states and 32004 transitions. Word has length 497 [2023-11-29 04:03:35,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:03:35,607 INFO L495 AbstractCegarLoop]: Abstraction has 21539 states and 32004 transitions. [2023-11-29 04:03:35,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 14.526315789473685) internal successors, (276), 19 states have internal predecessors, (276), 3 states have call successors, (120), 2 states have call predecessors, (120), 4 states have return successors, (121), 3 states have call predecessors, (121), 3 states have call successors, (121) [2023-11-29 04:03:35,607 INFO L276 IsEmpty]: Start isEmpty. Operand 21539 states and 32004 transitions. [2023-11-29 04:03:35,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2023-11-29 04:03:35,611 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:03:35,612 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:35,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 04:03:35,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:03:35,812 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:03:35,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:03:35,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1567994805, now seen corresponding path program 1 times [2023-11-29 04:03:35,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:03:35,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480419682] [2023-11-29 04:03:35,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:03:35,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:03:35,933 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:03:35,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718516987] [2023-11-29 04:03:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:03:35,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:03:35,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:03:35,934 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:03:35,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 04:03:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:03:36,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 04:03:36,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:03:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 04:03:36,905 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:03:36,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:03:36,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480419682] [2023-11-29 04:03:36,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:03:36,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718516987] [2023-11-29 04:03:36,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718516987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:03:36,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:03:36,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:03:36,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581274212] [2023-11-29 04:03:36,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:03:36,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:03:36,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:03:36,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:03:36,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:03:36,908 INFO L87 Difference]: Start difference. First operand 21539 states and 32004 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 04:03:43,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:03:43,012 INFO L93 Difference]: Finished difference Result 71863 states and 107507 transitions. [2023-11-29 04:03:43,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:03:43,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 497 [2023-11-29 04:03:43,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:03:43,065 INFO L225 Difference]: With dead ends: 71863 [2023-11-29 04:03:43,065 INFO L226 Difference]: Without dead ends: 50523 [2023-11-29 04:03:43,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 494 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 04:03:43,084 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 719 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:03:43,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 1319 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:03:43,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50523 states. [2023-11-29 04:03:49,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50523 to 49877. [2023-11-29 04:03:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49877 states, 45760 states have (on average 1.4920673076923077) internal successors, (68277), 45808 states have internal predecessors, (68277), 3225 states have call successors, (3225), 891 states have call predecessors, (3225), 891 states have return successors, (3225), 3177 states have call predecessors, (3225), 3225 states have call successors, (3225) [2023-11-29 04:03:49,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49877 states to 49877 states and 74727 transitions. [2023-11-29 04:03:49,869 INFO L78 Accepts]: Start accepts. Automaton has 49877 states and 74727 transitions. Word has length 497 [2023-11-29 04:03:49,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:03:49,870 INFO L495 AbstractCegarLoop]: Abstraction has 49877 states and 74727 transitions. [2023-11-29 04:03:49,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 04:03:49,870 INFO L276 IsEmpty]: Start isEmpty. Operand 49877 states and 74727 transitions. [2023-11-29 04:03:49,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-29 04:03:49,875 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:03:49,875 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:49,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 04:03:50,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 04:03:50,076 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:03:50,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:03:50,076 INFO L85 PathProgramCache]: Analyzing trace with hash -388156624, now seen corresponding path program 1 times [2023-11-29 04:03:50,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:03:50,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326859910] [2023-11-29 04:03:50,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:03:50,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:03:50,129 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:03:50,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276030017] [2023-11-29 04:03:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:03:50,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:03:50,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:03:50,130 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:03:50,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 04:03:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:03:50,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 04:03:50,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:03:51,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4564 proven. 394 refuted. 0 times theorem prover too weak. 4426 trivial. 0 not checked. [2023-11-29 04:03:51,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:03:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 168 proven. 237 refuted. 0 times theorem prover too weak. 8979 trivial. 0 not checked. [2023-11-29 04:03:52,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:03:52,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326859910] [2023-11-29 04:03:52,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:03:52,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276030017] [2023-11-29 04:03:52,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276030017] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:03:52,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:03:52,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 04:03:52,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305041022] [2023-11-29 04:03:52,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:03:52,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 04:03:52,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:03:52,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 04:03:52,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:03:52,156 INFO L87 Difference]: Start difference. First operand 49877 states and 74727 transitions. Second operand has 18 states, 17 states have (on average 13.235294117647058) internal successors, (225), 16 states have internal predecessors, (225), 6 states have call successors, (138), 4 states have call predecessors, (138), 7 states have return successors, (138), 6 states have call predecessors, (138), 6 states have call successors, (138) [2023-11-29 04:04:06,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:04:06,070 INFO L93 Difference]: Finished difference Result 159240 states and 239569 transitions. [2023-11-29 04:04:06,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 04:04:06,071 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 13.235294117647058) internal successors, (225), 16 states have internal predecessors, (225), 6 states have call successors, (138), 4 states have call predecessors, (138), 7 states have return successors, (138), 6 states have call predecessors, (138), 6 states have call successors, (138) Word has length 499 [2023-11-29 04:04:06,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:04:06,213 INFO L225 Difference]: With dead ends: 159240 [2023-11-29 04:04:06,213 INFO L226 Difference]: Without dead ends: 109562 [2023-11-29 04:04:06,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1024 GetRequests, 986 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=514, Invalid=1046, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 04:04:06,255 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 7346 mSDsluCounter, 2902 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 1393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7347 SdHoareTripleChecker+Valid, 3242 SdHoareTripleChecker+Invalid, 3380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1393 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:04:06,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7347 Valid, 3242 Invalid, 3380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1393 Valid, 1987 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-29 04:04:06,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109562 states. [2023-11-29 04:04:16,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109562 to 85271. [2023-11-29 04:04:16,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85271 states, 78657 states have (on average 1.4923020201634947) internal successors, (117380), 78741 states have internal predecessors, (117380), 5119 states have call successors, (5119), 1494 states have call predecessors, (5119), 1494 states have return successors, (5119), 5035 states have call predecessors, (5119), 5119 states have call successors, (5119) [2023-11-29 04:04:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85271 states to 85271 states and 127618 transitions. [2023-11-29 04:04:16,880 INFO L78 Accepts]: Start accepts. Automaton has 85271 states and 127618 transitions. Word has length 499 [2023-11-29 04:04:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:04:16,881 INFO L495 AbstractCegarLoop]: Abstraction has 85271 states and 127618 transitions. [2023-11-29 04:04:16,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 13.235294117647058) internal successors, (225), 16 states have internal predecessors, (225), 6 states have call successors, (138), 4 states have call predecessors, (138), 7 states have return successors, (138), 6 states have call predecessors, (138), 6 states have call successors, (138) [2023-11-29 04:04:16,881 INFO L276 IsEmpty]: Start isEmpty. Operand 85271 states and 127618 transitions. [2023-11-29 04:04:16,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-29 04:04:16,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:04:16,886 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:04:16,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 04:04:17,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 04:04:17,086 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:04:17,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:04:17,087 INFO L85 PathProgramCache]: Analyzing trace with hash -269715150, now seen corresponding path program 1 times [2023-11-29 04:04:17,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:04:17,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043832860] [2023-11-29 04:04:17,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:04:17,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:04:17,137 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:04:17,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647592676] [2023-11-29 04:04:17,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:04:17,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:04:17,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:04:17,139 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:04:17,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 04:04:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:04:18,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 04:04:18,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:04:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 6666 proven. 441 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2023-11-29 04:04:23,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:04:45,537 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~var_1_113~0 256)) (.cse8 (mod c_~var_1_78~0 256))) (let ((.cse4 (+ .cse0 .cse8 c_~var_1_89~0)) (.cse2 (+ c_~var_1_87~0 .cse8 c_~var_1_89~0)) (.cse1 (mod c_~var_1_61~0 256))) (and (or (< .cse0 (+ c_~var_1_87~0 1)) (and (forall ((~var_1_25~0 Int)) (or (= (mod ~var_1_25~0 .cse1) 0) (< 0 (+ ~var_1_25~0 1)) (< (+ (div ~var_1_25~0 .cse1) 1) .cse2) (< c_~var_1_56~0 ~var_1_25~0))) (forall ((~var_1_25~0 Int)) (or (< (div ~var_1_25~0 .cse1) .cse2) (< c_~var_1_56~0 ~var_1_25~0))) (forall ((~var_1_25~0 Int)) (or (not (= (mod ~var_1_25~0 .cse1) 0)) (< (div ~var_1_25~0 .cse1) .cse2) (< c_~var_1_56~0 ~var_1_25~0))) (forall ((~var_1_25~0 Int)) (or (< (div ~var_1_25~0 .cse1) .cse2) (< c_~var_1_56~0 ~var_1_25~0) (< ~var_1_25~0 0))))) (forall ((~var_1_25~0 Int)) (let ((.cse3 (div ~var_1_25~0 .cse1))) (or (not (= (mod ~var_1_25~0 .cse1) 0)) (< .cse3 .cse4) (< .cse3 .cse2) (< c_~var_1_56~0 ~var_1_25~0)))) (forall ((~var_1_25~0 Int)) (let ((.cse5 (+ (div ~var_1_25~0 .cse1) 1))) (or (= (mod ~var_1_25~0 .cse1) 0) (< 0 (+ ~var_1_25~0 1)) (< .cse5 .cse2) (< c_~var_1_56~0 ~var_1_25~0) (< .cse5 .cse4)))) (forall ((~var_1_25~0 Int)) (let ((.cse6 (div ~var_1_25~0 .cse1))) (or (< .cse6 .cse4) (< .cse6 .cse2) (< c_~var_1_56~0 ~var_1_25~0)))) (or (and (forall ((~var_1_25~0 Int)) (or (< (div ~var_1_25~0 .cse1) .cse4) (< c_~var_1_56~0 ~var_1_25~0) (< ~var_1_25~0 0))) (forall ((~var_1_25~0 Int)) (or (not (= (mod ~var_1_25~0 .cse1) 0)) (< (div ~var_1_25~0 .cse1) .cse4) (< c_~var_1_56~0 ~var_1_25~0))) (forall ((~var_1_25~0 Int)) (or (= (mod ~var_1_25~0 .cse1) 0) (< 0 (+ ~var_1_25~0 1)) (< c_~var_1_56~0 ~var_1_25~0) (< (+ (div ~var_1_25~0 .cse1) 1) .cse4))) (forall ((~var_1_25~0 Int)) (or (< (div ~var_1_25~0 .cse1) .cse4) (< c_~var_1_56~0 ~var_1_25~0)))) (< c_~var_1_87~0 .cse0)) (forall ((~var_1_25~0 Int)) (let ((.cse7 (div ~var_1_25~0 .cse1))) (or (< .cse7 .cse4) (< .cse7 .cse2) (< c_~var_1_56~0 ~var_1_25~0) (< ~var_1_25~0 0))))))) is different from false [2023-11-29 04:08:33,187 WARN L293 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 04:08:52,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:08:52,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043832860] [2023-11-29 04:08:52,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:08:52,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647592676] [2023-11-29 04:08:52,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647592676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:08:52,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:08:52,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2023-11-29 04:08:52,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694668821] [2023-11-29 04:08:52,578 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 04:08:52,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 04:08:52,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:08:52,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 04:08:52,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1105, Unknown=8, NotChecked=70, Total=1406 [2023-11-29 04:08:52,580 INFO L87 Difference]: Start difference. First operand 85271 states and 127618 transitions. Second operand has 31 states, 31 states have (on average 6.225806451612903) internal successors, (193), 29 states have internal predecessors, (193), 8 states have call successors, (69), 8 states have call predecessors, (69), 13 states have return successors, (69), 8 states have call predecessors, (69), 8 states have call successors, (69) [2023-11-29 04:10:01,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:10:03,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 04:10:07,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 04:10:27,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.85s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:10:29,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:10:49,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:10:49,838 INFO L93 Difference]: Finished difference Result 185572 states and 275141 transitions. [2023-11-29 04:10:49,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 04:10:49,839 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.225806451612903) internal successors, (193), 29 states have internal predecessors, (193), 8 states have call successors, (69), 8 states have call predecessors, (69), 13 states have return successors, (69), 8 states have call predecessors, (69), 8 states have call successors, (69) Word has length 499 [2023-11-29 04:10:49,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:10:49,959 INFO L225 Difference]: With dead ends: 185572 [2023-11-29 04:10:49,959 INFO L226 Difference]: Without dead ends: 101135 [2023-11-29 04:10:50,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 181.2s TimeCoverageRelationStatistics Valid=1149, Invalid=5162, Unknown=13, NotChecked=156, Total=6480 [2023-11-29 04:10:50,011 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 4425 mSDsluCounter, 4456 mSDsCounter, 0 mSdLazyCounter, 3752 mSolverCounterSat, 939 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4425 SdHoareTripleChecker+Valid, 4984 SdHoareTripleChecker+Invalid, 4693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 939 IncrementalHoareTripleChecker+Valid, 3752 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:10:50,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4425 Valid, 4984 Invalid, 4693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [939 Valid, 3752 Invalid, 2 Unknown, 0 Unchecked, 32.9s Time] [2023-11-29 04:10:50,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101135 states. [2023-11-29 04:11:01,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101135 to 88560. [2023-11-29 04:11:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88560 states, 81361 states have (on average 1.4872113174616832) internal successors, (121001), 81457 states have internal predecessors, (121001), 5563 states have call successors, (5563), 1635 states have call predecessors, (5563), 1635 states have return successors, (5563), 5467 states have call predecessors, (5563), 5563 states have call successors, (5563) [2023-11-29 04:11:02,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88560 states to 88560 states and 132127 transitions. [2023-11-29 04:11:02,115 INFO L78 Accepts]: Start accepts. Automaton has 88560 states and 132127 transitions. Word has length 499 [2023-11-29 04:11:02,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:02,116 INFO L495 AbstractCegarLoop]: Abstraction has 88560 states and 132127 transitions. [2023-11-29 04:11:02,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.225806451612903) internal successors, (193), 29 states have internal predecessors, (193), 8 states have call successors, (69), 8 states have call predecessors, (69), 13 states have return successors, (69), 8 states have call predecessors, (69), 8 states have call successors, (69) [2023-11-29 04:11:02,116 INFO L276 IsEmpty]: Start isEmpty. Operand 88560 states and 132127 transitions. [2023-11-29 04:11:02,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-29 04:11:02,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:02,122 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:11:02,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 04:11:02,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 04:11:02,322 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:02,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:02,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1975864304, now seen corresponding path program 1 times [2023-11-29 04:11:02,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:02,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755068325] [2023-11-29 04:11:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:02,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:02,372 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:11:02,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087810138] [2023-11-29 04:11:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:02,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:02,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:02,374 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:02,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96df73e1-a9bb-4e2e-af0f-b13104fb81cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 04:11:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:03,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 1284 conjuncts, 100 conjunts are in the unsatisfiable core [2023-11-29 04:11:03,925 INFO L285 TraceCheckSpWp]: Computing forward predicates...