./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-90.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/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_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-90.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/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_7b79a751-593e-40f3-a244-704b535d13a8/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 e4802bfb7bcbeed51650826ac2ad7c4f957753538823daaa6c7d1979bc825584 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:49:31,383 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:49:31,466 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:49:31,470 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:49:31,471 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:49:31,496 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:49:31,496 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:49:31,497 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:49:31,497 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:49:31,498 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:49:31,499 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:49:31,499 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:49:31,500 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:49:31,500 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:49:31,501 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:49:31,501 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:49:31,502 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:49:31,502 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:49:31,503 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:49:31,503 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:49:31,504 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:49:31,508 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:49:31,509 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:49:31,509 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:49:31,509 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:49:31,510 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:49:31,510 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:49:31,510 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:49:31,511 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:49:31,511 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:49:31,512 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:49:31,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:49:31,512 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:49:31,512 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:49:31,513 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:49:31,513 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:49:31,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:49:31,513 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:49:31,513 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:49:31,514 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:49:31,514 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:49:31,514 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:49:31,514 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_7b79a751-593e-40f3-a244-704b535d13a8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4802bfb7bcbeed51650826ac2ad7c4f957753538823daaa6c7d1979bc825584 [2023-11-29 01:49:31,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:49:31,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:49:31,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:49:31,783 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:49:31,783 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:49:31,785 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-90.i [2023-11-29 01:49:34,514 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:49:34,781 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:49:34,782 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-90.i [2023-11-29 01:49:34,797 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/data/2108e91ed/c2a53756833e498580f0b04ae2d70161/FLAG7eb909692 [2023-11-29 01:49:34,811 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/data/2108e91ed/c2a53756833e498580f0b04ae2d70161 [2023-11-29 01:49:34,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:49:34,814 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:49:34,815 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:49:34,816 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:49:34,821 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:49:34,822 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:49:34" (1/1) ... [2023-11-29 01:49:34,823 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13282d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:34, skipping insertion in model container [2023-11-29 01:49:34,823 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:49:34" (1/1) ... [2023-11-29 01:49:34,875 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:49:35,024 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_7b79a751-593e-40f3-a244-704b535d13a8/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-90.i[916,929] [2023-11-29 01:49:35,184 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:49:35,203 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:49:35,215 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_7b79a751-593e-40f3-a244-704b535d13a8/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-90.i[916,929] [2023-11-29 01:49:35,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:49:35,316 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:49:35,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:35 WrapperNode [2023-11-29 01:49:35,317 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:49:35,318 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:49:35,318 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:49:35,318 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:49:35,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:35" (1/1) ... [2023-11-29 01:49:35,351 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:35" (1/1) ... [2023-11-29 01:49:35,475 INFO L138 Inliner]: procedures = 26, calls = 122, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 894 [2023-11-29 01:49:35,476 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:49:35,476 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:49:35,476 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:49:35,477 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:49:35,485 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:35" (1/1) ... [2023-11-29 01:49:35,485 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:35" (1/1) ... [2023-11-29 01:49:35,497 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:35" (1/1) ... [2023-11-29 01:49:35,530 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 01:49:35,530 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:35" (1/1) ... [2023-11-29 01:49:35,530 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:35" (1/1) ... [2023-11-29 01:49:35,554 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:35" (1/1) ... [2023-11-29 01:49:35,563 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:35" (1/1) ... [2023-11-29 01:49:35,577 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:35" (1/1) ... [2023-11-29 01:49:35,583 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:35" (1/1) ... [2023-11-29 01:49:35,604 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:49:35,605 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:49:35,605 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:49:35,605 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:49:35,606 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:35" (1/1) ... [2023-11-29 01:49:35,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:49:35,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:35,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:49:35,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:49:35,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:49:35,666 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 01:49:35,666 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 01:49:35,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:49:35,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:49:35,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:49:35,807 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:49:35,809 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:49:36,792 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:49:36,876 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:49:36,877 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 01:49:36,877 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:49:36 BoogieIcfgContainer [2023-11-29 01:49:36,877 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:49:36,880 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:49:36,881 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:49:36,884 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:49:36,884 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:49:34" (1/3) ... [2023-11-29 01:49:36,885 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c2c897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:49:36, skipping insertion in model container [2023-11-29 01:49:36,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:35" (2/3) ... [2023-11-29 01:49:36,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c2c897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:49:36, skipping insertion in model container [2023-11-29 01:49:36,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:49:36" (3/3) ... [2023-11-29 01:49:36,887 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-90.i [2023-11-29 01:49:36,907 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:49:36,908 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:49:36,972 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:49:36,978 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;@2de21062, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:49:36,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 01:49:36,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 341 states, 229 states have (on average 1.6593886462882097) internal successors, (380), 230 states have internal predecessors, (380), 109 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2023-11-29 01:49:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 697 [2023-11-29 01:49:37,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:37,035 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:37,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:37,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:37,042 INFO L85 PathProgramCache]: Analyzing trace with hash -630394847, now seen corresponding path program 1 times [2023-11-29 01:49:37,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:37,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743432992] [2023-11-29 01:49:37,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:37,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:37,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:37,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743432992] [2023-11-29 01:49:37,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 01:49:37,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839242517] [2023-11-29 01:49:37,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:37,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:37,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:37,451 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:37,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:49:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:37,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 01:49:37,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 23328 trivial. 0 not checked. [2023-11-29 01:49:38,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:38,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839242517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:38,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:38,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:49:38,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605477705] [2023-11-29 01:49:38,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:38,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 01:49:38,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:38,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 01:49:38,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:49:38,098 INFO L87 Difference]: Start difference. First operand has 341 states, 229 states have (on average 1.6593886462882097) internal successors, (380), 230 states have internal predecessors, (380), 109 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 2 states have call successors, (109), 2 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 2 states have call successors, (109) [2023-11-29 01:49:38,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:38,181 INFO L93 Difference]: Finished difference Result 679 states and 1303 transitions. [2023-11-29 01:49:38,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 01:49:38,184 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 2 states have call successors, (109), 2 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 2 states have call successors, (109) Word has length 696 [2023-11-29 01:49:38,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:38,197 INFO L225 Difference]: With dead ends: 679 [2023-11-29 01:49:38,197 INFO L226 Difference]: Without dead ends: 339 [2023-11-29 01:49:38,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 695 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 01:49:38,207 INFO L413 NwaCegarLoop]: 587 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, 587 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 01:49:38,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 587 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:49:38,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-11-29 01:49:38,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2023-11-29 01:49:38,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 228 states have (on average 1.631578947368421) internal successors, (372), 228 states have internal predecessors, (372), 109 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2023-11-29 01:49:38,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 590 transitions. [2023-11-29 01:49:38,312 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 590 transitions. Word has length 696 [2023-11-29 01:49:38,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:38,313 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 590 transitions. [2023-11-29 01:49:38,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 2 states have call successors, (109), 2 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 2 states have call successors, (109) [2023-11-29 01:49:38,313 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 590 transitions. [2023-11-29 01:49:38,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2023-11-29 01:49:38,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:38,330 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:38,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:49:38,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 01:49:38,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:38,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:38,532 INFO L85 PathProgramCache]: Analyzing trace with hash 93035621, now seen corresponding path program 1 times [2023-11-29 01:49:38,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:38,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608033274] [2023-11-29 01:49:38,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:38,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:38,684 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:38,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946690284] [2023-11-29 01:49:38,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:38,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:38,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:38,686 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:38,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:49:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:39,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:49:39,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-29 01:49:39,239 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:39,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:39,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608033274] [2023-11-29 01:49:39,240 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:39,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946690284] [2023-11-29 01:49:39,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946690284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:39,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:39,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:49:39,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595314360] [2023-11-29 01:49:39,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:39,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:49:39,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:39,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:49:39,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:49:39,246 INFO L87 Difference]: Start difference. First operand 339 states and 590 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:39,350 INFO L93 Difference]: Finished difference Result 1009 states and 1756 transitions. [2023-11-29 01:49:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:49:39,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 697 [2023-11-29 01:49:39,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:39,360 INFO L225 Difference]: With dead ends: 1009 [2023-11-29 01:49:39,360 INFO L226 Difference]: Without dead ends: 671 [2023-11-29 01:49:39,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 695 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 01:49:39,363 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 572 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:39,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 1152 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:49:39,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2023-11-29 01:49:39,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 669. [2023-11-29 01:49:39,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 448 states have (on average 1.6205357142857142) internal successors, (726), 448 states have internal predecessors, (726), 218 states have call successors, (218), 2 states have call predecessors, (218), 2 states have return successors, (218), 218 states have call predecessors, (218), 218 states have call successors, (218) [2023-11-29 01:49:39,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1162 transitions. [2023-11-29 01:49:39,482 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1162 transitions. Word has length 697 [2023-11-29 01:49:39,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:39,484 INFO L495 AbstractCegarLoop]: Abstraction has 669 states and 1162 transitions. [2023-11-29 01:49:39,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:39,484 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1162 transitions. [2023-11-29 01:49:39,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2023-11-29 01:49:39,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:39,505 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:39,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:49:39,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:39,706 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:39,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:39,707 INFO L85 PathProgramCache]: Analyzing trace with hash -874315033, now seen corresponding path program 1 times [2023-11-29 01:49:39,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:39,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318458488] [2023-11-29 01:49:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:39,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:39,833 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:39,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723668394] [2023-11-29 01:49:39,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:39,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:39,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:39,835 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:39,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:49:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:40,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 1596 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:49:40,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-29 01:49:40,349 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:40,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:40,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318458488] [2023-11-29 01:49:40,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:40,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723668394] [2023-11-29 01:49:40,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723668394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:40,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:40,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:49:40,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249385219] [2023-11-29 01:49:40,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:40,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:49:40,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:40,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:49:40,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:49:40,354 INFO L87 Difference]: Start difference. First operand 669 states and 1162 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:40,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:40,487 INFO L93 Difference]: Finished difference Result 1991 states and 3456 transitions. [2023-11-29 01:49:40,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:49:40,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 697 [2023-11-29 01:49:40,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:40,500 INFO L225 Difference]: With dead ends: 1991 [2023-11-29 01:49:40,500 INFO L226 Difference]: Without dead ends: 1323 [2023-11-29 01:49:40,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 695 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 01:49:40,505 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 568 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:40,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 1155 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:49:40,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2023-11-29 01:49:40,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1321. [2023-11-29 01:49:40,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 880 states have (on average 1.6113636363636363) internal successors, (1418), 880 states have internal predecessors, (1418), 436 states have call successors, (436), 4 states have call predecessors, (436), 4 states have return successors, (436), 436 states have call predecessors, (436), 436 states have call successors, (436) [2023-11-29 01:49:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 2290 transitions. [2023-11-29 01:49:40,701 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 2290 transitions. Word has length 697 [2023-11-29 01:49:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:40,703 INFO L495 AbstractCegarLoop]: Abstraction has 1321 states and 2290 transitions. [2023-11-29 01:49:40,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 2290 transitions. [2023-11-29 01:49:40,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2023-11-29 01:49:40,711 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:40,712 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:40,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:49:40,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:40,920 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:40,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:40,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1435562779, now seen corresponding path program 1 times [2023-11-29 01:49:40,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:40,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720800468] [2023-11-29 01:49:40,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:40,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:41,011 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:41,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157690206] [2023-11-29 01:49:41,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:41,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:41,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:41,013 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:41,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:49:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:41,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:49:41,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-29 01:49:41,478 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:41,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:41,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720800468] [2023-11-29 01:49:41,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:41,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157690206] [2023-11-29 01:49:41,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157690206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:41,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:41,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:49:41,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679661429] [2023-11-29 01:49:41,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:41,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:49:41,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:41,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:49:41,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:49:41,481 INFO L87 Difference]: Start difference. First operand 1321 states and 2290 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:41,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:41,625 INFO L93 Difference]: Finished difference Result 3267 states and 5680 transitions. [2023-11-29 01:49:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:49:41,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 697 [2023-11-29 01:49:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:41,640 INFO L225 Difference]: With dead ends: 3267 [2023-11-29 01:49:41,641 INFO L226 Difference]: Without dead ends: 1947 [2023-11-29 01:49:41,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 695 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 01:49:41,646 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 266 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:41,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 1235 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:49:41,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2023-11-29 01:49:41,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1941. [2023-11-29 01:49:41,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1376 states have (on average 1.6380813953488371) internal successors, (2254), 1380 states have internal predecessors, (2254), 556 states have call successors, (556), 8 states have call predecessors, (556), 8 states have return successors, (556), 552 states have call predecessors, (556), 556 states have call successors, (556) [2023-11-29 01:49:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 3366 transitions. [2023-11-29 01:49:41,988 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 3366 transitions. Word has length 697 [2023-11-29 01:49:41,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:41,990 INFO L495 AbstractCegarLoop]: Abstraction has 1941 states and 3366 transitions. [2023-11-29 01:49:41,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:41,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 3366 transitions. [2023-11-29 01:49:42,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2023-11-29 01:49:42,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:42,005 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:42,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:49:42,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:42,209 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:42,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:42,209 INFO L85 PathProgramCache]: Analyzing trace with hash 472895011, now seen corresponding path program 1 times [2023-11-29 01:49:42,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:42,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786047773] [2023-11-29 01:49:42,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:42,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:42,310 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:42,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552915512] [2023-11-29 01:49:42,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:42,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:42,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:42,311 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:42,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:49:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:42,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:49:42,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-29 01:49:42,814 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:42,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:42,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786047773] [2023-11-29 01:49:42,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:42,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552915512] [2023-11-29 01:49:42,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552915512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:42,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:42,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:49:42,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988299562] [2023-11-29 01:49:42,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:42,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:49:42,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:42,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:49:42,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:49:42,819 INFO L87 Difference]: Start difference. First operand 1941 states and 3366 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:42,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:42,967 INFO L93 Difference]: Finished difference Result 3903 states and 6748 transitions. [2023-11-29 01:49:42,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:49:42,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 697 [2023-11-29 01:49:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:42,984 INFO L225 Difference]: With dead ends: 3903 [2023-11-29 01:49:42,984 INFO L226 Difference]: Without dead ends: 1963 [2023-11-29 01:49:42,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 695 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 01:49:42,992 INFO L413 NwaCegarLoop]: 700 mSDtfsCounter, 246 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:42,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 1262 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:49:42,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2023-11-29 01:49:43,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1657. [2023-11-29 01:49:43,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1212 states have (on average 1.636963696369637) internal successors, (1984), 1212 states have internal predecessors, (1984), 436 states have call successors, (436), 8 states have call predecessors, (436), 8 states have return successors, (436), 436 states have call predecessors, (436), 436 states have call successors, (436) [2023-11-29 01:49:43,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2856 transitions. [2023-11-29 01:49:43,256 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2856 transitions. Word has length 697 [2023-11-29 01:49:43,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:43,257 INFO L495 AbstractCegarLoop]: Abstraction has 1657 states and 2856 transitions. [2023-11-29 01:49:43,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:43,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2856 transitions. [2023-11-29 01:49:43,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2023-11-29 01:49:43,266 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:43,267 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:43,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:49:43,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:43,468 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:43,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:43,468 INFO L85 PathProgramCache]: Analyzing trace with hash -135046301, now seen corresponding path program 1 times [2023-11-29 01:49:43,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:43,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9031138] [2023-11-29 01:49:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:43,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:43,557 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:43,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016289575] [2023-11-29 01:49:43,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:43,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:43,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:43,559 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:43,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:49:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:43,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:49:43,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-29 01:49:44,593 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:44,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:44,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9031138] [2023-11-29 01:49:44,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:44,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016289575] [2023-11-29 01:49:44,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016289575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:44,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:44,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:49:44,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785842997] [2023-11-29 01:49:44,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:44,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:49:44,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:44,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:49:44,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:49:44,596 INFO L87 Difference]: Start difference. First operand 1657 states and 2856 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:45,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:45,150 INFO L93 Difference]: Finished difference Result 4077 states and 7003 transitions. [2023-11-29 01:49:45,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:49:45,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 697 [2023-11-29 01:49:45,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:45,172 INFO L225 Difference]: With dead ends: 4077 [2023-11-29 01:49:45,172 INFO L226 Difference]: Without dead ends: 2421 [2023-11-29 01:49:45,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 693 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:49:45,179 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 1127 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1127 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:45,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1127 Valid, 1449 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:49:45,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2023-11-29 01:49:45,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 1617. [2023-11-29 01:49:45,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1172 states have (on average 1.5972696245733788) internal successors, (1872), 1172 states have internal predecessors, (1872), 436 states have call successors, (436), 8 states have call predecessors, (436), 8 states have return successors, (436), 436 states have call predecessors, (436), 436 states have call successors, (436) [2023-11-29 01:49:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 2744 transitions. [2023-11-29 01:49:45,501 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 2744 transitions. Word has length 697 [2023-11-29 01:49:45,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:45,503 INFO L495 AbstractCegarLoop]: Abstraction has 1617 states and 2744 transitions. [2023-11-29 01:49:45,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:45,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 2744 transitions. [2023-11-29 01:49:45,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2023-11-29 01:49:45,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:45,512 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:45,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 01:49:45,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 01:49:45,713 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:45,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:45,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1907536153, now seen corresponding path program 1 times [2023-11-29 01:49:45,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:45,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373219705] [2023-11-29 01:49:45,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:45,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:45,803 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:45,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166295000] [2023-11-29 01:49:45,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:45,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:45,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:45,805 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:45,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:49:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:46,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:49:46,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-29 01:49:46,830 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:46,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:46,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373219705] [2023-11-29 01:49:46,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:46,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166295000] [2023-11-29 01:49:46,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166295000] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:46,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:46,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:49:46,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773569754] [2023-11-29 01:49:46,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:46,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:49:46,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:46,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:49:46,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:49:46,833 INFO L87 Difference]: Start difference. First operand 1617 states and 2744 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:47,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:47,451 INFO L93 Difference]: Finished difference Result 6457 states and 10942 transitions. [2023-11-29 01:49:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:49:47,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 697 [2023-11-29 01:49:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:47,487 INFO L225 Difference]: With dead ends: 6457 [2023-11-29 01:49:47,487 INFO L226 Difference]: Without dead ends: 4841 [2023-11-29 01:49:47,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 695 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 01:49:47,496 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 1431 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1431 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:47,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1431 Valid, 1683 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:49:47,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4841 states. [2023-11-29 01:49:47,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4841 to 1621. [2023-11-29 01:49:47,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1176 states have (on average 1.5952380952380953) internal successors, (1876), 1176 states have internal predecessors, (1876), 436 states have call successors, (436), 8 states have call predecessors, (436), 8 states have return successors, (436), 436 states have call predecessors, (436), 436 states have call successors, (436) [2023-11-29 01:49:47,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2748 transitions. [2023-11-29 01:49:47,875 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2748 transitions. Word has length 697 [2023-11-29 01:49:47,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:47,877 INFO L495 AbstractCegarLoop]: Abstraction has 1621 states and 2748 transitions. [2023-11-29 01:49:47,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:47,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2748 transitions. [2023-11-29 01:49:47,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2023-11-29 01:49:47,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:47,886 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:47,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:49:48,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:48,087 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:48,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:48,087 INFO L85 PathProgramCache]: Analyzing trace with hash 799083241, now seen corresponding path program 1 times [2023-11-29 01:49:48,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:48,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264551089] [2023-11-29 01:49:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:48,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:48,174 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:48,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106338367] [2023-11-29 01:49:48,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:48,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:48,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:48,176 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:48,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:49:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:48,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:49:48,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-29 01:49:48,666 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:48,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:48,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264551089] [2023-11-29 01:49:48,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:48,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106338367] [2023-11-29 01:49:48,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106338367] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:48,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:48,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:49:48,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176027995] [2023-11-29 01:49:48,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:48,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:49:48,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:48,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:49:48,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:49:48,670 INFO L87 Difference]: Start difference. First operand 1621 states and 2748 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:49,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:49,307 INFO L93 Difference]: Finished difference Result 3453 states and 5844 transitions. [2023-11-29 01:49:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:49:49,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 697 [2023-11-29 01:49:49,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:49,324 INFO L225 Difference]: With dead ends: 3453 [2023-11-29 01:49:49,324 INFO L226 Difference]: Without dead ends: 1833 [2023-11-29 01:49:49,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:49:49,331 INFO L413 NwaCegarLoop]: 811 mSDtfsCounter, 806 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 1688 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:49,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [806 Valid, 1688 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:49:49,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2023-11-29 01:49:49,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1621. [2023-11-29 01:49:49,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1176 states have (on average 1.5935374149659864) internal successors, (1874), 1176 states have internal predecessors, (1874), 436 states have call successors, (436), 8 states have call predecessors, (436), 8 states have return successors, (436), 436 states have call predecessors, (436), 436 states have call successors, (436) [2023-11-29 01:49:49,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2746 transitions. [2023-11-29 01:49:49,543 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2746 transitions. Word has length 697 [2023-11-29 01:49:49,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:49,544 INFO L495 AbstractCegarLoop]: Abstraction has 1621 states and 2746 transitions. [2023-11-29 01:49:49,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:49,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2746 transitions. [2023-11-29 01:49:49,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2023-11-29 01:49:49,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:49,554 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:49,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:49:49,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:49,757 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:49,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:49,757 INFO L85 PathProgramCache]: Analyzing trace with hash -266450869, now seen corresponding path program 1 times [2023-11-29 01:49:49,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:49,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172756577] [2023-11-29 01:49:49,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:49,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:49,841 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:49,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551207287] [2023-11-29 01:49:49,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:49,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:49,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:49,842 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:49,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:49:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:50,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:49:50,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 11808 proven. 174 refuted. 0 times theorem prover too weak. 11562 trivial. 0 not checked. [2023-11-29 01:49:50,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:49:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 150 proven. 174 refuted. 0 times theorem prover too weak. 23220 trivial. 0 not checked. [2023-11-29 01:49:51,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:51,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172756577] [2023-11-29 01:49:51,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:51,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551207287] [2023-11-29 01:49:51,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551207287] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:49:51,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:49:51,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-29 01:49:51,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735493090] [2023-11-29 01:49:51,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:49:51,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:49:51,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:51,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:49:51,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:49:51,218 INFO L87 Difference]: Start difference. First operand 1621 states and 2746 transitions. Second operand has 8 states, 8 states have (on average 26.125) internal successors, (209), 8 states have internal predecessors, (209), 3 states have call successors, (167), 2 states have call predecessors, (167), 4 states have return successors, (168), 3 states have call predecessors, (168), 3 states have call successors, (168) [2023-11-29 01:49:51,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:51,879 INFO L93 Difference]: Finished difference Result 3273 states and 5519 transitions. [2023-11-29 01:49:51,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:49:51,880 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 26.125) internal successors, (209), 8 states have internal predecessors, (209), 3 states have call successors, (167), 2 states have call predecessors, (167), 4 states have return successors, (168), 3 states have call predecessors, (168), 3 states have call successors, (168) Word has length 698 [2023-11-29 01:49:51,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:51,892 INFO L225 Difference]: With dead ends: 3273 [2023-11-29 01:49:51,892 INFO L226 Difference]: Without dead ends: 1653 [2023-11-29 01:49:51,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1398 GetRequests, 1388 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:49:51,898 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 667 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:51,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 1116 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:49:51,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2023-11-29 01:49:52,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1637. [2023-11-29 01:49:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1188 states have (on average 1.5808080808080809) internal successors, (1878), 1188 states have internal predecessors, (1878), 436 states have call successors, (436), 12 states have call predecessors, (436), 12 states have return successors, (436), 436 states have call predecessors, (436), 436 states have call successors, (436) [2023-11-29 01:49:52,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 2750 transitions. [2023-11-29 01:49:52,163 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 2750 transitions. Word has length 698 [2023-11-29 01:49:52,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:52,164 INFO L495 AbstractCegarLoop]: Abstraction has 1637 states and 2750 transitions. [2023-11-29 01:49:52,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.125) internal successors, (209), 8 states have internal predecessors, (209), 3 states have call successors, (167), 2 states have call predecessors, (167), 4 states have return successors, (168), 3 states have call predecessors, (168), 3 states have call successors, (168) [2023-11-29 01:49:52,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 2750 transitions. [2023-11-29 01:49:52,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2023-11-29 01:49:52,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:52,174 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:52,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:49:52,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:52,375 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:52,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:52,375 INFO L85 PathProgramCache]: Analyzing trace with hash -619933951, now seen corresponding path program 1 times [2023-11-29 01:49:52,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:52,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408753820] [2023-11-29 01:49:52,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:52,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:52,442 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:52,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142351829] [2023-11-29 01:49:52,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:52,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:52,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:52,444 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:52,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:49:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:52,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 1596 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:49:52,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-29 01:49:52,911 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:52,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:52,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408753820] [2023-11-29 01:49:52,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:52,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142351829] [2023-11-29 01:49:52,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142351829] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:52,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:52,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:49:52,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300415202] [2023-11-29 01:49:52,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:52,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:49:52,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:52,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:49:52,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:49:52,915 INFO L87 Difference]: Start difference. First operand 1637 states and 2750 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:53,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:53,149 INFO L93 Difference]: Finished difference Result 4405 states and 7412 transitions. [2023-11-29 01:49:53,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:49:53,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 699 [2023-11-29 01:49:53,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:53,169 INFO L225 Difference]: With dead ends: 4405 [2023-11-29 01:49:53,169 INFO L226 Difference]: Without dead ends: 2769 [2023-11-29 01:49:53,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 697 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 01:49:53,176 INFO L413 NwaCegarLoop]: 685 mSDtfsCounter, 340 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:53,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 1227 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:49:53,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2023-11-29 01:49:53,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 2763. [2023-11-29 01:49:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2763 states, 2146 states have (on average 1.6076421248835042) internal successors, (3450), 2150 states have internal predecessors, (3450), 596 states have call successors, (596), 20 states have call predecessors, (596), 20 states have return successors, (596), 592 states have call predecessors, (596), 596 states have call successors, (596) [2023-11-29 01:49:53,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2763 states to 2763 states and 4642 transitions. [2023-11-29 01:49:53,480 INFO L78 Accepts]: Start accepts. Automaton has 2763 states and 4642 transitions. Word has length 699 [2023-11-29 01:49:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:53,482 INFO L495 AbstractCegarLoop]: Abstraction has 2763 states and 4642 transitions. [2023-11-29 01:49:53,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:53,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2763 states and 4642 transitions. [2023-11-29 01:49:53,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2023-11-29 01:49:53,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:53,492 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:53,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 01:49:53,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 01:49:53,693 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:53,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:53,694 INFO L85 PathProgramCache]: Analyzing trace with hash 59338303, now seen corresponding path program 1 times [2023-11-29 01:49:53,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:53,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604759350] [2023-11-29 01:49:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:53,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:53,781 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:53,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506090435] [2023-11-29 01:49:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:53,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:53,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:53,783 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:53,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:49:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:54,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:49:54,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-29 01:49:54,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:54,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:54,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604759350] [2023-11-29 01:49:54,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:54,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506090435] [2023-11-29 01:49:54,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506090435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:54,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:54,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:49:54,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60699847] [2023-11-29 01:49:54,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:54,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:49:54,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:54,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:49:54,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:49:54,219 INFO L87 Difference]: Start difference. First operand 2763 states and 4642 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:54,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:54,468 INFO L93 Difference]: Finished difference Result 5557 states and 9347 transitions. [2023-11-29 01:49:54,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:49:54,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 699 [2023-11-29 01:49:54,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:54,491 INFO L225 Difference]: With dead ends: 5557 [2023-11-29 01:49:54,491 INFO L226 Difference]: Without dead ends: 2795 [2023-11-29 01:49:54,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 695 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:49:54,500 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 4 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2222 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:54,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2222 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:49:54,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2023-11-29 01:49:54,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 2787. [2023-11-29 01:49:54,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2170 states have (on average 1.6046082949308755) internal successors, (3482), 2174 states have internal predecessors, (3482), 596 states have call successors, (596), 20 states have call predecessors, (596), 20 states have return successors, (596), 592 states have call predecessors, (596), 596 states have call successors, (596) [2023-11-29 01:49:54,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4674 transitions. [2023-11-29 01:49:54,825 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4674 transitions. Word has length 699 [2023-11-29 01:49:54,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:54,826 INFO L495 AbstractCegarLoop]: Abstraction has 2787 states and 4674 transitions. [2023-11-29 01:49:54,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:54,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4674 transitions. [2023-11-29 01:49:54,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2023-11-29 01:49:54,836 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:54,836 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:54,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:49:55,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:55,037 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:55,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:55,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1899236483, now seen corresponding path program 1 times [2023-11-29 01:49:55,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:55,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148826651] [2023-11-29 01:49:55,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:55,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:55,122 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:55,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469215227] [2023-11-29 01:49:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:55,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:55,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:55,123 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:55,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:49:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:55,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:49:55,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-29 01:49:55,677 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:55,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:55,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148826651] [2023-11-29 01:49:55,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:55,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469215227] [2023-11-29 01:49:55,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469215227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:55,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:55,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:49:55,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270108988] [2023-11-29 01:49:55,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:55,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:49:55,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:55,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:49:55,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:49:55,681 INFO L87 Difference]: Start difference. First operand 2787 states and 4674 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:56,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:56,032 INFO L93 Difference]: Finished difference Result 8371 states and 14016 transitions. [2023-11-29 01:49:56,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:49:56,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 699 [2023-11-29 01:49:56,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:56,051 INFO L225 Difference]: With dead ends: 8371 [2023-11-29 01:49:56,051 INFO L226 Difference]: Without dead ends: 5585 [2023-11-29 01:49:56,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:49:56,058 INFO L413 NwaCegarLoop]: 893 mSDtfsCounter, 547 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 1963 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:56,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 1963 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:49:56,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5585 states. [2023-11-29 01:49:56,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5585 to 5523. [2023-11-29 01:49:56,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5523 states, 4290 states have (on average 1.5818181818181818) internal successors, (6786), 4298 states have internal predecessors, (6786), 1192 states have call successors, (1192), 40 states have call predecessors, (1192), 40 states have return successors, (1192), 1184 states have call predecessors, (1192), 1192 states have call successors, (1192) [2023-11-29 01:49:56,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5523 states to 5523 states and 9170 transitions. [2023-11-29 01:49:56,492 INFO L78 Accepts]: Start accepts. Automaton has 5523 states and 9170 transitions. Word has length 699 [2023-11-29 01:49:56,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:56,493 INFO L495 AbstractCegarLoop]: Abstraction has 5523 states and 9170 transitions. [2023-11-29 01:49:56,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:49:56,494 INFO L276 IsEmpty]: Start isEmpty. Operand 5523 states and 9170 transitions. [2023-11-29 01:49:56,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2023-11-29 01:49:56,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:56,503 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:56,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 01:49:56,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:56,703 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:56,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:56,704 INFO L85 PathProgramCache]: Analyzing trace with hash 594868320, now seen corresponding path program 1 times [2023-11-29 01:49:56,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:56,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763791255] [2023-11-29 01:49:56,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:56,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:56,784 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:56,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628790164] [2023-11-29 01:49:56,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:56,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:56,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:56,786 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:56,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:49:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:57,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:49:57,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 8910 proven. 243 refuted. 0 times theorem prover too weak. 14391 trivial. 0 not checked. [2023-11-29 01:49:57,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:49:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 81 proven. 243 refuted. 0 times theorem prover too weak. 23220 trivial. 0 not checked. [2023-11-29 01:49:58,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:58,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763791255] [2023-11-29 01:49:58,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:58,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628790164] [2023-11-29 01:49:58,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628790164] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:49:58,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:49:58,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-29 01:49:58,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209424796] [2023-11-29 01:49:58,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:49:58,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:49:58,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:58,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:49:58,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:49:58,230 INFO L87 Difference]: Start difference. First operand 5523 states and 9170 transitions. Second operand has 9 states, 9 states have (on average 19.77777777777778) internal successors, (178), 9 states have internal predecessors, (178), 2 states have call successors, (190), 2 states have call predecessors, (190), 4 states have return successors, (191), 2 states have call predecessors, (191), 2 states have call successors, (191) [2023-11-29 01:50:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:50:00,916 INFO L93 Difference]: Finished difference Result 22537 states and 37045 transitions. [2023-11-29 01:50:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 01:50:00,917 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.77777777777778) internal successors, (178), 9 states have internal predecessors, (178), 2 states have call successors, (190), 2 states have call predecessors, (190), 4 states have return successors, (191), 2 states have call predecessors, (191), 2 states have call successors, (191) Word has length 700 [2023-11-29 01:50:00,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:50:00,974 INFO L225 Difference]: With dead ends: 22537 [2023-11-29 01:50:00,974 INFO L226 Difference]: Without dead ends: 17015 [2023-11-29 01:50:00,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1418 GetRequests, 1392 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2023-11-29 01:50:00,992 INFO L413 NwaCegarLoop]: 829 mSDtfsCounter, 1685 mSDsluCounter, 2433 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1715 SdHoareTripleChecker+Valid, 3262 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:50:00,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1715 Valid, 3262 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 01:50:01,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17015 states. [2023-11-29 01:50:02,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17015 to 11139. [2023-11-29 01:50:02,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11139 states, 8642 states have (on average 1.548021291367739) internal successors, (13378), 8658 states have internal predecessors, (13378), 2384 states have call successors, (2384), 112 states have call predecessors, (2384), 112 states have return successors, (2384), 2368 states have call predecessors, (2384), 2384 states have call successors, (2384) [2023-11-29 01:50:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11139 states to 11139 states and 18146 transitions. [2023-11-29 01:50:02,429 INFO L78 Accepts]: Start accepts. Automaton has 11139 states and 18146 transitions. Word has length 700 [2023-11-29 01:50:02,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:50:02,430 INFO L495 AbstractCegarLoop]: Abstraction has 11139 states and 18146 transitions. [2023-11-29 01:50:02,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.77777777777778) internal successors, (178), 9 states have internal predecessors, (178), 2 states have call successors, (190), 2 states have call predecessors, (190), 4 states have return successors, (191), 2 states have call predecessors, (191), 2 states have call successors, (191) [2023-11-29 01:50:02,430 INFO L276 IsEmpty]: Start isEmpty. Operand 11139 states and 18146 transitions. [2023-11-29 01:50:02,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2023-11-29 01:50:02,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:50:02,446 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:02,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 01:50:02,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 01:50:02,647 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:50:02,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:50:02,648 INFO L85 PathProgramCache]: Analyzing trace with hash 241779938, now seen corresponding path program 1 times [2023-11-29 01:50:02,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:50:02,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306357211] [2023-11-29 01:50:02,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:02,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:50:02,723 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:50:02,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049898220] [2023-11-29 01:50:02,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:02,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:02,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:50:02,726 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:50:02,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:50:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:50:03,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:50:03,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:50:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 9687 proven. 531 refuted. 0 times theorem prover too weak. 13326 trivial. 0 not checked. [2023-11-29 01:50:04,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:50:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 96 proven. 228 refuted. 0 times theorem prover too weak. 23220 trivial. 0 not checked. [2023-11-29 01:50:05,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:50:05,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306357211] [2023-11-29 01:50:05,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:50:05,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049898220] [2023-11-29 01:50:05,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049898220] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:50:05,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:50:05,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-29 01:50:05,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706882719] [2023-11-29 01:50:05,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:50:05,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:50:05,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:50:05,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:50:05,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:50:05,544 INFO L87 Difference]: Start difference. First operand 11139 states and 18146 transitions. Second operand has 10 states, 10 states have (on average 23.6) internal successors, (236), 10 states have internal predecessors, (236), 4 states have call successors, (218), 3 states have call predecessors, (218), 5 states have return successors, (218), 4 states have call predecessors, (218), 4 states have call successors, (218) [2023-11-29 01:50:10,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:50:10,023 INFO L93 Difference]: Finished difference Result 61549 states and 99927 transitions. [2023-11-29 01:50:10,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 01:50:10,024 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 23.6) internal successors, (236), 10 states have internal predecessors, (236), 4 states have call successors, (218), 3 states have call predecessors, (218), 5 states have return successors, (218), 4 states have call predecessors, (218), 4 states have call successors, (218) Word has length 700 [2023-11-29 01:50:10,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:50:10,137 INFO L225 Difference]: With dead ends: 61549 [2023-11-29 01:50:10,137 INFO L226 Difference]: Without dead ends: 50411 [2023-11-29 01:50:10,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1404 GetRequests, 1390 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:50:10,165 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 2600 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2740 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 1917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:50:10,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2740 Valid, 2646 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 01:50:10,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50411 states. [2023-11-29 01:50:14,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50411 to 41555. [2023-11-29 01:50:14,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41555 states, 32914 states have (on average 1.5517409005286504) internal successors, (51074), 32994 states have internal predecessors, (51074), 8176 states have call successors, (8176), 464 states have call predecessors, (8176), 464 states have return successors, (8176), 8096 states have call predecessors, (8176), 8176 states have call successors, (8176) [2023-11-29 01:50:14,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41555 states to 41555 states and 67426 transitions. [2023-11-29 01:50:14,124 INFO L78 Accepts]: Start accepts. Automaton has 41555 states and 67426 transitions. Word has length 700 [2023-11-29 01:50:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:50:14,124 INFO L495 AbstractCegarLoop]: Abstraction has 41555 states and 67426 transitions. [2023-11-29 01:50:14,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.6) internal successors, (236), 10 states have internal predecessors, (236), 4 states have call successors, (218), 3 states have call predecessors, (218), 5 states have return successors, (218), 4 states have call predecessors, (218), 4 states have call successors, (218) [2023-11-29 01:50:14,125 INFO L276 IsEmpty]: Start isEmpty. Operand 41555 states and 67426 transitions. [2023-11-29 01:50:14,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2023-11-29 01:50:14,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:50:14,151 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:14,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 01:50:14,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 01:50:14,352 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:50:14,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:50:14,352 INFO L85 PathProgramCache]: Analyzing trace with hash 400754086, now seen corresponding path program 1 times [2023-11-29 01:50:14,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:50:14,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876840231] [2023-11-29 01:50:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:14,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:50:14,426 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:50:14,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887727049] [2023-11-29 01:50:14,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:14,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:14,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:50:14,428 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:50:14,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:50:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:50:14,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 01:50:14,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:50:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-29 01:50:16,874 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:50:16,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:50:16,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876840231] [2023-11-29 01:50:16,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:50:16,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887727049] [2023-11-29 01:50:16,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887727049] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:50:16,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:50:16,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:50:16,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149140064] [2023-11-29 01:50:16,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:50:16,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:50:16,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:50:16,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:50:16,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:50:16,877 INFO L87 Difference]: Start difference. First operand 41555 states and 67426 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:50:20,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:50:20,051 INFO L93 Difference]: Finished difference Result 97562 states and 159056 transitions. [2023-11-29 01:50:20,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:50:20,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 701 [2023-11-29 01:50:20,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:50:20,161 INFO L225 Difference]: With dead ends: 97562 [2023-11-29 01:50:20,161 INFO L226 Difference]: Without dead ends: 56008 [2023-11-29 01:50:20,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 698 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 01:50:20,201 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 519 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:50:20,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 1680 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:50:20,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56008 states. [2023-11-29 01:50:24,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56008 to 55622. [2023-11-29 01:50:24,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55622 states, 46867 states have (on average 1.5831181855036593) internal successors, (74196), 46947 states have internal predecessors, (74196), 8285 states have call successors, (8285), 469 states have call predecessors, (8285), 469 states have return successors, (8285), 8205 states have call predecessors, (8285), 8285 states have call successors, (8285) [2023-11-29 01:50:24,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55622 states to 55622 states and 90766 transitions. [2023-11-29 01:50:24,664 INFO L78 Accepts]: Start accepts. Automaton has 55622 states and 90766 transitions. Word has length 701 [2023-11-29 01:50:24,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:50:24,665 INFO L495 AbstractCegarLoop]: Abstraction has 55622 states and 90766 transitions. [2023-11-29 01:50:24,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:50:24,665 INFO L276 IsEmpty]: Start isEmpty. Operand 55622 states and 90766 transitions. [2023-11-29 01:50:24,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2023-11-29 01:50:24,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:50:24,697 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:24,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 01:50:24,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:24,898 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:50:24,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:50:24,899 INFO L85 PathProgramCache]: Analyzing trace with hash -2123822366, now seen corresponding path program 1 times [2023-11-29 01:50:24,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:50:24,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734619567] [2023-11-29 01:50:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:24,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:50:24,980 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:50:24,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737411992] [2023-11-29 01:50:24,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:24,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:24,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:50:24,982 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:50:24,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:50:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:50:25,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 01:50:25,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:50:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 12032 proven. 528 refuted. 0 times theorem prover too weak. 10984 trivial. 0 not checked. [2023-11-29 01:50:30,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:50:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-29 01:50:35,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:50:35,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734619567] [2023-11-29 01:50:35,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:50:35,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737411992] [2023-11-29 01:50:35,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737411992] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:50:35,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:50:35,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [21] total 30 [2023-11-29 01:50:35,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070147184] [2023-11-29 01:50:35,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:50:35,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:50:35,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:50:35,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:50:35,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:50:35,658 INFO L87 Difference]: Start difference. First operand 55622 states and 90766 transitions. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:51:08,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:51:08,339 INFO L93 Difference]: Finished difference Result 494836 states and 804075 transitions. [2023-11-29 01:51:08,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 01:51:08,340 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 703 [2023-11-29 01:51:08,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:51:09,324 INFO L225 Difference]: With dead ends: 494836 [2023-11-29 01:51:09,324 INFO L226 Difference]: Without dead ends: 446562 [2023-11-29 01:51:09,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1443 GetRequests, 1388 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=580, Invalid=2612, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 01:51:09,425 INFO L413 NwaCegarLoop]: 627 mSDtfsCounter, 6694 mSDsluCounter, 5019 mSDsCounter, 0 mSdLazyCounter, 3043 mSolverCounterSat, 2798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6694 SdHoareTripleChecker+Valid, 5646 SdHoareTripleChecker+Invalid, 5841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2798 IncrementalHoareTripleChecker+Valid, 3043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:51:09,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6694 Valid, 5646 Invalid, 5841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2798 Valid, 3043 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-11-29 01:51:09,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446562 states. [2023-11-29 01:51:33,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446562 to 287608. [2023-11-29 01:51:33,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287608 states, 246227 states have (on average 1.5835143993144538) internal successors, (389904), 247059 states have internal predecessors, (389904), 38365 states have call successors, (38365), 3015 states have call predecessors, (38365), 3015 states have return successors, (38365), 37533 states have call predecessors, (38365), 38365 states have call successors, (38365) [2023-11-29 01:51:34,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287608 states to 287608 states and 466634 transitions. [2023-11-29 01:51:34,536 INFO L78 Accepts]: Start accepts. Automaton has 287608 states and 466634 transitions. Word has length 703 [2023-11-29 01:51:34,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:51:34,536 INFO L495 AbstractCegarLoop]: Abstraction has 287608 states and 466634 transitions. [2023-11-29 01:51:34,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:51:34,537 INFO L276 IsEmpty]: Start isEmpty. Operand 287608 states and 466634 transitions. [2023-11-29 01:51:34,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2023-11-29 01:51:34,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:51:34,629 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:34,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 01:51:34,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:51:34,830 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:51:34,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:51:34,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1700175644, now seen corresponding path program 1 times [2023-11-29 01:51:34,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:51:34,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631410256] [2023-11-29 01:51:34,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:51:34,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:51:34,890 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:51:34,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240980294] [2023-11-29 01:51:34,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:51:34,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:51:34,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:51:34,892 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:51:34,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:51:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:51:35,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 01:51:35,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:51:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 11733 proven. 360 refuted. 0 times theorem prover too weak. 11451 trivial. 0 not checked. [2023-11-29 01:51:36,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:51:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 144 proven. 180 refuted. 0 times theorem prover too weak. 23220 trivial. 0 not checked. [2023-11-29 01:51:37,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:51:37,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631410256] [2023-11-29 01:51:37,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:51:37,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240980294] [2023-11-29 01:51:37,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240980294] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:51:37,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:51:37,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2023-11-29 01:51:37,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836041700] [2023-11-29 01:51:37,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:51:37,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 01:51:37,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:51:37,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 01:51:37,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:51:37,694 INFO L87 Difference]: Start difference. First operand 287608 states and 466634 transitions. Second operand has 19 states, 19 states have (on average 14.210526315789474) internal successors, (270), 19 states have internal predecessors, (270), 4 states have call successors, (170), 3 states have call predecessors, (170), 5 states have return successors, (171), 4 states have call predecessors, (171), 4 states have call successors, (171) [2023-11-29 01:52:43,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:52:43,465 INFO L93 Difference]: Finished difference Result 857450 states and 1377548 transitions. [2023-11-29 01:52:43,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-29 01:52:43,465 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 14.210526315789474) internal successors, (270), 19 states have internal predecessors, (270), 4 states have call successors, (170), 3 states have call predecessors, (170), 5 states have return successors, (171), 4 states have call predecessors, (171), 4 states have call successors, (171) Word has length 703 [2023-11-29 01:52:43,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:52:45,210 INFO L225 Difference]: With dead ends: 857450 [2023-11-29 01:52:45,210 INFO L226 Difference]: Without dead ends: 638696 [2023-11-29 01:52:45,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1459 GetRequests, 1396 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1022, Invalid=3138, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 01:52:45,496 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 6333 mSDsluCounter, 3346 mSDsCounter, 0 mSdLazyCounter, 2905 mSolverCounterSat, 2237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6381 SdHoareTripleChecker+Valid, 3829 SdHoareTripleChecker+Invalid, 5142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2237 IncrementalHoareTripleChecker+Valid, 2905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:52:45,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6381 Valid, 3829 Invalid, 5142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2237 Valid, 2905 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 01:52:45,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638696 states. [2023-11-29 01:53:10,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638696 to 233876. [2023-11-29 01:53:10,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233876 states, 205437 states have (on average 1.595379605426481) internal successors, (327750), 205965 states have internal predecessors, (327750), 26301 states have call successors, (26301), 2137 states have call predecessors, (26301), 2137 states have return successors, (26301), 25773 states have call predecessors, (26301), 26301 states have call successors, (26301) [2023-11-29 01:53:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233876 states to 233876 states and 380352 transitions. [2023-11-29 01:53:11,718 INFO L78 Accepts]: Start accepts. Automaton has 233876 states and 380352 transitions. Word has length 703 [2023-11-29 01:53:11,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:53:11,719 INFO L495 AbstractCegarLoop]: Abstraction has 233876 states and 380352 transitions. [2023-11-29 01:53:11,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 14.210526315789474) internal successors, (270), 19 states have internal predecessors, (270), 4 states have call successors, (170), 3 states have call predecessors, (170), 5 states have return successors, (171), 4 states have call predecessors, (171), 4 states have call successors, (171) [2023-11-29 01:53:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand 233876 states and 380352 transitions. [2023-11-29 01:53:12,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2023-11-29 01:53:12,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:53:12,040 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:12,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 01:53:12,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:53:12,241 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:53:12,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:53:12,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1534132708, now seen corresponding path program 1 times [2023-11-29 01:53:12,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:53:12,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041973796] [2023-11-29 01:53:12,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:53:12,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:53:12,311 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:53:12,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544961237] [2023-11-29 01:53:12,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:53:12,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:53:12,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:53:12,312 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:53:12,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:53:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:53:13,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 01:53:13,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:53:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 12939 proven. 303 refuted. 0 times theorem prover too weak. 10302 trivial. 0 not checked. [2023-11-29 01:53:15,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:53:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 651 proven. 312 refuted. 0 times theorem prover too weak. 22581 trivial. 0 not checked. [2023-11-29 01:53:18,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:53:18,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041973796] [2023-11-29 01:53:18,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:53:18,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544961237] [2023-11-29 01:53:18,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544961237] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:53:18,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:53:18,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-11-29 01:53:18,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099279020] [2023-11-29 01:53:18,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:53:18,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 01:53:18,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:53:18,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 01:53:18,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2023-11-29 01:53:18,442 INFO L87 Difference]: Start difference. First operand 233876 states and 380352 transitions. Second operand has 26 states, 25 states have (on average 12.52) internal successors, (313), 24 states have internal predecessors, (313), 8 states have call successors, (218), 5 states have call predecessors, (218), 10 states have return successors, (218), 8 states have call predecessors, (218), 8 states have call successors, (218) [2023-11-29 01:55:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:46,574 INFO L93 Difference]: Finished difference Result 1634179 states and 2629536 transitions. [2023-11-29 01:55:46,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-29 01:55:46,574 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 12.52) internal successors, (313), 24 states have internal predecessors, (313), 8 states have call successors, (218), 5 states have call predecessors, (218), 10 states have return successors, (218), 8 states have call predecessors, (218), 8 states have call successors, (218) Word has length 703 [2023-11-29 01:55:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:49,675 INFO L225 Difference]: With dead ends: 1634179 [2023-11-29 01:55:49,675 INFO L226 Difference]: Without dead ends: 1406297 [2023-11-29 01:55:50,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1506 GetRequests, 1396 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4705 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3223, Invalid=9209, Unknown=0, NotChecked=0, Total=12432 [2023-11-29 01:55:50,227 INFO L413 NwaCegarLoop]: 839 mSDtfsCounter, 9666 mSDsluCounter, 5923 mSDsCounter, 0 mSdLazyCounter, 4763 mSolverCounterSat, 3023 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9723 SdHoareTripleChecker+Valid, 6762 SdHoareTripleChecker+Invalid, 7786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3023 IncrementalHoareTripleChecker+Valid, 4763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:50,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9723 Valid, 6762 Invalid, 7786 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3023 Valid, 4763 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-11-29 01:55:51,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406297 states. [2023-11-29 01:56:54,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406297 to 584883. [2023-11-29 01:56:55,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584883 states, 520253 states have (on average 1.5988240336913002) internal successors, (831793), 521741 states have internal predecessors, (831793), 59829 states have call successors, (59829), 4800 states have call predecessors, (59829), 4800 states have return successors, (59829), 58341 states have call predecessors, (59829), 59829 states have call successors, (59829) [2023-11-29 01:56:57,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584883 states to 584883 states and 951451 transitions. [2023-11-29 01:56:57,318 INFO L78 Accepts]: Start accepts. Automaton has 584883 states and 951451 transitions. Word has length 703 [2023-11-29 01:56:57,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:57,319 INFO L495 AbstractCegarLoop]: Abstraction has 584883 states and 951451 transitions. [2023-11-29 01:56:57,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 12.52) internal successors, (313), 24 states have internal predecessors, (313), 8 states have call successors, (218), 5 states have call predecessors, (218), 10 states have return successors, (218), 8 states have call predecessors, (218), 8 states have call successors, (218) [2023-11-29 01:56:57,319 INFO L276 IsEmpty]: Start isEmpty. Operand 584883 states and 951451 transitions. [2023-11-29 01:56:57,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2023-11-29 01:56:57,405 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:57,405 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:56:57,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 01:56:57,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:56:57,606 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:56:57,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:57,607 INFO L85 PathProgramCache]: Analyzing trace with hash -105667740, now seen corresponding path program 1 times [2023-11-29 01:56:57,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:57,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000661132] [2023-11-29 01:56:57,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:57,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:57,661 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:56:57,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508705295] [2023-11-29 01:56:57,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:57,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:57,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:56:57,663 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:56:57,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 01:56:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:58,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 01:56:58,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 12383 proven. 891 refuted. 0 times theorem prover too weak. 10270 trivial. 0 not checked. [2023-11-29 01:57:02,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:04,087 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-29 01:57:04,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:04,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000661132] [2023-11-29 01:57:04,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:57:04,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508705295] [2023-11-29 01:57:04,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508705295] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:57:04,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:57:04,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [24] total 30 [2023-11-29 01:57:04,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526703502] [2023-11-29 01:57:04,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:57:04,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:57:04,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:04,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:57:04,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:57:04,091 INFO L87 Difference]: Start difference. First operand 584883 states and 951451 transitions. Second operand has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 01:58:48,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:48,202 INFO L93 Difference]: Finished difference Result 1511395 states and 2456322 transitions. [2023-11-29 01:58:48,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:58:48,203 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 703 [2023-11-29 01:58:48,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:50,834 INFO L225 Difference]: With dead ends: 1511395 [2023-11-29 01:58:50,835 INFO L226 Difference]: Without dead ends: 994045 [2023-11-29 01:58:51,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1410 GetRequests, 1378 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 01:58:51,319 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 1790 mSDsluCounter, 2675 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1790 SdHoareTripleChecker+Valid, 3337 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:51,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1790 Valid, 3337 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 01:58:51,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994045 states. [2023-11-29 02:00:24,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994045 to 730547. [2023-11-29 02:00:24,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730547 states, 640884 states have (on average 1.5865897728762148) internal successors, (1016820), 643044 states have internal predecessors, (1016820), 82829 states have call successors, (82829), 6833 states have call predecessors, (82829), 6833 states have return successors, (82829), 80669 states have call predecessors, (82829), 82829 states have call successors, (82829) [2023-11-29 02:00:28,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730547 states to 730547 states and 1182478 transitions. [2023-11-29 02:00:28,209 INFO L78 Accepts]: Start accepts. Automaton has 730547 states and 1182478 transitions. Word has length 703 [2023-11-29 02:00:28,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:00:28,210 INFO L495 AbstractCegarLoop]: Abstraction has 730547 states and 1182478 transitions. [2023-11-29 02:00:28,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-29 02:00:28,210 INFO L276 IsEmpty]: Start isEmpty. Operand 730547 states and 1182478 transitions. [2023-11-29 02:00:28,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 705 [2023-11-29 02:00:28,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:00:28,315 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:28,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 02:00:28,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:28,516 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:00:28,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:28,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1223352879, now seen corresponding path program 1 times [2023-11-29 02:00:28,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:28,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014686314] [2023-11-29 02:00:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:28,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:28,569 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:00:28,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142005068] [2023-11-29 02:00:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:28,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:28,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:28,571 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:28,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b79a751-593e-40f3-a244-704b535d13a8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 02:00:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:29,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 02:00:29,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 12409 proven. 372 refuted. 0 times theorem prover too weak. 10763 trivial. 0 not checked. [2023-11-29 02:00:30,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:00:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-29 02:00:31,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:31,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014686314] [2023-11-29 02:00:31,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:00:31,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142005068] [2023-11-29 02:00:31,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142005068] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:31,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:00:31,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2023-11-29 02:00:31,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103916096] [2023-11-29 02:00:31,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:31,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:00:31,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:31,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:00:31,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:00:31,922 INFO L87 Difference]: Start difference. First operand 730547 states and 1182478 transitions. Second operand has 5 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109)