./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-61.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/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_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-61.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/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_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/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 8b8a406c144f266572450899d8c7afaa2568fa95a8ff7a55e7650366092dda7c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:35:35,368 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:35:35,432 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:35:35,436 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:35:35,437 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:35:35,460 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:35:35,460 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:35:35,461 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:35:35,462 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:35:35,462 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:35:35,463 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:35:35,463 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:35:35,464 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:35:35,464 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:35:35,465 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:35:35,465 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:35:35,466 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:35:35,466 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:35:35,467 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:35:35,467 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:35:35,468 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:35:35,471 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:35:35,471 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:35:35,471 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:35:35,472 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:35:35,472 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:35:35,473 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:35:35,473 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:35:35,474 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:35:35,474 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:35:35,474 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:35:35,475 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:35:35,475 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:35:35,475 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:35:35,475 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:35:35,476 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:35:35,476 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:35:35,476 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:35:35,476 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:35:35,476 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:35:35,476 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:35:35,477 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:35:35,477 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_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b8a406c144f266572450899d8c7afaa2568fa95a8ff7a55e7650366092dda7c [2023-11-29 02:35:35,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:35:35,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:35:35,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:35:35,728 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:35:35,729 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:35:35,730 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-61.i [2023-11-29 02:35:38,500 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:35:38,695 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:35:38,696 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-61.i [2023-11-29 02:35:38,703 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/data/7904f164f/07dd03381a454b48b426f87a8367f8dc/FLAGcbcbe4a76 [2023-11-29 02:35:38,714 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/data/7904f164f/07dd03381a454b48b426f87a8367f8dc [2023-11-29 02:35:38,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:35:38,717 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:35:38,718 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:35:38,719 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:35:38,723 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:35:38,724 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:35:38" (1/1) ... [2023-11-29 02:35:38,725 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34346a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:38, skipping insertion in model container [2023-11-29 02:35:38,725 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:35:38" (1/1) ... [2023-11-29 02:35:38,759 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:35:38,876 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_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-61.i[919,932] [2023-11-29 02:35:38,939 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:35:38,949 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:35:38,961 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_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-61.i[919,932] [2023-11-29 02:35:38,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:35:39,013 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:35:39,014 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:39 WrapperNode [2023-11-29 02:35:39,014 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:35:39,015 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:35:39,015 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:35:39,015 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:35:39,023 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:39" (1/1) ... [2023-11-29 02:35:39,035 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:39" (1/1) ... [2023-11-29 02:35:39,071 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 272 [2023-11-29 02:35:39,071 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:35:39,072 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:35:39,072 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:35:39,072 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:35:39,084 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:39" (1/1) ... [2023-11-29 02:35:39,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:39" (1/1) ... [2023-11-29 02:35:39,088 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:39" (1/1) ... [2023-11-29 02:35:39,104 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 02:35:39,104 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:39" (1/1) ... [2023-11-29 02:35:39,104 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:39" (1/1) ... [2023-11-29 02:35:39,116 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:39" (1/1) ... [2023-11-29 02:35:39,121 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:39" (1/1) ... [2023-11-29 02:35:39,123 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:39" (1/1) ... [2023-11-29 02:35:39,126 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:39" (1/1) ... [2023-11-29 02:35:39,131 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:35:39,132 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:35:39,132 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:35:39,132 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:35:39,133 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:39" (1/1) ... [2023-11-29 02:35:39,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:35:39,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:39,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:35:39,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:35:39,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:35:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 02:35:39,203 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 02:35:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:35:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:35:39,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:35:39,332 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:35:39,334 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:35:39,715 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:35:39,752 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:35:39,752 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 02:35:39,752 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:35:39 BoogieIcfgContainer [2023-11-29 02:35:39,753 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:35:39,755 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:35:39,755 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:35:39,759 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:35:39,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:35:38" (1/3) ... [2023-11-29 02:35:39,760 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a7fa60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:35:39, skipping insertion in model container [2023-11-29 02:35:39,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:39" (2/3) ... [2023-11-29 02:35:39,760 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a7fa60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:35:39, skipping insertion in model container [2023-11-29 02:35:39,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:35:39" (3/3) ... [2023-11-29 02:35:39,762 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pe-cn_file-61.i [2023-11-29 02:35:39,780 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:35:39,781 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:35:39,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:35:39,842 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;@55bbfdd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:35:39,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:35:39,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 120 states, 75 states have (on average 1.5066666666666666) internal successors, (113), 76 states have internal predecessors, (113), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 02:35:39,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-11-29 02:35:39,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:39,865 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:35:39,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:35:39,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:39,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1258861963, now seen corresponding path program 1 times [2023-11-29 02:35:39,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:39,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783866178] [2023-11-29 02:35:39,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:39,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:40,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:40,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783866178] [2023-11-29 02:35:40,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 02:35:40,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061283772] [2023-11-29 02:35:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:40,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:40,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:40,125 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:40,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:35:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:40,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 02:35:40,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 3362 trivial. 0 not checked. [2023-11-29 02:35:40,441 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:35:40,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061283772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:35:40,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:35:40,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:35:40,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883534965] [2023-11-29 02:35:40,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:35:40,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 02:35:40,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:40,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 02:35:40,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:35:40,483 INFO L87 Difference]: Start difference. First operand has 120 states, 75 states have (on average 1.5066666666666666) internal successors, (113), 76 states have internal predecessors, (113), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 2 states have call successors, (42) [2023-11-29 02:35:40,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:40,535 INFO L93 Difference]: Finished difference Result 237 states and 434 transitions. [2023-11-29 02:35:40,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 02:35:40,538 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 2 states have call successors, (42) Word has length 260 [2023-11-29 02:35:40,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:40,547 INFO L225 Difference]: With dead ends: 237 [2023-11-29 02:35:40,547 INFO L226 Difference]: Without dead ends: 118 [2023-11-29 02:35:40,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:35:40,554 INFO L413 NwaCegarLoop]: 187 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, 187 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:40,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 187 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:35:40,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-29 02:35:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2023-11-29 02:35:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 74 states have internal predecessors, (106), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 02:35:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 190 transitions. [2023-11-29 02:35:40,605 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 190 transitions. Word has length 260 [2023-11-29 02:35:40,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:40,605 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 190 transitions. [2023-11-29 02:35:40,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 2 states have call successors, (42) [2023-11-29 02:35:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 190 transitions. [2023-11-29 02:35:40,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-11-29 02:35:40,613 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:40,613 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:35:40,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:35:40,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 02:35:40,819 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:35:40,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:40,820 INFO L85 PathProgramCache]: Analyzing trace with hash 745418421, now seen corresponding path program 1 times [2023-11-29 02:35:40,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:40,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903997317] [2023-11-29 02:35:40,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:40,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:40,894 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:35:40,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742694567] [2023-11-29 02:35:40,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:40,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:40,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:40,896 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:40,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:35:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:41,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:35:41,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-29 02:35:41,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:35:41,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:41,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903997317] [2023-11-29 02:35:41,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:35:41,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742694567] [2023-11-29 02:35:41,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742694567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:35:41,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:35:41,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:35:41,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877127080] [2023-11-29 02:35:41,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:35:41,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:35:41,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:41,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:35:41,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:35:41,140 INFO L87 Difference]: Start difference. First operand 118 states and 190 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-29 02:35:41,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:41,179 INFO L93 Difference]: Finished difference Result 235 states and 379 transitions. [2023-11-29 02:35:41,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:35:41,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 260 [2023-11-29 02:35:41,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:41,184 INFO L225 Difference]: With dead ends: 235 [2023-11-29 02:35:41,185 INFO L226 Difference]: Without dead ends: 118 [2023-11-29 02:35:41,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:35:41,188 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 58 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:41,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 311 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:35:41,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-29 02:35:41,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2023-11-29 02:35:41,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 74 states have (on average 1.4189189189189189) internal successors, (105), 74 states have internal predecessors, (105), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 02:35:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 189 transitions. [2023-11-29 02:35:41,207 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 189 transitions. Word has length 260 [2023-11-29 02:35:41,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:41,209 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 189 transitions. [2023-11-29 02:35:41,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-29 02:35:41,210 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 189 transitions. [2023-11-29 02:35:41,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-11-29 02:35:41,214 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:41,215 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:35:41,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:35:41,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:41,421 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:35:41,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:41,422 INFO L85 PathProgramCache]: Analyzing trace with hash 807458035, now seen corresponding path program 1 times [2023-11-29 02:35:41,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:41,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23375730] [2023-11-29 02:35:41,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:41,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:41,481 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:35:41,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774451621] [2023-11-29 02:35:41,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:41,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:41,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:41,483 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:41,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:35:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:41,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:35:41,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-29 02:35:42,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:35:42,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:42,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23375730] [2023-11-29 02:35:42,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:35:42,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774451621] [2023-11-29 02:35:42,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774451621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:35:42,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:35:42,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:35:42,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838422655] [2023-11-29 02:35:42,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:35:42,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:35:42,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:42,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:35:42,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:35:42,113 INFO L87 Difference]: Start difference. First operand 118 states and 189 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-29 02:35:42,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:42,420 INFO L93 Difference]: Finished difference Result 351 states and 563 transitions. [2023-11-29 02:35:42,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:35:42,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 260 [2023-11-29 02:35:42,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:42,426 INFO L225 Difference]: With dead ends: 351 [2023-11-29 02:35:42,426 INFO L226 Difference]: Without dead ends: 234 [2023-11-29 02:35:42,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:35:42,428 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 177 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:42,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 511 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:35:42,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-29 02:35:42,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 155. [2023-11-29 02:35:42,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 111 states have (on average 1.5045045045045045) internal successors, (167), 111 states have internal predecessors, (167), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 02:35:42,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 251 transitions. [2023-11-29 02:35:42,466 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 251 transitions. Word has length 260 [2023-11-29 02:35:42,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:42,467 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 251 transitions. [2023-11-29 02:35:42,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-29 02:35:42,468 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 251 transitions. [2023-11-29 02:35:42,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-11-29 02:35:42,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:42,472 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:35:42,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:35:42,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:42,673 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:35:42,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:42,673 INFO L85 PathProgramCache]: Analyzing trace with hash 673444529, now seen corresponding path program 1 times [2023-11-29 02:35:42,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:42,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566829587] [2023-11-29 02:35:42,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:42,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:42,720 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:35:42,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118360264] [2023-11-29 02:35:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:42,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:42,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:42,722 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:42,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:35:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:42,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:35:42,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-29 02:35:43,005 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:35:43,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:43,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566829587] [2023-11-29 02:35:43,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:35:43,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118360264] [2023-11-29 02:35:43,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118360264] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:35:43,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:35:43,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:35:43,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615243575] [2023-11-29 02:35:43,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:35:43,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:35:43,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:43,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:35:43,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:35:43,008 INFO L87 Difference]: Start difference. First operand 155 states and 251 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-29 02:35:43,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:43,146 INFO L93 Difference]: Finished difference Result 388 states and 621 transitions. [2023-11-29 02:35:43,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:35:43,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 260 [2023-11-29 02:35:43,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:43,151 INFO L225 Difference]: With dead ends: 388 [2023-11-29 02:35:43,151 INFO L226 Difference]: Without dead ends: 234 [2023-11-29 02:35:43,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:35:43,153 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 187 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:43,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 520 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:35:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-29 02:35:43,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 155. [2023-11-29 02:35:43,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 111 states have (on average 1.4954954954954955) internal successors, (166), 111 states have internal predecessors, (166), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 02:35:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 250 transitions. [2023-11-29 02:35:43,191 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 250 transitions. Word has length 260 [2023-11-29 02:35:43,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:43,192 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 250 transitions. [2023-11-29 02:35:43,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-29 02:35:43,193 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 250 transitions. [2023-11-29 02:35:43,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2023-11-29 02:35:43,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:43,197 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:35:43,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:35:43,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:43,403 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:35:43,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:43,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1007429972, now seen corresponding path program 1 times [2023-11-29 02:35:43,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:43,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22524845] [2023-11-29 02:35:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:43,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:43,447 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:35:43,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566243736] [2023-11-29 02:35:43,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:43,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:43,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:43,449 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:43,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:35:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:43,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:35:43,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-29 02:35:43,920 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:35:43,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:43,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22524845] [2023-11-29 02:35:43,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:35:43,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566243736] [2023-11-29 02:35:43,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566243736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:35:43,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:35:43,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:35:43,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732133484] [2023-11-29 02:35:43,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:35:43,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:35:43,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:43,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:35:43,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:35:43,924 INFO L87 Difference]: Start difference. First operand 155 states and 250 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-29 02:35:44,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:44,126 INFO L93 Difference]: Finished difference Result 309 states and 499 transitions. [2023-11-29 02:35:44,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:35:44,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 262 [2023-11-29 02:35:44,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:44,130 INFO L225 Difference]: With dead ends: 309 [2023-11-29 02:35:44,130 INFO L226 Difference]: Without dead ends: 155 [2023-11-29 02:35:44,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:35:44,132 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 125 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:44,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 225 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:35:44,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-29 02:35:44,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2023-11-29 02:35:44,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 111 states have (on average 1.4774774774774775) internal successors, (164), 111 states have internal predecessors, (164), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 02:35:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 248 transitions. [2023-11-29 02:35:44,159 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 248 transitions. Word has length 262 [2023-11-29 02:35:44,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:44,160 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 248 transitions. [2023-11-29 02:35:44,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-29 02:35:44,160 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 248 transitions. [2023-11-29 02:35:44,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2023-11-29 02:35:44,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:44,163 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:35:44,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 02:35:44,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:44,364 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:35:44,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:44,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1141443478, now seen corresponding path program 1 times [2023-11-29 02:35:44,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:44,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217838833] [2023-11-29 02:35:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:44,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:44,410 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:35:44,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357942247] [2023-11-29 02:35:44,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:44,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:44,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:44,412 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:44,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:35:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:44,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:35:44,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:44,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-29 02:35:44,968 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:35:44,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:44,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217838833] [2023-11-29 02:35:44,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:35:44,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357942247] [2023-11-29 02:35:44,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357942247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:35:44,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:35:44,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:35:44,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120489243] [2023-11-29 02:35:44,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:35:44,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:35:44,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:44,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:35:44,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:35:44,971 INFO L87 Difference]: Start difference. First operand 155 states and 248 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-29 02:35:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:45,509 INFO L93 Difference]: Finished difference Result 690 states and 1101 transitions. [2023-11-29 02:35:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:35:45,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 262 [2023-11-29 02:35:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:45,515 INFO L225 Difference]: With dead ends: 690 [2023-11-29 02:35:45,515 INFO L226 Difference]: Without dead ends: 536 [2023-11-29 02:35:45,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:35:45,517 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 384 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:45,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 850 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:35:45,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2023-11-29 02:35:45,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 385. [2023-11-29 02:35:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 270 states have (on average 1.4666666666666666) internal successors, (396), 271 states have internal predecessors, (396), 111 states have call successors, (111), 3 states have call predecessors, (111), 3 states have return successors, (111), 110 states have call predecessors, (111), 111 states have call successors, (111) [2023-11-29 02:35:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 618 transitions. [2023-11-29 02:35:45,613 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 618 transitions. Word has length 262 [2023-11-29 02:35:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:45,614 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 618 transitions. [2023-11-29 02:35:45,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-29 02:35:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 618 transitions. [2023-11-29 02:35:45,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2023-11-29 02:35:45,617 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:45,617 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:35:45,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:35:45,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 02:35:45,818 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:35:45,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:45,819 INFO L85 PathProgramCache]: Analyzing trace with hash 633563884, now seen corresponding path program 1 times [2023-11-29 02:35:45,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:45,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993848926] [2023-11-29 02:35:45,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:45,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:45,854 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:35:45,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345247388] [2023-11-29 02:35:45,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:45,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:45,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:45,856 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:45,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:35:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:46,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:35:46,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1733 proven. 138 refuted. 0 times theorem prover too weak. 1573 trivial. 0 not checked. [2023-11-29 02:35:47,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:35:55,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:55,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993848926] [2023-11-29 02:35:55,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:35:55,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345247388] [2023-11-29 02:35:55,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345247388] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:35:55,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:35:55,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-29 02:35:55,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504202724] [2023-11-29 02:35:55,546 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:35:55,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:35:55,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:55,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:35:55,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:35:55,547 INFO L87 Difference]: Start difference. First operand 385 states and 618 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 3 states have call successors, (42), 3 states have call predecessors, (42), 4 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2023-11-29 02:36:00,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:36:04,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:36:08,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:36:12,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:36:13,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:36:17,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:36:21,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:36:30,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:36:38,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:36:42,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:36:54,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:37:00,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:37:04,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:37:08,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:37:08,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 139 [2023-11-29 02:37:08,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:37:08,569 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 36 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 76 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:37:08,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 108 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 170 Invalid, 12 Unknown, 0 Unchecked, 52.3s Time] [2023-11-29 02:37:08,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:37:08,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:08,770 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:665) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:269) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:365) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 36 more [2023-11-29 02:37:08,772 INFO L158 Benchmark]: Toolchain (without parser) took 90055.11ms. Allocated memory was 136.3MB in the beginning and 270.5MB in the end (delta: 134.2MB). Free memory was 91.7MB in the beginning and 113.9MB in the end (delta: -22.2MB). Peak memory consumption was 114.2MB. Max. memory is 16.1GB. [2023-11-29 02:37:08,773 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 136.3MB. Free memory is still 109.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 02:37:08,773 INFO L158 Benchmark]: CACSL2BoogieTranslator took 295.74ms. Allocated memory is still 136.3MB. Free memory was 91.3MB in the beginning and 76.1MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-29 02:37:08,773 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.74ms. Allocated memory is still 136.3MB. Free memory was 76.1MB in the beginning and 72.4MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 02:37:08,773 INFO L158 Benchmark]: Boogie Preprocessor took 59.06ms. Allocated memory is still 136.3MB. Free memory was 72.4MB in the beginning and 68.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 02:37:08,773 INFO L158 Benchmark]: RCFGBuilder took 620.62ms. Allocated memory was 136.3MB in the beginning and 186.6MB in the end (delta: 50.3MB). Free memory was 68.2MB in the beginning and 132.9MB in the end (delta: -64.7MB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. [2023-11-29 02:37:08,774 INFO L158 Benchmark]: TraceAbstraction took 89016.78ms. Allocated memory was 186.6MB in the beginning and 270.5MB in the end (delta: 83.9MB). Free memory was 132.9MB in the beginning and 113.9MB in the end (delta: 19.0MB). Peak memory consumption was 102.8MB. Max. memory is 16.1GB. [2023-11-29 02:37:08,775 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 136.3MB. Free memory is still 109.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 295.74ms. Allocated memory is still 136.3MB. Free memory was 91.3MB in the beginning and 76.1MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.74ms. Allocated memory is still 136.3MB. Free memory was 76.1MB in the beginning and 72.4MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.06ms. Allocated memory is still 136.3MB. Free memory was 72.4MB in the beginning and 68.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 620.62ms. Allocated memory was 136.3MB in the beginning and 186.6MB in the end (delta: 50.3MB). Free memory was 68.2MB in the beginning and 132.9MB in the end (delta: -64.7MB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. * TraceAbstraction took 89016.78ms. Allocated memory was 186.6MB in the beginning and 270.5MB in the end (delta: 83.9MB). Free memory was 132.9MB in the beginning and 113.9MB in the end (delta: 19.0MB). Peak memory consumption was 102.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/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_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-61.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/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 8b8a406c144f266572450899d8c7afaa2568fa95a8ff7a55e7650366092dda7c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:37:10,409 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:37:10,475 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-29 02:37:10,479 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:37:10,486 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:37:10,513 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:37:10,514 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:37:10,515 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:37:10,515 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:37:10,516 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:37:10,516 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:37:10,517 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:37:10,518 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:37:10,518 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:37:10,519 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:37:10,519 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:37:10,520 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:37:10,520 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:37:10,521 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:37:10,521 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:37:10,522 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:37:10,526 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:37:10,526 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:37:10,527 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 02:37:10,527 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 02:37:10,527 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 02:37:10,528 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:37:10,528 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:37:10,528 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:37:10,529 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:37:10,529 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:37:10,530 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:37:10,530 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:37:10,530 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:37:10,531 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:37:10,531 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:37:10,531 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:37:10,531 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 02:37:10,532 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 02:37:10,532 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:37:10,532 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:37:10,532 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:37:10,533 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:37:10,533 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:37:10,533 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 02:37:10,533 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_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b8a406c144f266572450899d8c7afaa2568fa95a8ff7a55e7650366092dda7c [2023-11-29 02:37:10,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:37:10,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:37:10,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:37:10,832 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:37:10,832 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:37:10,834 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-61.i [2023-11-29 02:37:13,628 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:37:13,833 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:37:13,834 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-61.i [2023-11-29 02:37:13,844 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/data/33bda088a/2d0121578e9d4457be7c09a267ea49a4/FLAGd14b51044 [2023-11-29 02:37:13,858 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/data/33bda088a/2d0121578e9d4457be7c09a267ea49a4 [2023-11-29 02:37:13,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:37:13,862 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:37:13,864 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:37:13,864 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:37:13,869 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:37:13,870 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:37:13" (1/1) ... [2023-11-29 02:37:13,871 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70dfcbc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:13, skipping insertion in model container [2023-11-29 02:37:13,871 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:37:13" (1/1) ... [2023-11-29 02:37:13,907 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:37:14,059 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_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-61.i[919,932] [2023-11-29 02:37:14,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:37:14,155 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:37:14,168 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_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-61.i[919,932] [2023-11-29 02:37:14,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:37:14,219 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:37:14,220 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:14 WrapperNode [2023-11-29 02:37:14,220 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:37:14,221 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:37:14,221 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:37:14,221 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:37:14,228 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:14" (1/1) ... [2023-11-29 02:37:14,242 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:14" (1/1) ... [2023-11-29 02:37:14,271 INFO L138 Inliner]: procedures = 27, calls = 55, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 236 [2023-11-29 02:37:14,272 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:37:14,272 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:37:14,272 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:37:14,273 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:37:14,284 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:14" (1/1) ... [2023-11-29 02:37:14,284 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:14" (1/1) ... [2023-11-29 02:37:14,289 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:14" (1/1) ... [2023-11-29 02:37:14,303 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 02:37:14,304 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:14" (1/1) ... [2023-11-29 02:37:14,304 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:14" (1/1) ... [2023-11-29 02:37:14,315 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:14" (1/1) ... [2023-11-29 02:37:14,320 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:14" (1/1) ... [2023-11-29 02:37:14,323 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:14" (1/1) ... [2023-11-29 02:37:14,325 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:14" (1/1) ... [2023-11-29 02:37:14,330 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:37:14,331 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:37:14,331 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:37:14,331 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:37:14,332 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:14" (1/1) ... [2023-11-29 02:37:14,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:37:14,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:14,358 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:37:14,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:37:14,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:37:14,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 02:37:14,388 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 02:37:14,388 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 02:37:14,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:37:14,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:37:14,480 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:37:14,482 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:37:15,259 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:37:15,304 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:37:15,304 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 02:37:15,304 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:37:15 BoogieIcfgContainer [2023-11-29 02:37:15,304 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:37:15,307 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:37:15,307 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:37:15,309 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:37:15,309 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:37:13" (1/3) ... [2023-11-29 02:37:15,310 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eafcc45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:37:15, skipping insertion in model container [2023-11-29 02:37:15,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:14" (2/3) ... [2023-11-29 02:37:15,311 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eafcc45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:37:15, skipping insertion in model container [2023-11-29 02:37:15,311 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:37:15" (3/3) ... [2023-11-29 02:37:15,312 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pe-cn_file-61.i [2023-11-29 02:37:15,326 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:37:15,326 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:37:15,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:37:15,373 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;@394d023, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:37:15,373 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:37:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 61 states have internal predecessors, (88), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 02:37:15,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-11-29 02:37:15,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:37:15,396 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:15,397 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:37:15,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:15,402 INFO L85 PathProgramCache]: Analyzing trace with hash -76661277, now seen corresponding path program 1 times [2023-11-29 02:37:15,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:37:15,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524989439] [2023-11-29 02:37:15,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:15,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:37:15,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:37:15,454 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:37:15,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-29 02:37:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:15,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 02:37:15,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1402 proven. 0 refuted. 0 times theorem prover too weak. 2042 trivial. 0 not checked. [2023-11-29 02:37:15,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:37:15,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:37:15,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524989439] [2023-11-29 02:37:15,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524989439] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:37:15,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:37:15,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:37:15,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703530380] [2023-11-29 02:37:15,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:37:15,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 02:37:15,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:37:15,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 02:37:15,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:37:16,000 INFO L87 Difference]: Start difference. First operand has 105 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 61 states have internal predecessors, (88), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-11-29 02:37:16,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:37:16,262 INFO L93 Difference]: Finished difference Result 207 states and 384 transitions. [2023-11-29 02:37:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 02:37:16,275 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 256 [2023-11-29 02:37:16,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:37:16,282 INFO L225 Difference]: With dead ends: 207 [2023-11-29 02:37:16,282 INFO L226 Difference]: Without dead ends: 103 [2023-11-29 02:37:16,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:37:16,289 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:37:16,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 164 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:37:16,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-29 02:37:16,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-11-29 02:37:16,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 59 states have internal predecessors, (83), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 02:37:16,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 167 transitions. [2023-11-29 02:37:16,345 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 167 transitions. Word has length 256 [2023-11-29 02:37:16,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:37:16,346 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 167 transitions. [2023-11-29 02:37:16,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-11-29 02:37:16,346 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 167 transitions. [2023-11-29 02:37:16,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-11-29 02:37:16,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:37:16,354 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:16,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:37:16,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:37:16,555 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:37:16,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:16,556 INFO L85 PathProgramCache]: Analyzing trace with hash -125746653, now seen corresponding path program 1 times [2023-11-29 02:37:16,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:37:16,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327353299] [2023-11-29 02:37:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:16,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:37:16,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:37:16,559 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:37:16,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-29 02:37:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:16,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:37:16,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:17,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-29 02:37:17,808 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:37:17,808 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:37:17,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327353299] [2023-11-29 02:37:17,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327353299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:37:17,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:37:17,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:37:17,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226957403] [2023-11-29 02:37:17,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:37:17,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:37:17,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:37:17,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:37:17,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:37:17,814 INFO L87 Difference]: Start difference. First operand 103 states and 167 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-29 02:37:18,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:37:18,682 INFO L93 Difference]: Finished difference Result 336 states and 548 transitions. [2023-11-29 02:37:18,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:37:18,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 256 [2023-11-29 02:37:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:37:18,698 INFO L225 Difference]: With dead ends: 336 [2023-11-29 02:37:18,698 INFO L226 Difference]: Without dead ends: 234 [2023-11-29 02:37:18,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:37:18,700 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 135 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:37:18,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 600 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:37:18,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-29 02:37:18,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 203. [2023-11-29 02:37:18,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 116 states have (on average 1.4051724137931034) internal successors, (163), 116 states have internal predecessors, (163), 84 states have call successors, (84), 2 states have call predecessors, (84), 2 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2023-11-29 02:37:18,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 331 transitions. [2023-11-29 02:37:18,769 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 331 transitions. Word has length 256 [2023-11-29 02:37:18,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:37:18,770 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 331 transitions. [2023-11-29 02:37:18,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-29 02:37:18,771 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 331 transitions. [2023-11-29 02:37:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-11-29 02:37:18,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:37:18,777 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:18,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-29 02:37:18,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:37:18,979 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:37:18,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:18,979 INFO L85 PathProgramCache]: Analyzing trace with hash 93108065, now seen corresponding path program 1 times [2023-11-29 02:37:18,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:37:18,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788847364] [2023-11-29 02:37:18,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:18,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:37:18,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:37:18,981 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:37:18,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-29 02:37:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:19,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:37:19,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-29 02:37:19,958 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:37:19,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:37:19,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788847364] [2023-11-29 02:37:19,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788847364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:37:19,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:37:19,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:37:19,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418565271] [2023-11-29 02:37:19,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:37:19,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:37:19,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:37:19,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:37:19,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:37:19,962 INFO L87 Difference]: Start difference. First operand 203 states and 331 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-29 02:37:20,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:37:20,563 INFO L93 Difference]: Finished difference Result 205 states and 332 transitions. [2023-11-29 02:37:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:37:20,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 256 [2023-11-29 02:37:20,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:37:20,578 INFO L225 Difference]: With dead ends: 205 [2023-11-29 02:37:20,578 INFO L226 Difference]: Without dead ends: 103 [2023-11-29 02:37:20,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:37:20,580 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 50 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:37:20,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 189 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:37:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-29 02:37:20,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-11-29 02:37:20,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 59 states have internal predecessors, (81), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 02:37:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 165 transitions. [2023-11-29 02:37:20,607 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 165 transitions. Word has length 256 [2023-11-29 02:37:20,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:37:20,609 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 165 transitions. [2023-11-29 02:37:20,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-29 02:37:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 165 transitions. [2023-11-29 02:37:20,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-11-29 02:37:20,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:37:20,615 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:20,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-29 02:37:20,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:37:20,819 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:37:20,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:20,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1901036641, now seen corresponding path program 1 times [2023-11-29 02:37:20,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:37:20,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778833249] [2023-11-29 02:37:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:20,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:37:20,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:37:20,822 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:37:20,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-29 02:37:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:21,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:37:21,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1553 proven. 39 refuted. 0 times theorem prover too weak. 1852 trivial. 0 not checked. [2023-11-29 02:37:22,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:37:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-29 02:37:22,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:37:22,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778833249] [2023-11-29 02:37:22,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778833249] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:37:22,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:37:22,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-11-29 02:37:22,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225650626] [2023-11-29 02:37:22,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:37:22,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:37:22,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:37:22,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:37:22,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:37:22,971 INFO L87 Difference]: Start difference. First operand 103 states and 165 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-11-29 02:37:27,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:37:27,156 INFO L93 Difference]: Finished difference Result 521 states and 825 transitions. [2023-11-29 02:37:27,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:37:27,156 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 256 [2023-11-29 02:37:27,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:37:27,161 INFO L225 Difference]: With dead ends: 521 [2023-11-29 02:37:27,161 INFO L226 Difference]: Without dead ends: 419 [2023-11-29 02:37:27,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:37:27,162 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 376 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:37:27,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 795 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-29 02:37:27,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-11-29 02:37:27,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 309. [2023-11-29 02:37:27,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 166 states have (on average 1.3433734939759037) internal successors, (223), 168 states have internal predecessors, (223), 138 states have call successors, (138), 4 states have call predecessors, (138), 4 states have return successors, (138), 136 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-29 02:37:27,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 499 transitions. [2023-11-29 02:37:27,249 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 499 transitions. Word has length 256 [2023-11-29 02:37:27,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:37:27,251 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 499 transitions. [2023-11-29 02:37:27,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-11-29 02:37:27,251 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 499 transitions. [2023-11-29 02:37:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-11-29 02:37:27,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:37:27,256 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:27,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-29 02:37:27,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:37:27,456 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:37:27,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:27,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1899189599, now seen corresponding path program 1 times [2023-11-29 02:37:27,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:37:27,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [290020860] [2023-11-29 02:37:27,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:27,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:37:27,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:37:27,459 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:37:27,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ece9c23-dec1-4cd3-80f3-d55f3cc2764f/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-29 02:37:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:27,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 02:37:27,790 INFO L285 TraceCheckSpWp]: Computing forward predicates...