./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-81.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/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_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-81.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/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_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/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 b28ed2134b8a500a12d5d4bc892752e1e825197b4bf6ff6b142642da12ed1a0e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:03:50,396 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:03:50,459 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:03:50,463 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:03:50,464 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:03:50,485 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:03:50,486 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:03:50,486 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:03:50,487 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:03:50,488 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:03:50,488 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:03:50,489 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:03:50,489 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:03:50,490 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:03:50,490 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:03:50,491 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:03:50,491 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:03:50,492 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:03:50,492 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:03:50,493 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:03:50,493 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:03:50,494 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:03:50,494 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:03:50,495 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:03:50,495 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:03:50,496 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:03:50,496 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:03:50,496 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:03:50,497 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:03:50,497 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:03:50,498 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:03:50,498 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:03:50,498 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:03:50,499 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:03:50,499 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:03:50,499 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:03:50,499 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:03:50,499 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:03:50,500 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:03:50,500 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:03:50,500 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:03:50,500 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:03:50,500 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_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b28ed2134b8a500a12d5d4bc892752e1e825197b4bf6ff6b142642da12ed1a0e [2023-11-29 05:03:50,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:03:50,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:03:50,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:03:50,753 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:03:50,754 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:03:50,755 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-81.i [2023-11-29 05:03:53,535 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:03:53,769 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:03:53,769 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-81.i [2023-11-29 05:03:53,780 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/data/3c04fdfbf/db22beff16894091b1a3cbb079ebedba/FLAG45cb772d5 [2023-11-29 05:03:53,794 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/data/3c04fdfbf/db22beff16894091b1a3cbb079ebedba [2023-11-29 05:03:53,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:03:53,798 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:03:53,800 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:03:53,800 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:03:53,805 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:03:53,806 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:03:53" (1/1) ... [2023-11-29 05:03:53,807 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@296c5489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:03:53, skipping insertion in model container [2023-11-29 05:03:53,807 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:03:53" (1/1) ... [2023-11-29 05:03:53,841 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:03:53,984 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_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-81.i[919,932] [2023-11-29 05:03:54,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:03:54,073 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:03:54,086 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_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-81.i[919,932] [2023-11-29 05:03:54,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:03:54,139 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:03:54,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:03:54 WrapperNode [2023-11-29 05:03:54,140 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:03:54,141 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:03:54,141 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:03:54,141 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:03:54,149 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:03:54" (1/1) ... [2023-11-29 05:03:54,162 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:03:54" (1/1) ... [2023-11-29 05:03:54,207 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 258 [2023-11-29 05:03:54,207 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:03:54,208 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:03:54,208 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:03:54,208 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:03:54,220 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:03:54" (1/1) ... [2023-11-29 05:03:54,220 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:03:54" (1/1) ... [2023-11-29 05:03:54,225 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:03:54" (1/1) ... [2023-11-29 05:03:54,247 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 05:03:54,247 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:03:54" (1/1) ... [2023-11-29 05:03:54,247 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:03:54" (1/1) ... [2023-11-29 05:03:54,263 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:03:54" (1/1) ... [2023-11-29 05:03:54,267 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:03:54" (1/1) ... [2023-11-29 05:03:54,271 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:03:54" (1/1) ... [2023-11-29 05:03:54,274 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:03:54" (1/1) ... [2023-11-29 05:03:54,280 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:03:54,281 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:03:54,281 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:03:54,282 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:03:54,282 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:03:54" (1/1) ... [2023-11-29 05:03:54,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:03:54,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:54,312 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:03:54,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:03:54,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:03:54,341 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 05:03:54,342 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 05:03:54,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:03:54,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:03:54,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:03:54,437 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:03:54,441 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:03:54,837 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:03:54,862 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:03:54,862 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 05:03:54,863 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:03:54 BoogieIcfgContainer [2023-11-29 05:03:54,863 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:03:54,865 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:03:54,866 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:03:54,869 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:03:54,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:03:53" (1/3) ... [2023-11-29 05:03:54,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73762c2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:03:54, skipping insertion in model container [2023-11-29 05:03:54,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:03:54" (2/3) ... [2023-11-29 05:03:54,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73762c2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:03:54, skipping insertion in model container [2023-11-29 05:03:54,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:03:54" (3/3) ... [2023-11-29 05:03:54,872 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pr-ci_file-81.i [2023-11-29 05:03:54,891 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:03:54,891 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:03:54,934 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:03:54,940 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;@678dc209, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:03:54,940 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:03:54,944 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 62 states have (on average 1.5483870967741935) internal successors, (96), 63 states have internal predecessors, (96), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-29 05:03:54,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-11-29 05:03:54,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:54,963 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:03:54,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:54,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:54,969 INFO L85 PathProgramCache]: Analyzing trace with hash 424328497, now seen corresponding path program 1 times [2023-11-29 05:03:54,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:54,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091443622] [2023-11-29 05:03:54,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:54,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:55,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:55,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091443622] [2023-11-29 05:03:55,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 05:03:55,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002871977] [2023-11-29 05:03:55,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:55,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:55,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:55,193 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:55,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:03:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:55,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 05:03:55,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2023-11-29 05:03:55,439 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:03:55,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002871977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:03:55,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:03:55,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:03:55,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982671281] [2023-11-29 05:03:55,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:03:55,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 05:03:55,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:55,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 05:03:55,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 05:03:55,479 INFO L87 Difference]: Start difference. First operand has 96 states, 62 states have (on average 1.5483870967741935) internal successors, (96), 63 states have internal predecessors, (96), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-29 05:03:55,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:55,519 INFO L93 Difference]: Finished difference Result 188 states and 343 transitions. [2023-11-29 05:03:55,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 05:03:55,522 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 2 states have call successors, (31) Word has length 198 [2023-11-29 05:03:55,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:55,530 INFO L225 Difference]: With dead ends: 188 [2023-11-29 05:03:55,531 INFO L226 Difference]: Without dead ends: 93 [2023-11-29 05:03:55,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 197 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 05:03:55,538 INFO L413 NwaCegarLoop]: 147 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, 147 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 05:03:55,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 147 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:03:55,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-29 05:03:55,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-11-29 05:03:55,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 60 states have internal predecessors, (88), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-29 05:03:55,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 150 transitions. [2023-11-29 05:03:55,589 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 150 transitions. Word has length 198 [2023-11-29 05:03:55,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:55,590 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 150 transitions. [2023-11-29 05:03:55,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-29 05:03:55,591 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 150 transitions. [2023-11-29 05:03:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-11-29 05:03:55,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:55,596 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:03:55,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:03:55,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:55,797 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:55,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:55,798 INFO L85 PathProgramCache]: Analyzing trace with hash -323311877, now seen corresponding path program 1 times [2023-11-29 05:03:55,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:55,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34296080] [2023-11-29 05:03:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:55,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:55,876 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:03:55,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720393218] [2023-11-29 05:03:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:55,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:55,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:55,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:55,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:03:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:56,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:03:56,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2023-11-29 05:03:56,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:03:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-29 05:03:56,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:56,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34296080] [2023-11-29 05:03:56,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:03:56,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720393218] [2023-11-29 05:03:56,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720393218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:03:56,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:03:56,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 05:03:56,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069980861] [2023-11-29 05:03:56,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:03:56,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:03:56,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:56,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:03:56,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:03:56,835 INFO L87 Difference]: Start difference. First operand 93 states and 150 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 3 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 2 states have call predecessors, (62), 3 states have call successors, (62) [2023-11-29 05:03:57,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:57,983 INFO L93 Difference]: Finished difference Result 364 states and 570 transitions. [2023-11-29 05:03:57,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 05:03:57,984 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 3 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 2 states have call predecessors, (62), 3 states have call successors, (62) Word has length 198 [2023-11-29 05:03:57,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:57,990 INFO L225 Difference]: With dead ends: 364 [2023-11-29 05:03:57,990 INFO L226 Difference]: Without dead ends: 272 [2023-11-29 05:03:57,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2023-11-29 05:03:57,994 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 254 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:57,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 598 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 05:03:57,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-11-29 05:03:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 112. [2023-11-29 05:03:58,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 78 states have (on average 1.5) internal successors, (117), 78 states have internal predecessors, (117), 31 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-29 05:03:58,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 179 transitions. [2023-11-29 05:03:58,040 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 179 transitions. Word has length 198 [2023-11-29 05:03:58,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:58,041 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 179 transitions. [2023-11-29 05:03:58,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 3 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 2 states have call predecessors, (62), 3 states have call successors, (62) [2023-11-29 05:03:58,042 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 179 transitions. [2023-11-29 05:03:58,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-29 05:03:58,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:58,047 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:03:58,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 05:03:58,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 05:03:58,258 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:58,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:58,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1946754454, now seen corresponding path program 1 times [2023-11-29 05:03:58,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:58,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131331169] [2023-11-29 05:03:58,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:58,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:58,309 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:03:58,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322739946] [2023-11-29 05:03:58,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:58,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:58,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:58,311 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:58,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:03:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:58,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:03:58,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 850 proven. 60 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-29 05:03:58,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:03:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 30 proven. 60 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-29 05:03:59,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:59,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131331169] [2023-11-29 05:03:59,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:03:59,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322739946] [2023-11-29 05:03:59,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322739946] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:03:59,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:03:59,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 05:03:59,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795904823] [2023-11-29 05:03:59,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:03:59,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:03:59,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:59,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:03:59,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:03:59,034 INFO L87 Difference]: Start difference. First operand 112 states and 179 transitions. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 3 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2023-11-29 05:03:59,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:59,592 INFO L93 Difference]: Finished difference Result 275 states and 427 transitions. [2023-11-29 05:03:59,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:03:59,594 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 3 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) Word has length 199 [2023-11-29 05:03:59,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:59,597 INFO L225 Difference]: With dead ends: 275 [2023-11-29 05:03:59,597 INFO L226 Difference]: Without dead ends: 164 [2023-11-29 05:03:59,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:03:59,599 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 226 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:59,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 501 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:03:59,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-11-29 05:03:59,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 157. [2023-11-29 05:03:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 110 states have (on average 1.4272727272727272) internal successors, (157), 111 states have internal predecessors, (157), 41 states have call successors, (41), 5 states have call predecessors, (41), 5 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2023-11-29 05:03:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 239 transitions. [2023-11-29 05:03:59,632 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 239 transitions. Word has length 199 [2023-11-29 05:03:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:59,633 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 239 transitions. [2023-11-29 05:03:59,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 3 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2023-11-29 05:03:59,634 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 239 transitions. [2023-11-29 05:03:59,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-29 05:03:59,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:59,637 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:03:59,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 05:03:59,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 05:03:59,844 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:59,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:59,844 INFO L85 PathProgramCache]: Analyzing trace with hash 448795361, now seen corresponding path program 1 times [2023-11-29 05:03:59,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:59,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137178253] [2023-11-29 05:03:59,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:59,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:59,892 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:03:59,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817053950] [2023-11-29 05:03:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:59,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:59,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:59,894 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:59,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:04:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:00,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:04:00,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 800 proven. 147 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2023-11-29 05:04:00,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 27 proven. 150 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2023-11-29 05:04:01,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:01,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137178253] [2023-11-29 05:04:01,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:04:01,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817053950] [2023-11-29 05:04:01,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817053950] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:04:01,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:04:01,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-29 05:04:01,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866829853] [2023-11-29 05:04:01,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:04:01,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 05:04:01,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:01,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 05:04:01,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:04:01,203 INFO L87 Difference]: Start difference. First operand 157 states and 239 transitions. Second operand has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 5 states have call successors, (61), 3 states have call predecessors, (61), 7 states have return successors, (62), 4 states have call predecessors, (62), 5 states have call successors, (62) [2023-11-29 05:04:02,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:02,125 INFO L93 Difference]: Finished difference Result 380 states and 566 transitions. [2023-11-29 05:04:02,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 05:04:02,126 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 5 states have call successors, (61), 3 states have call predecessors, (61), 7 states have return successors, (62), 4 states have call predecessors, (62), 5 states have call successors, (62) Word has length 199 [2023-11-29 05:04:02,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:02,129 INFO L225 Difference]: With dead ends: 380 [2023-11-29 05:04:02,129 INFO L226 Difference]: Without dead ends: 224 [2023-11-29 05:04:02,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=340, Invalid=782, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 05:04:02,132 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 613 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:02,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 550 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 05:04:02,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-11-29 05:04:02,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 136. [2023-11-29 05:04:02,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 100 states have (on average 1.48) internal successors, (148), 100 states have internal predecessors, (148), 31 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-29 05:04:02,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 210 transitions. [2023-11-29 05:04:02,154 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 210 transitions. Word has length 199 [2023-11-29 05:04:02,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:02,155 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 210 transitions. [2023-11-29 05:04:02,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 5 states have call successors, (61), 3 states have call predecessors, (61), 7 states have return successors, (62), 4 states have call predecessors, (62), 5 states have call successors, (62) [2023-11-29 05:04:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 210 transitions. [2023-11-29 05:04:02,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-29 05:04:02,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:02,159 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:04:02,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:04:02,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:02,361 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:02,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:02,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2035668066, now seen corresponding path program 1 times [2023-11-29 05:04:02,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:02,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782292650] [2023-11-29 05:04:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:02,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:02,397 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:04:02,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82332337] [2023-11-29 05:04:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:02,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:02,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:02,399 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:02,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:04:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:02,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:04:02,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:04:02,585 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:04:02,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:02,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782292650] [2023-11-29 05:04:02,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:04:02,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82332337] [2023-11-29 05:04:02,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82332337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:04:02,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:04:02,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:04:02,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328453557] [2023-11-29 05:04:02,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:04:02,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:04:02,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:02,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:04:02,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:04:02,589 INFO L87 Difference]: Start difference. First operand 136 states and 210 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:04:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:02,674 INFO L93 Difference]: Finished difference Result 318 states and 485 transitions. [2023-11-29 05:04:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:04:02,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 199 [2023-11-29 05:04:02,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:02,677 INFO L225 Difference]: With dead ends: 318 [2023-11-29 05:04:02,677 INFO L226 Difference]: Without dead ends: 183 [2023-11-29 05:04:02,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 196 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 05:04:02,679 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 110 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:02,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 378 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:04:02,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-29 05:04:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2023-11-29 05:04:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 138 states have (on average 1.4420289855072463) internal successors, (199), 139 states have internal predecessors, (199), 35 states have call successors, (35), 6 states have call predecessors, (35), 6 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-29 05:04:02,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 269 transitions. [2023-11-29 05:04:02,699 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 269 transitions. Word has length 199 [2023-11-29 05:04:02,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:02,700 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 269 transitions. [2023-11-29 05:04:02,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:04:02,701 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 269 transitions. [2023-11-29 05:04:02,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-29 05:04:02,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:02,704 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:04:02,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:04:02,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:02,905 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:02,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:02,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1448862052, now seen corresponding path program 1 times [2023-11-29 05:04:02,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:02,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177825859] [2023-11-29 05:04:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:02,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:02,936 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:04:02,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113048408] [2023-11-29 05:04:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:02,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:02,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:02,938 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:02,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:04:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:03,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:04:03,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 750 proven. 66 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2023-11-29 05:04:03,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 24 proven. 66 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-29 05:04:03,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:03,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177825859] [2023-11-29 05:04:03,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:04:03,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113048408] [2023-11-29 05:04:03,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113048408] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:04:03,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:04:03,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 05:04:03,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118735142] [2023-11-29 05:04:03,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:04:03,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:04:03,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:03,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:04:03,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:04:03,508 INFO L87 Difference]: Start difference. First operand 180 states and 269 transitions. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 3 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2023-11-29 05:04:04,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:04,040 INFO L93 Difference]: Finished difference Result 500 states and 740 transitions. [2023-11-29 05:04:04,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:04:04,040 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 3 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) Word has length 199 [2023-11-29 05:04:04,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:04,045 INFO L225 Difference]: With dead ends: 500 [2023-11-29 05:04:04,045 INFO L226 Difference]: Without dead ends: 321 [2023-11-29 05:04:04,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:04:04,047 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 257 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:04,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 768 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:04:04,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2023-11-29 05:04:04,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 215. [2023-11-29 05:04:04,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 158 states have (on average 1.3670886075949367) internal successors, (216), 160 states have internal predecessors, (216), 45 states have call successors, (45), 11 states have call predecessors, (45), 11 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-29 05:04:04,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 306 transitions. [2023-11-29 05:04:04,072 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 306 transitions. Word has length 199 [2023-11-29 05:04:04,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:04,073 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 306 transitions. [2023-11-29 05:04:04,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 3 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2023-11-29 05:04:04,073 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 306 transitions. [2023-11-29 05:04:04,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-29 05:04:04,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:04,075 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:04:04,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:04:04,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:04,276 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:04,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:04,277 INFO L85 PathProgramCache]: Analyzing trace with hash -687813477, now seen corresponding path program 1 times [2023-11-29 05:04:04,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:04,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794881004] [2023-11-29 05:04:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:04,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:04,302 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:04:04,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659388382] [2023-11-29 05:04:04,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:04,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:04,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:04,304 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:04,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:04:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:04,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:04:04,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 1279 proven. 60 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2023-11-29 05:04:04,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 114 proven. 63 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2023-11-29 05:04:05,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:05,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794881004] [2023-11-29 05:04:05,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:04:05,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659388382] [2023-11-29 05:04:05,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659388382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:04:05,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:04:05,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-29 05:04:05,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583249147] [2023-11-29 05:04:05,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:04:05,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 05:04:05,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:05,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 05:04:05,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:04:05,091 INFO L87 Difference]: Start difference. First operand 215 states and 306 transitions. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 7 states have call successors, (47), 4 states have call predecessors, (47), 8 states have return successors, (48), 7 states have call predecessors, (48), 7 states have call successors, (48) [2023-11-29 05:04:05,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:05,524 INFO L93 Difference]: Finished difference Result 422 states and 594 transitions. [2023-11-29 05:04:05,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 05:04:05,525 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 7 states have call successors, (47), 4 states have call predecessors, (47), 8 states have return successors, (48), 7 states have call predecessors, (48), 7 states have call successors, (48) Word has length 200 [2023-11-29 05:04:05,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:05,527 INFO L225 Difference]: With dead ends: 422 [2023-11-29 05:04:05,527 INFO L226 Difference]: Without dead ends: 239 [2023-11-29 05:04:05,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=458, Unknown=0, NotChecked=0, Total=702 [2023-11-29 05:04:05,528 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 341 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:05,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 367 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:04:05,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-11-29 05:04:05,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 231. [2023-11-29 05:04:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 170 states have (on average 1.3235294117647058) internal successors, (225), 172 states have internal predecessors, (225), 45 states have call successors, (45), 15 states have call predecessors, (45), 15 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-29 05:04:05,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 315 transitions. [2023-11-29 05:04:05,550 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 315 transitions. Word has length 200 [2023-11-29 05:04:05,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:05,550 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 315 transitions. [2023-11-29 05:04:05,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 7 states have call successors, (47), 4 states have call predecessors, (47), 8 states have return successors, (48), 7 states have call predecessors, (48), 7 states have call successors, (48) [2023-11-29 05:04:05,551 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 315 transitions. [2023-11-29 05:04:05,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-29 05:04:05,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:05,552 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:04:05,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:04:05,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:05,753 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:05,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:05,753 INFO L85 PathProgramCache]: Analyzing trace with hash 129834973, now seen corresponding path program 1 times [2023-11-29 05:04:05,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:05,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743979269] [2023-11-29 05:04:05,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:05,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:05,777 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:04:05,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849700218] [2023-11-29 05:04:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:05,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:05,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:05,778 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:05,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:04:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:05,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 05:04:05,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 902 proven. 213 refuted. 0 times theorem prover too weak. 745 trivial. 0 not checked. [2023-11-29 05:04:07,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 39 proven. 222 refuted. 0 times theorem prover too weak. 1599 trivial. 0 not checked. [2023-11-29 05:04:07,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:07,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743979269] [2023-11-29 05:04:07,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:04:07,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849700218] [2023-11-29 05:04:07,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849700218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:04:07,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:04:07,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 30 [2023-11-29 05:04:07,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613445030] [2023-11-29 05:04:07,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:04:07,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 05:04:07,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:07,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 05:04:07,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2023-11-29 05:04:07,880 INFO L87 Difference]: Start difference. First operand 231 states and 315 transitions. Second operand has 30 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 28 states have internal predecessors, (106), 8 states have call successors, (62), 5 states have call predecessors, (62), 9 states have return successors, (62), 6 states have call predecessors, (62), 8 states have call successors, (62) [2023-11-29 05:04:10,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:10,734 INFO L93 Difference]: Finished difference Result 882 states and 1207 transitions. [2023-11-29 05:04:10,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 05:04:10,735 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 28 states have internal predecessors, (106), 8 states have call successors, (62), 5 states have call predecessors, (62), 9 states have return successors, (62), 6 states have call predecessors, (62), 8 states have call successors, (62) Word has length 200 [2023-11-29 05:04:10,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:10,740 INFO L225 Difference]: With dead ends: 882 [2023-11-29 05:04:10,740 INFO L226 Difference]: Without dead ends: 683 [2023-11-29 05:04:10,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1365, Invalid=3747, Unknown=0, NotChecked=0, Total=5112 [2023-11-29 05:04:10,743 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 1625 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1625 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:10,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1625 Valid, 930 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 1454 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 05:04:10,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2023-11-29 05:04:10,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 360. [2023-11-29 05:04:10,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 253 states have (on average 1.256916996047431) internal successors, (318), 255 states have internal predecessors, (318), 76 states have call successors, (76), 30 states have call predecessors, (76), 30 states have return successors, (76), 74 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-29 05:04:10,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 470 transitions. [2023-11-29 05:04:10,810 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 470 transitions. Word has length 200 [2023-11-29 05:04:10,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:10,811 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 470 transitions. [2023-11-29 05:04:10,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 28 states have internal predecessors, (106), 8 states have call successors, (62), 5 states have call predecessors, (62), 9 states have return successors, (62), 6 states have call predecessors, (62), 8 states have call successors, (62) [2023-11-29 05:04:10,812 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 470 transitions. [2023-11-29 05:04:10,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-29 05:04:10,813 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:10,813 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:04:10,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:04:11,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:11,015 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:11,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:11,015 INFO L85 PathProgramCache]: Analyzing trace with hash 552536799, now seen corresponding path program 1 times [2023-11-29 05:04:11,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:11,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579632657] [2023-11-29 05:04:11,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:11,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:11,042 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:04:11,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383390734] [2023-11-29 05:04:11,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:11,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:11,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:11,044 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:11,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:04:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:11,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 05:04:11,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 62 proven. 174 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-29 05:04:16,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:04:22,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:22,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579632657] [2023-11-29 05:04:22,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:04:22,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383390734] [2023-11-29 05:04:22,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383390734] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:04:22,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:04:22,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 27 [2023-11-29 05:04:22,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469855145] [2023-11-29 05:04:22,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:04:22,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:04:22,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:22,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:04:22,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2023-11-29 05:04:22,296 INFO L87 Difference]: Start difference. First operand 360 states and 470 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:04:26,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:26,326 INFO L93 Difference]: Finished difference Result 886 states and 1184 transitions. [2023-11-29 05:04:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 05:04:26,327 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 200 [2023-11-29 05:04:26,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:26,331 INFO L225 Difference]: With dead ends: 886 [2023-11-29 05:04:26,331 INFO L226 Difference]: Without dead ends: 642 [2023-11-29 05:04:26,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=557, Invalid=2095, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 05:04:26,334 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 532 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:26,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 1012 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 05:04:26,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2023-11-29 05:04:26,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 382. [2023-11-29 05:04:26,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 275 states have (on average 1.2654545454545454) internal successors, (348), 277 states have internal predecessors, (348), 76 states have call successors, (76), 30 states have call predecessors, (76), 30 states have return successors, (76), 74 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-29 05:04:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 500 transitions. [2023-11-29 05:04:26,408 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 500 transitions. Word has length 200 [2023-11-29 05:04:26,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:26,408 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 500 transitions. [2023-11-29 05:04:26,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:04:26,409 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 500 transitions. [2023-11-29 05:04:26,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-29 05:04:26,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:26,410 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:04:26,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 05:04:26,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:26,610 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:26,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:26,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1035811103, now seen corresponding path program 1 times [2023-11-29 05:04:26,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:26,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730296903] [2023-11-29 05:04:26,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:26,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:26,637 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:04:26,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748779098] [2023-11-29 05:04:26,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:26,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:26,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:26,639 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:26,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:04:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:26,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 05:04:26,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 859 proven. 108 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2023-11-29 05:04:31,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:04:37,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:37,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730296903] [2023-11-29 05:04:37,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:04:37,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748779098] [2023-11-29 05:04:37,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748779098] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:04:37,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:04:37,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [19] total 29 [2023-11-29 05:04:37,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191332818] [2023-11-29 05:04:37,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:04:37,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 05:04:37,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:37,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 05:04:37,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:04:37,847 INFO L87 Difference]: Start difference. First operand 382 states and 500 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:04:42,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:42,926 INFO L93 Difference]: Finished difference Result 917 states and 1226 transitions. [2023-11-29 05:04:42,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 05:04:42,927 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 200 [2023-11-29 05:04:42,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:42,930 INFO L225 Difference]: With dead ends: 917 [2023-11-29 05:04:42,930 INFO L226 Difference]: Without dead ends: 651 [2023-11-29 05:04:42,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=608, Invalid=2254, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 05:04:42,932 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 775 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:42,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [775 Valid, 806 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 05:04:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2023-11-29 05:04:43,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 390. [2023-11-29 05:04:43,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 283 states have (on average 1.2756183745583038) internal successors, (361), 285 states have internal predecessors, (361), 76 states have call successors, (76), 30 states have call predecessors, (76), 30 states have return successors, (76), 74 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-29 05:04:43,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 513 transitions. [2023-11-29 05:04:43,017 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 513 transitions. Word has length 200 [2023-11-29 05:04:43,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:43,018 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 513 transitions. [2023-11-29 05:04:43,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:04:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 513 transitions. [2023-11-29 05:04:43,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-29 05:04:43,020 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:43,020 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:04:43,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 05:04:43,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:04:43,221 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:43,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:43,222 INFO L85 PathProgramCache]: Analyzing trace with hash -355752733, now seen corresponding path program 1 times [2023-11-29 05:04:43,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:43,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123526923] [2023-11-29 05:04:43,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:43,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:43,248 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:04:43,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308739060] [2023-11-29 05:04:43,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:43,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:43,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:43,250 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:43,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:04:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:43,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:04:43,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 776 proven. 111 refuted. 0 times theorem prover too weak. 973 trivial. 0 not checked. [2023-11-29 05:04:43,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2023-11-29 05:04:44,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:44,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123526923] [2023-11-29 05:04:44,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:04:44,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308739060] [2023-11-29 05:04:44,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308739060] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:04:44,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:04:44,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-29 05:04:44,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082659273] [2023-11-29 05:04:44,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:04:44,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:04:44,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:44,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:04:44,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:04:44,111 INFO L87 Difference]: Start difference. First operand 390 states and 513 transitions. Second operand has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 18 states have internal predecessors, (101), 5 states have call successors, (61), 3 states have call predecessors, (61), 7 states have return successors, (62), 4 states have call predecessors, (62), 5 states have call successors, (62) [2023-11-29 05:04:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:44,572 INFO L93 Difference]: Finished difference Result 687 states and 907 transitions. [2023-11-29 05:04:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:04:44,573 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 18 states have internal predecessors, (101), 5 states have call successors, (61), 3 states have call predecessors, (61), 7 states have return successors, (62), 4 states have call predecessors, (62), 5 states have call successors, (62) Word has length 200 [2023-11-29 05:04:44,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:44,576 INFO L225 Difference]: With dead ends: 687 [2023-11-29 05:04:44,576 INFO L226 Difference]: Without dead ends: 413 [2023-11-29 05:04:44,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:04:44,577 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 154 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:44,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 413 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:04:44,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2023-11-29 05:04:44,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 393. [2023-11-29 05:04:44,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 284 states have (on average 1.2535211267605635) internal successors, (356), 286 states have internal predecessors, (356), 76 states have call successors, (76), 32 states have call predecessors, (76), 32 states have return successors, (76), 74 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-29 05:04:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 508 transitions. [2023-11-29 05:04:44,635 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 508 transitions. Word has length 200 [2023-11-29 05:04:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:44,635 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 508 transitions. [2023-11-29 05:04:44,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 18 states have internal predecessors, (101), 5 states have call successors, (61), 3 states have call predecessors, (61), 7 states have return successors, (62), 4 states have call predecessors, (62), 5 states have call successors, (62) [2023-11-29 05:04:44,636 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 508 transitions. [2023-11-29 05:04:44,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-29 05:04:44,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:44,637 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:04:44,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:04:44,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 05:04:44,837 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:44,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:44,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1441607907, now seen corresponding path program 1 times [2023-11-29 05:04:44,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:44,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145935639] [2023-11-29 05:04:44,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:44,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:44,867 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:04:44,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739745581] [2023-11-29 05:04:44,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:44,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:44,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:44,868 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:44,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:04:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:45,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:04:45,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:04:49,940 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:04:49,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:49,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145935639] [2023-11-29 05:04:49,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:04:49,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739745581] [2023-11-29 05:04:49,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739745581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:04:49,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:04:49,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 05:04:49,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494738621] [2023-11-29 05:04:49,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:04:49,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 05:04:49,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:49,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 05:04:49,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:04:49,942 INFO L87 Difference]: Start difference. First operand 393 states and 508 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:04:51,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:51,578 INFO L93 Difference]: Finished difference Result 862 states and 1140 transitions. [2023-11-29 05:04:51,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 05:04:51,579 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 200 [2023-11-29 05:04:51,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:51,582 INFO L225 Difference]: With dead ends: 862 [2023-11-29 05:04:51,582 INFO L226 Difference]: Without dead ends: 589 [2023-11-29 05:04:51,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2023-11-29 05:04:51,583 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 351 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:51,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 804 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 05:04:51,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2023-11-29 05:04:51,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 417. [2023-11-29 05:04:51,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 308 states have (on average 1.2629870129870129) internal successors, (389), 310 states have internal predecessors, (389), 76 states have call successors, (76), 32 states have call predecessors, (76), 32 states have return successors, (76), 74 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-29 05:04:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 541 transitions. [2023-11-29 05:04:51,658 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 541 transitions. Word has length 200 [2023-11-29 05:04:51,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:51,659 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 541 transitions. [2023-11-29 05:04:51,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:04:51,659 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 541 transitions. [2023-11-29 05:04:51,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-29 05:04:51,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:51,661 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:04:51,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:04:51,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 05:04:51,862 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:51,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:51,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1265011487, now seen corresponding path program 1 times [2023-11-29 05:04:51,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:51,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825846150] [2023-11-29 05:04:51,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:51,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:51,886 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:04:51,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246835889] [2023-11-29 05:04:51,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:51,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:51,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:51,887 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:51,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:04:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:52,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 05:04:52,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:04:56,674 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:04:56,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:56,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825846150] [2023-11-29 05:04:56,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:04:56,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246835889] [2023-11-29 05:04:56,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246835889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:04:56,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:04:56,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 05:04:56,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518296507] [2023-11-29 05:04:56,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:04:56,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 05:04:56,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:56,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 05:04:56,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:04:56,677 INFO L87 Difference]: Start difference. First operand 417 states and 541 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:04:58,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:58,252 INFO L93 Difference]: Finished difference Result 904 states and 1196 transitions. [2023-11-29 05:04:58,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 05:04:58,253 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 200 [2023-11-29 05:04:58,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:58,256 INFO L225 Difference]: With dead ends: 904 [2023-11-29 05:04:58,256 INFO L226 Difference]: Without dead ends: 607 [2023-11-29 05:04:58,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2023-11-29 05:04:58,258 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 410 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:58,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 861 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 05:04:58,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2023-11-29 05:04:58,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 417. [2023-11-29 05:04:58,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 308 states have (on average 1.2629870129870129) internal successors, (389), 310 states have internal predecessors, (389), 76 states have call successors, (76), 32 states have call predecessors, (76), 32 states have return successors, (76), 74 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-29 05:04:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 541 transitions. [2023-11-29 05:04:58,351 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 541 transitions. Word has length 200 [2023-11-29 05:04:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:58,352 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 541 transitions. [2023-11-29 05:04:58,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:04:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 541 transitions. [2023-11-29 05:04:58,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-29 05:04:58,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:58,354 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:04:58,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 05:04:58,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 05:04:58,554 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:58,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:58,555 INFO L85 PathProgramCache]: Analyzing trace with hash 174237117, now seen corresponding path program 1 times [2023-11-29 05:04:58,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:58,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020445691] [2023-11-29 05:04:58,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:58,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:58,579 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:04:58,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64540025] [2023-11-29 05:04:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:58,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:58,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:58,582 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:58,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:04:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:58,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:04:58,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:04:58,773 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:04:58,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:58,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020445691] [2023-11-29 05:04:58,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:04:58,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64540025] [2023-11-29 05:04:58,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64540025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:04:58,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:04:58,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:04:58,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697887819] [2023-11-29 05:04:58,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:04:58,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:04:58,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:58,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:04:58,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:04:58,776 INFO L87 Difference]: Start difference. First operand 417 states and 541 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:04:58,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:58,892 INFO L93 Difference]: Finished difference Result 730 states and 955 transitions. [2023-11-29 05:04:58,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:04:58,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 201 [2023-11-29 05:04:58,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:58,895 INFO L225 Difference]: With dead ends: 730 [2023-11-29 05:04:58,896 INFO L226 Difference]: Without dead ends: 433 [2023-11-29 05:04:58,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 199 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 05:04:58,897 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 46 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:58,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 298 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:04:58,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-11-29 05:04:58,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 373. [2023-11-29 05:04:58,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 283 states have (on average 1.2826855123674912) internal successors, (363), 283 states have internal predecessors, (363), 62 states have call successors, (62), 27 states have call predecessors, (62), 27 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 05:04:58,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 487 transitions. [2023-11-29 05:04:58,954 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 487 transitions. Word has length 201 [2023-11-29 05:04:58,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:58,954 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 487 transitions. [2023-11-29 05:04:58,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:04:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 487 transitions. [2023-11-29 05:04:58,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-29 05:04:58,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:58,957 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:04:58,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:04:59,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 05:04:59,157 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:59,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:59,158 INFO L85 PathProgramCache]: Analyzing trace with hash 231495419, now seen corresponding path program 1 times [2023-11-29 05:04:59,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:59,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942972965] [2023-11-29 05:04:59,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:59,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:59,182 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:04:59,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104696589] [2023-11-29 05:04:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:59,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:59,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:59,184 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:59,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:04:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:59,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-29 05:04:59,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:05:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 920 proven. 453 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2023-11-29 05:05:30,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:05:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:05:39,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:05:39,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942972965] [2023-11-29 05:05:39,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:05:39,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104696589] [2023-11-29 05:05:39,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104696589] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:05:39,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:05:39,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [38] total 46 [2023-11-29 05:05:39,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303556965] [2023-11-29 05:05:39,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:05:39,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:05:39,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:05:39,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:05:39,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=1646, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 05:05:39,838 INFO L87 Difference]: Start difference. First operand 373 states and 487 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:05:42,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:05:42,414 INFO L93 Difference]: Finished difference Result 897 states and 1193 transitions. [2023-11-29 05:05:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:05:42,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 201 [2023-11-29 05:05:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:05:42,418 INFO L225 Difference]: With dead ends: 897 [2023-11-29 05:05:42,418 INFO L226 Difference]: Without dead ends: 645 [2023-11-29 05:05:42,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=591, Invalid=2831, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 05:05:42,421 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 541 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:05:42,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 625 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 05:05:42,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2023-11-29 05:05:42,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 413. [2023-11-29 05:05:42,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 323 states have (on average 1.3126934984520124) internal successors, (424), 323 states have internal predecessors, (424), 62 states have call successors, (62), 27 states have call predecessors, (62), 27 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 05:05:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 548 transitions. [2023-11-29 05:05:42,470 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 548 transitions. Word has length 201 [2023-11-29 05:05:42,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:05:42,470 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 548 transitions. [2023-11-29 05:05:42,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:05:42,470 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 548 transitions. [2023-11-29 05:05:42,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-29 05:05:42,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:05:42,471 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:05:42,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:05:42,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 05:05:42,672 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:05:42,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:05:42,672 INFO L85 PathProgramCache]: Analyzing trace with hash -846831237, now seen corresponding path program 1 times [2023-11-29 05:05:42,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:05:42,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305793063] [2023-11-29 05:05:42,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:42,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:05:42,691 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:05:42,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290091605] [2023-11-29 05:05:42,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:42,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:05:42,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:05:42,692 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:05:42,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:05:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:42,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:05:42,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:05:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:05:42,841 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:05:42,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:05:42,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305793063] [2023-11-29 05:05:42,841 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:05:42,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290091605] [2023-11-29 05:05:42,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290091605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:05:42,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:05:42,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:05:42,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223038439] [2023-11-29 05:05:42,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:05:42,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:05:42,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:05:42,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:05:42,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:05:42,843 INFO L87 Difference]: Start difference. First operand 413 states and 548 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:05:42,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:05:42,988 INFO L93 Difference]: Finished difference Result 734 states and 981 transitions. [2023-11-29 05:05:42,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:05:42,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 201 [2023-11-29 05:05:42,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:05:42,991 INFO L225 Difference]: With dead ends: 734 [2023-11-29 05:05:42,991 INFO L226 Difference]: Without dead ends: 447 [2023-11-29 05:05:42,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 198 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 05:05:42,992 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 142 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:05:42,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 373 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:05:42,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2023-11-29 05:05:43,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 404. [2023-11-29 05:05:43,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 314 states have (on average 1.2993630573248407) internal successors, (408), 314 states have internal predecessors, (408), 62 states have call successors, (62), 27 states have call predecessors, (62), 27 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 05:05:43,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 532 transitions. [2023-11-29 05:05:43,038 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 532 transitions. Word has length 201 [2023-11-29 05:05:43,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:05:43,039 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 532 transitions. [2023-11-29 05:05:43,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:05:43,039 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 532 transitions. [2023-11-29 05:05:43,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-29 05:05:43,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:05:43,041 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:05:43,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 05:05:43,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:05:43,241 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:05:43,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:05:43,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1457448323, now seen corresponding path program 1 times [2023-11-29 05:05:43,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:05:43,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407457413] [2023-11-29 05:05:43,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:43,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:05:43,265 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:05:43,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762054862] [2023-11-29 05:05:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:43,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:05:43,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:05:43,267 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:05:43,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:05:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:43,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 05:05:43,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:06:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 62 proven. 174 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-29 05:06:07,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:06:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:06:14,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:06:14,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407457413] [2023-11-29 05:06:14,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:06:14,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762054862] [2023-11-29 05:06:14,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762054862] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:06:14,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:06:14,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 25 [2023-11-29 05:06:14,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418435542] [2023-11-29 05:06:14,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:06:14,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:06:14,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:06:14,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:06:14,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:06:14,909 INFO L87 Difference]: Start difference. First operand 404 states and 532 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:06:17,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:06:17,392 INFO L93 Difference]: Finished difference Result 844 states and 1115 transitions. [2023-11-29 05:06:17,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:06:17,393 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 201 [2023-11-29 05:06:17,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:06:17,396 INFO L225 Difference]: With dead ends: 844 [2023-11-29 05:06:17,397 INFO L226 Difference]: Without dead ends: 566 [2023-11-29 05:06:17,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 05:06:17,399 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 363 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:06:17,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 701 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 05:06:17,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2023-11-29 05:06:17,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 404. [2023-11-29 05:06:17,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 314 states have (on average 1.2993630573248407) internal successors, (408), 314 states have internal predecessors, (408), 62 states have call successors, (62), 27 states have call predecessors, (62), 27 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 05:06:17,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 532 transitions. [2023-11-29 05:06:17,472 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 532 transitions. Word has length 201 [2023-11-29 05:06:17,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:06:17,473 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 532 transitions. [2023-11-29 05:06:17,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:06:17,473 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 532 transitions. [2023-11-29 05:06:17,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-29 05:06:17,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:06:17,474 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:06:17,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 05:06:17,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:06:17,675 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:06:17,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:17,675 INFO L85 PathProgramCache]: Analyzing trace with hash -586153031, now seen corresponding path program 1 times [2023-11-29 05:06:17,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:06:17,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336533131] [2023-11-29 05:06:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:17,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:06:17,695 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:06:17,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131819695] [2023-11-29 05:06:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:17,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:06:17,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:06:17,697 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:06:17,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:06:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:17,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:06:17,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:06:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2023-11-29 05:06:18,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:06:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-29 05:06:19,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:06:19,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336533131] [2023-11-29 05:06:19,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:06:19,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131819695] [2023-11-29 05:06:19,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131819695] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:06:19,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:06:19,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 05:06:19,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034806303] [2023-11-29 05:06:19,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:06:19,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:06:19,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:06:19,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:06:19,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:06:19,482 INFO L87 Difference]: Start difference. First operand 404 states and 532 transitions. Second operand has 18 states, 17 states have (on average 5.0) internal successors, (85), 18 states have internal predecessors, (85), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-29 05:06:20,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:06:20,695 INFO L93 Difference]: Finished difference Result 836 states and 1119 transitions. [2023-11-29 05:06:20,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 05:06:20,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.0) internal successors, (85), 18 states have internal predecessors, (85), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) Word has length 201 [2023-11-29 05:06:20,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:06:20,698 INFO L225 Difference]: With dead ends: 836 [2023-11-29 05:06:20,698 INFO L226 Difference]: Without dead ends: 558 [2023-11-29 05:06:20,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2023-11-29 05:06:20,700 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 666 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:06:20,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 852 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 05:06:20,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2023-11-29 05:06:20,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 422. [2023-11-29 05:06:20,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 332 states have (on average 1.283132530120482) internal successors, (426), 332 states have internal predecessors, (426), 62 states have call successors, (62), 27 states have call predecessors, (62), 27 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 05:06:20,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 550 transitions. [2023-11-29 05:06:20,756 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 550 transitions. Word has length 201 [2023-11-29 05:06:20,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:06:20,756 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 550 transitions. [2023-11-29 05:06:20,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.0) internal successors, (85), 18 states have internal predecessors, (85), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-29 05:06:20,756 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 550 transitions. [2023-11-29 05:06:20,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-29 05:06:20,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:06:20,757 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:06:20,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 05:06:20,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:06:20,958 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:06:20,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:20,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1089163791, now seen corresponding path program 1 times [2023-11-29 05:06:20,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:06:20,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565828174] [2023-11-29 05:06:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:20,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:06:20,981 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:06:20,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13092011] [2023-11-29 05:06:20,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:20,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:06:20,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:06:20,983 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:06:20,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:06:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:21,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:06:21,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:06:21,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:06:21,200 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:06:21,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:06:21,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565828174] [2023-11-29 05:06:21,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:06:21,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13092011] [2023-11-29 05:06:21,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13092011] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:06:21,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:06:21,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:06:21,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740072427] [2023-11-29 05:06:21,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:06:21,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:06:21,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:06:21,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:06:21,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:06:21,203 INFO L87 Difference]: Start difference. First operand 422 states and 550 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:06:21,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:06:21,443 INFO L93 Difference]: Finished difference Result 782 states and 1016 transitions. [2023-11-29 05:06:21,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:06:21,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 201 [2023-11-29 05:06:21,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:06:21,446 INFO L225 Difference]: With dead ends: 782 [2023-11-29 05:06:21,446 INFO L226 Difference]: Without dead ends: 502 [2023-11-29 05:06:21,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:06:21,447 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 115 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:06:21,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 496 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:06:21,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2023-11-29 05:06:21,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 439. [2023-11-29 05:06:21,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 345 states have (on average 1.2608695652173914) internal successors, (435), 346 states have internal predecessors, (435), 64 states have call successors, (64), 29 states have call predecessors, (64), 29 states have return successors, (64), 63 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-29 05:06:21,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 563 transitions. [2023-11-29 05:06:21,521 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 563 transitions. Word has length 201 [2023-11-29 05:06:21,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:06:21,521 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 563 transitions. [2023-11-29 05:06:21,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:06:21,521 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 563 transitions. [2023-11-29 05:06:21,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-29 05:06:21,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:06:21,523 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:06:21,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 05:06:21,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:06:21,724 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:06:21,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:21,724 INFO L85 PathProgramCache]: Analyzing trace with hash 423139619, now seen corresponding path program 1 times [2023-11-29 05:06:21,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:06:21,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768490215] [2023-11-29 05:06:21,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:21,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:06:21,742 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:06:21,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579686554] [2023-11-29 05:06:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:21,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:06:21,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:06:21,743 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:06:21,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 05:06:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:22,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 05:06:22,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:06:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 62 proven. 174 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-29 05:06:26,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:06:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:06:32,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:06:32,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768490215] [2023-11-29 05:06:32,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:06:32,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579686554] [2023-11-29 05:06:32,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579686554] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:06:32,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:06:32,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-29 05:06:32,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838710363] [2023-11-29 05:06:32,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:06:32,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:06:32,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:06:32,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:06:32,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:06:32,615 INFO L87 Difference]: Start difference. First operand 439 states and 563 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:06:34,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:06:34,279 INFO L93 Difference]: Finished difference Result 903 states and 1168 transitions. [2023-11-29 05:06:34,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:06:34,280 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 201 [2023-11-29 05:06:34,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:06:34,282 INFO L225 Difference]: With dead ends: 903 [2023-11-29 05:06:34,282 INFO L226 Difference]: Without dead ends: 608 [2023-11-29 05:06:34,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 05:06:34,283 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 365 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:06:34,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 520 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 05:06:34,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2023-11-29 05:06:34,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 450. [2023-11-29 05:06:34,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 356 states have (on average 1.2724719101123596) internal successors, (453), 357 states have internal predecessors, (453), 64 states have call successors, (64), 29 states have call predecessors, (64), 29 states have return successors, (64), 63 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-29 05:06:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 581 transitions. [2023-11-29 05:06:34,360 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 581 transitions. Word has length 201 [2023-11-29 05:06:34,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:06:34,361 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 581 transitions. [2023-11-29 05:06:34,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:06:34,361 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 581 transitions. [2023-11-29 05:06:34,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-29 05:06:34,363 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:06:34,363 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:06:34,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 05:06:34,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:06:34,564 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:06:34,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:34,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1571005087, now seen corresponding path program 1 times [2023-11-29 05:06:34,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:06:34,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430419017] [2023-11-29 05:06:34,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:34,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:06:34,585 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:06:34,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444579778] [2023-11-29 05:06:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:34,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:06:34,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:06:34,586 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:06:34,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 05:06:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:34,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 05:06:34,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:06:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 859 proven. 108 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2023-11-29 05:06:39,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:06:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:06:45,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:06:45,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430419017] [2023-11-29 05:06:45,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:06:45,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444579778] [2023-11-29 05:06:45,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444579778] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:06:45,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:06:45,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 25 [2023-11-29 05:06:45,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651456893] [2023-11-29 05:06:45,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:06:45,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:06:45,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:06:45,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:06:45,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:06:45,878 INFO L87 Difference]: Start difference. First operand 450 states and 581 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:06:48,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:06:48,187 INFO L93 Difference]: Finished difference Result 908 states and 1179 transitions. [2023-11-29 05:06:48,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:06:48,188 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 201 [2023-11-29 05:06:48,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:06:48,190 INFO L225 Difference]: With dead ends: 908 [2023-11-29 05:06:48,191 INFO L226 Difference]: Without dead ends: 602 [2023-11-29 05:06:48,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 05:06:48,192 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 297 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:06:48,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 673 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 05:06:48,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2023-11-29 05:06:48,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 450. [2023-11-29 05:06:48,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 356 states have (on average 1.2724719101123596) internal successors, (453), 357 states have internal predecessors, (453), 64 states have call successors, (64), 29 states have call predecessors, (64), 29 states have return successors, (64), 63 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-29 05:06:48,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 581 transitions. [2023-11-29 05:06:48,255 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 581 transitions. Word has length 201 [2023-11-29 05:06:48,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:06:48,256 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 581 transitions. [2023-11-29 05:06:48,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:06:48,256 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 581 transitions. [2023-11-29 05:06:48,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-29 05:06:48,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:06:48,257 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:06:48,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 05:06:48,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:06:48,458 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:06:48,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:48,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1365505943, now seen corresponding path program 1 times [2023-11-29 05:06:48,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:06:48,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435633081] [2023-11-29 05:06:48,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:48,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:06:48,475 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:06:48,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120196207] [2023-11-29 05:06:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:48,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:06:48,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:06:48,477 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:06:48,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 05:06:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:48,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-29 05:06:48,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:07:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 902 proven. 435 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2023-11-29 05:07:32,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:07:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:07:42,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:07:42,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435633081] [2023-11-29 05:07:42,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:07:42,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120196207] [2023-11-29 05:07:42,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120196207] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:07:42,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:07:42,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [32] total 40 [2023-11-29 05:07:42,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927250765] [2023-11-29 05:07:42,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:07:42,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:07:42,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:07:42,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:07:42,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 05:07:42,252 INFO L87 Difference]: Start difference. First operand 450 states and 581 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:07:51,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:07:51,130 INFO L93 Difference]: Finished difference Result 919 states and 1209 transitions. [2023-11-29 05:07:51,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:07:51,130 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 202 [2023-11-29 05:07:51,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:07:51,133 INFO L225 Difference]: With dead ends: 919 [2023-11-29 05:07:51,133 INFO L226 Difference]: Without dead ends: 613 [2023-11-29 05:07:51,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 05:07:51,135 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 354 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:07:51,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 662 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-11-29 05:07:51,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2023-11-29 05:07:51,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 460. [2023-11-29 05:07:51,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 366 states have (on average 1.273224043715847) internal successors, (466), 367 states have internal predecessors, (466), 64 states have call successors, (64), 29 states have call predecessors, (64), 29 states have return successors, (64), 63 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-29 05:07:51,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 594 transitions. [2023-11-29 05:07:51,198 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 594 transitions. Word has length 202 [2023-11-29 05:07:51,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:07:51,199 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 594 transitions. [2023-11-29 05:07:51,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:07:51,199 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 594 transitions. [2023-11-29 05:07:51,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-29 05:07:51,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:07:51,200 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:07:51,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 05:07:51,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:07:51,401 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:07:51,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:07:51,401 INFO L85 PathProgramCache]: Analyzing trace with hash -2008926730, now seen corresponding path program 1 times [2023-11-29 05:07:51,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:07:51,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078404023] [2023-11-29 05:07:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:07:51,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:07:51,419 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:07:51,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565379412] [2023-11-29 05:07:51,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:07:51,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:07:51,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:07:51,421 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:07:51,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 05:07:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:07:51,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-29 05:07:51,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:08:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 912 proven. 408 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-11-29 05:08:18,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:08:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:08:26,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:08:26,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078404023] [2023-11-29 05:08:26,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:08:26,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565379412] [2023-11-29 05:08:26,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565379412] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:08:26,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:08:26,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [36] total 45 [2023-11-29 05:08:26,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053218815] [2023-11-29 05:08:26,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:08:26,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:08:26,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:08:26,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:08:26,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1576, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 05:08:26,424 INFO L87 Difference]: Start difference. First operand 460 states and 594 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:08:28,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:08:28,648 INFO L93 Difference]: Finished difference Result 940 states and 1225 transitions. [2023-11-29 05:08:28,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 05:08:28,649 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 202 [2023-11-29 05:08:28,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:08:28,651 INFO L225 Difference]: With dead ends: 940 [2023-11-29 05:08:28,651 INFO L226 Difference]: Without dead ends: 624 [2023-11-29 05:08:28,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=559, Invalid=2633, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 05:08:28,653 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 405 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:08:28,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 594 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 05:08:28,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2023-11-29 05:08:28,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 481. [2023-11-29 05:08:28,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 387 states have (on average 1.2868217054263567) internal successors, (498), 388 states have internal predecessors, (498), 64 states have call successors, (64), 29 states have call predecessors, (64), 29 states have return successors, (64), 63 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-29 05:08:28,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 626 transitions. [2023-11-29 05:08:28,715 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 626 transitions. Word has length 202 [2023-11-29 05:08:28,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:08:28,716 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 626 transitions. [2023-11-29 05:08:28,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:08:28,716 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 626 transitions. [2023-11-29 05:08:28,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-29 05:08:28,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:08:28,717 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:08:28,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 05:08:28,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:08:28,918 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:08:28,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:08:28,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1207713910, now seen corresponding path program 1 times [2023-11-29 05:08:28,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:08:28,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842279318] [2023-11-29 05:08:28,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:08:28,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:08:28,935 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:08:28,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11345128] [2023-11-29 05:08:28,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:08:28,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:08:28,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:08:28,936 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:08:28,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 05:08:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:08:29,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:08:29,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:08:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2023-11-29 05:08:29,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:08:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-29 05:08:29,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:08:29,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842279318] [2023-11-29 05:08:29,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:08:29,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11345128] [2023-11-29 05:08:29,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11345128] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:08:29,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:08:29,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2023-11-29 05:08:29,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164033611] [2023-11-29 05:08:29,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:08:29,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:08:29,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:08:29,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:08:29,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:08:29,858 INFO L87 Difference]: Start difference. First operand 481 states and 626 transitions. Second operand has 15 states, 14 states have (on average 5.785714285714286) internal successors, (81), 15 states have internal predecessors, (81), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-29 05:08:31,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:08:31,363 INFO L93 Difference]: Finished difference Result 1053 states and 1376 transitions. [2023-11-29 05:08:31,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 05:08:31,364 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.785714285714286) internal successors, (81), 15 states have internal predecessors, (81), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) Word has length 202 [2023-11-29 05:08:31,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:08:31,367 INFO L225 Difference]: With dead ends: 1053 [2023-11-29 05:08:31,367 INFO L226 Difference]: Without dead ends: 712 [2023-11-29 05:08:31,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 391 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:08:31,368 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 545 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:08:31,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 897 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 05:08:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2023-11-29 05:08:31,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 473. [2023-11-29 05:08:31,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 379 states have (on average 1.2902374670184698) internal successors, (489), 380 states have internal predecessors, (489), 64 states have call successors, (64), 29 states have call predecessors, (64), 29 states have return successors, (64), 63 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-29 05:08:31,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 617 transitions. [2023-11-29 05:08:31,437 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 617 transitions. Word has length 202 [2023-11-29 05:08:31,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:08:31,438 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 617 transitions. [2023-11-29 05:08:31,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.785714285714286) internal successors, (81), 15 states have internal predecessors, (81), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-29 05:08:31,438 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 617 transitions. [2023-11-29 05:08:31,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-29 05:08:31,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:08:31,439 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:08:31,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 05:08:31,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:08:31,640 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:08:31,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:08:31,640 INFO L85 PathProgramCache]: Analyzing trace with hash 597096824, now seen corresponding path program 1 times [2023-11-29 05:08:31,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:08:31,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331355894] [2023-11-29 05:08:31,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:08:31,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:08:31,658 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:08:31,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345897742] [2023-11-29 05:08:31,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:08:31,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:08:31,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:08:31,660 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:08:31,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 05:08:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:08:31,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-29 05:08:31,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 920 proven. 453 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2023-11-29 05:09:00,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:09:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:09:09,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:09,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331355894] [2023-11-29 05:09:09,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:09:09,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345897742] [2023-11-29 05:09:09,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345897742] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:09:09,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:09:09,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [39] total 48 [2023-11-29 05:09:09,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34600599] [2023-11-29 05:09:09,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:09,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:09:09,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:09,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:09:09,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1795, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 05:09:09,253 INFO L87 Difference]: Start difference. First operand 473 states and 617 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:09:11,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:09:11,443 INFO L93 Difference]: Finished difference Result 946 states and 1240 transitions. [2023-11-29 05:09:11,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 05:09:11,444 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 202 [2023-11-29 05:09:11,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:09:11,447 INFO L225 Difference]: With dead ends: 946 [2023-11-29 05:09:11,448 INFO L226 Difference]: Without dead ends: 609 [2023-11-29 05:09:11,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=616, Invalid=2924, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 05:09:11,450 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 370 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:09:11,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 597 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 05:09:11,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2023-11-29 05:09:11,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 473. [2023-11-29 05:09:11,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 379 states have (on average 1.2902374670184698) internal successors, (489), 380 states have internal predecessors, (489), 64 states have call successors, (64), 29 states have call predecessors, (64), 29 states have return successors, (64), 63 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-29 05:09:11,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 617 transitions. [2023-11-29 05:09:11,519 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 617 transitions. Word has length 202 [2023-11-29 05:09:11,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:09:11,519 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 617 transitions. [2023-11-29 05:09:11,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:09:11,519 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 617 transitions. [2023-11-29 05:09:11,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-29 05:09:11,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:09:11,521 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:09:11,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 05:09:11,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 05:09:11,722 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:09:11,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:11,722 INFO L85 PathProgramCache]: Analyzing trace with hash -2085114780, now seen corresponding path program 1 times [2023-11-29 05:09:11,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:11,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624681517] [2023-11-29 05:09:11,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:11,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:11,745 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:09:11,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414743621] [2023-11-29 05:09:11,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:11,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:09:11,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:09:11,747 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:09:11,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 05:09:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:11,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:09:11,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:12:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:12:19,573 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:12:19,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:12:19,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624681517] [2023-11-29 05:12:19,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:12:19,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414743621] [2023-11-29 05:12:19,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414743621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:12:19,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:12:19,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 05:12:19,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660107199] [2023-11-29 05:12:19,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:12:19,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:12:19,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:12:19,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:12:19,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:12:19,575 INFO L87 Difference]: Start difference. First operand 473 states and 617 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:12:19,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:12:19,874 INFO L93 Difference]: Finished difference Result 519 states and 666 transitions. [2023-11-29 05:12:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:12:19,875 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 202 [2023-11-29 05:12:19,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:12:19,878 INFO L225 Difference]: With dead ends: 519 [2023-11-29 05:12:19,878 INFO L226 Difference]: Without dead ends: 517 [2023-11-29 05:12:19,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:12:19,879 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 105 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:12:19,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 628 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:12:19,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2023-11-29 05:12:19,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 503. [2023-11-29 05:12:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 401 states have (on average 1.2768079800498753) internal successors, (512), 403 states have internal predecessors, (512), 68 states have call successors, (68), 33 states have call predecessors, (68), 33 states have return successors, (68), 66 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-29 05:12:19,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 648 transitions. [2023-11-29 05:12:19,960 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 648 transitions. Word has length 202 [2023-11-29 05:12:19,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:12:19,960 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 648 transitions. [2023-11-29 05:12:19,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:12:19,960 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 648 transitions. [2023-11-29 05:12:19,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-29 05:12:19,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:12:19,962 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:12:19,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 05:12:20,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 05:12:20,162 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:12:20,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:12:20,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1372818507, now seen corresponding path program 1 times [2023-11-29 05:12:20,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:12:20,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153478722] [2023-11-29 05:12:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:12:20,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:12:20,181 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:12:20,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376357930] [2023-11-29 05:12:20,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:12:20,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:12:20,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:12:20,182 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:12:20,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 05:12:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:12:20,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:12:20,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:12:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 850 proven. 60 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-29 05:12:20,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:12:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 30 proven. 60 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-29 05:12:20,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:12:20,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153478722] [2023-11-29 05:12:20,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:12:20,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376357930] [2023-11-29 05:12:20,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376357930] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:12:20,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:12:20,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 05:12:20,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217880607] [2023-11-29 05:12:20,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:12:20,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:12:20,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:12:20,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:12:20,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:12:20,815 INFO L87 Difference]: Start difference. First operand 503 states and 648 transitions. Second operand has 12 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 3 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2023-11-29 05:12:21,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:12:21,429 INFO L93 Difference]: Finished difference Result 926 states and 1189 transitions. [2023-11-29 05:12:21,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 05:12:21,430 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 3 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) Word has length 202 [2023-11-29 05:12:21,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:12:21,432 INFO L225 Difference]: With dead ends: 926 [2023-11-29 05:12:21,432 INFO L226 Difference]: Without dead ends: 559 [2023-11-29 05:12:21,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:12:21,433 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 210 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:12:21,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 542 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:12:21,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2023-11-29 05:12:21,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 491. [2023-11-29 05:12:21,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 389 states have (on average 1.2699228791773778) internal successors, (494), 391 states have internal predecessors, (494), 68 states have call successors, (68), 33 states have call predecessors, (68), 33 states have return successors, (68), 66 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-29 05:12:21,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 630 transitions. [2023-11-29 05:12:21,517 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 630 transitions. Word has length 202 [2023-11-29 05:12:21,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:12:21,518 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 630 transitions. [2023-11-29 05:12:21,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 3 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2023-11-29 05:12:21,518 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 630 transitions. [2023-11-29 05:12:21,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-29 05:12:21,519 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:12:21,519 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:12:21,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 05:12:21,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:12:21,720 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:12:21,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:12:21,720 INFO L85 PathProgramCache]: Analyzing trace with hash 631896060, now seen corresponding path program 1 times [2023-11-29 05:12:21,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:12:21,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984664553] [2023-11-29 05:12:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:12:21,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:12:21,737 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:12:21,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112828549] [2023-11-29 05:12:21,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:12:21,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:12:21,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:12:21,738 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:12:21,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 05:12:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:12:21,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 05:12:21,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:12:46,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 62 proven. 174 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-29 05:12:46,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:12:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:12:55,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:12:55,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984664553] [2023-11-29 05:12:55,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:12:55,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112828549] [2023-11-29 05:12:55,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112828549] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:12:55,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:12:55,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [18] total 27 [2023-11-29 05:12:55,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169476147] [2023-11-29 05:12:55,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:12:55,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:12:55,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:12:55,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:12:55,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2023-11-29 05:12:55,953 INFO L87 Difference]: Start difference. First operand 491 states and 630 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:12:59,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:12:59,986 INFO L93 Difference]: Finished difference Result 1001 states and 1298 transitions. [2023-11-29 05:12:59,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 05:12:59,987 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 203 [2023-11-29 05:12:59,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:12:59,989 INFO L225 Difference]: With dead ends: 1001 [2023-11-29 05:12:59,989 INFO L226 Difference]: Without dead ends: 646 [2023-11-29 05:12:59,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=322, Invalid=1160, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 05:12:59,991 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 634 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:12:59,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 456 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 05:12:59,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2023-11-29 05:13:00,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 494. [2023-11-29 05:13:00,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 392 states have (on average 1.2729591836734695) internal successors, (499), 394 states have internal predecessors, (499), 68 states have call successors, (68), 33 states have call predecessors, (68), 33 states have return successors, (68), 66 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-29 05:13:00,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 635 transitions. [2023-11-29 05:13:00,069 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 635 transitions. Word has length 203 [2023-11-29 05:13:00,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:13:00,070 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 635 transitions. [2023-11-29 05:13:00,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:13:00,070 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 635 transitions. [2023-11-29 05:13:00,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-29 05:13:00,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:13:00,071 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:13:00,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-29 05:13:00,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 05:13:00,272 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:13:00,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:13:00,272 INFO L85 PathProgramCache]: Analyzing trace with hash -185752390, now seen corresponding path program 1 times [2023-11-29 05:13:00,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:13:00,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281031473] [2023-11-29 05:13:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:13:00,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:13:00,289 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:13:00,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055340087] [2023-11-29 05:13:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:13:00,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:13:00,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:13:00,291 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:13:00,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 05:13:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:13:00,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-29 05:13:00,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:13:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 917 proven. 456 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2023-11-29 05:13:39,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:13:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:13:53,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:13:53,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281031473] [2023-11-29 05:13:53,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:13:53,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055340087] [2023-11-29 05:13:53,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055340087] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:13:53,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:13:53,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [39] total 48 [2023-11-29 05:13:53,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337855780] [2023-11-29 05:13:53,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:13:53,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:13:53,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:13:53,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:13:53,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1795, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 05:13:53,104 INFO L87 Difference]: Start difference. First operand 494 states and 635 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:13:57,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:13:57,131 INFO L93 Difference]: Finished difference Result 984 states and 1274 transitions. [2023-11-29 05:13:57,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 05:13:57,132 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 203 [2023-11-29 05:13:57,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:13:57,134 INFO L225 Difference]: With dead ends: 984 [2023-11-29 05:13:57,134 INFO L226 Difference]: Without dead ends: 626 [2023-11-29 05:13:57,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=616, Invalid=2924, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 05:13:57,137 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 565 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:13:57,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 449 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 05:13:57,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2023-11-29 05:13:57,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 467. [2023-11-29 05:13:57,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 365 states have (on average 1.2575342465753425) internal successors, (459), 367 states have internal predecessors, (459), 68 states have call successors, (68), 33 states have call predecessors, (68), 33 states have return successors, (68), 66 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-29 05:13:57,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 595 transitions. [2023-11-29 05:13:57,214 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 595 transitions. Word has length 203 [2023-11-29 05:13:57,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:13:57,214 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 595 transitions. [2023-11-29 05:13:57,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:13:57,214 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 595 transitions. [2023-11-29 05:13:57,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-29 05:13:57,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:13:57,215 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:13:57,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 05:13:57,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 05:13:57,416 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:13:57,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:13:57,416 INFO L85 PathProgramCache]: Analyzing trace with hash 909517890, now seen corresponding path program 1 times [2023-11-29 05:13:57,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:13:57,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613560460] [2023-11-29 05:13:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:13:57,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:13:57,432 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:13:57,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042699753] [2023-11-29 05:13:57,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:13:57,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:13:57,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:13:57,433 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:13:57,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 05:13:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:13:57,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 05:13:57,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:14:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 62 proven. 174 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-29 05:14:08,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:14:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:14:15,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:14:15,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613560460] [2023-11-29 05:14:15,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:14:15,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042699753] [2023-11-29 05:14:15,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042699753] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:14:15,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:14:15,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-29 05:14:15,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095632417] [2023-11-29 05:14:15,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:14:15,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:14:15,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:14:15,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:14:15,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:14:15,044 INFO L87 Difference]: Start difference. First operand 467 states and 595 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:14:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:14:16,879 INFO L93 Difference]: Finished difference Result 968 states and 1251 transitions. [2023-11-29 05:14:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:14:16,880 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 203 [2023-11-29 05:14:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:14:16,883 INFO L225 Difference]: With dead ends: 968 [2023-11-29 05:14:16,883 INFO L226 Difference]: Without dead ends: 628 [2023-11-29 05:14:16,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 05:14:16,884 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 347 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:14:16,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 615 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 05:14:16,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2023-11-29 05:14:16,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 489. [2023-11-29 05:14:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 387 states have (on average 1.2713178294573644) internal successors, (492), 389 states have internal predecessors, (492), 68 states have call successors, (68), 33 states have call predecessors, (68), 33 states have return successors, (68), 66 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-29 05:14:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 628 transitions. [2023-11-29 05:14:16,962 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 628 transitions. Word has length 203 [2023-11-29 05:14:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:14:16,962 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 628 transitions. [2023-11-29 05:14:16,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:14:16,962 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 628 transitions. [2023-11-29 05:14:16,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-29 05:14:16,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:14:16,963 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:14:16,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 05:14:17,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:17,164 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:14:17,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:14:17,164 INFO L85 PathProgramCache]: Analyzing trace with hash 91869440, now seen corresponding path program 1 times [2023-11-29 05:14:17,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:14:17,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810117973] [2023-11-29 05:14:17,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:17,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:14:17,181 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:14:17,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533499812] [2023-11-29 05:14:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:17,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:17,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:14:17,182 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:14:17,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 05:14:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:14:17,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 05:14:17,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:14:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 68 proven. 252 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2023-11-29 05:14:27,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:14:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 05:14:34,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:14:34,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810117973] [2023-11-29 05:14:34,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:14:34,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533499812] [2023-11-29 05:14:34,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533499812] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:14:34,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:14:34,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [18] total 25 [2023-11-29 05:14:34,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830303651] [2023-11-29 05:14:34,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:14:34,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:14:34,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:14:34,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:14:34,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:14:34,348 INFO L87 Difference]: Start difference. First operand 489 states and 628 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:14:36,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:14:36,301 INFO L93 Difference]: Finished difference Result 990 states and 1283 transitions. [2023-11-29 05:14:36,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:14:36,301 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 203 [2023-11-29 05:14:36,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:14:36,304 INFO L225 Difference]: With dead ends: 990 [2023-11-29 05:14:36,304 INFO L226 Difference]: Without dead ends: 628 [2023-11-29 05:14:36,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 05:14:36,306 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 319 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:14:36,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 629 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 05:14:36,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2023-11-29 05:14:36,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 479. [2023-11-29 05:14:36,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 377 states have (on average 1.2625994694960212) internal successors, (476), 379 states have internal predecessors, (476), 68 states have call successors, (68), 33 states have call predecessors, (68), 33 states have return successors, (68), 66 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-29 05:14:36,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 612 transitions. [2023-11-29 05:14:36,395 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 612 transitions. Word has length 203 [2023-11-29 05:14:36,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:14:36,395 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 612 transitions. [2023-11-29 05:14:36,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 05:14:36,395 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 612 transitions. [2023-11-29 05:14:36,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-29 05:14:36,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:14:36,396 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:14:36,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 05:14:36,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:36,597 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:14:36,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:14:36,598 INFO L85 PathProgramCache]: Analyzing trace with hash 587031816, now seen corresponding path program 1 times [2023-11-29 05:14:36,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:14:36,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127864952] [2023-11-29 05:14:36,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:36,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:14:36,615 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:14:36,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837157510] [2023-11-29 05:14:36,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:36,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:36,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:14:36,616 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:14:36,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c666bcad-12d8-4049-8c8b-2ae6e06cd37c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 05:14:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:14:36,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:14:36,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:16:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 750 proven. 66 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2023-11-29 05:16:17,242 INFO L327 TraceCheckSpWp]: Computing backward predicates...